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Fault-tolerant control design for near-space vehicles based on a dynamic terminal sliding mode technique

机译:基于动态终端滑模技术的近空间飞行器容错控制设计

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摘要

In this paper, a fault-tolerant control scheme based on a second-order dynamic terminal sliding mode is proposed for a near-space vehicle attitude dynamical system in the presence of actuator faults, model parameter uncertainties and external disturbances. The principle of the proposed dynamic terminal sliding mode scheme is firstly introduced. Then, a near-space vehicle attitude faulty model with parameter uncertainty is established. Furthermore, two dynamic terminal sliding mode controllers are designed for the inner and outer loops. It is shown that the proposed algorithm can reduce chattering phenomenon and guarantee system stability and asymptotic state tracking. Finally, simulation results are provided to demonstrate the performance of the proposed fault-tolerant control scheme.
机译:针对存在执行器故障,模型参数不确定性和外部干扰的情况,提出了一种基于二阶动态终端滑模的容错控制方案。首先介绍了所提出的动态终端滑模方案的原理。然后,建立了具有参数不确定性的近空间飞行器姿态故障模型。此外,两个动态终端滑模控制器设计用于内部和外部回路。结果表明,该算法可以减少抖振现象,保证系统稳定性和渐近状态跟踪。最后,提供仿真结果以证明所提出的容错控制方案的性能。

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