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针对轧机液压伺服系统随工况变化而存在的弹性负载力和外负载力跳变所引起的结构跳变问题,建立并优化了考虑控制输入饱和特性的、系统连续工作时不同工况下的轧机液压伺服系统被控对象的多模型集.对每一模型采用线性矩阵不等式(LMI)方法设计了抗饱和状态反馈控制器,并制定了整个系统的切换策略,分析了具有饱和输入和外部扰动的切换系统的稳定性.对轧机液压伺服系统的仿真研究结果表明,本文所设计的控制系统具有良好的稳定性和动静态性能.
Aiming at the structural jump problem caused by the elastic load force and the transition of the external load force of the rolling mill hydraulic servo system with the change of working conditions, the rolling mill under different working conditions is established and optimized considering the saturated input characteristics of the control system The multi-model set of the controlled object of the hydraulic servo system is proposed.An anti-saturated state feedback controller is designed by using the linear matrix inequality (LMI) for each model and the switching strategy of the whole system is formulated, and the influence of the saturated input and the external disturbance Switching the stability of the system.The simulation research on the hydraulic servo system of the mill shows that the control system designed in this paper has good stability and dynamic and static performance.