弹性飞机自动寻优H_∞/PID控制器设计  

Design of Automatic-Optimization H_∞/PID Controller Based on Flexible Aircraft

作　　者：亢锐[1] 李爱军[1] 王景[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710129

出　　处：《测控技术》2013年第2期47-50,55,共5页Measurement & Control Technology

基　　金：航空科学基金资助项目(20090753007)

摘　　要：针对弹性飞机高阶性和鲁棒性要求,研究了自动寻优的H_∞/PID控制器设计方法。以国外某大型飞机12阶模型作为研究对象,利用平衡截断法进行降阶,得到在较宽频段内近似于全阶模型的6阶模型。基于降阶模型,利用粒子群优化算法得到合适的加权函数及PID控制器参数,用于控制全阶模型。仿真结果证明,在系统同时存在参数不确定性和非参数不确定性的情况下,与H_∞混合灵敏度控制器相比,H_∞/PID控制器具有更强的鲁棒性,并能取得更好的时域控制效果。The method of the automatic-optimization H∞/PID controller is studied for the requirement of the high-order characteristic and robustness of flexible aircraft. With the balanced truncation method, the order of a foreign large-scale aircraft model is reduced from 12 to 6, which then can be considered as a full-order model in a wide band. Then, the weighting function and PII）-controller parameters can be applied to control full-order model, which is obtained by the particle swarm optimization algorithm on the basis of the reduced-order model. The simulation results demonstrate that the H∞/PID controller reveals the better robustness and effects at the time domain than that of the H∞ mixed sensitivity controller in the case of the parametric and non-parametric uncertainties.

关 键 词：弹性飞机 加权函数 自动寻优 H∞混合灵敏度 PID 

分 类 号：V249[航空宇航科学与技术—飞行器设计]