Connector Interface................................................................................................................................................................. 23

Valve Interface.................................................................................................................................................................................23

Valve calibration objectives.................................................................................................................................................. 23

Dead-band crossing.................................................................................................................................................................24

Valve types overview...............................................................................................................................................................24

Valve transfer function............................................................................................................................................................24

Valve interface parameters................................................................................................................................................... 25

Valve calibration methods..........................................................................................................................................................26

Method 1: Conservative software dead-band values..................................................................................................26

Example: Determine the general software dead-bands for a series of PVED-CL / EH valve with a

dynamic spool:...................................................................................................................................................................26

Method 2: Manual software dead-band calibration.................................................................................................... 26

Method 3: Valve auto-calibration....................................................................................................................................... 27

Preconditions:............................................................................................................................................................................ 27

Valve auto-calibration command parameters............................................................................................................... 27

Valve auto-calibration procedure.......................................................................................................................................28

Suggested valve auto-calibration command values................................................................................................... 29

Valve auto-calibration quick-guide......................................................................................................................................... 29

Valve auto-calibration procedure.......................................................................................................................................29

Parameter tuning order..........................................................................................................................................................29

Verification of auto-calibration result stability...............................................................................................................30

Verification of the open-loop performance.................................................................................................................... 30

Verification of the closed-loop performance..................................................................................................................30

Logging and monitoring........................................................................................................................................................30

Explanation: ............................................................................................................................................................................... 31

Mapping a Steering Device........................................................................................................................................................ 31

Only one signal per analogue channel can be acquired............................................................................................32

Analogue Interface........................................................................................................................................................................ 32

AD Signal Interface Requirements..................................................................................................................................... 33

Scaling Analogue Signals.......................................................................................................................................................33

Linear Transfer Characteristic (3-Point)............................................................................................................................ 33

Non-Linear Transfer Characteristic (5-Point).................................................................................................................. 34

Scenario.................................................................................................................................................................................. 34

Steering Actuator Position Signal.......................................................................................................................................34

Analogue Input Drift Compensation.................................................................................................................................35

Transmitting the Voltage Readings on CAN................................................................................................................... 35

Steering Device Transition..........................................................................................................................................................36

Threshold Definition..................................................................................................................................................................... 36

Define the Maximum Steering Motion Speed.....................................................................................................................36

Define the Steering Motion Threshold...................................................................................................................................37

Retrieving Steering Device Information................................................................................................................................ 38

Steering Wheel Sensor Noise Gate.......................................................................................................................................... 38

Example:.......................................................................................................................................................................................38

Steering by Steering Wheel - Open Loop.............................................................................................................................39

Acquire the Signals.................................................................................................................................................................. 39

Functionality Tree.......................................................................................................................................................................... 39

Open Loop Control........................................................................................................................................................................39

Select the Control Principle........................................................................................................................................................40

Apply Backlash...........................................................................................................................................................................40

Set-point Transfer Function....................................................................................................................................................... 40

Steering Sensitivity........................................................................................................................................................................41

Select a Fixed Sensitivity............................................................................................................................................................. 42

Select a Sensitivity with Relation to Actuator Position ....................................................................................................42

Select a Sensitivity with Relation to Vehicle speed............................................................................................................43

Ramps (Anti-jerk)............................................................................................................................................................................44

11025583 | AQ00000216en-US0302

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