大侧滑模型参考自适应飞行控制方法研究

Research on high-sideslip model reference adaptive flight control

针对飞机单侧副翼舵机卡死故障的飞行问题,研究了基于模型参考自适应控制的大侧滑角飞行控制方法。首先给出进行大侧滑角直飞的级联式飞行控制方案,并对控制信号间的关系进行分析;其次对与侧滑角指令有关的姿态内环进行模型参考自适应控制结构和算法设计,同时给出参考模型选取方法;最后分别在无故障和单侧副翼舵机卡死飞机下进行非线性仿真验证。仿真结果表明,该控制方法能够在气动数据摄动和控制器参数初值随意选取下,仅利用故障前配平点使得飞机在发生单侧副翼舵机卡死后能够跟随参考模型响应,并进一步无静差地跟踪大侧滑角指令,具有较好的鲁棒性和实用性。

This paper develops a method of high-sideslip flight control based on model reference adaptive control （MRAC） to stabilize aircraft under one side aileron deadlock. Above all, the cascaded flight control scheme for high-sideslip straight flight is presented and the relationship among control signals is also analyzed. Next, the control structure and laws of MRAC for attitude in- ner-loop connected with sideslip command are designed in formulation, while the principle of choosing reference model is also giv- en. Finally, the control scheme is verified under one nonlinear aircraft model in conditions of no fault and one side aileron dead- lock. The simulation results show that when one side aileron deadlock occurs in accompany with aerodynamic data perturbation and random initial controller parameters, this control method could only utilize operation points of no-fauh aircraft to make the fault air- craft follow given reference model responses and finally trace sideslip angle command without static error. The whole control scheme owns the preferable properties of robustness and practicality.