Hiwin D2 Series - Bode Diagram

D2 Series Servo Drive User Manual Operation Principles
HIWIN MIKROSYSTEM CORP. 3-11
MD07UE01-2005
3.6.2 Bode diagram
The gain margin and phase margin of Bode diagram are given in figure 3.6.2.1.
Figure3.6.2.1 Gain margin and phase margin of Bode diagram
The bandwidth of Bode diagram is defined as the frequency at -3 dB, as shown in figure 3.6.2.2.
Figure3.6.2.2 Bandwidth of Bode diagram
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