# Method to search for faulty block in continuous dynamic system

FIELD: information technologies.

SUBSTANCE: previously a reaction of a knowingly good system is registered in the interval at reference points, and integral estimates of output signals of the system are determined repeatedly (simultaneously) for integration parameter values. For this purpose at the moment of test signal supply to the inlet of the system with rated characteristics, simultaneously integration of control system signals is started for parameters of integration in each of the reference points with weights, by supplying of control system signals to the first inlets of the multiplication blocks. Exponential signals for integration blocks are supplied to the second inlets of the multiplication blocks. Output signals of the multiplication blocks are supplied to the inputs of the integration blocks. Integration is completed at the moment of time. Estimates of output signals produced as a result of integration are registered, the number of the system blocks is fixed, elements of topological links of each block within the discrete system for each reference point are determined, elements are determined from many values {-1,0,1}, the value - -1 is defined, if the sign of signal transfer from the output of the i block to the j reference point is negative. The value 0 is determined, if signal transfer from the output of the i block to the j reference point is not available, the value 1 is determined, if the sign of signal transfer from the output of the i block to the j reference point is positive. Then the rated values of the vector of topological links for each block are defined, the system with rated characteristics is replaced with the controlled one. An identical test signal is supplied to the inlet of the system, integral estimates are determined for signals of the controlled system for reference points and for parameters of integration. Deviations of integral estimates of controlled system signals are determined for reference points and parameters of integration from rated values. Rated values of deviations of integral estimates of controlled system signals are determined for parameters of integration, diagnostic criteria are determined with parameters of integration, by the minimum value of the diagnostic criterion, a serial number of a faulty block is determined.

EFFECT: improved noise immunity of the method for diagnostics of continuous systems of automatic control by improvement of defects observability.

1 dwg

The invention relates to the field of control and diagnostics of automatic control systems and their elements.

There is a method of finding a defective block in the dynamic system (Patent for invention №2439648 from 10.01.2012 to application number 2010142159/08(060530), MKI^{6}G05B 23/02, 2012), based on the multiple integration of the output signal of the block with weights_{l}- material constant, l is the number of constants.

The disadvantage of this method is that it uses several models to test deviations of the parameters of the transfer functions of the blocks.

The closest technical solution (prototype) is a way of finding a bad block in a continuous dynamic system (Patent for invention №2439647 from 10.01.2012 to application number 2011100409/08(000540), MKI^{6}G05B 23/02, 2012).

The disadvantage of this method is that it enables the detection of defects with low visibility, that is, has low noise immunity.

Technical problem on which this invention is directed, is to improve the noise immunity of the method of diagnosing a continuous automatic control systems by improving the distinctiveness of defects. This is achieved put the m use multiple calculations of the integral estimates of the dynamic characteristics for several different values of the parameter of integration α_{
1}α_{2}...α_{n}.

This object is achieved in that pre-register response of a known good system f_{j}(t), j=1, 2, ..., k on the interval t∈[0,T_{K}] k control points and repeatedly define (simultaneously) integral evaluation of the output signals F_{j}(α_{l}), j=1, ..., k; l=1, ..., n of the system for n values of integration α_{l}, which at the time of the test signal at the input of the system with nominal characteristics simultaneously begin the integration of the control signals for the n parameters of integration in each of the k control points with weights_{to}obtained by integrating the evaluation of the output signals F_{j}(α_{l}), j=1, ..., k; l=1, ..., n register, register number Blokov system,
define the elements of the topological relationships of each block included in the system for each control point of the P_{ji}, j=1, 2, ..., k; i=1, 2, ..., m, the elements of P_{ji}determine from the set of values {-1,0,1}, -1 determine if the sign signal from the output of the i-th block to the j-th control point is negative, a value of 0 determine if the signal from the output of the i-th block to the j-th control point is missing, a value of 1 to determine if the sign signal from the output of the i-th block to the j-th control point is positive. Then define the normalized values of the vector topological relationships for each block of the ratio

replace the system with a nominal characteristics controlled at the input of the system serves a similar test signal x(t), define the integral evaluation of the signals of the controlled system F_{j}(α_{l}), j=1, ..., k; l=1, ..., n for k control points and n parameters of integration α_{l}determine the deviation integral is the estimated signals of the controlled system for the k control points and n parameters of integration from the nominal values

ΔF_{j}(α_{l})=F_{j}(α_{l})-F_{j}(α_{l}), j=1, ..., k; l=1, ..., n,

define the normalized Delta values of the integral estimates of the signals of the controlled system for the n parameters of the integration ratio

determine diagnostic characteristics for n parameters, the integration ratio

the minimum values of the diagnostic sign determines the ordinal number of the defective block.

