一种基于非线性反馈重复控制策略的磁通切换直线电机推力波动抑制方法

发布时间：2019-02-15 03:06

【摘要】：针对初级永磁型磁通切换直线(LFSPM)电机,研究其定动子双凸极结构引起的与位移相关的定位力、摩擦力及参数变化等不确定性对伺服系统的影响,提出一种基于非线性反馈的重复控制策略。首先,在分析LFSPM电机定位力的基础上,通过设计重复控制器对定位力引起的推力波动进行抑制;随后设计非线性反馈控制器,对因摩擦力及参数变化等不确定性因素引起的推力波动进行补偿,同时使逼近误差随周期数的累加而呈现减小的趋势,保证了系统的全局渐近稳定性。最后,通过AD5435半实物系统搭建了控制模型,实验结果表明,该控制方案有效抑制了因定位力及其他不确定因素引起的推力波动。
[Abstract]:Aiming at the primary permanent magnetic flux switched linear (LFSPM) motor, the effects of displacement related positioning force, friction force and parameter change on the servo system caused by the fixed mover double salient structure are studied. A repetitive control strategy based on nonlinear feedback is proposed. Firstly, based on the analysis of the positioning force of the LFSPM motor, the thrust fluctuation caused by the positioning force is suppressed by designing a repetitive controller. Then the nonlinear feedback controller is designed to compensate for the thrust fluctuation caused by the uncertain factors such as friction force and parameter change. At the same time, the approximate error decreases with the accumulation of the period. The global asymptotic stability of the system is guaranteed. Finally, the control model of the AD5435 hardware-in-the-loop system is built. The experimental results show that the proposed control scheme can effectively suppress the thrust fluctuation caused by the positioning force and other uncertain factors.
【作者单位】：南京工程学院电力工程学院;东南大学伺服控制技术教育部工程研究中心;飞行器控制一体化技术重点实验室;
【基金】：国家自然科学基金(51377074;51507077) 南京工程学院引进人才科研启动基金(YJK2017);南京工程学院科研基金平台与实验专项基金(PTKJ201610) 航空科学基金(20130769005)资助项目
【分类号】：TM359.4

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