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Study of VSC Reliable Designs With Application to Spacecraft Attitude Stabilization

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3 Author(s)
Yew-Wen Liang ; Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu ; Sheng-Dong Xu ; Tsai, C.-L.

This brief investigates variable structure reliable control (VSRC) issues of a set of second-order nonlinear systems and their application to spacecraft attitude stabilization. Both passive and active reliable designs are presented. To achieve the active task, an observer to identify faults as they occur in the spacecraft actuators is also presented. These VSRC laws do not require the solution of a Hamilton-Jacobi (HJ) equation, which is essential in the optimal approaches such as linear quadratic Riccati (LQR) and Hinfin reliable designs. As a matter of fact, this approach can relax the computational burden for solving the HJ equation. Simulation results regarding spacecraft attitude stabilization with comparisons among the VSRCs and the LQR reliable designs are also given. It is shown from these simulations that the active VSRC is the most flexible, robust and effective method because it does not need to prespecify susceptible actuators and because it allows more space for the control parameter adjustment

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Control Systems Technology, IEEE Transactions on  (Volume:15 ,  Issue: 2 )