Thus, the proposed method of finding the defective block is to perform the following operations.

1. As dynamic systems consider a system consisting of randomly connected dynamic blocks, number of blocks m.

2. Pre-determine the testing time T_{K}≥T_{PP}where T_{PP}- time transition system. Transition time estimate for the nominal values of the parameters of the dynamic system.

3. Define n parameters are multiples of 5/T_{k}multiple signal integration.

4. Record the number of control points k.

5. Pre-determine the elements of the topological relationships of each block included in the system for each control point of the P_{ji}, j=1, 2, ..., k; i=1, 2, ..., m, the elements of P_{ji}determine from the set of values {-1,0,1}, -1 determine if the sign signal from the output of the i-th block to the j-th control point is negative, a value of 0 determine if the signal from the output of the i-th block to the j-th control point is missing, a value of 1 determines ezlink signal from the output of the i-th block to the j-th control point is positive.

6. Define the normalized element values of the vector topological relationships for each block of the ratio

**.**

7. Serves the test signal x(t) (unit step, linearly increasing, rectangular pulse and so on) to the input of the control system with a nominal characteristics. Fundamental limitations on the type of input test the impact of proposed method does not.

8. Record the response of the system f_{j}(t), j=1, 2, ..., k on the interval t∈[0,T_{K}] k control points and determine the integral evaluation of the output signals F_{j}(α_{l}), j=1, ..., k; l=1, ..., n system. To do this, at the time of the test signal to the input of the control system with the nominal characteristics simultaneously begin integration (with n parameters α_{l}) the control signals in each of the k control points with weights_{to}obtained by integrating the evaluation of the output signals F_{j}(α_{l}), j=1, ..., k; l=1, ..., n register.

9. Replace the system with a nominal characteristics controlled. At the input of the system serves a similar test signal x(t).

10. Define the integral evaluation of the signals of the controlled system for the k control points and n parameters of integration F_{j}(α_{l}), j=1, ..., k; l=1, ..., n, carrying out the operations described in paragraph 8 in relation to the controlled system.

11. Determine the deviation of the integral of the estimated signals of the controlled system for the k control points and n parameters of integration from the nominal values

ΔF_{j}(α_{l})=F_{j}(α_{l})-F_{j}(α_{l}), j=1, ..., k; l=1, ..., n.

12. Calculate the normalized values of the variance of the integral of the estimated signals of the controlled system by the formula

**.**

13. Calculate the diagnostic signs of faulty structural unit (with n parameters of integration) by the formula (3).

14. The minimum values of the diagnostic sign determine the defective block.

Consider the implementation of the proposed method of finding the defect for a system structural diagram of which is shown in the drawing (see Fig. Block diagram of the diagnostic object).

The transfer function blocks

**;****;****,**

where the nominal parameter values: T_{1}=5; K_{1}=1; K_{2}=1; T_{2}=1; K_{3}=1; T_{3}=5 C.

When modeling the input signal will use a single speed impact. The control time T_{to}chosen equal to 10 C.

Define the elements of the topological relationships of each block included in the system for each control point of the P_{ji}, j=1, 2, 3; i=1, 2, 3, the sign signal from the output of the first block (1) until the first checkpoint positive, so P_{11}=1, the sign signal from the output of the first unit to the second control point is positive, so P_{21}=1, the sign signal from the output of the first block to the third checkpoint positive, so P_{31}=1, so the vector topological relationships of the first block will be of the form P_{1}=(1,1,1). For the second block (2) sign signal from its output to the first control point is negative, and for the second and third control points is positive, so the vector topological relations for the second block will be of the form P_{2}=(-1,1,1). For the third block (3) vector topological relations will be of the form P_{3}=(-1,-1,1).

