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Fuzzy Sliding Mode Control for Hypersonic Reentry Vehicles
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LI Jingjing,REN Zhang，SONG Jianshuang
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(National Key Laboratory of Science and Technology on Holistic Control,
Beihang University, Beijing 100191, China)
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Abstract This paper developed a fuzzy sliding mode controller for the attitude control of hypersonic reentry vehicles. First, the controloriented model of vehicles is given. Then, by combining fuzzy control theory and sliding mode control technique, a fuzzy sliding mode control method is proposed. The design of fuzzy sliding mode controller is based on a predesigned sliding surface in the stable error phase plane. The output of the fuzzy controller is accordingly adjusted with respect to the distances between the error state and the sliding surface, which could force the system state to reach the sliding surface, in turn lead error to converge to the origin along it. Furthermore, this control design method is applied to the attitude control problem of hypersonic reentry vehicles. Three independent fuzzy sliding mode controllers are designed for the control of angle of attack, sideslip and bank. In addition, a practical piecewise linear control allocation scheme is introduced. Finally, the simulation results show that the proposed method is feasible.
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Received: 30 August 2010
Published: 28 February 2011
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