磁轴承基于扩展卡尔曼滤波的改进PID控制算法研究

摘要

提出了一种基于扩展卡尔曼滤波的改进PID控制算法.该算法以传感器测量的转子位移信号为量测量,功率放大器的输出电流为输入量,通过系统状态方程和噪声统计特性估计转子的实际偏心位移,有效解决了信号噪声对控制精度的影响问题.最后,通过仿真和试验,对比验证了算法的有效性.%An improving PID control algorithm based on extended Kalman filter was proposed.The algorithm uses the eddy current sensor to measure the rotor displacement as the amount of measurement,and the output current of the power amplifier as the amount of input,the actual eccentric displacement of the rotor was estimated by the system state equation and the noise statistical characteristic,which effectively solves the problem of the influence of the signal noise on the control accuracy.The result of simulation and experiment prove the proposed algorithm to be feasible and effective.