[例3]绘制方块图 i 4 C u,0-4@=i0 U,(s)-U,(5)=I(s) R R 40-2c0-0池 LT )=4- Cs 4①-.@=i,(0 Us)-U@=1,s) R E ()-fi(d 0 U(s)=- School of Mechanical Engineering ME369-Lecture 4.2 Shanghai Jiao Tong University Fall 2015 例3]绘制方块图（续） U,(s)-U(s) U(s)-U.(s =1,(s) R =1s) R Us=4-s） U.=40 Cs Cs School of Mechanical Engineering ME369-Lecture 4.2 Shanghal Jiao Tong University Fall 2015 55 ME369-Lecture 4.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 1 1 1 ( ) ( ) ( ) r u t u t i t R   1 1 2 1 1 u t i t i t t ( ) [ ( ) ( )]d C    1 2 2 ( ) ( ) ( ) c u t u t i t R   2 2 1 ( ) ( )d c u t i t t C   1 1 1 ( ) ( ) ( ) U s U s r I s R   1 2 1 1 ( ) ( ) ( ) I s I s U s C s   1 2 2 ( ) ( ) ( ) U s U s c I s R   2 2 1 ( ) ( ) U s I s c C s  LT [例3]绘制方块图 ME369-Lecture 4.2 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 1 1 1 ( ) ( ) ( ) U s U s r I s R   1 2 1 1 ( ) ( ) ( ) I s I s U s C s   1 2 2 ( ) ( ) ( ) U s U s c I s R   2 2 1 ( ) ( ) U s I s c C s  [例3]绘制方块图（续）