System of active vibration protection and stabilisation

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used to control vibrations of damped mass and to stabilise its static position. Said system comprises suspension that incorporates hydraulic engine with double-acting electro hydraulic booster. Hydraulic engine plunger is articulated via flexible element with stabilised mass. Hydraulic engine power cylinder casing is coupled via flexible element with wheel axle or vehicle frame. Said system incorporates controller to generate control law on the basis of preset reference properties of motion and current state of stabilised mass and hydraulic engine plunger. One of controller inputs is connected via acceleration transducer with stabilised mass, while another input is connected via power cylinder casing current collector and double-way rod bars with feedback potentiometre. The latter controls power cylinder plunger positions at every time interval. Controller output is connected with electro hydraulic booster input.

EFFECT: reduced accelerations, higher accuracy of stabilisation.

1 dwg

 

The system of active vibration protection and stabilization relates to the field of engineering and serves to control the oscillation of depreciable weight (machine body, cab, driver's seat and others) and/or the stabilization of its position in space. The system can be used in aircraft, wheeled and tracked machines and other engineering fields.

The intensity fluctuations of a wide class of objects increases with the increasing capacity of power equipment, increasing the speed of movement of vehicles. Requirements for systems and vibration protection, usually contradictory. On the one hand, these systems must be sufficiently pliable to obtain a satisfactory vibration protection characteristics, on the other hand to be rigid enough to prevent large relative displacements of depreciable object during movement. For vehicles, it is also necessary to ensure constant contact of the steering wheels with the road. The traditional system of vibroprotection of passive provocativly elements can not fully meet the contradictory requirements to the parameters of the oscillations of depreciable systems.

For vibration protection and stabilization of optimality in transition processes is the basis of the problem. You do not need to find the best the trajectory amortized and stabilized mass. Instead, you want to ensure high speed and accuracy when performing its assigned trajectory amortized and stabilized weight in transitional processes.

Systems of active vibration protection and stabilization are complex non-linear multidimensional control systems functioning normally, in non-stationary conditions. For solving the problem of the algorithms for intelligent control based on adaptive controllers, connecting the phase coordinates of the system and the criterion of quality control and combination of accuracy and speed without overshoot with guaranteed stability of the system.

A known system of active vibration protection and stabilization implemented in the design of the controller, which decides known and new classes of problems that require implementation of the prescribed properties of motion in transient.

Known dynamic system in the form of two masses connected provocatively connections and power drive. Scheme active two-mass vibrating system can be equipped with passive provocatively or connections active connections and contains: m1, m2- amortized and unamortized mass; P1-P5- forces acting on mass m1and m2; x - vertical AC is the amortized communication and/or stabilized mass m 1and m2;- vertical movement of unamortized mass m2q - kinematic perturbation, the actuating device in the form of a hydraulic cylinder double acting with displacement z of the plunger [1].

To demonstrate the capabilities of regulators developed a special visual environment of computer simulation, which allows in a very short period of time to assess the quality of regulators in a variety of management tasks, in particular management tasks fluctuations: multisupport wheeled and tracked chassis; cabs, seats a human operator of the mobile machine, special containers that are installed on mobile machines, etc. For fast tracked chassis for special purpose and for multisupport wheeled vehicles are extremely important task is to reduce the longitudinal angular oscillations of the chassis. Optimality in transition processes is the basis for the task.

Well-known classical techniques based on theory of optimal systems: dynamic programming, maximum principle, the principle of minimum generalized work, analytical design of controllers and other These techniques do not allow for real nonlinear systems to build a controller in a closed form, not to mention the fact, to embed in the management of quality criteria in an explicit form. For determination of the optimum controller parameters when using these methods in the final stage required as a rule, the attraction of numerical optimization methods.

Advantages of the system of active vibration protection and stabilization based controllers are as follows.

1. Regulators connected in closed form control with the parameters of the criterion of quality control and output variables of the controlled system, including the actuator.

2. Combines high accuracy and speed without overshoot.

3. Provides adaptive management through the use of derivatives of the second order and above the controlled variable.

4. In various types of regulators can be used derivative of the output variable from the first to the fourth order. There is a choice of this class of controller, providing ease of implementation with acceptable accuracy control.

