(P 2852.10 KpScale, P 2852.11 KpScaleNeg) for the positive and negative cylinder
directions can be used to influence the gain of the controller. KpScaleNeg becomes
active with the bit for the negative cylinder volume (P 2863 Hyd_TabCtrl Bit 0).
NOTE
l
In this control mode, the volumetric flow rate and pressure
limitation are not active.
Image 7.73: Control structure, cylinder speed control without cylinder model and
leakage compensation
ID
Index Name
Unit
Description
2849
HYD_Lfe
Leakage flow estimation
2849
0
lfe_Qmin
l/min
Leakage Flow Estimator: Min value
2849
1
lfe_Qmax
l/min
Leakage Flow Estimator: Max value
2849
2
lfe_K
1/ms
Leakage Flow Estimator: Gain
2849
3
lfe_Tn
ms
Leakage Flow Estimator: Integrator time
constant
2850
HYD_PressCon
Pressure control parameters
2850
0
Kp
rpm/bar Gain
2850
1
KpScale
Gain scaling
Table 7.83: “Hydraulic - Speed control” parameters
MOOG
ID No.: CB40859-001 Date: 11/2020
MSD Servo Drive - Device Help
203
7 Control
ID
Index Name
Unit
Description
2850
2
Tn
ms
Integration time constant
2850
3
Tv
ms
Differential time constant
2850
4
Tp
ms
Integral-action time
2850
5
pMin
bar
Minimum permissible pressure
2850
6
pMax
bar
Maximum permissible pressure
2850
7
QMin
l/min
Minimum flow rate
2850
8
QMax
l/min
Maximum flow rate
2850
9
PressWindow
bar
Pressure control parameters
2850
10
decmpLvl
bar
Level for active decompression
2850
11
decmpRate
bar/s
Rate for active decompression
2850
12
pActScale
Scaling for pAct
2850
13
pAct2Scale
Scaling for pAct2
2850
14
pRange_k
%
Pressure range threshold
2850
15
pRange_midpoint
bar
Pressure range midpoint
2852
HYD_SpdCon
Speed Controller Parameters
2852
0
cylArea1
cm^2
Speed control parameter
2852
1
lfe_K_scale
Leakage Flow Estimator: Gain scaling
2852
2
cylArea2
cm^2
Cylinder displacement (option 2, use neg.
value for neg. direction)
2852
3
lfe_K_scale2
Leakage Flow Estimator: Gain scaling (option
2)
2852
4
res
Reserved
2852
5
res
Reserved
2852
6
res
Reserved
2852
7
unit_scale
um/rev Hydraulic physical unit scaling
2852
8
Kp
1/min
Speed control integration time constant
2852
9
Tn
ms
Speed control integration time constant
2852
10
KpScale
%
Speed control gain scaling
2852
11
KpScale2
%
Speed control gain scaling (option2)
Table 7.83: “Hydraulic - Speed control” parameters (continue)
7.11.10 Position control
Position control with volumetric flow feed forward control: