基于新型趋近率的PMSM混沌同步控制  

Synchronization Control of Chaotic System of Permanent Magnet Synchronous Motor Based on A New Reaching Law Rate

作　　者：刘童 许波[1] LIU Tong;XU Bo(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013

出　　处：《组合机床与自动化加工技术》2024年第11期147-151,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(61703186)。

摘　　要：针对具有模型不确定性与外部扰动的永磁同步电机混沌系统,提出一种基于新型变速趋近律的自适应滑模抗扰同步控制方案,首先构造了双曲正切函数,并设计了新的变速趋近律,设置减速点,到达减速点前加快了滑模变量的收敛速度,到达减速点后减小增益,有效降低控制器的抖振幅值。同时,为进一步提高系统的抗扰动性能,引入了扩张状态观测器来估计系统扰动和内部不确定性用于前馈补偿。研究结果表明,所提出的基于扩张状态观测器的自适应滑模控制策略,可使具有不确定项与外部干扰的电机混沌系统在有限时间内同步,同时抑制了抖振现象,相较于传统的指数趋近律方法,抖振幅值减小了64%。Aiming at the chaotic system of permanent magnet synchronous motor with model uncertainty and external disturbance,an adaptive sliding mode disturbance rejectionsynchronous control scheme based on novel variable speed reaching law is proposed.First,hyperbolic tangent function is constructed,and a new variable speed reaching law is designed.The deceleration point is set,and the convergence speed of sliding mode variable is accelerated before reaching the deceleration point,and the gain is reduced after reaching the deceleration point.Effectively reduce the buffeting amplitude of the controller.At the same time,in order to further improve the anti-disturbance performance of the system,an extended state observer is introduced to estimate the disturbance and internal uncertainty of the system for feedforward compensation.The results show that the adaptive sliding mode control strategy based onextended state observer proposed in this paper can make the motor system with model uncertainty and external disturbance enter the synchronous state in the finite time and suppress the chattering phenomenon.Compared to the traditional exponential approach method,the jitter amplitude value has been reduced by 64%.

关 键 词：趋近律 自适应滑模 混沌系统 有限时间控制 扩张状态观测器 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]