5. The possibility of compensating for the shortcomings of the used power of the Executive actuator (fluid leakage in the hydraulic circuits, the counter EMF in electric drives and others).

6. This opens up the possibility of developing and manufacturing intelligent controllers new generation with patent purity.

The known system is not fully solves the technical problem - ensure smooth running of the vehicle and stabilize the situation amortised weight sleds is of high inertia because of the parallel connection of passive provocativly elements and level with relaxation series-connected element, performing their functions at frequencies above 10 Hz.

As a prototype system known active vibration protection, which includes the suspension of depreciable masses containing depreciable mass, the hydraulic motor with electro-hydraulic steering double-acting installed in parallel elastic element, the plunger of the hydraulic motor is not rigidly associated with depreciable mass, the housing of the power cylinder of the hydraulic drive motor attached to the unamortized mass - kinematic excitation source, for example, to the axis of the wheel or the frame of the machine [2].

The operation of the known system is that the measured signal is proportional to the force transmitted to vibroisolating mass. Active vibroprotection system with electro-hydraulic drive with inverter-type nozzle, the valve generates a control signal proportional to the above-mentioned force.

The prototype does not fully solve the technical problem to provide vibration protection and stabilization of depreciable mass, for example a vehicle, due to the relatively high inertia of the hydraulic and electrical parts servo (used only the current value of the acceleration amortized mass and relative movement of amortized and unamortized masses). Do not use ekström is whether, formed on the basis of the reference properties amortized/stabilized mass at each moment of time [2].

The disadvantages of the prototype are as follows:

- there is no connection criteria quality control generated by the control signal. The quality criterion is the basis of management objectives and its formulations depend on the results of management;

- to generate a control signal used only operating at amortized a lot of effort. When this control is formed in opposition to these efforts;

- ignores the state of the actuator actuator;

is not provided for dynamic stabilization of the situation amortized mass;

is not provided by the adaptability of management;

- not possible to combine the accuracy and performance management;

- specifies the device does not participate in the formation of the control.

The basis of the invention the goal of the project - improving the efficiency of vibration protection and stabilization by creating comfort in the workplace, reduce fatigue of the driver and exclude the development of occupational diseases - diseases of musculoskeletal system for drivers of vehicles, improve the ride and the stabilization of the vehicle body relative to the provisions of art is political equilibrium.

The technical problem of the invention is achieved in that in the system of active vibration protection and stabilization, including the suspension of depreciable and stabilized mixture of depreciable and stabilized mass, the hydraulic motor with electro-hydraulic steering double-acting, piston hydraulic, kinematically connected through elastic element with depreciable and stabilized mass, and the case of the power cylinder of the hydraulic motor, which is attached via an elastic element to unamortized mass is the source of kinematic excitation, mainly to the axis of the wheel or the frame of the machine according to the invention, the system of active vibration protection and stabilization provided with a controller that generates a control law based on specific, such as the system interface reference properties and the current state amortized and stabilized mass and plunger of the hydraulic motor, one of the inputs of the controller via the acceleration sensor attached to depreciable and stabilized mass, and another entrance through the collector housing of the power cylinder of the hydraulic motor and the slats of the bilateral rod electrically connected with potentiometer feedback, fixing each time the position of the piston of the power cylinder of the hydraulic motor, while the output of the controller is connected to the input e is tragikomicheskoe amplifier.

The technical result of the invention is provided by the reduction of the accelerations in the problem of vibration protection housing and the driver of the vehicle, as well as high accuracy of stabilization of the position of the body depreciable object relative to the position of static equilibrium.

The invention is illustrated in the drawing, which shows a General view of the system.

The system of active vibration protection and stabilization is illustrated for the design of the suspension of the vehicle that contains the acceleration sensor 1 of depreciable and/or stabilized mass 2 (chassis, frame, cab, driver seat etc), passive suspension 3, which may contain elastic element, for example, pneumatic or pneumatic-hydraulic and shock absorber, the hydraulic motor 4, the plunger 5 of the actuator 4, the current collector 6, the insulator 7, the transition cylinder 8, the slats 9, silent block 10, which characterizes the rigidity of the hydraulic motor 4 to the unamortized weight 11, which may be a wheel, ice rink or frame of vehicle vibration protection of the driver, the sensor 12 and the position of the plunger 5 of the cylinder 4, for example, in the form of a potentiometer feedback, electrohydraulic amplifier 13, a controller 14 and the interface 15 to set the properties of the reference motion and amortized stabilized supply via the controller 14.

