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针对全局滑模控制的动态滑模面不能在有限时间内演化为线性滑模面的缺点,提出一种改进的全局滑模控制方法,其动态滑模面的衰减函数由3个指数函数项组成一阶可导函数,并能在有限时间内衰减为零.这样,该方法不仅具有了全局滑模控制的全局鲁棒性,而且能够使动态滑模面在有限时间内演化为线性滑模面,从而加快了系统的响应速度.利用该方法实现了二阶电力系统的混沌控制,仿真结果验证了所提出方法的有效性.
Aiming at the shortcoming that dynamic sliding mode surface of global sliding mode control can not evolve into linear sliding mode surface in finite time, an improved global sliding mode control method is proposed. The damping function of dynamic sliding mode surface consists of three exponential function items First order derivative and can attenuate to zero in a finite time.Thus, this method not only has the global robustness of global sliding mode control, but also makes the dynamic sliding mode surface evolve into a linear sliding mode surface in finite time , Thus accelerating the response speed of the system.The chaos control of the second-order power system is realized by this method, and the simulation results verify the effectiveness of the proposed method.