【摘要】 在Boost变换器状态空间平均模型的基础上,利用基于微分几何的非线性最优控制策略,建立了非线性仿射模型,且推导出了非线性状态反馈表达式,得到了Boost变换器状态反馈精确线性化模型,并对其控制器进行了设计,实现了系统在工作点大范围内变化时的稳定运行,有效提高了系统的动、静态性能。Matlab/Simulink仿真结果表明,系统能稳定运行在目标工作点,对电源电压的变化和负载突变具有较强的鲁棒性。更多还原

【Abstract】 The nonlinear affine model of Boost converter is built based on its state space average model,which applies the nonlinear optimal control strategy based on differential geometry.The nonlinear state feedback functions of Boost converter are deduced,its exact linearization model with state feedback is obtained,and its controller is designed to enhance the dynamic and static performances of the system for realizing the stable system operation when the working point varies greatly.The simulative results of Matlab/Simulink show that the Boost converter operates stably at the objective working point,immune from supply voltage change and load mutation.更多还原