论文部分内容阅读
电液力控制系统中由于柔性负载的存在 ,传递函数的分子中通常含有一个振荡频率很低的二阶微分环节 ,这不仅严重影响系统的频宽 ,而且易使系统特性趋于振荡甚至不稳定 .同时 ,典型的电液力控制系统属于奇异H∞ 问题 ,传统的H∞ 控制算法无法求解该问题 .为了提高系统的频宽 ,获得希望的系统特性 ,结合液压式全自动地震波输入振动三轴装置 (以下简称动三轴 ) ,采用基于线性矩阵不等式 (LMI)的H∞ 控制方法进行求解 ,并给出了控制器的具体推导过程和求解过程 .在文章的最后还给出了动三轴在基于LMI的H∞控制器作用下的仿真结果 .结果表明 ,基于LMI的H∞ 控制对改善动三轴的性能是非常有效的
Due to the existence of flexible load in the electro-hydraulic control system, the transfer function usually contains a second-order differential component with low oscillation frequency, which not only seriously affects the system bandwidth, but also tends to make the system characteristics oscillate or even unstable At the same time, the typical electro-hydraulic control system belongs to the singular H∞ problem, and the traditional H∞ control algorithm can not solve the problem.In order to improve the system bandwidth and obtain the desired system characteristics, combined with hydraulic automatic seismic wave input vibration triaxial Device (hereinafter referred to as moving triaxial) is solved by the H∞control method based on linear matrix inequality (LMI), and the derivation process and solving process of the controller are given.At the end of the paper, The simulation results under the HMI controller based on LMI show that the HMI control based on LMI is very effective in improving the performance of moving triaxial