5.3开环系統的伯德图 Bode图绘制 10 10 GKS) (S+1)0.2s+1) S(0.2s+1) 20 20 20 [20 [40 [-40] 1800 1800 =1  = 5 [ 20] − [ 40] − -1800  =1  = 5 [ 20] − [ 40] − -1800 20 20 10 ( ) ( 1)(0.2 1) G s k s s = + + 10 ( ) (0.2 1) G s k s s = + 5.3 开环系统的伯德图 Bode图绘制