基于QFT的光电稳定控制系统设计与分析

为了克服模型摄动和各种扰动对机载光电稳瞄系统的影响，提出一种基于定量反馈控制理论（QFT）的光电稳定控制系统设计方法。该方法以方位回路作为讨论对象，基准模型参数值均为方位回路参数值，通过综合考虑被控对象的模型不确定范围（不确定范围取为基准值的±15%）和系统的性能指标，可实现一定范围模型摄动系统的强鲁棒性。在加入模拟幅值为0.06的力矩扰动作用下，设计系统的输出位置误差小于2×10-7rad，加入速度扰动，以国外某典型直升机角振动测试频谱作为速度扰动信号，设计系统位置误差限制在8×10-7rad内。仿真结果表明：设计的控制系统总体性能优于经典PID设计的系统。

Design and analysis of stabilized aiming control system based on QFT

A design method of an airborne stabilized-aiming system based on quantitative feedback theory (QFT) was proposed to overcome the influence of model perturbation and disturbances on the system. The method takes the azimuth loop as the discussion object and the model parameters as the parameter values of the azimuth loop. The strong robustness of the model perturbation system can be obtained in a certain range by the composite consideration to the model’s uncertainty range of the object control and system performance specification. The simulation results indicate the performances of the designed control system are better than the PID system’s.