[例1]绘制方块图 u Ri+uo %=油 LT U,(s)=RI(s)+U(s) U.s)=11s) Cs School of Mechanical Engineering ME369-Lecture 4.2 Shanghai Jiao Tong University Fall 2015 例2]绘制方块图 ●● dx0=f0-f。-f 1 M X(s)=- d F()5()-F( 方=B「4@_40l F(s)=Bs[X (s)-X(s)] dt」 LT f人=K[x0-x E(5)=K[X(s)-X2(s)] M. (D=f+fe-f 1 X,(s)= dr 5(+5()-5 Ik:=K2x2(t) Fk,(s)=K2X2(s) School of Mechanical Engineering ME369-Lecture 4.2 Shanghai Jiao Tong University Fall 2015 33 ME369-Lecture 4.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University [例1]绘制方块图 i 0 u Ri u   0 1 u i t d C   LT ( ) ( ) ( ) U s RI s U s i o   1 ( ) ( ) c I s U s C s  ME369-Lecture 4.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 1 2 1 1 2 ( ) ( ) B K d x t M f t f f dt    1 2 ( ) ( ) B dx t dx t f B dt dt           1 1 1 2 ( ) ( ) K f K x t x t   1 2 2 2 2 2 ( ) B K K d x t M f f f dt    2 2 2 ( ) K f K x t  1 1 2 1 1 ( ) [ ( ) ( ) ( )] X s F s F s F s B K M s    1 2 ( ) [ ( ) ( )] F s Bs X s X s B   1 1 1 2 ( ) [ ( ) ( )] F s K X s X s K   1 2 2 2 2 1 ( ) [ ( ) ( ) ( )] X s F s F s F s B K K M s    2 2 2 ( ) ( ) F s K X s K  LT [例2]绘制方块图