Virtual Sliding Mode Control-based Attitude Estimation for Non-cooperative Spacecraft

doi:10.3969/j.issn.1000-1093.2016.07.017

Abstract

Abstract: A virtual sliding mode control design method is proposed for the nonlinear attitude estimation of non-cooperative spacecraft. The real-time observations outputted by the stereo vision system are used as the inputs of the virtual sliding mode controller, and the spacecraft attitude dynamics mathematical model is taken as a control object of the virtual controller. The virtual control torque is calculated by using the sliding mode variable structure controller. The virtual spacecraft attitude and the observed attitude are synchronous, and the virtual spacecraft attitude is the estimated value of attitude parameter of the non-cooperative spacecraft. Simulation result shows that the proposed estimation algorithm based on virtual sliding mode controller performs better than the extended Kalman filtering algorithm. The application of sliding mode boundary layer control achieves a good balance between the robustness of variable structure control and the smooth control chattering.

Key words: control science and technology, stereo vision, non-cooperative satellite, virtual sliding mode, attitude estimation, fuzzy boundary layer

CLC Number:

V448.21

YU Xiao-ting， YU Feng， HE Zhen， XIONG Zhi， WANG Zhen-yu. Virtual Sliding Mode Control-based Attitude Estimation for Non-cooperative Spacecraft[J]. Acta Armamentarii, 2016, 37(7): 1282-1290.

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