信号与系统9-5.ppt

Chapter 9 The Laplace transform 9.8 System function and System response LTI system and its response Time response for single-sided or time-limited inputs Response of the LTI systems Example Response of the LTI systems General condition Natural response Transient response Forced response Stable response Transient time: Time constant of the system must be in the ROC of Time response for both-sided inputs Examples Can not get output! Time response for both-sided inputs Time response for both-sided inputs zero-state response: consider only input Time response for both-sided inputs zero-input response: don’t consider input will be determined by initial condition of the whole response ! Time response for both-sided inputs The frequency response of the system Each poles and zeros can be plotted as a vector in s-plane; The frequency response of the system Examples LPF HPF BPF