高超声速飞行器自适应故障估计与容错控制

Adaptive Fault Estimation and Fault-Tolerant Control of a Flexible Hypersonic Vehicle

为提高高超声速飞行器的安全性和可靠性,针对飞行器的执行机构失效故障问题,进行了自适应滑模容错控制方法的研究。首先,基于弹性高超声速飞行器的纵向动力学方程建立故障模型,并转化为严格反馈形式。其次,利用反步法设计控制输入,构造自适应滑模容错控制律,及时快速处理故障影响。最后,利用Lyapunov稳定性理论证明了系统的渐近稳定性,仿真结果表明该方法能有效处理执行器控制效益损失故障,有较好的鲁棒性和容错能力。

In order to improve the security and reliable of the hypersonic vehicle, an adaptive sliding mode fault-tolerant control method is proposed to deal with the actuator faults. Firstly, a fault model is established based on the longitudinal dynamic model of flexible hypersonic vehicles, and transformed into strict feedback form. Secondly, the Back-stepping method is utilized to design the control input, and the adaptive sliding mode fault tolerant control law is proposed to deal with the actuator faults timely and quickly. Finally, the stability of the system is proved by Lyapunov stability theory. Simulations results show that the proposed method can effectively deal with the actuator effectiveness loss fault, and has good robustness and fault tolerant performance.