当传递函数难以表达成零极点形式时,则可以采用频率响应法。例如,数字计算机的控制系 统中(如Simulink)常见的纯滞后环节。如果纯滞后环节滞后时间为,则可由输入u(t) 得到输出y(t):

第一题: 1.y(t)=u(t-t) 使用拉式变换的定义: Y(s)=\u(t-r) 令T=t-T, Y(s)=Se-ru()= u()dt=(s) 所以,G(s)=ex

In order to be able to design a robust compensator to control a given pro cess, it is necessary not only to specify a nominal mo del of the process, but also the model uncert ainty to which the control sy stem has to be robust. The compensator is required to make the output follow variations in the reference signal and to attenuate disturbances. Hence to design the com- pensator

数据采集系统的组成结构 模拟信号调理 传统A/D转换器及接口技术 -型ADC原理与接口技术 数据采集系统设计及举例 数据采集系统的误差分析

液压动力元件(或称液压动力机构)是由液压放大元件(液压控制元件)和液压执行元件组成。有四种基本型式的液压动力元件：阀控液压缸、阀控液压马达、泵控液压缸、泵控液压马达。本章将建立几种基本的液压动力元件的传递函数，分析它们的动态特性和主要性能参数

圆柱滑阀结构型式、工作原理、静态特性 圆柱滑阀的结构型式及分类 一、按进、出阀的通道数划分 四通阀\\三通阀\\二通阀 二、按滑阀的工作边数划分 四边滑阀\\双边滑阀\\单边滑阀 三、按阀套窗口的形状划分 矩形、圆形、三角形等多种 四、按阀芯的凸肩数目划分 二凸肩、三凸肩、四凸肩

Above, analysis for multivariable control systems with respect to nominal and robust st ability as well as nominal and robust performan has been assessed. It was assumed that the spec- ifications for robustness were given in terms of weight matrices Wu(s) and Wu2(s), and that the performance specifications similarly were given by weight matrices Wpi(s) and Wp2()

There are two main limit ations in the use of Hoo theory for compensator design. First, only full complex perturb ations() Cnm can be treated in a non-conservative way in an Ho robust st ability test. Second, robust performance can only be handled in a conservative way even for full complex perturbations since st ability and performance can not be separated in the Hoo structure

绪言 典型输入信号 控制系统的时域性能指标 控制系统的稳定性和稳定判据 控制系统的稳态误差 控制系统暂态响应

线性定常齐次状态方程的解 矩阵指数函数-状态转移矩阵 线性定常系统非齐次方程的解 线性时变系统的解 离散系统状态方程的解 连续时间状态表达式的离散化