Hiwin D1-N Series - Bode Plot

D1-N Series Servo Drive User Manual Operation Principles
HIWIN MIKROSYSTEM Corp. 3-11
MD17UE01-1906
3.6.2 Bode plot
Figure 3.6.2.1 Gain margin and phase margin in Bode plot
As figure 3.6.2.2, the bandwidth of Bode plot is at -3 dB.
Figure 3.6.2.2 Bandwidth of Bode plot
0 dB
-3 dB
Bandwidth
Gain (dB)
f
40
20
0
-20
-40
-60
-360
0
-90
-180
-270
Gain crossover
g
ω
p
ω
Phase crossover
Gain margin
Phase
margin
)()( dBjG ω
(deg)
)
(
ω
j
G
∠
sec)
/
(
rad
ω
sec)
/
(
rad
ω