飞行器变结构鲁棒控制

A VARIABLE STRUCTURE SYSTEM(VSS) TO ROBUST CONTROL OF AIRCRAFT

近20年来,变结构系统(VSS)理论的发展日益引人注目。本文旨在将变结理论引入到飞行控制系统的设计,并提出一种新的设计方法和工程实现的方案,通过系统仿真,证实了这种方法和方案是可行的。 在变结构飞行控制系统的设计上,Anthong J.Calise和Friedrich S.Kramer以及C.M.Derling先后研究了在一定飞行状态下变结构系统对相对飞行模型误差的鲁棒性的影响。本文将讨论飞行状态(空域,速度等)变化情况下,VSS的控制效果,并以某型无人机为例,与传统的PD控制结果进行比较。研究将集中于飞机的纵向运动控制。

when airplanes fly in large flight envelope, it is often required that their control systems have robust property because of the variation of aerodynamics and structure parameters. If using classical control theory, it would be very difficult to design a flight control system to meet pre-determined performance indices for each flight envelope. This paper is to apply variable structure system (VSS) theory to flight control system design, A general technique for scalar VSS CAD is suggested and special attention is paid to engineering application. A numerical example is given and is compared with original PD control by simulation.It is obvious that the variable structure flight control system is insensitive to the flight parameters change and external disturbances.