【摘 要】
：
将μ分析方法应用到飞行控制律的评估中,以再入飞行器纵向模型及为其设计的PID控制器和LQR控制器为研究对象,针对参数不确定性建立线性分式变换(LFT)模型,基于不稳定特征值评
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将μ分析方法应用到飞行控制律的评估中,以再入飞行器纵向模型及为其设计的PID控制器和LQR控制器为研究对象,针对参数不确定性建立线性分式变换(LFT)模型,基于不稳定特征值评估准则使用结构奇异值理论对模型进行分析,使用matlab的μ分析与综合工具箱得到的仿真结果表明,2种控制器均具有较好的鲁棒稳定性,满足鲁棒性能要求,并且得到了最坏情况的不确定参数组合。
The μ analysis method is applied to the evaluation of flight control law, and the longitudinal model of reentry vehicle and the PID controller and LQR controller designed for it are taken as the research object. A linear fractional transformation (LFT) model is established for parameter uncertainty. Based on the unsteady eigenvalue evaluation criteria, the structure singular value theory was used to analyze the model. The simulation results using matlab’s μ analysis and synthesis toolbox showed that both controllers have better robust stability and robust performance Requirements, and got the worst combination of uncertain parameters.
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