Map-board for selection of object for observation from orbital spacecraft

FIELD: transportation, astronautics.

SUBSTANCE: map-board for selection of object for observation from orbital spacecraft (SC) includes flexible tape with two copies of planet surface map applied on it with aligning the Equator end point of the first map copy with the Equator start point of the second map copy, device providing map tape movement from two spaced and secured in parallel shafts. At that, the tape is looped and located on shafts with possibility of its circular motion along equator line of the maps. Additionally following is introduced: translucent tape with the image of continuous line of route for at least three sequential aircraft orbit passes, device providing movement of the tape with image of orbit along the tape with maps from two spaced and secured in parallel shafts and device for synchronisation of movement of the tape with maps and the tape with orbit image. At that, the tape with orbit image is looped and located on shafts of device providing movement of the tape with orbit image with possibility of its circular movement along equator line of the maps. Length of the tape with orbit image is made equal to overall length of represented orbit passes as measured along the equator direction, length of the tape with maps is made equal to total length of equators of plotted on the tape maps, and width of the tape with orbit image and width of the tape with maps are made in the ratio equal to ratio of orbit inclination angle to 90°, at that diameter of shafts of devices providing movement of the tape with orbit image is made equal to diameter of shafts of device providing movement of the tape with maps and constitutes value not exceeding one-fourth of difference between length of the tape with orbit image and length of the tape with maps.

EFFECT: map-board functionality enhancement due to providing of representation on the map-board previous and consequent orbit passes of aircraft.

3 dwg

 

The invention relates to the field of space technology and can be used to identify and select objects on Board an orbiting SPACECRAFT), moving in a near-circular orbit.

Known maps of the earth's surface: [1] communalisation map of the mission control Center (MCC) and maps of the sky [2], which can be used to identify and select geophysical and astronomical objects for observations performed with the AC. The lack of maps is that they do not have graphical information about the orbit of the SPACECRAFT.

The closest analogues adopted for the prototype, is a tablet for the identification and selection of objects geophysical observations aboard orbital space stations [3], which contains two copies of a map of the earth surface caused on the basis of (a flexible tape, a translucent plate with the image of a curve of the track loop orbit, installed above the ribbon with the card, and the device providing movement of the tape with the card along the plate with the image of the orbit.

The shape of the curve lines round the orbit of the SPACECRAFT is determined by the inclination and height of the orbit and associated circulation period of the SPACECRAFT around the Earth. While the device providing movement of the tape with the card along the plate with the image of the orbit is made of d is wow posted and bonded in parallel between the shafts, with maps printed on the tape with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card and tape the card is made of a closed and tight on the shaft with a circular movement along the line of the equator cards.

Tablet [3] is presented in figure 1. This tablet is used in RSC Energia and the Russian MCC for planning geophysical observations from the orbiting space station.

Working with the tablet as follows.

With the help of the device providing movement of the tape with the card along the plate with the image of the orbit connecting point of the equator of the map corresponding to the longitude of the ascending node of the considered orbits the orbit, with the point of ascending node of orbit round, depicted on the plate. This is depicted on the translucent plate curve line of the track loop orbit shows on a map the location of the tracks of this loop that allows you to define and select a point of the surface for observation at this stage orbit.

To map other coils of the orbit (and the General case, the next and previous), you must calculate the longitude of the ascending node of the new round (if we are interested in the next round, the longitude of the ascending node can be considered with the equator of the map in which the end point of the track of the current turn) and repeat all the operations tablet first. For this purpose it is also possible drawing on a translucent plate images of a certain number of consecutive turns of the orbit with the appropriate signatures and designations. For example, on the tablet prototype is presented in figure 1, the plate with the orbit additionally marked half later (with respect to the considered current) loop orbit. But the application of additional curved lines and symbols on a translucent plate, first, creates interference to the user for reading information from the card, and secondly, creating interference to identify themselves images of tracks different orbits between them.

Thus, the tablet is adopted for the prototype, has a major drawback - it is not possible without additional calculations and constructions and without compromising quality read from the map information to display on a map the planet's surface (in the case described tablet, taken as a prototype, is the earth's surface) tracks preceding and following turns orbit.

The task of the proposed device is to enhance the functionality of the tablet by providing a display on the tablet of upstream and downstream coils orbit.

