西安理工大学自动化与信息工程学院自动控制理论Chapter5 Frequency Response Method.pptVIP

Chapter 5 Frequency Response Method 5.1 Introduction 5.1 Introduction 5.1 Introduction 5.1.2 approaches to get the frequency characteristics 5.1.2 approaches to get the frequency characteristics In partial fraction form: 5.1.2 approaches to get the frequency characteristics Taking the inverse Laplace transform: 5.1.2 approaches to get the frequency characteristics 5.1 Introduction Examples 5.1.1 5.1 Introduction The frequency characteristic : 5.1 Introduction 5.1 Introduction 5.1.3 Graphic expression of the frequency response 5.1.3 Graphic expression of the frequency response 2. Polar plot 5.1.3 Graphic expression of the frequency response The shortage of the polar plot and the rectangular coordinates plot: to synchronously investigate the cases of the lower and higher frequency band is difficult. 5.2 Frequency Response of The Typical Elements The typical elements of the linear control systems — refer to Chapter 2. 5.2 Frequency response of the typical elements 2. Integrating element 5.2 Frequency response of the typical elements 3. Inertial element 5.2 Frequency response of the typical elements 4. Oscillating element 5.2 Frequency response of the typical elements The polar plot and the Bode diagram: 5.2 Frequency response of the typical elements 5. Differentiating element 5.2 Frequency response of the typical elements Because of the transfer functions of the differentiating elements are the reciprocal of the transfer functions of Integrating element, Inertial element and Oscillating element respectively, 5.2 Frequency response of the typical elements 5.2 Frequency response of the typical elements 6. Delay element 5.3 Bode diagram of the open loop systems 5.3.1 Plotting methods of the Bode diagram of the open loop systems Assume: 5.3 Bode diagram of the open loop systems G(s)H(s) could be regarded as: 5.3.2 Facility method to plot the magnitude response of the Bode diagram 5.3.2 Facility method to plot t