姿态自动驾驶仪动力学特性的解析分析

An Analytical Analysis of the Dynamic Characteristics of Attitude Autopilots

根据实际问题的物理意义,提出求解姿态自动驾驶仪闭环参数解析解的一种简化方法。在此基础上分析姿态自动驾驶仪的动力学特性。姿态自动驾驶仪的动力学中存在一对高频根和一个低频根.高频根的响应速度很快,主要由系统开环增益大小决定,低频根的响应速度很慢,主要由攻角产生的升力大小决定。姿态自动驾驶仪的动态特性主要由低频根所决定,通过控制系统的设计并不能完全改善驾驶仪的动态特性,这会对制导外回路的设计带来极大的影响。

In this paper,a simple method for solving analytical solutions of attitude autopilots' closed-loop characteristic equation is proposed.Also,the dynamic characteristics of the attitude autopilot is discussed.A pair of high-frequeney roots and a low-frequency root exist in the attitude autopilot dynamics.The dynamic characteristics is mainly determined by the low-frequency root that is not completely improved by designing control system.Thus this will have a great influence on the outer guidance loop design.