ode Diagram 050 图5-19G1(s)和G1(s)的相角特性G(o)G2() 100 120 140 160120 Bode Diagram Frequency (rad/sec) Phase (deg) Magnitude (dB) -20 -15 -10 - 5 0 10 - 2 10 - 1 10 0 10 1 10 2 -180 -135 -90 -45 0 图 5-19 ( ) ( ) 1 1 G s 和G s 的相角特性 ( ) G1 j ( ) G2 j 10-2 10-1 100 101 102 -180 -160 -140 -120 -100 -80 -60 -40 -20 0