摘 要:针对开关磁阻电动机的高度非线性和难以建立精确模型的特点,提出一种滑模控制方法。其主要特点是控制率主要根据切换面和趋近率来选择,使系统状态约束在切换面两边,最后到达原点,而且控制率与系统模型关系不大。同时对于普通指数趋近率提出了改进方法;最后在Matlab环境下对此滑模控制进行了仿真。结果表明,相对于传统控制规律,滑模控制在无需得到电机精确模型的情况下能达到预期要求,并且有效地减小了电动机的转矩脉动。 关键词:开关磁阻电动机;滑模变结构控制;鲁棒性;趋近率;PI控制
Abstract: Presented a sliding mode control method was in this paper for the characteristic of highly nonlinear and difficult to get accurate model of switched reluctance motor.It restricted system state in the switch surface by the selection of switch surface and approximation law without accurate system model,and forced the state reach the origin eventually.Also presented an improvement for the general exponential approximation law in the paper.The simulation result show that the sliding mode control can get the anticipative system performance without the accurate model of motor,and reduces motor torque ripple effectively. Key Words: Switched reluctance motor;Variable-structure control with sliding mode;Robustness;Approximation law;PI control
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