降维状态观测器是非常重要的一类观测器 基于P变换的降维观测器设计方法，-Reduced-order state observer is a very important class of observer-based P Transform reduced order observer design method

根据系统的输入和输出，辨识系统的的传递函数。该系统为6阶系统，通过降阶降为2阶后，加入状态反馈和状态观测器，调整参数使2阶系统稳定，最后用于控制原6阶系统。阶跃响应和bode图效果都不错。-Based on the input and output of the system, the transfer function of the system is identified. The system is a 6 order system. After the order is reduced