供电切换 meaning in Chinese

power switchover

First , because pipelines are so complex that controlled object is high order , delay , coupling , nolinear and time - varing , it is difficult to realize closed loop control for it using valid mathematic model . to resolve this problem , the paper presents a fuzzy - pid control algorithm with self - adjusting regulation factor . second , if a moving motor supplied by inverter power is switched to be supplied by power supply , the impact of overload - voltage and overload - current appears
主要针对中、大容量供水系统中，由于供水管网铺设复杂、弯管多、控制对象具有高阶、滞后、耦合、非线性及参数时变的特点，难以利用有效的解析式数学模型进行闭环控制，以及多台水泵并联运行时，水泵电机由变频电源供电向工频电源供电切换过程中产生的过电压过电流冲击这两个难题，提出了可调整因子fuzzy - pid控制算法及利用锁相环控制实现水泵电机由变频电源向工频电源的同频同相平滑切换。