The VI is rosasite and stabilization works in adaptive mode. The controller 14 generates a signal u of adaptive management. When the signal and control windings of the electro-hydraulic Converter amplifier 13 appears current, which leads to the shift of the q5spool valve. The result is precision movement q6rod 5 of the cylinder 4 together with amortized and/or stabilized mass 2. When moving rod 5 also move the slats 9 of the potentiometer 12, resulting in the feedback circuit voltageproportional to this displacement. Evaluation of the acceleration q7depreciable mass 2, moveplunger 5, as well as the desired properties of the reference motion depreciable mass 2 from interface 15 are input to the controller 14, which generates a control in accordance with the specified interface 15 properties of motion amortized and/or stabilized mass.

The above-described system according to the invention is simplified and does not show the filters from the sensors, analog-to-digital and digital-analog converters, the elements of the hydraulic drive, etc. But the new system allows us to illustrate the main features of the technology of active vibration protection and stabilization.

Simplified the mathematical modelnovias system design of active vibration protection and stabilization according to the invention for one support vehicle is:

,

Here f(.) - the desired properties of the motion amortized and/or stabilized mass; fj(.) well - known operators (j=0, 1, 2, 3); kxTxrespectively the gain and time constant of the electrohydraulic Converter; kzTz- gain and time constant of the power actuator; ks, Ts- gain and time constant of the measuring device; keparameter hydraulic characterizing leakage of the working fluid in its normal functioning; k0z- coefficient of the position feedback of the plunger actuator; Σ0, Σ1, Σ2- link forces acting respectively on the mass m1and m2:

where Rji(.) well - known functions in the General nonlinear case.

In system (1) the first four equations - equations of motion of mass m1and m2; the fifth equation of the amplifier-Converter (spool valve): sixth equation of the actuator (hydraulic cylinder double-acting); the seventh is the equation of the measuring device. As can be seen from the last observed acceleration is amortized mass. Other derivatives of this variable, used in the control algorithm, are identified. The equation of the sensor accelerations recorded for the simplest case and can be updated if necessary. The equation of motion sensor actuator is static and therefore its equation is not given.

The role of the functional f1in the controller (2) is to make the controlled system, the desired characteristics of the movement. The functional f2reflect the actual dynamic state of the system. The functional f3reflects the state of the actuator. The role of the functional f0is to limit control signal when required. The first term in the expression (2) compensates for the weakening of the control signal with the introduction of a priori negative feedback the ligature signal, the corresponding output variable of the actuator (or a relative offset amortized and unamortized masses). If feedback is not used: k0z=0.

Thanks to the coordinated work in every moment of time all the "team members" when using nonlinear assigned properties of the motion controller (2) combines high performance and accuracy without overshoot. This compensated own system motion than desired, as well as the drawbacks of the Executive mechanisms.

Management in accordance with algorithm (2) adequately hardware of modern digital technology and guarantees asymptotic stability of the controlled system. It does not require parametric optimization to determine the parameters of the control algorithm: their values are calculated accurately without involving numerical methods. When using nonlinear desired properties with high accuracy and speed without overshoot. In addition, ensure the stability and quality of functioning close to the potential of the managed systems.

The control is performed in consecutive moments of time T[j-1], T[j], T[j+1] so that the respective controlled variables sought to the backside of the authorized command value for the optimal trajectory, which is a solution of the equations of the reference motion. Used in the controller (2) unobserved variables is identified.

The modern level of development of engineering and information technologies allow us to implement a new system design of active vibration protection and stabilization with the achievement of the technical result using, for example, the CoDeSys environment for programming controllers [3].

Industrial development of the invention it is assumed in the conditions of Belarus and CIS countries.

Sources of information

1. Furungiev R.I., Khomich A.L. Regulators new generation to reduce fluctuations of mobile machines. Bulletin of the military Academy of the Republic of Belarus. No. 4(17) 29 Debra 2007 S-139.

