卡尔曼滤波器在高频信号注入法中的应用

An Application of Kalman Filter in the Method of High-frequency Signal Injection

高频信号注入法估计永磁同步电机转子位置的精度,依赖于高频电流信号的提取。卡尔曼滤波器是对付白噪声的有力工具,本文针对高频注入信号的特点,设计了卡尔曼滤波器,并进行了仿真和实验研究。结果表明,经过卡尔曼滤波器的处理,电流信号信噪比大大提高。

The rotor position estimation of permanent-magnet-synchronous motor based on high-fi：equency signal injection needs a perfect injection current, so it will degrade the estimation accuracy due to the sample white-noise , which is hard to remove by ordinary digital filter. Kalman filter is a powerful tool to cope with this kind of noise. This paper discusses the design and simulation of a kalman filter and runs it in a DSP-controlled motor, the experimental result shows that the kalman filter works well.