Danfoss pved-cl, Operation Manual

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Steering by High Priority Steering Device – Closed Loop ..............................................................................................72
Functionality Tree.......................................................................................................................................................................... 72
Tracking........................................................................................................................................................................................72
Select the Control Principle........................................................................................................................................................73
Acquire the Signals.................................................................................................................................................................. 73
Create the Set Point...................................................................................................................................................................... 73
Closing the Loop............................................................................................................................................................................ 74
Eliminate Noise due to Frequent Pressure Build-up......................................................................................................... 74
Magnetic Valves OFF Control ................................................................................................................................................... 74
Resolving a Steering Control Conflict............................................................................................................................... 75
High Priority Steering Device Enable/Disable Control..................................................................................................... 75
System Requirements............................................................................................................................................................. 75
Device Diagnostic Operation............................................................................................................................................... 76
Enable or Disable Joystick Steering Device.....................................................................................................................76
Boot-up State of Steering Device........................................................................................................................................76
Getting the Actual Enable/disable Status of the Device............................................................................................ 76
Steering by Low Priority Steering Device – Open Loop
Steering by Low Priority Steering Device – Open Loop...................................................................................................77
Functionality Tree.......................................................................................................................................................................... 77
Select the Control Principle........................................................................................................................................................77
Acquire the Signals.................................................................................................................................................................. 78
Set-point Transfer Function....................................................................................................................................................... 78
Steering Sensitivity........................................................................................................................................................................79
Select a Fixed Sensitivity............................................................................................................................................................. 79
Select a Sensitivity with Relation to the Actuator Position.............................................................................................80
Select a Sensitivity with Relation to Vehicle speed............................................................................................................80
Ramps (Anti-jerk)............................................................................................................................................................................81
Ramps with Fixed Ramp Times................................................................................................................................................. 82
Example: ......................................................................................................................................................................................82
Example: ......................................................................................................................................................................................83
Select Ramps with Ramp Time Related to Vehicle Speed...............................................................................................83
Example: ......................................................................................................................................................................................85
Example: ......................................................................................................................................................................................85
Anti-jerk Ramp Parameter Tuning Guide.............................................................................................................................. 86
Soft (Cushion) End-stop...............................................................................................................................................................86
Spool Dead-band Hold Control Function............................................................................................................................. 87
Dead-band Jump Control......................................................................................................................................................87
Dead-band Hold and Proportional Control.................................................................................................................... 87
Responding to Flow Requests after Tolsout...................................................................................................................87
Magnetic Valves OFF Control.................................................................................................................................................... 88
Resolving a Steering Control Conflict............................................................................................................................... 88
Steering by Low Priority Steering Device – Closed Loop
Steering by High Priority Steering Device – Closed Loop ..............................................................................................89
Functionality Tree.......................................................................................................................................................................... 89
Tracking........................................................................................................................................................................................89
Select the Control Principle........................................................................................................................................................90
Acquire the signals...................................................................................................................................................................90
Create the Set Point...................................................................................................................................................................... 90
Closing the Loop............................................................................................................................................................................ 91
Eliminate Noise due to Frequent Pressure Build-up......................................................................................................... 91
Magnetic Valves OFF Control.................................................................................................................................................... 92
Resolving a Steering Control Conflict............................................................................................................................... 92
Low Priority Steering Device Enable/Disable Control...................................................................................................... 92
System Requirements............................................................................................................................................................. 92
Device Diagnostic Operation............................................................................................................................................... 92
Enable or Disable Joystick Steering Device.....................................................................................................................93
Boot-up State of Steering Device........................................................................................................................................93
Getting the Actual Enable/disable Status of the Device............................................................................................ 93
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Contents
6 | © Danfoss | May 2016 11025583 | AQ00000216en-US0302