2. Sharapov E Active suspension of vehicles. - Riga. RITU, 1980. - 262 C.

3. User manual CoDeSys V3. The installation and first start. Version 3.0. [http://www.codesys.ru/3s/Visu1.htm].

The system of active vibration protection and stabilization, including the suspension of depreciable and stabilized mixture of depreciable and stabilized mass, the hydraulic motor with electro-hydraulic steering double-acting, piston hydraulic, kinematically connected through elastic element with depreciable and stabilized mass, and the case of the power cylinder of the hydraulic motor, which is attached via an elastic element to NEUMO the automated mass suspension - the source of the kinematic excitation of the suspension, mainly to the axis of the wheel or the frame of the machine, characterized in that the system includes a controller that generates a control law based on the specified reference properties and the current state amortized and stabilized mass and plunger of the hydraulic motor, one of the entrances through which the accelerometer is attached to depreciable and stabilized mass, and another entrance through the collector housing of the power cylinder of the hydraulic motor and the slats of the bilateral rod electrically connected with potentiometer feedback, fixing each time the position of the piston of the power cylinder of the hydraulic motor, while the output of the controller is connected to the input of the electrohydraulic amplifier.



 

Same patents:

FIELD: machine building.

SUBSTANCE: invention relates to automotive machine building, particularly, to automotive cushioning systems. The proposed shock absorber comprises hydraulic cylinder filled with working fluid and accommodating piston and rod, and hydraulic accumulator. The rod lower part is furnished with radial throttling orifices and spring-loaded control plunger with edge covering aforesaid orifices. The said radial throttling orifices are spaced along the rod length so that the said control plunger jumps the orifices in turn, thus gradually varying the total flow section. The control plunger is fitted in the piston, outside the working fluid flows, and can deviate from its normal position only under gravity.

EFFECT: higher comfort and controllability of vehicle in running over irregular road coat.

3 dwg

Dynamic dampener // 2354867

FIELD: mechanical engineering.

SUBSTANCE: invention refers to mechanical engineering, particularly to dampeners of vibrations of mechanical engineering equipment. The dynamic dampener of vibrations consists of a case, divided into three chambers by means of elastic elements in form of membranes and an insertion. The upper and lower chambers are filled with magnetic liquid, while the middle one is filled with air. Systems of channels arranged in the insertion connect the upper and lower chambers. The case of the dampener is enveloped with a coil connected to a control block. From the sensor of vibration acceleration installed on the projecting rod of the insertion signals are transmitted to the control block.

EFFECT: expanding working range of frequency damping and its regulating.

1 dwg

FIELD: automotive industry.

SUBSTANCE: hydraulic shock absorber comprises hydraulic cylinder (1) and rod with piston (2). The piston is provided with throttle openings (3) and receives the relief compression valve (4) and relief delivery valve (5). The shock absorber receives outer pipeline (6) for communication the top and bottom spaces of hydraulic cylinder (1), step motor (11) provided with mechanical drive (12) for control of compression (8) and delivery (10) cock-throttles, and control unit (13) connected with step motor (11). The pipeline receives, connected in parallel, the unit composed of by-pass valve (7) and compression cock-throttle (8) connected in series and unit composed of by-pass valve (9) and delivery cock-throttle (10) connected in series.

EFFECT: improved shock absorbing.

1 dwg

FIELD: transport engineering; suspensions.

SUBSTANCE: proposed suspension hydraulic shock absorber has hydraulic cylinder, rod with piston, throttling holes made in piston, and compression valve and rebound valves. Sock absorber contains additionally external liquid flow main line secured between upper and lower spaces of hydraulic cylinder, with compression bypass spring valve and rebound bypass spring valve installed in parallel with external main line and device to adjust compression ratio of springs of bypass valves. Said device includes step motor and worms with floating nuts installed in compression and rebound valve housings, worms being mechanically coupled with step motor. Worms with floating nuts are set into rotation by step motor simultaneously, owing to corresponding arrangement of bypass valves, and provide synchronous adjustment of compression ratio of valve springs owing to translational displacements of floating nuts along worms. Shock absorber has control unit electrically coupled with step motor.

EFFECT: provision of adjustment of resistance of shock absorber depending on required smoothness, accuracy and operative control within required range owing to adjustment of are of cross section of throttling holes.