Modeling processgpos defects in the first block (in the form of reducing the parameter k_{
1}20%) leads to the calculation of diagnostic features in three dimensions of integration (α_{1}=0.5, α_{2}=0.1 and α_{3}=2.5) according to the formula (3): J_{1}=0.248, J_{2}=0.9372, J_{3}=0.5806. The appearance of the defect: ΔJ=J_{3}-J_{1}=0.3326.

For comparison, see diagnostic signs of a defective block (in the form of reducing the parameter k_{1}20%) with one parameter of integration α=0.5: J_{1}=0.2237; J_{2}=0.9954; J_{3}=0.5093. The appearance of the defect ΔJ=J_{3}-J_{1}=0.2856.

The results show that the actual appearance of finding defects by this method above, therefore, will be higher and the robustness of the method.

The minimum value of the diagnostic sign in all cases correctly points to the defective block.

Thus, the appearance of defects in the implementation of the proposed method is higher than with the implementation of the prototype.

The way of finding a bad block in a continuous dynamic system, based on the fact that record the number of blocks m, forming part of the system, determine the testing time T_{To}≥T_{PP}where T_{PP}the time transient of the system, define the parameter integral transforms of the signals from the relation_{K}]as the dynamic characteristics of the system using integral evaluation of the signals obtained for real values of α Laplace variable, fixed number of k control points in the system, record the reaction of the object of diagnosis and response in a known good system f_{j}(t), j=1, 2, ..., k on the interval t∈[0,T_{K}] k control points that define the integral evaluation of the output signals F_{j}(α), j=1, ..., k serviceable system, which at the time of the test signal at the input of the system with nominal characteristics simultaneously begin the integration of the control signals in each of the k control points with weights_{to}obtained by integrating the evaluation of the output signals F_{j}(α), j=1, ..., k register, replace the system with a nominal characteristics controlled at the input of the system serves a similar test signal x(t), define the integral evaluation of the signals of the controlled system for the k control points F_{j}(α), j=1, ..., k for the parameter α determines the deviation of the integral of the estimated signals of the controlled system for the k control points from the nominal values, determine the normalized Delta values of the integral estimates of the signals of the controlled system, determine the elements of the topological relationships of each block included in the system for each control point of the P_{ji}, j=1, ..., k; i=1, ..., m, the elements of P_{ji}determine from the set of values {-1,0,1}, -1 determine if the sign signal from the output of the i-th block to the j-th control point is negative, a value of 0 determine if the signal from the output of the i-th block to the j-th control point is missing, the value of l determines if the sign signal from the output of the i-th block to the j-th control point is positive, determine the normalized element values vectorautoregression links for each block of the ratio of_{1}multiples of_{1}determine the integral evaluation of the output signals F_{j}(α_{1}), j=1, ..., k; l=1, ..., n of the system, which at the time of the test signal at the input of the system with nominal characteristics simultaneously begin the integration of the control signals in each of the k control points for n parameters integration with weights_{to}obtained by integrating the evaluation of the output signals F_{j}(α_{1}), j=1, ..., k; l=1, ..., n register, define the integral evaluation of the signals of the controlled system for the k control points and n parameters of integration F_{j}(α_{1}), j=1, ..., k; l=1, ..., n, define the deviation of the integral of the estimated signals of the controlled system for the k control points and n parameters of integration from the nominal values

ΔF_{j}(α_{1})=F_{j}(α_{1})-F_{j}(α_{1}), j=1, ..., k; l=1, ..., n,

define the normalized Delta values of the integral estimates of the signals of the controlled system from the relation:

determine the diagnostic signs of the ratios:

**Same patents:**

FIELD: electrical engineering.

