Orthogonal double-joint type electric thruster pointing mechanism

Abstract

The invention relates to a mechanism for adjusting the thrust direction of an electric thruster in a spacecraft, in particular to an orthogonal double-joint type electric thruster pointing mechanism. The mechanism comprises a rotating actuator I, a universal joint ring, an electric thruster, an upper rotating frame, a lower fixing frame and a rotating actuator II, the universal joint ring is rotatably installed on the lower fixing frame around the Y axis, the rotating actuator II is arranged on the lower fixing frame, the output end of the rotating actuator II is connected with the universal joint ring, the rotating actuator II is used for driving the universal joint ring to rotate around the Y axis; the upper rotating frame is rotationally connected with the universal joint ring around the X axis, the rotating actuator I is arranged on the upper rotating frame, the output end of the rotating actuator I is connected with the universal joint ring, and the rotating actuator I is used for driving the upper rotating frame to rotate around the X axis; and the electric thruster is arranged on the upper rotating frame. According to the invention, the purpose of adjusting the rotation of the upper support is achieved by using one universal joint ring, and the pointing of the upper rotating frame of the mechanism in any direction within the stroke range can be realized.

Description

technical field [0001] The invention relates to a mechanism for adjusting the thrust direction of an electric thruster in a spacecraft, in particular to an orthogonal double-joint type electric thruster pointing mechanism. Background technique [0002] At present, at home and abroad, the thrust of the thruster is required to maintain the position of the spacecraft in orbit or to change the orbit of the spacecraft. Compared with chemical propulsion, electric propulsion has the advantages of high specific impulse, small disturbance, and low mass. Therefore, at this stage, it is a good method to use electric propulsion technology to control the operation of in-orbit satellites. How to effectively and accurately control the direction of the propulsion force is an important issue to be studied, which requires an electric propulsion pointing mechanism to control the direction of the propulsion force. Most of the electric thrusters currently used are large in size and heavy in wei...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the object of the present invention is to provide an orthogonal double-joint electric thruster pointing mechanism to overcome the problems of large volume and heavy weight in the existing electric propulsion pointing mechanism

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