1 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to design of trailers and coupler gears. Proposed device contains arch-shaped damping pad to take action of friction device, for instance, pneumatic type, installed on end of draft pole. Damping pad is connected, for instance, by hinge joint with fixed or sufficiently resilient rear part of prime mover to kill transverse and longitudinal angular vibrations. Friction device contains friction shoes pressed to damping pad by pneumatic drive. Pressure force, thus created, changes depending on load of trailer and/or speed of prime mover automatically adapting to damping of hunting.

EFFECT: provision of change of operation of drive depending on pressure in suspension and/or speed of prime mover.

20 cl, 6 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to design of trailers and coupler gears. Proposed device contains arch-shaped damping pad to take action of friction device, for instance, pneumatic type, installed on end of draft pole. Damping pad is connected, for instance, by hinge joint with fixed or sufficiently resilient rear part of prime mover to kill transverse and longitudinal angular vibrations. Friction device contains friction shoes pressed to damping pad by pneumatic drive. Pressure force, thus created, changes depending on load of trailer and/or speed of prime mover automatically adapting to damping of hunting.

EFFECT: provision of change of operation of drive depending on pressure in suspension and/or speed of prime mover.

20 cl, 6 dwg

FIELD: transport engineering; suspensions.

SUBSTANCE: proposed suspension hydraulic shock absorber has hydraulic cylinder, rod with piston, throttling holes made in piston, and compression valve and rebound valves. Sock absorber contains additionally external liquid flow main line secured between upper and lower spaces of hydraulic cylinder, with compression bypass spring valve and rebound bypass spring valve installed in parallel with external main line and device to adjust compression ratio of springs of bypass valves. Said device includes step motor and worms with floating nuts installed in compression and rebound valve housings, worms being mechanically coupled with step motor. Worms with floating nuts are set into rotation by step motor simultaneously, owing to corresponding arrangement of bypass valves, and provide synchronous adjustment of compression ratio of valve springs owing to translational displacements of floating nuts along worms. Shock absorber has control unit electrically coupled with step motor.

EFFECT: provision of adjustment of resistance of shock absorber depending on required smoothness, accuracy and operative control within required range owing to adjustment of are of cross section of throttling holes.

1 dwg

FIELD: automotive industry.

SUBSTANCE: hydraulic shock absorber comprises hydraulic cylinder (1) and rod with piston (2). The piston is provided with throttle openings (3) and receives the relief compression valve (4) and relief delivery valve (5). The shock absorber receives outer pipeline (6) for communication the top and bottom spaces of hydraulic cylinder (1), step motor (11) provided with mechanical drive (12) for control of compression (8) and delivery (10) cock-throttles, and control unit (13) connected with step motor (11). The pipeline receives, connected in parallel, the unit composed of by-pass valve (7) and compression cock-throttle (8) connected in series and unit composed of by-pass valve (9) and delivery cock-throttle (10) connected in series.

EFFECT: improved shock absorbing.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used to control vibrations of damped mass and to stabilise its static position. Said system comprises suspension that incorporates hydraulic engine with double-acting electro hydraulic booster. Hydraulic engine plunger is articulated via flexible element with stabilised mass. Hydraulic engine power cylinder casing is coupled via flexible element with wheel axle or vehicle frame. Said system incorporates controller to generate control law on the basis of preset reference properties of motion and current state of stabilised mass and hydraulic engine plunger. One of controller inputs is connected via acceleration transducer with stabilised mass, while another input is connected via power cylinder casing current collector and double-way rod bars with feedback potentiometre. The latter controls power cylinder plunger positions at every time interval. Controller output is connected with electro hydraulic booster input.

EFFECT: reduced accelerations, higher accuracy of stabilisation.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed active suspension system comprises active suspension element incorporating stator and armature. Stator is secured on vehicle body. Armature is magnetically coupled with stator and can vertically move along the first support system. Note here that armature has rigid coupling with the carriage that moves in the second support system. Carriage is articulated by control tie rod with vehicle wheel. Second support system takes on loads originating at lateral and longitudinal vibrations of wheels.

EFFECT: ruling out of wheel loads on suspension active element.

78 cl, 23 dwg

FIELD: transport.

