基于非线性滑模面的多PMSM变结构同步控制

Sliding Mode Variable Structure Synchronous Control for Permanent Magnet Synchronous Machines Based on Nonlinear Sliding Surface

针对目前广泛应用饱和函数来削弱多电机线性滑模变结构同步控制的抖振时,同步控制的精度和削弱抖振之间的矛盾,提出了非线性滑模面变结构控制,这种控制方法在运用饱和函数削弱抖振的同时保证了同步控制的精度。建立了基于耦合补偿原理的多电机相邻交叉耦合环形系统。并将基于相邻交叉耦合环形系统的非线性滑模面变结构控制分别与同样基于此的线性滑模面变结构控制和PID控制进行对比,结果表明非线性滑模面变结构同步控制系统,具有更高的同步控制精度、更强的削弱抖振能力,同时系统的鲁棒性也较高。

Currently, saturation function is widely used to weaken the chattering of sliding mode variable structure syn- chronization control. But this kind of method exists contradiction in ensuring control accuracy to weakening the chattering. For solving this problem, the nonlinear sliding mode variable structure control was proposed. The combination of the nonlin- ear sliding surface and the saturated function not only can weaken the chattering, but also can ensure the control precision. Then multi-motor adjacent cross coupling ring system was established. The ring system was based on the principle of cou- pling compensation. Compare nonlinear sliding mode variable structure control based on adjacent cross coupling ring system with linear sliding mode variable structure control and PID control which were based on same system. The results show that nonlinear sliding surface sliding mode variable structure synchronous control can effectively weaken the chattering and guar- antee control precision. And the whole system has stronger robustness.