Fault-Tolerant Control of Satellite Attitude Control System Based on On-Line Compensation Algorithm

Abstract

For the actuator fault and the sensor fault of the satellite attitude control system, this paper presents a kind of Inter Model Control method based on online kernel learning algorithm, which use the character of Inter Model Control and the compensation ability of online learning method to constitute a kind of adaptive fault-tolerance control of the satellite attitude control system. First, a kind of kernel learning algorithm based on orthogonal matching pursuit is presented. In this algorithm, the thought of orthogonality is introduced to enhance the sparsity of the method so as to lighten the online compute burden. And the algorithm is based on the matching pursuit which ensures the bounded ness of the errors. Then, we use this algorithm to compensate the inverse model of the original model to build a kind of pseudo-linear system. At last, we introduce the pseudo-linear system into Inter Model Control of the satellite attitude control system and simulation results are presented to show the validation of the proposed fault-tolerance scheme.