摘要
为提高永磁同步电机交流伺服系统的电流环带宽和动态响应性能,提出了一种基于预测评价函数与滑模观测器的两步电流预测控制方法。首先设计了以获得最优电压矢量为控制目标的预测评价函数,解决了现有两步电流预测控制中系统噪声引起较大电流波动的问题;然后基于包含参数摄动项的定子电压方程和新型开关函数设计了一种滑模观测器,当观测器选取合适的增益矩阵时所观测的等效电流误差收敛于因电气参数失配导致的电流预测误差,并可根据等效电流误差进行相应电压的补偿修正。在电机控制性能测试平台上对所提出的方法进行了幅值为3 A的q相电流阶跃响应实验,电流环带宽测试实验以及控制器鲁棒性实验,结果表明:该方法不仅能够有效提高伺服系统电流环的带宽水平和动态响应性能,还具有较高的鲁棒性。
A two-step predictive current control method based on a predictive evaluation function and a sliding mode observer is proposed to improve the current bandwidth and dynamic performance of servo systems with permanent magnet AC servo system.Firstly,a predictive evaluation function is designed to obtain the optimal voltage vector and to attenuate the current fluctuation in the existing two-step predictive current control caused by system noise.Then,a sliding mode observer is designed based on a stator voltage equation with parameter perturbation and a new switch function.When the gain matrix of the observer is selected properly,the observed equivalent current error converges to the current prediction error caused by mismatch of the electrical parameters,and the corresponding voltage is compensated and corrected according to the equivalent current error.The q-phase current step response experiment with the amplitude of 3 A,the current loop bandwidth test and the controller robustness test are carried out on a motor control performance testing platform.Results show that the proposed control method effectively improves the dynamic response performance and the bandwidth of the current loop of permanent magnet synchronous motor(PMSM),and has sufficient robustness.
作者
邓旭斌
姜歌东
孙铮
赵飞
梅雪松
DENG Xubin;JIANG Gedong;SUN Zheng;ZHAO Fei;MEI Xuesong(State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2020年第10期84-93,共10页
Journal of Xi'an Jiaotong University
基金
国家重点研发计划资助项目(2018YFB1304505)
国家自然科学基金资助项目(51975461)。
关键词
永磁同步电机
电流预测控制
最优电压矢量
高鲁棒性
permanent magnet synchronous motor
predictive current control
optimal voltage vector
high robustness
作者简介
邓旭斌(1994-),男,硕士生;通信作者:孙铮,男,博士,助理研究员。
