RU2684229C1 - Correction engine thrust vector control device - Google Patents

Abstract

FIELD: astronautics.

SUBSTANCE: invention relates to the space equipment, in particular, to included into the spacecraft (SC) correction unit rotation systems, and can be used in various kinds of devices, as well as a turntable for the ground-based devices. Correction engine thrust vector control device consists of the upper interface board 1 and the lower interface board 2 with actuators 3 installed thereon, which rotate mounted on the top 7 and bottom 7 rotary elements gears 4. Rotary elements 7 are interconnected by bearings 6. Upper 1 and lower 2 interface boards are interconnected by the universal joint 5. Turning point 8 coincides with the rotating elements interface plane.

EFFECT: enabling the correction engine thrust vector control in two planes, reduction of disturbing moments arising due to deviation of the thrust vector from the SC center of mass.

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Description

The device relates to space technology, to the rotation systems of the correction unit as part of the spacecraft (SC) and can be used in vehicles of various types.

The choice of the method of installing the correction blocks on the spacecraft is one of the important design stages, the further operation of the spacecraft in orbit depends on the accuracy of the thrust vector exhibition at the center of mass. A change in the center of mass of the spacecraft in the process of fuel production leads to an increase in disturbing moments, and, consequently, to an increase in the cost of their compensation.

Known rotary support device for positioning the antenna (KR 101429001 B1), containing actuators controlling two elevation and azimuth angles by which the antennas are guided. The disadvantage of the invention is that the design of the device cannot be used in space due to the overall characteristics.

Known rotary support device containing an azimuthal rotation drive, which is a vertical column, all of the drive elements of which are located inside this column (RU 2359372). A disadvantage of the known device is the small range of applications, this design of the device is not applicable in outer space, can only be used for terrestrial systems.

A device is known which is adopted as a prototype of the invention, comprising a reciprocating drive (US 6,820,531 B1), implemented on the basis of a linear electric motor, the functions of which in this device are rotary drives. Due to the linear drive, the ball bearing of the carriage is shifted, changing the terrain angle in the plane of the platform. The rotation of the platform determines the azimuth angle. The disadvantage of this design is the power supply to the rotating elements.

The objective of the invention is to combine the functions of the correction of the orbit of the spacecraft and the creation of torques relative to the center of mass, by using the properties of the developed structure.

This problem is solved by developing the design of the control device for the thrust vector of the correction engine, made by the type of slewing gear, which changes the azimuth and terrain angles and contains rotation drives. Drives connected by cardan coupling rotate the rotary elements relative to the upper and lower interface boards. The cardan coupling pivot point coincides with the coupling plane of the pivoting elements, in which one of the three thrust bearings is located, the other two are located in the coupling planes of the pivoting elements with the upper and lower interface boards, which allows rotation to change the azimuth and terrain angles, when they are combined, or opposite rotation respectively.

The technical result achieved by the invention is:

- a controlled change in the slope in two planes of the correction engine relative to the landing plane;

- reduction of disturbing moments that arise due to deviation of the thrust vector from the center of mass of the spacecraft;

- improving accuracy in controlling the angle of inclination of the correction unit. The proposed device is illustrated by drawings, which show:

- in FIG. 1 - prototype of a rotary device;

- in FIG. 2 - sectional rotary device;

The thrust vector control device of the correction engine includes an upper interface board 1 located in the upper part of the structure and serving as the basis for the correction engine. In the lower part of the device design is located the lower interface board 2 intended for connection with the seat.

Drives 3, in the amount of two pieces, are located in mutually perpendicular planes, to avoid collisions between them during operation of the device and each drive is connected to the top 1 and bottom 2 of the interface board, respectively. Gears 4 in the amount of two pieces are installed in the upper 1 and lower 2 of the interface board, respectively, and are in rigid connection with the upper 7 and lower 7 rotary element.

A cardan shaft 5 is located in the central part of the device and connects the upper 1 and lower 2 interface boards, designed to prevent rotation of the upper interface board 1 relative to the lower interface board 2. This cardan coupling prevents rotation of the upper interface board 1 relative to the lower interface board 2, which prevents jamming mechanism. The rotary system of the device consists of three bearings 6 located in the upper, lower and central parts of the device and combining the upper and lower rotary element 7 with the upper 1 and lower 2 interface boards into a rotary system. Bearings 6 rotate independently of each other. The pivot point 8 is located at the intersection of the axes of the driveshaft 5 and coincides with the plane of the bearing 6 located in the central part of the device.

The operation of the device is as follows.

When the drives 3 are working, the gears 4 rotate either in one direction or in different directions with equal angular velocity.

When the gears 4 rotate in one direction, the direction of the inclination plane changes, the azimuth angle of the upper interface board 1 changes with the same angle of inclination of the terrain. When the gears 4 rotate in different directions, a controlled inclination of the upper interface board 1 relative to the lower interface board 2 occurs, the terrain angle changes with the direction of the tilt plane unchanged.

Claims (1)

The control engine thrust vector control device, made as a slewing rotary device that changes azimuth and terrain angles and contains rotation drives, characterized in that the drives connected to each other by cardan coupling rotate the rotary elements relative to the upper and lower interface boards, the cardan pivot point connection coincides with the plane of conjugation of the rotary elements, in which one of the three thrust bearings is located, the other two are located in the plane of conjugation of the rotary elements with erhney and lower interface board that allows for the rotation of change of azimuth angles and areas in their joint or counter-rotating respectively.

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