摘要
文章针对直接驱动交流直线伺服系统低速时存在的推力波动问题 ,提出了一种滑模控制方案。通过一种新型的神经网络负载推力观测器和扰动前馈补偿的设计 ,理论分析表明可有效地削弱推力波动及滑模控制产生的抖振。仿真结果证明该方案不但解决了永磁直线同步机的推力波动问题 ,而且对系统参数变化和负载扰动具有很强的鲁棒性。
A novel sliding mode control (SMC) based on NN thrust observer for the problem of thurst ripple in low speed of a direct drive AC linear servo system is presented. Theory analysis indicates that the thrust ripple and the chattering of the SMC system is effectively minimised by designing a new NN thrust observer and disturbance feed forward compensation. Simulations results verify that the proposed control scheme not only solves the thrust ripple problem of permanent magnet linear synchronous motor (PMLSM), but also makes the directdrive system have strong robustness against parameter variations and load disturbances.
出处
《电气传动》
北大核心
2002年第3期18-21,共4页
Electric Drive
基金
国家自然科学基金资助课题 (编号 5 9875 0 61)
