1、 ua ur ucd () (1)a-d.b-c (2) 1-21-2 (1)abcd (2) a-d.b-c To Tiug uf u 1-4 0)( 0)()( yxfyk:B xyfxxk:A 12 111 fxkykkykkf12121 )( 2121 1 kkskkf sfk sX sY )()( )( 2-2(b) k 1 k 2 f x y ( b ) A B x1 2-2 2-2 ) 0 0 yk2yk c cr cr uiiR dti Cuu iRuu )( 1 212 2 11 2-2(c)() ccr cr cr cr uCuu Ruu RCuui Ruui )( )(
2、/)( 1 2 2 11 )(1 21 2 21 21 rrccuuCR RR R uuRRCRR 2121 221 21 21 21 221 1 )( )( RRCsRR RCsRR RR CsRR RR RCsRR sU sU r c uru c R 1 R 2 C i 1 i 2 i u C 2-2d R Ritutu dt tutud CdtRitud CCrCrC11)()()()()( 21 1 1 2 1 )( )()( )()( iii dt Ritud CiR Ritutu idt tutud CiC C C Cr Cr )( )( 2)( )()( 3)( 2 2 22 2
3、 2 22 tudttdu RCdttud CRtudttdu RCdttud CRrrrCCCR icCRu c d i 2 C u r i 1 rttrt c(t)=1-2e-2t+e-t, , 1 1 2 21 )(1/)(ssssCs,sR )2)(1( 23 )( )( )(sss sR sC sGtt ee ss LsGLtg 2114 24 1 1 )()(t2tee t th tg4 d)(d )(2-4 ( 3 s )(1 2 L 1 LL 2-5 uru c R 1 R 2 C i 1 i 2 i )()( )( 1 1 )( )()()()( sIRsUsU RCsR CsR CsR sU sIsUsUsU 2c 1 1 1 1 1 1 1cr 2-6 )(1)( )( 874321543632 4321 GGGGGGGGGGGG GGGG sR sC - G5 - G7 G8 -X1(s) G6 G3G1G2G4 R(s)C(s) - - X2(s) X3(s) G 2-7 R (s) G2 G2H G1 C (s) - a HG GG sR sC 2 21 1)( )( C (s)