SUBSTANCE: in the switching device with "-" and "+" feed bars and n of single-type reserved relay cells consisting of four relays and four isolation diodes, the first, second and third switchable "+" feed bars, the fourth switchable "+" feed bar is introduced with four remote switches with two normally closed contacts, five current sensors, controller. The secondary outputs of windings in each cell are connected respectively to the first, second, third and fourth switchable "+" feed bar; the first, second, third and fourth current sensor is installed respectively at first, second, third and fourth switchable "+" feed bar through which the first normally closed contacts of the first, second, third and fourth remote switch is connected with common "+" feed bar while the fifth sensor is installed at switchable "-" feed bar. Outputs of current sensors are connected to data inputs of the controller which signal inputs trough the second normally closed contacts respectively of the first, second, third and fourth remote switch are connected to the common signal input of the controller.

EFFECT: fault monitoring of the relay in a cell in process of manufacturing and operation.

1 dwg

FIELD: information technology.

SUBSTANCE: apparatus has a synchronisation unit 1, an integrated unit 2, a switch 3, units for controlling and linearising transfer characteristics of multichannel converters 4, counters for counting the number of times a fault detection subunit 5 is switched, a control unit 6, memory units 7 and 8. The output of the synchronisation unit is connected to the input of an interfacing unit, and a multidimensional sequence generator is in form of a multichannel device of a matrix structure with feedback, and the data output of the interfacing unit fully conforms to data connections, and its data output is connected to the input of the switch.

EFFECT: high accuracy of simulation by combining control of transfer characteristics and statistical estimation of the frequency index of the effect of the set of destabilising factors.

2 dwg

FIELD: process engineering.

SUBSTANCE: method of defining parameter setimate inherent in segment related with engineering process circuit of control over operation of control devices, say, valves. It comprises generating signal data corresponding to signal from engineering process control circuit, storing said data, dividing it into segments of signals, and executing statistic analysis at the first segment of data segments selected from said data segments to generate first estimate of parameters inherent in said segment.

EFFECT: higher accuracy of estimation.

20 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: diagnostic tests are created when testing electronic devices. By executing a test, the computational testing process is realised and data packets are generated in an input/output device. The input/output device generates signals at outputs; the control equipment performs display and control of the computational process. The computational process is executed by the control equipment, and specifically generates diagnostic tests, executes the computational testing process and sends data packets to the input/output device by transit through a computational unit having software which realises communication between the control equipment and the input/output device. Information from the control equipment is recorded in the input/output device by the control equipment generating a packet in dashboard interface protocol format with an information recording feature, from which F packets are generated in highway interface protocol format, which are transmitted to the computational unit which, upon receiving the F packets, generates a packet in dashboard interface protocol format and sends said packet to the input/output device, thereby recording information.

EFFECT: minimising testing time and labour input, simple procedure for controlling, monitoring, analysing and processing information during tests.

2 dwg

FIELD: information technology.

SUBSTANCE: disclosed is a method for preliminary assessment of quality of diagnostic tests, consisting in that, based on the description of internal parts of the diagnosed article, an equivalent standard model of connections is formed; for the obtained standard model of the diagnosed article, combinations of input test signals are formed; for each combination of input test signals, parameters of combinations of output signals are determined, wherein at the inputs of the obtained standard model of the diagnosed article, corresponding combinations of input signals are given in a corresponding sequence given in the assessed diagnostic test; for each combination of given input signals, except the first, parameters of combinations of response signals at the outputs of the standard model of the diagnosed article and in characteristic intermediate points between standard models of component parts of the article are determined and, by comparing response signals obtained for the previous combination of given input signals, change in values of response signals is determined; preliminary efficiency of the diagnostic test is calculated; a preliminary decision on sufficient quality of the assessed diagnostic test is made, as a result of which the assessed diagnostic test is sent for refinement or for experimental checking.

EFFECT: shorter time for diagnosing engineering systems.

5 dwg, 1 tbl

FIELD: electrical engineering.

SUBSTANCE: according to the invention, the control system contains at least one hood drive (actuated by at least one electric motor), electric motor and drive controls, an electric circuit including several electric components, multiple gauges intended for measurement of, respectively, the characteristic value of the electric circuit electric component or group of electric components, fault detectors intended to detect a fault at the electric circuit electric component level when the measured characteristic value pertaining to the component concerned exceeds the preset value of falls within a certain preset range of values.

