局部输出反馈阵的求取与应用

Computation and Application of Partial-Output Feedback Matrices

特征结构配置法是设计多模态飞行控制系统一种较为有效的方法。在设计时,它可将系统的性能指标与飞机的飞行品质要求结合起来,获取直接和希望的控制规律。本文在此基础上,提出求局部输出反馈阵(其中一部分元素限定为零)的方法,从而可使设计具有更大的灵活性,系统配置也可更为简单。 文中简述了特征结构配置法,对提出的输出反馈阵中元素可限定的计算方法给予推导和论证,并以此法设计了某型飞机多模态飞行控制系统中空中格斗/空地扫射两个控制模态(解耦的)的控制规律,最后对设计的结果作了数字仿真。仿真结果表明:设计的系统具有令人满意的性能,提出的方法是完全可行的。

The eigenstructure assignment method is an efficient approach in designing multi-mode flight control systems ,which could determine the expected control law directly through integrating the system performance index with the flight quality requirements of aircraft. Based on this method,the partial output feedback control principle is discussed, the algorithm of partial output feedback matrices with some elements fixed is developed, and thus the result control system configuration is simplified.The principle of the eigenstructure assignment method is summarized first,the algorithm of partial output feedback matrices with some elements fixed is developed, and a practical control law for two control modes of a multi-mode flight control system for an aircraft,the air-to-air combat and the air-to-surface strafing,are designed in detail. Finally,digital simulations of the designed system are conducted. The results show that satisfactory performances are achieved,and the developed method is feasible.