Danfoss pved-cl, Operation Manual, Page: 5 / 116

Ramps with Fixed Ramp Times................................................................................................................................................. 44
Example: ......................................................................................................................................................................................45
Example: ......................................................................................................................................................................................46
Select Ramps with Ramp Times Related to Vehicle Speed.............................................................................................46
Example: ......................................................................................................................................................................................48
Example: ......................................................................................................................................................................................48
Anti-jerk Ramp Parameter Tuning Guide.........................................................................................................................49
Soft (Cushion) End-stop...............................................................................................................................................................49
Main Spool Dead-band Control Function.............................................................................................................................50
Dead-band Jump Control......................................................................................................................................................50
Dead-band Hold and Proportional Control.................................................................................................................... 50
Responding to Flow Requests after Tolsout...................................................................................................................50
Magnetic Valve Control............................................................................................................................................................... 50
Steering by Steering Wheel – Closed Loop
Steering by Steering wheel – Closed Loop...........................................................................................................................52
Functionality Tree.......................................................................................................................................................................... 52
Select the Control Principle........................................................................................................................................................53
Acquire the Signals.................................................................................................................................................................. 53
Apply Backlash...........................................................................................................................................................................53
Steering Sensitivity........................................................................................................................................................................53
Select a Fixed Steering Sensitivity........................................................................................................................................... 54
Select a Sensitivity with Relation to Vehicle Speed...........................................................................................................54
Create the Set-point......................................................................................................................................................................55
Closing the Loop............................................................................................................................................................................ 56
Feed-forward..............................................................................................................................................................................56
Steady State Error..................................................................................................................................................................... 56
To achieve steady state accuracy:.......................................................................................................................................56
Proportional Band.................................................................................................................................................................... 56
Steering Wheel Knob Position Control.................................................................................................................................. 57
What makes the steering wheel drift?.............................................................................................................................. 58
Eliminate Noise due to Frequent Pressure Build-up......................................................................................................... 58
Magnetic Valve Control............................................................................................................................................................... 58
Steering by High Priority Steering Device – Open Loop
Steering by High Priority Steering Device – Open Loop..................................................................................................60
Functionality Tree.......................................................................................................................................................................... 60
Select the Control Principle........................................................................................................................................................60
Acquire the Signals.................................................................................................................................................................. 61
Set-point Transfer Function....................................................................................................................................................... 61
Steering Sensitivity........................................................................................................................................................................62
Select a Fixed Sensitivity............................................................................................................................................................. 62
Select a Sensitivity with Relation to the Actuator Position.............................................................................................63
Select a Sensitivity with Relation to Vehicle Speed...........................................................................................................63
Ramps (Anti-Jerk)........................................................................................................................................................................... 64
Select Ramps with Fixed Ramp Times....................................................................................................................................65
Example: ......................................................................................................................................................................................65
Example: ......................................................................................................................................................................................66
Select Ramps with Ramp Time Related to Vehicle Speed...............................................................................................66
Example: ......................................................................................................................................................................................68
Example: ......................................................................................................................................................................................68
Anti-jerk Ramp Parameter Tuning Guide.............................................................................................................................. 69
Soft (Cushion) End-stop...............................................................................................................................................................69
Spool Dead-band Hold Control Function ............................................................................................................................ 70
Dead-band Jump Control......................................................................................................................................................70
Dead-band Hold and Proportional Control.................................................................................................................... 71
Responding to Flow Requests after Tolsout...................................................................................................................71
Magnetic Valves OFF Control.................................................................................................................................................... 71
Resolving a Steering Control Conflict............................................................................................................................... 71
Steering by High Priority Steering Device – Closed Loop
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Contents
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