【摘要】 利用回路整形和内模原理方法,选取合理频率域加权函数,结合实际被控对象状态空间模型,得到某广义被控对象状态空间模型,将原控制要求问题转化为标准H∞控制问题。基于LMI(LinearMatrixInequality)方法,对此广义对象进行最优H∞动态输出反馈控制器设计,进而求得原被控对象的控制器。以某型涡扇发动机为被控对象,进行混合加权灵敏度H∞动态输出反馈控制器设计,并在飞行包线范围内,进行了发动机控制系统非线性仿真验证。结果表明,此控制器满足抗干扰性、跟踪性要求,并具有一定鲁棒性。更多还原

【Abstract】 Choosing appropriate weighted functions in the frequency domain,and in combination with the state-space model of the real plant,the formulation of the state-space model for some generalized plant by employing the method of loop shaping and internal principle was established.The original control problem was converted to a standard H_∞ problem.The controller for the original plant was derived by means of solving optimal H_∞ dynamic output feedback controller for the generalized plant based on Linear Matrix Inequality (LMI).This design procedure was applied to a turbo-fan engine.The controller obtained by this method was verified in a wide engine operating range in the flight envelope.Simulation results of the turbofan engine nonlinear model show that the characteristics of the controller,namely,tracking characteristics,disturbance rejection and robustness,are satisfactory.更多还原