The frequency variation of electrical power system would have effect the veracity of electric parameter evaluation, and possibility effect characteristic of automatic equipment.
工频频率变化会影响电量计算的准确性，甚至会影响到电力自动化装置的工作性能。
2
At the same time, a robust adaptive controller is designed to make the servo system be robust to the parametervariation since the parameters of the servo system are time-varying.
同时针对控制系统的参数时常变化的特点，设计了鲁棒自适应控制器提高伺服系统对参数变化的鲁棒性。
3
It avoids identifying parmeter on line and can give a rather accurate servo tracking result and is fairly robust to systemparametervariation and load disturbance.