Page 588 - Mechanical Engineers' Handbook (Volume 2)

7 Hydraulic Servomotors 579

Figure 28 Nomenclature of hydraulic servomotors.

Linear Servomotor (Balanced Design)
Force balance
dV 1
(AP BV F F F ) (38)
dt M a m m ƒ c e
Chamber continuity
( ) d
Q 1 2 Q ( V ) (39)
1
L
1
11
2 dt
2 Q Q de ( V ) (40)
1
2 L 2 2 dt 2 2
Equation of state
d 1 dP 1
1
dt dt (41)
d 2 dP 2 (42)
2
dt dt
Chamber volume
V V AY (43)
1i
1
or
dV 1 AV
dt
V V AY (44)
2
2i
or