摘要
将圆筒型永磁直线电动机的参数变化看作系统的干扰,采用状态空间法,在旋转坐标系下建立圆筒型永磁直线电动机模型;根据所建立的模型,将永磁直线电动机电流控制器的设计问题转化为L2控制标准问题;对L2控制标准设计问题,选取二次型函数作为HJI不等式存储函数,采用线性矩阵不等式方法,推导出了电流控制器的解析表达式,并且证明了该闭环系统是渐进稳定的。通过一个L2控制器,实现了对d轴和q轴电流的控制。仿真研究表明,L2控制策略能够抑制圆筒型永磁直线电动机参数变化对电流的影响。
The state space model of tubular permanent magnet linear motor（TPMLM） in the rotary coordinate was established, regarding the TPMLM parameter change as the disturbance of TPMLM servo system. According to the model, design problem of the current controller of TPMLM servo system was translated into L2 control problem. The quadratic function was chosen as the storage function of HJI inequation. The analytical expressions of current L2 control law was deduced by linear matrix inequality, and the asymptotical stability of the closed-loop system was proved. The control of d axis current and q axis current were achieved trough a L2 controller. Simulation researches indicate that the L2 control law can attenuate the motor parameter variance effect on the current efficiently.
出处
《微特电机》
北大核心
2011年第9期58-61,共4页
Small & Special Electrical Machines
