Siemens SINUMERIK 840D Description Of Functions page 255

Definition of Terms
A
D1, D2
d1, d2
f
0drive
f
0control
f
0valve
f
v
h
h
x
m
p
A
p
B
p
p
∆p
∆p
PA
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SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Cylinder piston surface
Cylinder piston diameter
Cylinder piston rod diameter
Natural frequency (resonant frequency) of hydraulic drive
Limit frequency that can be achieved by velocity-controlled drive
Natural frequency of servo solenoid valve
Limit frequency of servo solenoid valve
Cylinder stroke
Stroke at which min. natural frequency occurs
Mass on piston rod
Pressure at A end of cylinder
Pressure at B end of cylinder
Pump pressure
Pressure difference (rated pressure drop)
Pressure drop in the feed pipe
C
C-255