5 Characteristic Curves
Step response and frequency response
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 31
5.5 Step response and frequency response
1
Step response of the
spool stroke
Figure 13: Step response of the spool stroke
Frequency response of
the spool stroke
Figure 14: Frequency response of the spool stroke
1
Typical characteristic curves (measured with Mini DDV Amplifier G123-821
at 24 V, operating pressure p
P
= 140 bar (2,030 psi), viscosity of hydraulic
fluid
ν
= 32 mm
2
/s and temperature of hydraulic fluid T = 40 °C (104 °F))
spool str
oke [%]
time [ms]
amplitude
ratio [dB]
frequency [Hz]
phase lag [degr
ees]
