基于滑模自抗扰的PMLSM电流偏差解耦控制

针对永磁直线同步电动机(PMLSM)存在电流耦合以及在运行过程中易受参数变化的影响使系统鲁棒性降低,本文设计了一种基于滑模自抗扰的电流偏差解耦控制(SADRC-CDDC)方法.从参考电流与实际电流作差处引入两轴交叉耦合支路,建立含耦合项的电流控制方程,计算出耦合量并对系统进行补偿,设计电流偏差解耦控制器(CDDC),用...

Current deviation decoupling control based on sliding mode active disturbance rejection for PMLSM

Current deviation decoupling control based on sliding mode active disturbance rejection(SA?DRC-CDDC)was designed for permanent magnet linear synchronous motors(PMLSMs),which were af?fected by current decoupling and parameter variation.The d-q axis cross-coupled branch was introduced at the difference point between the reference and actual currents.The current deviation decoupling controller(CDDC)was then designed by establishing the current control dynamics with the coupling term and calcu?lating the coupling term for system compensation,which weakened the influence of the d-q axis current coupling.However,the decoupling value cannot be eliminated when the value of inductance varies.Therefore,the sliding mode active disturbance rejection controller(SADRC)was used to solve the distur?bance caused by the parameter variation and to compensate for the system;thus,the system can realize ap?proximately complete decoupling.From the theoretical analysis,the controller satisfied asymptotic stabili?ty,and the robustness of the system was verified.The effectiveness of the designed SADRC-CDDC scheme was proved by the system experiment result.Compared with CDDC,SADRC-CDDC can achieve a more robust performance as the maximum oscillation amplitude of the d-axis current is reduced by 34.88%-54.76%,and the maximum oscillation amplitude of the q-axis current is reduced by 47.83%-71.43% when the system is affected by current coupling and parameter variation.