具有输入饱和的轧机液压伺服系统鲁棒动态输出反馈控制

针对具有状态不可测、参数不确定和输入饱和的轧机液压伺服位置系统,提出一种基于anti-windup的抗饱和鲁棒动态输出反馈控制算法.首先,应用Finsler引理,将闭环系统稳定的充分条件转化为LMI条件,并解得控制器参数矩阵;然后,综合考虑系统的干扰抑制能力和稳定域大小,求解优化问题,得到anti-windup增益矩阵.可以证明,所设计的控制器能够保证闭环系统一致有界稳定,并具有鲁棒 ∞性能.将所提出的算法应用于某650 mm可逆轧机液压伺服位置系统中进行仿真,其结果验证了所提出算法的有效性.

Robust dynamic output-feedback control of hydraulic servo system with input saturation for rolling mill

An anti-windup-based robust dynamic output feedback control algorithm is presented for hydraulic servo position
system with unmeasurable states, uncertain parameters and input saturation in a rolling mill. Firstly, a sufficient condition
of stability can be transformed into a linear matrix inequality(LMI) condition by using Finsler’s lemma, and the controller
parameter matrices are obtained by solving LMIs; Secondly, by compromising the disturbance attenuation and stability
region, the anti-windup matrix is obtained by solving a convex optimization problem. It can be proved that the proposed
method can guarantee the closed-loop system is uniformly bounded stable and possesses robust ??∞ performance. Finally, a
simulation is carried out on the hydraulic servo position system of 650mm reversing cold-strip rolling mill, the simulation
results show the validity of the proposed algorith