This object is achieved in that the device for selection of a monitoring object with the orbital space is a mini device, including a flexible tape coated with two copies of the map of the planet's surface with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card, the device providing movement of the tape with cards from two spaced apart and fastened together in parallel between the shafts, while the tape is made of closed and placed on the shafts with circular movements along the line of equatoral cards, additionally introduced flexible translucent tape with the image of the continuous lines are not less than three consecutive orbits the orbit of the spacecraft, the device providing movement of the tape with the image of the orbit along the tape with cards from two spaced apart and bonded in parallel between a shaft and a timing unit of movement of the tape with the cards and tape to the image of the orbit, and the ribbon with the image of the orbit is made closed and placed on the shafts of the device providing movement of the tape with the image of the orbit with the possibility of its circular movement along the line of equatoral cards, the length of the tape with the image of the orbit is made equal to the total length of the depicted orbits the orbit, measured along the direction of the equator, the length of the tape with the cards is made equal to the total length of equatoral applied to the ribbon cards, and the width of the tape image is available orbit and the width of the ribbon with maps made in respect of, equal to the ratio of the inclination angle of the orbit to the 90°and the diameter of the shaft of the device providing movement of the tape with the image of the orbit is made equal to the diameter of the shafts of the device provide moving tape with maps and amounts to not more than a quarter of the difference between the length of the tape with the image of the orbit and the length of the tape with the cards.

The tablet is illustrated by drawings. Given: figure 1 - tablet-prototype, figure 2 - design of the proposed tablet, figure 3 is a diagram illustrating the selection of the size of the shaft diameter devices provide moving tapes. In figure 2, which presents the proposed design of the tablet, introduced the notation:

1 - flexible strip maps;

2 - shaft devices provide moving tape with maps.

3 - axis shaft (2);

4 - structural elements, fastening the axis of the shafts (2);

5 - flexible translucent tape with the image of the orbit;

6 - shaft devices provide moving tape with the image of the orbit;

7 - axis shaft (6);

8 - elements of construction, fastening the axis of the shafts (2) and (6);

9 - belt transmission of rotation between the shaft (2) and (6);

10 - line image orbit;

11 - projection line equatoral cards to the ribbon with the image of the orbit;

12 - point ascending nodes depicted orbits the orbit.

The device providing displaced which I tape to the image of the orbit along the tape with cards made of two spaced apart and fastened together in parallel between a shaft (6) and structural elements (8), fastening the axis of the shafts (2) and (6) between them. While the diameters of the shafts (2) and (6) both devices provide moving tapes are made equal.

Device synchronization move tapes made in the form of a belt rotation arranged on the shafts devices provide moving tapes. This belt drive (9) transmits rotation between the shaft (2) and (6), and synchronization of the movement placed on the shafts of the tapes (1) and (5) ensures equality of shaft diameters. When the shaft (2) and (6) are made extra long and the size of the elongation is not less than the width of the belt - so that the shafts were needed additional space to accommodate this belt (see figure 2).

When working with the tablet you want to use ("on") and not ("off") device synchronization move tapes. This possibility is provided by the fact that this device is implemented in the form of a belt (9), are removable.

The length of the tape with the image of the orbit is equal to

where Svlinear size of one revolution of the orbit, measured in linear units along the equator of the card;

n - number of images of the orbits of the orbit.

Belt length cards equal to

where Sethe Equatorial length scale d is got one copy of the map in the range [0,2π ]measured in linear units.

In this case n is chosen minimal, satisfying the condition

and in which the value of S1larger values of S2.

Figure 3 explaining the choice of the size of the shaft diameter devices provide moving tapes, additionally indicated:

L1- the distance between the axes of the shafts (6);

L2- the distance between the axes of the shafts (2);

R1is the radius of the shaft (6);

R2is the radius of the shaft (2).

In order for the tape with the orbit (5) covered the tape with the cards (1) requires that the shaft (2) is located between the shafts (6), which corresponds to the condition (see figure 3):

The length of the strips Sjcalculated for values of Lj, Rjaccording to the formula:

Since the diameter (and radius) of all rolls equal to:

the condition (4), taking into account the relations (5), becomes:

where D=2R is the diameter of the shafts.

Note that the curve line image of the route round the orbit captures the area maps of the planet's surface in the range of latitude [-i, i], where i is the angle of inclination orbit (assume that the value of the inclination angle of the orbit of the SPACECRAFT is positive). As is the size of the map in latitude corresponds to the interval of latitude [-90° , 90°], the width of the tape to the image of the orbit must be not less than the width of the tape with maps, multiplied by a factor equal to the ratio of i to the 90°. Given that the excess width of the translucent tape with the image of the orbit may cause inconvenience for reading information from the card, located under the tape, then the tape runs most narrow - strictly located in the interval of latitude maps [i, i]. This condition corresponds to the execution of the width of the tape with the image of the orbit of W1and the width of the tape with maps W2regarding equal to the angle of orbital inclination i to the 90°:

Working with the tablet as follows. In the initial state of the tablet transfer belt (9) is removed. The rotating shaft (2) devices provide moving tape (1), combine the point of the equator of the map corresponding to the longitude of the ascending node of the considered orbits orbits, with one of the points (12) - point ascending node is depicted on the tape (5) spiral orbit. This is depicted in translucent ribbon (5) a curve of the track orbits orbits (10) shows the maps of the ribbon (1) the location of the track in question orbits orbit.

