摘要
针对常规 H∞ 混合灵敏度设计只能解决较小范围内的参数模型摄动 ,研究了大范围模型参数变化系统的鲁棒控制方法 ,讨论了基于 H∞ 控制理论的两种设计方法。重点介绍了大范围参数摄动的鲁棒 H∞ 混合灵敏度设计 ,这种方法同时考虑了参数不确定性和未建模动态不确定性的影响。以某飞机为算例 ,设计大包线范围内的姿态角控制律 。
When real parameter uncertainty is large, one way of using H ∞ mixed sensitivity design method to achieve robust control is to adopt firstly a design measure for limiting parameter uncertainty to be less than allowable, but this leads to unnecessarily complex design. Our relatively simple way of using H ∞ mixed sensitivity method to achieve robust control can consider unmodelled dynamics and large real parameter uncertainty of plant simultaneously. Section 2 discusses that, by introducing several virtual perturbation signals and several virtual assessment signals, we can convert the large parameter problem into one of a new augmented system with reduced parameter uncertainty that can be solved by standard H ∞ mixed sensitivity design method. As a numerical example,we design a robust control law for a military aircraft and Fig.1 shows simulation results. We need only a single control law though we must provide sufficient robustness for a flight envelope variation that is large. The simulation results of this example show preliminarily that our method is effective.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2002年第3期406-409,共4页
Journal of Northwestern Polytechnical University
