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Disturbance-Observer-Based Second Order Sliding Mode Fault Tolerant Control for Airbreathing Hypersonic Vehicles

Peng Li, Jianjun Ma, Zhiqiang Zheng

Abstract


The paper presents a sliding mode control scheme for a multi-input multi-output airbreathing hypersonic vehicles faulttolerant control (FTC) system design. The fault tolerant control scheme is designed by using a disturbance observer(DOB)-based fixed-time convergent second order sliding mode (SOSM), which contains two parts: a fixed-time convergent second order sliding mode and a fixed-time convergent DOB. The proposed control algorithms have the following properties: 1) fast and accurate response even in the presence of uncertain parameters and actuator failures; 2) On-line damage identification is not required by this design; and 3) computational simplicity and straightforward tuning. Simulation results using a airbreathing hypersonic vehicle model show good performance in actuator failure scenarios which validate the effectiveness and feasibility of the proposed control scheme.

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References


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DOI: http://dx.doi.org/10.21535%2FProICIUS.2014.v10.292

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