Next, use the device synchronization move tapes (1) and (5) by placing on the shafts (2) and (), belt (9). Then, when the rotation shaft (2) will synchronously rotate the shaft (6) and simultaneously to move the parts of the tapes (1) and (5)located above the region in the interval between the axes (3) of the shafts (2). The rotating shaft (2) in the directions along and against the direction of rotation-clockwise, the resulting display on the maps of the ribbon (1) the location of the line route turns (10)corresponding to one orbit of the SPACECRAFT prior to and subsequent to the current consideration by the wind.

Describe the technical effect of the present invention. The proposed device extends the functionality of the tablet-prototype by providing a display upstream and downstream coils orbit. The technical result is achieved due to the introduction of flexible translucent tape with the image of the continuous lines are several consecutive orbits orbit, the device providing movement of the tape and device synchronization of movement of the tape, while the length of the tape and the diameters of the shafts devices provide moving tapes made of the proposed dimensions.

LITERATURE

1. Votyakov A.A. Theoretical geography-3. Map of a flat earth. - M: Sofia, 2002.

2. Map of the starry sky with the zodiac constellations. - M: DI EM BI, 2004.

3. Map tablet 17K-7988. RSC "Energia".

The tablet to select the object of observation from the orbital to the economic system, including a flexible tape coated with two copies of the map of the planet's surface with the combined end point of the equator the first instance of the map with the starting point of the equator of the second copy of the card, the device providing movement of the tape with cards from two spaced apart and fastened together in parallel between the shafts, while the tape is made of closed and placed on the shafts with circular movements along the line of equatoral cards, characterized in that it further introduced a flexible translucent tape with the image of the continuous lines are not less than three consecutive orbits the orbit of the spacecraft, the device providing movement of the tape with the image of the orbit along the tape with the cards of the two spaced and bonded in parallel between a shaft and a timing unit of movement of the tape with the cards and tape to the image of the orbit, and the ribbon with the image of the orbit is made closed and placed on the shafts of the device providing movement of the tape with the image of the orbit with the possibility of its circular movement along the line of equatoral cards, the length of the tape with the image of the orbit is made equal to the total length of the depicted orbits the orbit, measured along the direction of the equator, the length of the tape with the cards is made equal to the total length of equatoral applied to the ribbon cards, the width of the tape with the image of the orbit and the width of the ribbon with maps made in respect of, equal to the ratio of the inclination angle of the orbit to the 90°and the diameter of the shaft of the device providing movement of the tape with the image of the orbit is made equal to the diameter of the shafts of the device provide moving tape with maps and amounts to not more than a quarter of the difference between the length of the tape with the image of the orbit and the length of the tape with the cards.



 

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EFFECT: increased number of performed tasks, expanded capabilities of method application environment for any orbits, reduced number of measuring devices and mass and size characteristics of onboard system for controlling a spacecraft.

2 dwg

Sun attitude pickup // 2308005

FIELD: measuring equipment, applicable for determination of the Sun angular coordinates in the spacecraft coordinate system.

SUBSTANCE: the Sun attitude pickup has an optical system made in the form of a wide-angle lens including an inlet and outlet plano-convex lenses with a diaphragm placed between them, an optical element is positioned in its holes, matrix photodetector, and a unit for processing of information and computation of coordinates. The refractive indices of the optical components are selected proceeding from the relation: n1≥n2<n3, where n1 - the refractive index of the inlet plano-convex lens; n2 - the refractive index of the optical element; n3 - the refractive index of the outlet plano-convex lens.

EFFECT: obtained information in a wide angular field with a high precision.

3 cl, 1 dwg

FIELD: measurement technology.

SUBSTANCE: method can be used in moving objects' spatial orientation systems. Before beginning of movement of object, the coordinate system is chosen being comfortable for observer. Three stars are selected, along directions of which stars the speeds have to be measured and their angular coordinates are measured. After movement starts, current values of linear velocity are measured on the base of directions of navigating stars. Changes in linear velocity are calculated from directions of navigating stars, which are changes are caused by rotation of object, and basic components of angular speed vector are determined from directions of navigating stars.

EFFECT: improved precision of measurement.

FIELD: instrument engineering.

SUBSTANCE: device has optical spectrum filter, slit mask, multi-element photo-sensitive detector, threshold elements, photo-detector register, counter, output register, clock pulse generator. Multi-element photo-sensitive detector consists of elementary photo-detectors placed behind one another along quadratic curve. Normal lines to sensitive areas of each elementary photo-detector and quadratic curve lie in same plane.

EFFECT: higher effectiveness and efficiency.

1 dwg

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