频域加权最优隐模型跟踪法及其在飞控系统设计中的应用

OPTIMAL IMPLICIT MODEL-FOLLOW ING APPROACH WITH FREQUENCY-SHAPED WEIGHTING AND ITS APPLICATION TO DESIGN OF FLIGHT CONTROL SYSTEM

把频率加权二次型法与隐模型跟踪理论综合起来,在系统设计时,考虑系统的稳定性、动态特性和鲁棒性要求,以期达到满意的综合指标。利用所述方法,设计了飞控系统的控制律。通过数字仿真及实时混合仿真表明,与通常最优二次型方法所设计的控制律比较,用本文所述方法设计的控制律,不仅有满意的稳定性和动态特性,而且还改善了鲁棒性。

The synthesis of frequency-shaped weighting matrixes in the quadratic cost functional and the theory of implicit model-following is presented and the approach to select frequency-shaped weighting matrixes is studied. The procedure using this method to design flight control law is given. In the synthesis the stability, desided transient and ste-ady-state response characteristics and robustness of system are considered so as to get the satisfactory synthetic results. This mehtod is used to design a flight control law for a fight aircraft. In comparison with the flight control law designed by using normal linear quadratic method, the flight control law designed by using this method has not only satisfying stability and transient response characteristics but robustness is also improved. The structural mode response of the aircraft is well suppressed. These results are proved by digital simulation and real-time microprocessor realization.