摘要
轧机速度系统通常由直流电机驱动,当具有基速以上的弱磁调速时,速度控制系统的开环放大系数将会由于Cmφ的变化和电机转动惯量等参数的摄动而产生较大范围内的变化,且在电流调节器和速度调节器设计时常忽略反电势闭环的影响,因此,速度控制系统具有较大的参数不确定性和一定的模型误差。另外,轧机速度系统的外界轧 制负载扰动具有较大的时变不确定性,因此,为使速度控制系统具有较好的鲁棒稳定性和干扰抑制性能,该文基于内模原理的H∞混合灵敏度控制方法设计了速度鲁棒跟踪控制器。仿真研究结果及与常规PI控制器效果的比较表明,所设计的速度控制系统具有优良的干扰抑制性能和鲁棒稳定性。
The rolling mill is often driven by DC motor. For the situation of speed adjusting with field weakening, the open-loop magnifying coefficient of speed control system is varying in relatively big range due to the variation of parameters of Cmφ and rotating inertia, and the closed-loop of back emf (electromotive force) is generally omitted at designing the current regulator and speed regulator. So speed control system has some parameter uncertainty and model error. In addition, the external rolling load disturbance of rolling mill speed system has relatively big time-varying uncertainty. In order to make the speed control system has better robust stability and disturbance attenuation performance, the controller of speed robust tracking is developed based on the inner mode principle and control method of mixed sensitivity. Simulation results and the comparison with the effect of general PI controller show that the speed control system designed has excellent disturbance attenuation performance and robust stability.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第5期100-103,共4页
Proceedings of the CSEE
基金
国家自然科学基金项目(60074022)
关键词
轧机速度系统
H∞鲁棒跟踪控制器
设计
弱磁调速
直流电机
Speed adjusting with field weakening
Speed control system
Robust tracking control
Inner mode principle
Closed-loop of back emf
