关键词: 人机系统, 驾驶员诱发振荡, 极限环, 控制系统非线性, 描述函数

Abstract:

A pilot vehicle system (PVS) mathematical model containing nonlinear control elements of the flight control system is established by the describing function method; the limit cycle of PVS is determined; the relation between the limit cycle and pilot induced oscillation (PIO) and the influence of nonlinear control elements on PIO are explored. Numerical simulations of PVS verify the analysis results with JJ7 aircraft as an example.

Key words: pilot-vehicle system, pilot induced oscillation, limit cycle, nonlinear control element, describing function