阶系统的阶跃响应(step response) tx+x=K,x(0)=Xp School of Mechanical Engineering ME369-Lecture 3.2 Shanghai Jiao Tong University Fall 2015 阶系统(Sencond order system)的自由响应((free response) +6x+25x=0,x(0)=1,(0)=-3 School of Mechanical Engineering ME369-Lecture 3.2 Shanghai Jiao Tong University Fall 2015 33 BE315-Lecture 3.3 Fall 2011 ME369 Lecture 3.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 0  x x K x x    , (0) 一阶系统的阶跃响应(step response) BE315-Lecture 3.3 Fall 2011 ME369 Lecture 3.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University x x x x x       6 25 0, (0) 1, (0) 3 二阶系统(Sencond order system)的自由响应(free response)