基于干扰观测器的磁轴承开关功放延时补偿  

Time delay compensation of switching power amplifier for magnetic bearing based on DOB

作　　者：范友鹏[1] 刘淑琴[1] 李红伟[1] 张云鹏[1] 代燕杰[2] 

机构地区：[1]山东大学电气工程学院,山东济南250061 [2]山东电力集团公司电力科学研究院,山东济南250014

出　　处：《电机与控制学报》2013年第5期103-109,共7页Electric Machines and Control

基　　金：国家自然科学基金(51075236;51105231);山东省自然科学基金(ZR2012EEM031;ZR2011EEQ029);山东省优秀中青年科学家科研奖励基金(BS2012DX013)

摘　　要：为了解决延时引起的磁轴承系统稳定裕度下降问题,针对磁轴承开关功率放大器中存在的固有延时和可变延时进行了研究,提出了一种利用干扰观测器(disturbance observer,DOB)理论的时间延时补偿方法。该方法将开关功率放大器中产生的延时作为扰动项等效到输入端,并构造相应的干扰观测器模型对扰动项进行估计,实现对磁轴承开关功率放大器的延时补偿。仿真和实验结果表明,干扰观测器可以有效的降低超调,减小波形滞后失真,提高跟踪性能,从而验证此方法对于提高系统的动态响应速度是可行有效的。Time delay in magnetic bearing system declined the stability margin. In order to solve the problem, constant delay and variable delay of switching power amplifier were studied, and a time delay compensation method based on disturbance observer （DOB） theory was presented. In this method, time delay caused by switching power amplifier was transferred to the input of the system as disturbance source. and the corresponding disturbance observer model was constructed, which realized time delay compensation in switching power amplifier. Simulation and experimental results show that the overshoot and wavefor distortion are effectively reduced, and the tracking performance is improved, which verified the feasibility and effectivity for improving the dynamic response of system.

关 键 词：磁轴承 开关功率放大器 脉冲宽度调制 时间延时补偿 干扰观测器 

分 类 号：TH133.3[机械工程—机械制造及自动化]