舰载机着舰离散H_2/H_∞控制

Discrete H_2/H_∞ Control for Carrier Landing

舰载机着舰对控制的精度和鲁棒性等有很高的要求。已有的文献在设计着舰控制器时,没有考虑反馈信号的离散采样,而信号采样对控制系统性能具有重要影响。文中采用了离散系统的H_2/H_∞控制方法,来设计包含反馈信号采样的着舰鲁棒控制器,并与着舰工程实际的控制结构进行了仿真比较。仿真表明,系统在高度偏差纠正、舰尾流抑制、模型摄动抑制等方面的控制效果很好,达到着舰规范要求,且远优于工程上着舰控制结构,由于鲁棒控制器将高度轨迹的信号引入到了油门通道,这使得系统能避免工程实际中的高度响应的初始负调问题。

The requiment in precision and robust performance of aircraft carrier landing is very high.In the previous literature,the discrete sampling of the feedback signals is not considered in the controller design,however the signal sampling has an important influence on the performance of control system.The H2/H∞ control method of discrete system is used to design robust landing robust controller with feedback signals sampling.And the carrier landing engineering control structure is designed to compare with the above robust control.Simlation shows that the control effects are very good in many aspects such as height error correction,air wake suppression,and model perturbation suppression and so on,which meet the requiments of landing criterion,and are better than the engineering control method.And because the robust controller introduces the height trajectory signal to the throttle channel,the system can avoid the problem of height initial inverse response in engineering practice.