基于位置跟踪观测器的脉振高频电压注入信号的无传感器控制系统的仿真模型，低通滤波器的设计采用巴特沃斯方法，阶数为1-Based on the position tracking observer, the low-pass filter is designed using the Butterworth method, and the order is 1

比较详细的介绍了脉振高频注入方法的原理，对其中存在的缺陷做了详细介绍。(The principle of pulse high frequency injection method is introduced in detail, and its defects are introduced in detail.)