Spacecraft anti-interference attitude cooperative control method based on event-triggered communication

Abstract

The invention relates to a spacecraft anti-interference attitude cooperative control method based on event-triggered communication. The method comprises the following steps: firstly, for a group of rigid spacecrafts which comprises a pilot spacecraft and a following spacecraft, describing an attitude kinematics equation and a kinetic equation of the following spacecraft by using modified Rodrige parameters (MRPs), and modeling unknown bounded interference of the spacecraft, the model being used for describing a plurality of actual interferences; secondly, designing a disturbance observer, estimating disturbance, and enabling a disturbance estimation error index to converge to zero; secondly, establishing a filter and introducing an event triggering mechanism to describe discontinuous communication between spacecrafts; and finally, designing a controller based on a backstepping method in combination with a disturbance observer and a filter to ensure that all closed-loop signals are consistent and bounded, and the attitude railing error can be converged into a residual set smaller than a predetermined threshold. According to the method, attitude cooperative railing of multiple spacecrafts under the condition of no continuous communication is ensured, and unknown interference can be compensated.

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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