Non-cooperative target attitude tracking control method of controller failure and saturation characteristics

Abstract

The invention discloses a non-cooperative target attitude tracking control method considering controller failure and saturation characteristics. A relative attitude tracking model between two spacecrafts is established, analysis and mathematical representation are performed on actuator failure and saturation characteristics of the spacecrafts to obtain a relative attitude tracking model considering the actuator faults and saturation characteristics, analysis and scaling processing are performed on uncertainty occurring in the relative attitude tracking model considering the actuator faults andsaturation characteristics, a fault-tolerant saturation control equation is designed by using the adaptive technology and a sliding mode control method, the motion information of non-cooperative targets is not needed, no despondence is relied on tracking the inertia information of the spacecrafts, and the external interference and the influence of the controller failure and saturation characteristics can be resisted. By adoption of the non-cooperative target attitude tracking control method disclosed by the invention, under the conditions of external interference, system parameter uncertaintyand occurrence of the controller failure and saturation characteristics, uniform bounded control of the system state is achieved, and the control method does not depend on any motion information of the non-cooperative targets.

Description

technical field [0001] The invention belongs to the field of aerospace attitude dynamics, and in particular relates to a non-cooperative target attitude tracking control method based on controller failure and saturation characteristics. Background technique [0002] With the rapid development of space technology, the space environment has become one of the indispensable parts to promote national economy and national strategic security. In the short few decades since human beings started space exploration activities, thousands of artificial satellites have been sent into space to complete various space operation tasks. However, with the increase of space activities, the space environment becomes more and more harsh. The existence of a large number of space non-cooperative targets, including space debris and abandoned satellites, not only wastes many extremely valuable space positions, but also poses a huge challenge to the safety of space launch activities. In this situatio...

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Problems solved by technology

At the same time, considering the complexity of the structure of the service spacecraft and the diversification of functions, the controller may also fail

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