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Attitude joint takeover control method for non-cooperative targets in space using tether thrusters

A non-cooperative target and control method technology, applied in the field of space non-cooperative target posture joint takeover control

Active Publication Date: 2018-10-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of attitude takeover control of space non-cooperative target stars, and provide a joint takeover control method for space non-cooperative target attitude using tether thrusters

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  • Attitude joint takeover control method for non-cooperative targets in space using tether thrusters
  • Attitude joint takeover control method for non-cooperative targets in space using tether thrusters
  • Attitude joint takeover control method for non-cooperative targets in space using tether thrusters

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Embodiment Construction

[0088] The present invention is described in further detail below in conjunction with accompanying drawing:

[0089] see Figure 1-Figure 3 , the present invention utilizes the joint takeover control method of space non-cooperative target attitude of tether thruster, comprises the following steps:

[0090] Step 1: Establish a space non-cooperative target star attitude takeover control model

[0091] Such as figure 1 As shown, 1 is the space non-cooperative target star, 2 is the operating mechanism of the space tethered robot, and 3 is the tether of the space tethered robot. o T is the center of mass of the space non-cooperative target star, O T x T Y T Z T is the target star system, O G is the center of mass of the operating mechanism, O G x G Y G Z G For the operating mechanism system, O C It is the connection point of the tether and the operating mechanism. To simplify the modeling process, it is assumed that the coordinate axes of the two coordinate systems ar...

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Abstract

The invention discloses a space non-cooperative target attitude joint takeover control method utilizing tether thrusters. The Space non-cooperative target attitude joint takeover control method comprises the steps of: generating an error instruction according to a control instruction and a state measured value by adopting a formula, updating part of parameters of a controller online in real time, and then generating a pseudo control quantity (control torque) by utilizing an attitude self-adaptive control law; converting an allocation problem of the control quantity into a robust optimization problem, converting the robust optimization problem into a conic quadratic optimization problem, solving the conic quadratic optimization problem by adopting an interior point method to obtain real control quantities (thrust and tension); and finally driving 12 thrusters and tether tension, and achieving attitude joint takeover control of a non-cooperative target.

Description

【Technical field】 [0001] The invention belongs to the field of attitude control of spacecraft, and relates to a joint takeover control method of a space non-cooperative target attitude by using a tether thruster. 【Background technique】 [0002] Takeover control refers to the use of the attitude-orbit control system to take over the attitude-orbit control system of the target spacecraft after the operating mechanism of the serving spacecraft forms a fixed connection with the target spacecraft to realize its attitude-orbit control. With the development of space technology, on-orbit service has received more and more attention. For satellites that are stranded in abandoned orbits, satellites that fail due to attitude rollover, and satellites that cannot work normally due to incorrect attitude pointing, if the service spacecraft can be used to take over their attitude, provide them with auxiliary orbit change, auxiliary attitude determination, etc. Control will have great econo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 孟中杰张志斌黄攀峰王秉亨常海涛刘正雄
Owner NORTHWESTERN POLYTECHNICAL UNIV
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