三回路过载自动驾驶仪鲁棒性分析

Robustness Analysis of Three-Loop Acceleration Autopilot

建立了过载自动驾驶仪模型,分析了三回路过载自动驾驶仪的结构特点,研究了三回路过载自动驾驶仪的鲁棒性。研究表明:相对于两回路过载自动驾驶仪,三回路过载自动驾驶仪引入攻角反馈构造了新飞行器,使构造飞行器回路处于较高频段,而驾驶仪的主导极点处于与设计参数相关的低频段,这使得过载自动驾驶仪的特性与原飞行器特性的相关度较小,而更多取决于设计参数,从而使三回路过载自动驾驶仪有更高的鲁棒性。

In this paper, the model of overload autopilot is established, the structural characteristics of three-loop overload autopilot are analyzed, and the robustness of three-loop overload autopilot is studied. The results show that, by comparing with the two-loop overload autopilot, the angle of attack is introduced by the three-loop autopilot to build a new aircraft, so that, the construction of the aircraft circuit is in the higher frequency band, and the pilot＇s dominant pole is in the low frequency band associated with the de- sign parameters. This results in the less characteristics of autopilot relevant with the characteristics of the o- riginal aircraft and more dependance on the design parameters, so that, the three-loop overload autopilot has higher robustness.