A cooperative control method of spacecraft anti-jamming attitude based on event-triggered communication

Abstract

The present invention relates to a kind of spacecraft anti-jamming attitude cooperative control method based on event-triggered communication, comprising the following steps: first, for a group of rigid spacecraft including pilot spacecraft and follower spacecraft, described by Modified Rodrigue Parameters (MRPs) Following the spacecraft attitude kinematics equation and dynamics equation, the unknown bounded interference of the spacecraft is modeled. This model is used to describe a variety of actual interferences; secondly, an interference observer is designed to estimate the interference so that the interference estimation error The index converges to zero; then, establish a filter and introduce an event trigger mechanism to describe the discontinuous communication between spacecraft; finally, combine the disturbance observer and filter, design the controller based on the backstepping method to ensure that all closed-loop signals are consistent Boundary, and the attitude tracking error can converge to a residual set smaller than a predetermined threshold. This method ensures that multi-spacecraft can achieve attitude cooperative tracking without continuous communication, and can compensate for unknown interference.

Description

technical field [0001] The invention relates to an event-triggered communication-based spacecraft anti-jamming attitude cooperative control method, which is mainly applied to the distributed attitude cooperative control of rigid spacecraft under unknown interference. The communication method belongs to the technical field of spacecraft control. Background technique [0002] The attitude control of spacecraft is an important issue in the field of spaceflight and control, and it plays a vital role in the completion of missions of spacecraft. For a single spacecraft, a variety of attitude control schemes have been developed through different methods such as sliding mode control, adaptive control, and model predictive control. [0003] Recently, there are more and more application requirements in spacecraft formation flight, space interferometry and on-orbit service, and the distributed attitude cooperative control of multiple spacecraft has therefore received more and more att...

AI Technical Summary

Problems solved by technology

In the patent application number 201910221537.3, a spacecraft attitude cooperative control method based on a distributed high-order sliding mode estimator is proposed, which considers part of the following spacecraft to obtain the information of the leading spacecraft, but the problems are as follows: (1) only considering the The communication topology of the directed graph fails to consider the more general directed graph situation; (2) The communication between spacecraft is required to be continuous, and the communication burden is heavy; the patent application number is 201811608556.3, which proposes a limited-time attitude of spacecraft formation The fault-tolerant control method considers the influence of the spacecraft by the disturbance torque, but only considers the time-invariant disturbance, and does not consider the time-varying disturbance; the patent application number is 201810826026. The controller cooperative control method, the optimization model solution is more complicated

In summary, the existing patent achievements lack control methods that consider the communication topology of general directed graphs, large-scale interference, and non-continuous communication between adjacent spacecraft.

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