Self-adaption compensation method for uncertainty of drive signs of actuator of satellite attitude control system

Abstract

The invention discloses a self-adaption compensation method for uncertainty of drive signs of an actuator of a satellite attitude control system and belongs to the field of aerospace. The self-adaption compensation method comprises steps as follows: (1), modeling is performed on the uncertainty of the drive signs of the actuator, and an actuator drive sign mode set is formed; (2), different self-adaption estimators are designed respectively for different drive sign modes in the established actuator drive sign mode set, and a self-adaption estimator set is formed; (3), a self-adaption controller set is designed by means of output of the self-adaption estimator set; (4), a control switching mechanism among self-adaption controllers is designed by means of output of the self-adaption estimator set, and an appropriate self-adaption controller is selected from the self-adaption controller set to generate a control signal to drive the actuator. The self-adaption compensation method can effectively guarantee the control accuracy when the drive signs of the actuator of the satellite attitude control system are uncertain, and the system can have satisfying work quality.

Description

technical field [0001] The invention belongs to the technical field of satellite attitude control, in particular to an adaptive compensation method for the uncertainty of driving symbols of an actuator in a satellite attitude control system. Background technique [0002] Aerospace technology is one of the fastest-growing cutting-edge technologies in modern science and technology. Among them, the development of modern satellite technology plays a very important and positive role in promoting human civilization and social progress. As the most important part of a modern satellite, the attitude control system plays a decisive role in its performance, safety and reliability. The satellite is a complex structural system, and it works for a long time in the environment of vacuum, weightlessness, high and low temperature and strong radiation. Sensors, actuators and system components will inevitably fail. Minor failures will affect the stability of the system. If the satellite is d...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an adaptive compensation method for the uncertainty of the driving sign of the satellite attitude control system actuator in view of the defects of continuous jumping of the control signal and poor transient response in the control method based on Nussbaum gain , so that the system attitude angular velocity asymptotically tracks the desired signal

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