高超声速飞行器主被动复合一体化容错控制方法

Fault-tolerant control method for airbreathing hypersonic vehicles based on an active-passive composite approach

针对高超声速飞行环境力热载荷严酷,执行机构易发生脆化、热损伤、缺损等故障,进而导致姿态控制精度下降甚至失稳等问题,本文提出了主被动复合故障容错控制方法.该方法在舵面缺失故障发生初期,采用滑模控制策略满足鲁棒增稳控制需求,同时,采用在线气动辨识方法,估计故障引起的气动参数变化,在满足瞬时增稳需求后,结合气动参数辨识结果与飞发一体化自适应控制进行控制重构,提升故障后高超声速飞行器飞发一体化控制品质.通过数学仿真对比验证表明该方法的有效性,验证了该方法相对于单一容错控制策略具有更强的鲁棒性和更好的控制性能.

Airbreathing hypersonic vehicles(AHVs)feature a severe force and thermal loads flight environment,which leads to a high risk of elevator failures such as embrittlement,thermal damage,chipping,furthermore to affect the attitude control accuracy degradation and even destabilization.Accordingly,this paper proposes a fault-tolerant control strategy via the active-passive composite approach,which employs a sliding mode control(SMC)to guarantee the robustness of the system when aerodynamic parameters change abruptly at the initial stage of an elevator failure.Simultaneously,sensor data and the online aerodynamic identification approach are utilized to calculate aerodynamic force damages.After meeting the transient stabilization requirements,it will switch to the adaptive integrated-flight-propulsion control,thereby performing control reconfiguration and enhancing the flight control quality after the failure occurs.Finally,the simulation results verify the effectiveness and robustness of the strategy and also show a better control effect compared with a single fault-tolerant control strategy.