双电机传动定速比控制的反馈线性化方法

Feedback Linearization of Constant Ratio Control of Mechanical Systems with Dual Motor Drives

针对三相异步电动机系统这一非线性、多变量、强耦合的控制对象，利用非线性几何理论中的反馈线性化方法，实现系统的精确解耦和全局线性化，从而可以利用线性控制理论对分解出来的线性化的转速子系统和转子磁链子系统进行控制，因而比较容易实现定速比控制．利用数字仿真可以证明这一方案是可行的，且系统具有良好的静、动态性能．

The dynamic model of induction motor is a nonlinear multivariable system with strong coupling.In this paper,the theory of feedback linearization for nonlinear systems is applied to the implementation of exact decoupling and linearization. The regulators of the linear subsystems of rotor speed and rotor flux linkage can be designed with linear theory,so the constant ratio control can be easily realized. Simulations showed the good static/dynamic performance of proposed control scheme.