【摘要】 针对具有执行机构饱和特性和有界干扰的轧机速度被控对象,给出了闭环系统满足不变性及L2干扰抑制性能的充分条件,然后基于线性矩阵不等式(LMI)方法设计了直流电机驱动的轧机速度系统状态反馈鲁棒控制器.仿真结果表明,所设计的轧机速度鲁棒控制系统跟踪误差随着饱和度λ的增大而增大.为保证系统具有优良的跟踪性能,通常选取较小的λ.所设计的状态反馈鲁棒控制系统具有较好的干扰抑制性能和鲁棒稳定性,对时变复合信号也能获得有效跟踪.更多还原

【Abstract】 Sufficient conditions to satisfy the invariance of closed-loop system and L2 performance of disturbance attenuation were presented for speed control system of rolling mill with actuator saturation and bounded disturbance.Then,the robust state-feedback controller was developed based on linear matrix inequality (LMI) for speed system of rolling mill driven by DC motor.The simulation results showed that the tracking error of speed robust control system increased with rise of saturation degree λ.To ensure that the system has excellent tracking performance,λ was often given small value.The designed robust state-feedback control system has better performance of disturbance attenuation and robust stability,and can trace time-varying composite signals effectively.更多还原