0←-K S3(K1=6.35) ↑jo j3.37 [s] j3 A5=0.5 j2 K→0 60 (K=6.35 j1(Ke=10) j0.52 * -3/ -1.5 1 0 S2 03 2. 7 （K1=6.35 -j1(Kre=10) -j2 K,→0 -j3 -j3.37 ∞←-K, S4(K5=6.35) 图6-18 例6-13的根轨迹图 2121  j [s] j3.37 j3 j2 j1 -j1 -j2 -j3 -j3.37 0 -0.3 -1 -2 -1.5 -3 -2.7 j0.52 ( =1 0) Kr c ( =1 0) Kr c 60A  = 0.5 Kr →  Kr →  P4 P3 P2 P1 2 1 S1 S2 S3 S4 ( 6.35) 1 Kr =( 6.35) 1 Kr = ( 6.35) 1 Kr = ( 6.35) 1   Kr Kr =   Kr 图 6 -18 例 6 -13的根轨迹图