基于参数摄动的BTT导弹自动驾驶仪设计方法研究

本文基于变结构自适应控制理论,提出一种新的BTT导弹自动驾驶仪三通道独立设计方法.该方法不仅考虑了全部通道间的耦合因素,而且其控制律完全基于被控对象参数的最大摄动量,无需对系统进行在线参数辨识,提高了设计的准确性,增强了系统的适应性和鲁棒性.采用本文方法设计的BTT-90导弹自动驾驶仪,在考虑舵机系统、速率陀螺和加速度计等各种非理想因素情况下,得到了令人满意的仿真结果.

A New Autopilot Design Method for Bank-to-Turn Missiles Based on the Variable Structure Control Theory

For bank-to-turn(BTT) missiles, all previous autopilot 3-channel independence designs presented in the open literature are based on the classical control theory and the coupling that actually exists among the channels is neglected. Based on the variable structure adaptive control theory, a new 3-channel independence design method, which brings three main advantages, is presented here. Firstly, the control laws gotten with the method depend only on the maximum perturbation values and the nominal values of plant's parameters. Thus, the robustness of the control systems is considerably improved. Secondly, as there is no need to use parameter identifiers and disturbance estimators, the controller structures are greatly simplified. Thus, on-line realization is made easy. Thirdly, all the coupling factors of the channels are preserved and many non-ideal factors of control actuators, rate gyros and accelerometers are considered. Thus, more precise control laws are obtained. Finally, some digital simulation results are presented, and they show that the new method is satisfactory.