针对传统滑模观测器采用符号函数造成的控制不连续问题,文中提出了一种新的光滑连续的切换函数以代替符号函数,并利用该函数进行新型趋近律的设计,以便削弱传统滑模观测器存在的抖振问题,还加入了角度误差补偿以解决低通滤波器以及其他因素造成的相位滞后问题.以表贴式永磁同步电动机为对象,利用Matlab建立模型进行仿真对比分析,并建立电动机测试台架对所提改进进行验证.测试结果表明,文中提出的改进设计能有效改善传统滑模观测器所存在的抖振问题,对观测精度有一定提高.
In order to solve the control discontinuity problem caused by the traditional sliding-mode observer using symbolic function,a new smooth and continuous switching function is proposed to replace the symbolic function,which is used in the design of a new reaching law to alleviate the chattering problem of the traditional sliding-mode observer,and angle error compensation is introduced to solve the phase lag problem caused by low-pass filter and other factors.Taking the surface-mounted permanent magnet synchronous motor as an example,a model was established by Matlab for simulation and comparative analysis,and the motor test bench was established to verify the proposed improvement ideas.The test results show that the improved design proposed in this paper can effectively mitigate the chattering problem in the traditional sliding-mode observer and improve the observation accuracy to some extent.
谢佳莉;张旭梅;黄安贻
武汉理工大学机电工程学院 武汉 430070汉口学院 武汉 430212
机械工程
永磁同步电动机;无传感器控制;新型趋近律;角度估计误差补偿;滑模观测器
permanent magnet synchronous motor;sensorless control;new reaching law;angle estimation error compensation;sliding-mode observer
《起重运输机械》 2024 (013)
24-31 / 8
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