EFFECT: control system fault robustness enhancement.

9 cl, 3 dwg

FIELD: physics.

SUBSTANCE: invention relates to automated test and control equipment and can be used as apparatus for checking operating capacity of multichannel communication systems and apparatus for controlling air-launched weapons of aircraft and their component parts during preflight preparation of the aircraft. The automated test and control equipment includes: a multichannel comparator unit, a virtual reference, a normalisation unit, a multiplexer, a control object, a switch, an output signal conditioner, a control unit, a multichannel comparator unit, a storage unit for reference sets, a storage unit for control results and an operability indicator.

EFFECT: shorter inspection time due to less equipment used in the process and high automation of inspection.

4 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: first a logarithmic frequency characteristic is taken in a section of a circuit of an electromechanical and power part of a drive by means of supply of a harmonic signal to its inlet, for instance, from an analyser of frequency characteristics, and then a zero signal is set to the gear inlet, an outlet link of the gear is loaded with a harmonic force, for instance, with a loader, to the inlet of which a harmonic signal is sent from the second analyser of frequency characteristics, and the logarithmic frequency characteristic is taken in the electric part of the control system. Using the sum of logarithmic frequency characteristics, they produce a logarithmic frequency characteristic of an open circuit of a drive, and on its basis they determine margins of gear stability by amplitude and phase. Also a device is proposed to determine margins of steering gear stability comprising two analysers of frequency characteristics, of the loader and the gear.

EFFECT: experimental detection of margins of stability of steering gears with a multi-circuit control system.

2 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: channel (500) is configured and arranged to be rigidly mounted (401) to equipment (100) meant for temporary monitoring. At least one element (800) for connecting with a sensor is movably gripped (402) inside this channel and a sensor assembly (1000) (comprising a plurality of photosensitive receptors (1001) which are arranged in form of a structure which corresponds to signal lights which make up part of the monitored equipment) is pressed (404) to the element for connecting with the sensor by a fixation element (1200) so as to retain the sensor assembly in place with respect to the monitored equipment. Owing to this approach, the sensor assembly (in combination with the element for connecting with the sensor) can be moved (403) along the channel to a selected position with respect to at least one of the signal lights and then retained in that selected position by the fixation element.

EFFECT: reliable and efficient connection of equipment with the corresponding apparatus for gathering diagnostic data over a considerably shorter period of time.

21 cl, 14 dwg

FIELD: information technology.

SUBSTANCE: reaction of a good, time-discrete system is recorded first; integral estimates of output signals of the discrete system are determined; the number of analysed single and multiple defects of units is recorded; integral estimates of signals of the model for each control point are determined; deviations of integral estimates of signals of the discrete model are determined; standardised values of deviations of integral estimates of signals of the discrete model are determined; the system with nominal characteristics is replaced with the controlled system; an analogue test signal is transmitted to the input of the system; integral estimates of signals of the controlled discrete signals are determined for control points for the discrete integral transformation parameter; deviations of the integral estimates of signals of the controlled discrete system are determined for control points from the nominal values; standardised values of deviations of integral estimates of signals of the controlled discrete system are determined from the ratio; diagnostic features are determined from the ratio; the index number of the single defect of the unit or a combination of defects of units is determined from the maximum value of the diagnostic feature.

EFFECT: broader functional capabilities of the method of finding one or several faulty units at once in a dynamic system with arbitrary connection thereof, and lower computational costs associated with use of a simpler diagnostic feature.

1 dwg

FIELD: automatic control, applicable in systems with excessive quality of transducers, for example, accelerometers, a failure of one of which should not result in a failure of the control system.

SUBSTANCE: the method is based on a periodic check-up of relation between the measured parameters of motion characterizing the correct operation of the transducers, fixation of the moment of failure of the relation, comparison of the readings of the transducers at this moment and at the moment preceding the moment of disturbance of the relation, and determination of the failed transducer by the results of the comparison.

EFFECT: expanded functional potentialities due to possibility of determination of the failed transducer in any excess system.

1 dwg

FIELD: measuring technologies.

