基于Hamilton理论的冷带轧机速度张力系统非奇异快速终端滑模控制

针对交流异步电机驱动的冷带轧机速度张力系统的跟踪控制问题,给出一种基于Hamilton理论的非奇异快速终端滑模控制器设计方法.首先,设计了一种新型扰动观测器对系统中由参数摄动和负载扰动引起的不确定项进行观测;其次,通过预反馈控制建立了冷带轧机系统速度张力磁链外环的耗散Hamilton模型,进而基于互联–阻尼配置及能量整形方法完成耗散Hamilton控制器的设计;再次,基于串级控制思想完成了冷带轧机系统电流内环非奇异快速终端滑模控制器的设计.通过理论分析证明了所提控制方法能够保证闭环系统全局稳定.最后,基于某交流异步电机驱动的冷带轧机系统的现场实际数据进行仿真对比研究,仿真结果验证了本文所提方法的有效性.

Nonsingular fast terminal sliding mode control for the speed and tension system of cold strip rolling mill based on Hamilton theory

Aiming at the tracking control problem of the speed and tension system of reversible cold strip rolling milldriven by alternating current (AC) asynchronous motors, a design method of nonsingular fast terminal sliding modecontroller is proposed based on Hamilton theory. Firstly, the initial disturbance observers are designed to observe the uncertaintiescaused by parameter perturbations and load perturbation in the system. Secondly, the dissipative Hamilton modelof the outside loop of the speed tension and flux in cold strip rolling mill system is established through the pre-feedbackcontrol, and then the dissipative Hamilton controllers are designed based on the interconnection-damping configuration andenergy shaping method. Thirdly, the nonsingular fast terminal sliding mode controllers for the current inner loop of coldstrip rolling mill system are designed based on the cascade control idea. Theoretical analysis proves that the proposed controlmethod can ensure the global stability of the closed-loop system. Finally, the simulation comparative study is carriedout based on the field actual data of a cold strip rolling mill system driven by AC asynchronous motors, and the simulationresults verify the effectiveness of the proposed method.