基于积分滑模观测器的直线振荡电机谐振频率跟踪控制  

Resonant Frequency Tracking Control of Linear Oscillatory Machine Based on Integral Sliding Mode Observer

作　　者：廖凯举 徐伟[2,3] 葛健 李东一 苏诗湖 邓江明 Liao KaijuXu Wei;Liao Kaiju;Xu Wei;Ge Jian;Li Dongyi;Su Shihu;Deng Jiangming(Key Laboratory of High Density Electromagnetic Power and Systems(Chinese Academy of Sciences)Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190,China;Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518052,China;State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan 430074,China;CRRC Zhuzhou Motor Co.Ltd Zhuzhou 412001,China;CRRC Zhuzhou Locomotive Co.Ltd Zhuzhou 412001,China)

机构地区：[1]高密度电磁动力与系统重点实验室(中国科学院)中国科学院电工研究所,北京100190 [2]深圳华中科技大学研究院,深圳518052 [3]强电磁技术全国重点实验室(华中科技大学),武汉430074 [4]中车株洲电机有限公司,株洲412001 [5]中车株洲电力机车有限公司,株洲412001

出　　处：《电工技术学报》2024年第14期4366-4376,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(52277050);深圳市协同创新计划国际科技合作项目(GJHZ20210705142539007)资助。

摘　　要：现有直线振荡电机(LOM)无位置传感器谐振频率跟踪控制方法存在行程观测精度低、抗干扰能力差等问题,容易导致谐振频率跟踪精度低、频率振荡严重。为提高谐振频率跟踪控制性能,该文研究了一种基于积分滑模观测器(ISMO)的新型谐振频率跟踪控制方法。首先,基于LOM工作在系统谐振频率点时行程-电流相位差为90°的特点,提出一种双互相关函数比值方法,消除了行程变化对谐振频率跟踪控制的影响。其次,采用积分滑模面及新型趋近律设计ISMO,并利用二阶广义积分器获取行程估算信号,大大提高了行程估算精度。最后,对比实验结果表明,所提方法能够有效提高谐振频率跟踪精度、稳定时间及抗干扰能力。In order to improve the safety and reliability of the system and achieve maximum output efficiency,it is necessary to simultaneously implement position sensorless piston stroke closed-loop control and resonant frequency tracking control for the linear oscillatory machine(LOM).Existing control methods for position sensorless resonance frequency tracking have low stroke estimation accuracy and poor anti-interference ability,which causes low resonant frequency tracking accuracy and severe frequency oscillation.This paper investigates a new resonant frequency tracking control method based on the integrated sliding mode observer(ISMO).When the LOM operates at the system resonant frequency point,the phase difference between stroke and current is exactly 90°.Accordingly,a double cross-correlation function ratio(DCFR)method is proposed to track the system resonant frequency.A second-order generalized integrator(SOGI)generates the current orthogonal signal.This method can eliminate the influence of stroke on resonance frequency tracking control,thereby improving the anti-interference ability of the control system.An integrated sliding mode surface and a new reaching law are used to design an ISMO to reconstruct the information of back electromotive force(EMF).Since the back EMF is positively proportional to the velocity signal,the piston velocity can be calculated.The piston stroke can be obtained by integrating the velocity signal.However,specific DC components exist in the measured voltage and current,and a pure integrator can cause the integral saturation problem.Therefore,an SOGI is used to filter the estimated back EMF signal to obtain the accurate stroke estimation signal.Finally,due to the strong parameter robustness of ISMO and the anti-interference ability of DCFR,the combination of ISMO and DCFR is used to achieve the position sensorless resonant frequency tracking control.Experimental results show that the proposed method effectively improves the tracking accuracy,settling time,and anti-interference ability.Th

关 键 词：直线振荡电机(LOM) 谐振频率跟踪控制 积分滑模观测器(ISMO) 双互相关函数比值(DCFR)方法 二阶广义积分器(SOGI) 

分 类 号：TM32[电气工程—电机]