4.25. Vehicle Acceleration Controller - VehAccCtl

• Overview

• Functions

• Ports

• Parameters

• Configuration Guide

Id	VehAccCtl
Version	0.3.3.0
Title	Vehicle Acceleration Controller
System	Drivetrain
Document Type	Application Software Component Specification Preview

4.25.1. Overview

The Vehicle Acceleration Control software component determines the desired vehicle torque demand based on the vehicle longitudinal acceleration request. The vehicle longitudinal acceleration request to vehicle torque demand can be tuned via a 1-D lookup table. The software component performs the calibration parameters consistency check if the calibration is changed.

4.25.2. Functions

	Title	Description
1	Torque Demand Calculation	Calculates the desired vehicle torque demand based on accelerator pedal position using a lookup table. The lookup table maps pedal position to a torque demand value.
2	Torque Limiting	Limits the calculated torque demand based on the maximum available torque from the drivetrain (in drive) and the maximum available regenerative braking torque (in coast). This ensures the torque demand does not exceed physical limits.

4.25.3. Ports

	Id	Direction	Data Type	Dimensions	Unit	Description	Keywords
1	VehLgtAReq	Incoming	single	[1]	m/s/s	Expected signal: Vehicle Acceleration request. If signal is NA: mandatory	Vehicle Longitudinal Acceleration Request
2	VehDrvTqMax	Incoming	single	[1]	N*m	Expected signal: Max vehicle torque in drive If signal is NA: mandatory	Vehicle Drive Torque Maximum
3	VehRgnTqMax	Incoming	single	[1]	N*m	Expected signal: Max vehicle torque in regen If signal is NA: mandatory	Vehicle Regeneration Torque Maximum
4	VehacctlVehTqDmd	Outgoing	single	[1]	N*m		Vehacctl Vehicle Torque Demand
5	VehacctlSwcCfgVld	Outgoing	boolean	[1]	inherit		Vehacctl Swc Configuration Valid
6	VehacctlDiagc	Outgoing	Bus: VehacctlDiagc	[-1]	inherit		Vehacctl Diagnostic

4.25.4. Parameters

	Id	Data Type	Dimensions	Range	Unit	Description	Keywords
1	VehacctlTqLgtATblBreakPnt	single	[1,19]	Min: -100, Max: 100	m/s/s	Table breakpoints for Torque vehicle acceleration control	Vehacctl Torque Longitudinal Acceleration Table Break Point
2	VehacctlTqLgtATblDa	single	[1,19]	Min: -1, Max: 1		Table data for Torque vehicle acceleration control	Vehacctl Torque Longitudinal Acceleration Table Data

4.25.5. Configuration Guide

The VehAccCtl component provides open-loop mapping of vehicle longitudinal acceleration request to the vehicle torque demand. The component gives additional flexibility in shaping vehicle torque demand.

4.25.5.1. Step 1 - Calibrate Torque-Acceleration Mapping

Set VehacctlTqLgtATblBreakPnt to define the breakpoints for vehicle longitudinal acceleration mapping. Set VehacctlTqLgtATblDa to define the corresponding torque demand values for each breakpoint.