SUBSTANCE: method includes setting tolerance for controlled parameter, measuring physical value, associated with said controlled parameter, with numeric characteristic of its value, then measured value is compared to its tolerated values (tolerances for controlled parameter), and decision concerning level of match of measurement results to tolerances for parameter is taken, when determining tolerance for controlled parameter an affiliation function is set for phrase "parameter on basis of measurements in tolerance", and during taking of decision trustworthiness of phrase is evaluated, expressed in non-precise measure, as value of affiliation function, matching value of measured parameter.

EFFECT: higher trustworthiness.

2 dwg

FIELD: measuring and monitoring technique, possibly monitoring of different objects.

SUBSTANCE: system includes control unit, unit for calling testing programs, coupling unit, measuring unit, test stimulation unit, power sources, unit for distributing signals, memory unit, N matching units, N testing program units. Each testing-program unit has evaluation circuit and two memory devices.

EFFECT: lowered volume of equipment, simplified organization of monitoring process and development of software.

1 dwg

FIELD: electric measurements, applicable in check-up of tram and trolleybus electric apparatuses in the process of manufacture and in service.

SUBSTANCE: current in the current source is fed to the current winding of the current relay from the rectifier via a key, choke, shunt. The device uses a pulse-width modulator that controls the keys, slowly varying voltage is applied to the modulating input of the pulse-width modulator that is preliminarily modulated by the rectifier ripple voltage. Besides, use is made of a sample-release circuit of operate (release) currents and voltages. The signals from these circuits are fed to indicators via analog-to-digital converters.

EFFECT: reduced error of determination of operate and release current and voltage relays, enhanced capacity of check-up in the device due to reduced ripples of the source of smoothly varying current.

2 cl, 4 dwg

FIELD: mechanical engineering.

SUBSTANCE: method comprises determining variations of the parameter during acceleration and deceleration of the actuator. The device comprises generator and OR-NOT unit, the inputs of which are connected with the outputs of the relay. The output of the relay is connected with the input of the generator.

EFFECT: enhanced accuracy of the method and simplified device.

3 dwg

**FIELD: instrumentation engineering; serviceability check of multichannel communication systems.**

**SUBSTANCE: proposed equipment includes personal computer, multiplexing switch, circuit checkup unit, control unit, multichannel comparison unit, virtual standard, switching unit, output signal shaper, multiplexer, and normalizing unit that has voltage meter and circuit meter.**

**EFFECT: enlarged functional capabilities of device.**

**3 cl, 1 dwg**

FIELD: measuring equipment.

SUBSTANCE: as a source of standard signal not separate generator of test signal according to known code structure is used, but a component of modem, to provide for substantial simplification of process under unfavorable conditions.

EFFECT: higher efficiency.

1 dwg

FIELD: automated control and diagnostics systems.

SUBSTANCE: first variant of complex includes control computer, mating block, commutator, local data exchange main, tests forming block, logical analyzer, signature analyzer, synchronization block, digital oscillographs block, special form signals programmed generators block, programmed power-sources block. Second variant of complex additionally includes block for forming high-frequency test signals and block for measuring high-frequency signals.

EFFECT: broader functional capabilities, higher efficiency, higher reliability.

2 cl, 2 dwg

FIELD: automatic control.

SUBSTANCE: device has first and second analog-digital converters, first and second coefficients forming blocks, first and second multiplication blocks, counter, first and second integrator, control effect forming device, division block, buffer and registering block, while coefficients forming blocks are made in form of digital filters and all remaining blocks of device are made digital.

EFFECT: higher precision, higher resistance to interference.

1 dwg

FIELD: technical systems diagnostics.

SUBSTANCE: method includes forming an equivalent standard model of connections, gaps of which include standard models of composition parts of current type of products, combinations of input signals are set in certain order, parameters of response on outputs of standard model of diagnosed product are determined as well as in characteristic intermediate points between standard models of composition parts of product, values of response parameters together with parameters of test input signals are recorded in database, after which process is repeated until fully searching all states of standard model.

EFFECT: possible forming of tests in absence of standard samples of control subject for different classes of products in different areas.

4 dwg