About this product 25/104
RE 92076-01-B/10.2017, A4... with HS5E pilot control valve/Series 3x, Bosch Rexroth AG
In general, for the transition of a system from a given initial state to a given final
state, a fast transition as well as a stable state are aimed for. Various control
algorithms are used in control engineering to implement these requirements.
The HS5E digital controller has four sets of control parameters to allow optimum
adjustment to plant-specific requirements. For this, up to four instances of the
relevant parameters for control are created in the HydraulicDrive after activation
of the respective set of control parameters. The setting of the individual controller
parameters depends on the control properties of the overall system. In this
connection, you must take into account the following factors:
• The hydraulic layout of the system (e.g. piping, branches)
• The connected oil volume
5.3.1 Parallel control structure
The control structure below is used in the HydraulicDrive:
Fig. 3: Overview of controller parallel structure
The parallel structure with the pressure and swivel angle controllers is called in the
“Pressure and swivel angle control” or “Pressure/flow control” operating modes.
The swivel angle command value is adapted in swivel angle command value
processing before it is passed on to the actual swivel angle controller.
For pump control, the pressure and swivel angle controllers are active at the same
time and both generate a manipulated variable. In the pump switching logic, the
system passes on as standard the lowest manipulated variable from these two
controllers (minimum value former). Using this minimum value former ensures that
only one of these two pressure or swivel angle variables is ever regulated and that it
is possible to switch between both control modes. It is possible to modify the output
P-0-2954
P-0-2956
α
actual
actual
actual
actual
P-0-2914
S-0-0882
P-0-2957.0.6
P2958.0.1
S-0-0809
α
.
p
p
.
P-0-2972
P-0-2803
[%]
[bar]
[%]
[bar]
[%]
[%]
[%]
[%]/s
[bar]/s
[%]
P-0-2951 Bit 9
P-0-2992
P-0-2986
P-0-2952
Swivel angle
command value
Torque limitation
of pump
Swivel angle
command
value
processing
Swivel angle
controller
XREG VREG Valve
controller
(100us)
Pressure
controller
Swivel angle
actual value
Actual pressure
value
Pressure sign
Derivation of
actual swivel angle
value
Derivative of actual
pressure
value
Pressure command
value of controller
Only relevant with closed circuit BIT sign:
0: if actual pressure value B > actual
pressure value A
1: if actual pressure value B < actual
pressure value A
Actual value acquisition
Changeover
logic of pump
Parallel
Manipulated
variable adjust-
ment of pump
Valve
controller
To Next Page
Loading...
Need help?
General
