Hybrid Mode Correction; Figure 23: Transfer Behavior Hybrid Mode / Solo Mode - Moog RKP-D User Manual

7 Pump functions

7.1.2.7 Hybrid mode correction

In the hybrid mode, a constant pump (typically not connected to the bus) and a solo pump operate to the
same volume. This functionality requires the knowledge of the constant pump's flow volume. This flow volume
(volume of the hybrid pump) is set with the parameter <HybridFlow> (0x2147) and is given as percentage of
the solo pump maximum volume.
Chapter "1.5 Definitions", page 3
The hybrid adjustment is done within the demand value generator before the position controller. The transfer
behavior is as follows:
Figure 23 shows the transfer behavior for the hybrid mode and also the solo mode for comparison purposes.
The calculation of the flow demand for the servo pump (servo demand) is as follows:
servo demand
flow of the
constant pump
(max. 80 % of the
servo pump)
Enabling hybrid operation
The hybrid mode is selected through the parameter <Mode> (0x2148). Writing the value 1 to the parameter
activates the hybrid mode. 0 means hybrid mode is deactivated. The hybrid mode can be activated/deacti-
vated for every parameter set by writing the corresponding value (0 or 1) to the subindexes (1...16) of 0x2148.
Description of parameter set switching:
Chapter "7.3 Analog parameter set switching", page 105
© Moog GmbH
×
output = input
×
total demand
=
resulting internal flow
demand for the servo pump
(servo demand)
100 %
16384

Figure 23: Transfer behavior hybrid mode / solo mode

USER MANUAL Firmware RKP-D (B99224-DV007-CE400; Version 1.1, 09/08)
( )
16384 + hybridflow –
⎛
flow constant pump
1 ------------------------------------------------------ -
+
⎝
16384
100 %
16384
Demand Value Generator
hybridflow
⎞
flow constant pump
–
⎠
flow demand to
the servo pump
(total demand)
65