SUBSTANCE: set of invention relates to automatic control of transport facility chassis elements. Proposed system comprises air-operated regulation mechanism, air pressure source, control unit, pressure pickup, transducer to record magnitudes of mutual arrangement between chassis element and wheel pair. Control unit compares measured magnitude with target magnitude, and system pressure with tolerable pressure, defines if one of two criteria is satisfied for making decision on pressure adjustment to preset level, and adjusts system pressure to first upper limit. Proposed method comprises stages whereat mutual arrangement between chassis element and wheel pair is affected, control signal is generated proceeding from target magnitude, airflow is fed into adjustment mechanism, system pressure parameter is recorded, parameter of mutual arrangement between chassis element and wheel pair is recorded, measured magnitude is compared with target magnitude, and system pressure is compared with tolerable pressure. One of two criteria is checked for satisfaction. If yes, system pressure is adjusted to preset level. System pressure is adjusted to first upper limit if measured magnitude is in the limits of preset range nearby target magnitude before system pressure reaches said first upper limit. Motor transport facility comprises above described system.

EFFECT: power-consuming chassis control.

15 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive suspension with electromagnetic drive. Proposed suspension comprises electromagnetic drive, coupling mechanism and controller. Electromagnetic drive comprises cushioned side assembly, that of uncushioned side, and electromagnetic drive. Coupling mechanism comprises support spring. Controller comprises assembly to define drive target force to allow control said force. Assembly to define drive target force defines said force proceeding from required acting force using first and second transfer function. First transfer function represents that outputting cushioned and uncushioned side assemblies displacement relative to each other with drive actuated. Second transfer function represents that outputting actual acting force between cushioned and uncushioned sections with displacement magnitude loaded in controller.

EFFECT: higher stability and controllability.

8 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive suspension with electromagnetic drive. Suspension system comprises electromagnetic actuator, coupling mechanism and controller. Electromagnetic actuator comprises unit of cushioned section, unit on uncushioned section, screw mechanism, and motor. Coupling mechanism comprises thrust spring to allow jointing float unit and float unit support section. Controller serves to control actuator force. Controller incorporates circuit to control damping the oscillations of cushioned part and that to control relative oscillations.

EFFECT: higher stability and controllability.

15 cl, 22 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Adjustment device is arranged between wheel suspension spring plate 16 displacing in height and automobile body 54, 56. Drive motor 10 interacts via reduction gear stage 34, 36, 40 with rotary adjustment bush 26 to displace said plate 16 of spring 18. Reduction gear stage (34, 36, 40) is installed inside the rotary adjustment bush (26).

EFFECT: decreased sizes.

17 cl, 2 dwg

FIELD: transport.

SUBSTANCE: group of inventions relates to method for lowering dynamic loading of vehicle when moving over the surface, and to vehicles implementing this method. The method consists in the following: the response of vehicle model with various characteristics of shock-absorbing device rigidity and damping to given types of irregularities is measured; the responses are stored in memory unit. Memory unit with model responses is installed in vehicle. Using scanner, surface characteristics in direction of vehicle movement are determined. The characteristics are transmitted to memory unit containing model responses. Surface characteristic is compared with types of surface irregularities contained in the memory unit and with model response to similar surface characteristics. The best version of shock-absorbing device control is selected. The best control version is compared with measured spatial and angular coordinates of vehicle and with their first and second derivatives. Control signal is generated and transmitted to vehicle's shock-absorbing device. A vehicle including such as aircraft contains system which controls vehicle's components according to above mentioned method.

EFFECT: lower overloads of vehicle when it moves over irregular surface.

10 cl, 7 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used to control vibrations of damped mass and to stabilise its static position. Said system comprises suspension that incorporates hydraulic engine with double-acting electro hydraulic booster. Hydraulic engine plunger is articulated via flexible element with stabilised mass. Hydraulic engine power cylinder casing is coupled via flexible element with wheel axle or vehicle frame. Said system incorporates controller to generate control law on the basis of preset reference properties of motion and current state of stabilised mass and hydraulic engine plunger. One of controller inputs is connected via acceleration transducer with stabilised mass, while another input is connected via power cylinder casing current collector and double-way rod bars with feedback potentiometre. The latter controls power cylinder plunger positions at every time interval. Controller output is connected with electro hydraulic booster input.

EFFECT: reduced accelerations, higher accuracy of stabilisation.

1 dwg

FIELD: transportation.

SUBSTANCE: air suspension contains one integrated control valve (1) for supplying compressed air to the air cavity (5) formed between an outer tube (2), a guide tube (3) and a bellow valve (4) connecting them. The control valve (1) with several switching positions can be adjusted by means of an integrated mechanical control element, depending on the height of the air suspension relative to the preset level of the vehicle. The air cavity (5) comprises a compression spring (8) on the end surface located between the upper part (6) of the outer tube (2) and the lower part (7) of the outer tube (2). A lever (9) mechanically connected to the integrated control valve (1) is configured to be actuated by the control protrusion (10) located on the end surface of the tube lower part (7). A stepped characteristic of the supply and/or discharge of air in the air cavity (5) is realized, and in order to activate the lever (9), the control protrusion (10) partially enters the guide tube (3).

EFFECT: accuracy of activation and realisation of a stepped characteristic of the supply and discharge of air in the air cavity are achieved.

9 cl, 3 dwg

FIELD: transportation.

SUBSTANCE: air suspension system has an integrated control valve (4) for supplying compressed air to the air cavity (6). The sealing device is located between the inner edge surface of the guide tube (1) and the outer edge surface of the shock absorber (3) and/or between the inner edge surface of the outer tube (2) and the outer edge surface of the shock absorber (3). The support ring (7) is located at the distal end of the guide tube (1) and/or at the distal end of the outer tube (2). The distal end of the guide tube (1) and/or the distal end of the outer tube (2) comprises a clamping area (8) on the inner edge surface of the support ring (7), which has a larger internal diameter than the surrounding area. The inner diameter increases stepwise, resulting in the formation of an arm (9). The sealing element (10) is located axially between the end surface of the support ring (7) and the arm (9), and an annular washer (11) is positioned between the sealing element (10) and the end surface of the support ring (7).

EFFECT: tightness between the shock absorber and the guide tube, as well as tightness between the shock absorber and the outer tube are ensured.

7 cl, 2 dwg

Dynamic dampener // 2354867

FIELD: mechanical engineering.

SUBSTANCE: invention refers to mechanical engineering, particularly to dampeners of vibrations of mechanical engineering equipment. The dynamic dampener of vibrations consists of a case, divided into three chambers by means of elastic elements in form of membranes and an insertion. The upper and lower chambers are filled with magnetic liquid, while the middle one is filled with air. Systems of channels arranged in the insertion connect the upper and lower chambers. The case of the dampener is enveloped with a coil connected to a control block. From the sensor of vibration acceleration installed on the projecting rod of the insertion signals are transmitted to the control block.

EFFECT: expanding working range of frequency damping and its regulating.

1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to automotive machine building, particularly, to automotive cushioning systems. The proposed shock absorber comprises hydraulic cylinder filled with working fluid and accommodating piston and rod, and hydraulic accumulator. The rod lower part is furnished with radial throttling orifices and spring-loaded control plunger with edge covering aforesaid orifices. The said radial throttling orifices are spaced along the rod length so that the said control plunger jumps the orifices in turn, thus gradually varying the total flow section. The control plunger is fitted in the piston, outside the working fluid flows, and can deviate from its normal position only under gravity.

EFFECT: higher comfort and controllability of vehicle in running over irregular road coat.

3 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building and can be used to control vibrations of damped mass and to stabilise its static position. Said system comprises suspension that incorporates hydraulic engine with double-acting electro hydraulic booster. Hydraulic engine plunger is articulated via flexible element with stabilised mass. Hydraulic engine power cylinder casing is coupled via flexible element with wheel axle or vehicle frame. Said system incorporates controller to generate control law on the basis of preset reference properties of motion and current state of stabilised mass and hydraulic engine plunger. One of controller inputs is connected via acceleration transducer with stabilised mass, while another input is connected via power cylinder casing current collector and double-way rod bars with feedback potentiometre. The latter controls power cylinder plunger positions at every time interval. Controller output is connected with electro hydraulic booster input.

EFFECT: reduced accelerations, higher accuracy of stabilisation.

1 dwg

Up!