evthelp_3droad.htm

A 3D road full-vehicle event simulates your vehicle assembly using a three-dimensional road representation. The road file (.rdf) is used by both the tire subsystems to compute contact patch forces/moments, and by the lateral controller. The standard driver interface (SDI) uses path information contained in the 3D road file to drive the vehicle along the specified course. An example 3D road file is distributed in the shared car database (mdi_3d_smooth_road).

For the option:	Do the following:
Remembering	Select if you want to use knowledge from a previous analysis. By selecting this option, the Knowledge ID (.kno) text box appears.
Learn Type	Select one of the following: • Vehicle Limits • Dynamic Response • Limit and Dynamic Response • Maximum Speed • No Learning
Start Time	Enter a real value that specifies the time at which the speed controller is to start.
End Time	Specify the time, in seconds, at which the analysis ends.
Number of Steps	Specify the number of output steps.
Initial Velocity	Enter the initial speed of the vehicle.
Learned Results ID	(Not available for No Learning.) Specify a unique identifier for the knowledge file.
Write Knowledge File	(Not available for No Learning.) Select one: • Once - Records the information after each lap in the same knowledge file • At End of Each Lap - Records the information after each lap in different files with a timestamp as an additional file extension • Every A/Driver Update - Records the information after each knowledge update in different files with a timestamp as an additional file extension
Driver File (.din)	Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.
Road Data File (.rdf)	Use the Find tool to select a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Knowledge ID (.kno)	(Only available if you selected Remembering.) Use the Find tool to select a file (.kno) that contains knowledge from a previous analysis.
Road/Testrig Data File	Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Front Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Rear Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Current Field Unit	Displays the current units setting for a text box you select in the dialog box.
Use Personal Files	Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generates.

For the option:

Do the following:

Remembering

Select if you want to use knowledge from a previous analysis.

By selecting this option, the Knowledge ID (.kno) text box appears.

Learn Type

Select one of the following:

• Vehicle Limits

• Dynamic Response

• Limit and Dynamic Response

• Maximum Speed

• No Learning

Start Time

Enter a real value that specifies the time at which the speed controller is to start.

End Time

Specify the time, in seconds, at which the analysis ends.

Number of Steps

Specify the number of output steps.

Initial Velocity

Enter the initial speed of the vehicle.

Learned Results ID

(Not available for No Learning.) Specify a unique identifier for the knowledge file.

Write Knowledge File

(Not available for No Learning.) Select one:

• Once - Records the information after each lap in the same knowledge file

• At End of Each Lap - Records the information after each lap in different files with a timestamp as an additional file extension

• Every A/Driver Update - Records the information after each knowledge update in different files with a timestamp as an additional file extension

Driver File (.din)

Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.

Road Data File (.rdf)

Use the Find tool to select a road data file that contains road data information.

The tire subsystems use this information to calculate the tire/road interaction forces.

Knowledge ID (.kno)

(Only available if you selected Remembering.) Use the Find tool to select a file (.kno) that contains knowledge from a previous analysis.

Road/Testrig Data File

Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.

Front Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Rear Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Current Field Unit

Displays the current units setting for a text box you select in the dialog box.

Use Personal Files

Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generates.

For the option:	Do the following:
Speed Control	Select one of the following: • DCD File - Allows you to control the longitudinal dynamics of the vehicle assembly using a driver data file. • Longitudinal Accel - Lets you specifically define a longitudinal acceleration value.
If you select DCD File, Adams/Chassis displays the following options:
End Time	Specify the time, in seconds, at which the analysis ends.
Number of Steps	Specify the number of output steps.
Initial Velocity	Enter the initial speed of the vehicle.
Learned Results ID	(Not available for No Learning.) Specify a unique identifier for the knowledge file.
Driver File (.din)	Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.
Road Data File (.rdf)	Use the Find tool to select a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Knowledge ID (.kno)	(Only available if you selected Remembering.) Use the Find tool to select a file (.kno) that contains knowledge from a previous analysis.
Driver File (.din)	Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.
Road/Testrig Data File	Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Front Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Rear Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Current Field Unit	This displays the current units setting for a text box you select in the dialog box.
Use Personal Files	Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generates.
If you select Longitudinal Accel, Adams/Chassis displays the following options:
Start Time	Enter a real value that specifies the time at which the speed controller is to start.
End Time	Specify the time, in seconds, at which the analysis ends.
Number of Steps	Specify the number of output steps.
Initial Velocity	Enter the initial speed of the vehicle.
Learned Results ID	(Not available for No Learning.)
Longitudinal Accel	Enter the longitudinal acceleration of the vehicle in g’s.
Road Data File (.rdf)	Use the Find tool to select a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Road/Testrig Data File	Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.
Front Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Rear Auto-Alignment	Select if you want to specify the front suspension alignment settings. You then specify: • Total Toe • Average Caster • Caster Split • Average Camber • Camber Split For more information, see auto-aligner.
Current Field Unit	This displays the current units setting for a text box you select in the dialog box.
Use Personal Files	Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generated.

For the option:

Do the following:

Speed Control

Select one of the following:

• DCD File - Allows you to control the longitudinal dynamics of the vehicle assembly using a driver data file.

• Longitudinal Accel - Lets you specifically define a longitudinal acceleration value.

If you select DCD File, Adams/Chassis displays the following options:

End Time

Specify the time, in seconds, at which the analysis ends.

Number of Steps

Specify the number of output steps.

Initial Velocity

Enter the initial speed of the vehicle.

Learned Results ID

(Not available for No Learning.) Specify a unique identifier for the knowledge file.

Driver File (.din)

Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.

Road Data File (.rdf)

Use the Find tool to select a road data file that contains road data information.

The tire subsystems use this information to calculate the tire/road interaction forces.

Knowledge ID (.kno)

(Only available if you selected Remembering.) Use the Find tool to select a file (.kno) that contains knowledge from a previous analysis.

Driver File (.din)

Use the Find tool to select a driver file that defines an open- or closed-loop speed controller.

Road/Testrig Data File

Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.

Front Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Rear Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Current Field Unit

This displays the current units setting for a text box you select in the dialog box.

Use Personal Files

Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generates.

If you select Longitudinal Accel, Adams/Chassis displays the following options:

Start Time

Enter a real value that specifies the time at which the speed controller is to start.

End Time

Specify the time, in seconds, at which the analysis ends.

Number of Steps

Specify the number of output steps.

Initial Velocity

Enter the initial speed of the vehicle.

Learned Results ID

(Not available for No Learning.)

Longitudinal Accel

Enter the longitudinal acceleration of the vehicle in g’s.

Road Data File (.rdf)

Use the Find tool to select a road data file that contains road data information.

The tire subsystems use this information to calculate the tire/road interaction forces.

Road/Testrig Data File

Select if you want to specify a road data file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.

Front Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Rear Auto-Alignment

Select if you want to specify the front suspension alignment settings. You then specify:

• Total Toe

• Average Caster

• Caster Split

• Average Camber

• Camber Split

For more information, see auto-aligner.

Current Field Unit

This displays the current units setting for a text box you select in the dialog box.

Use Personal Files

Select if you want to use customized files to define the simulation rather than the standard simulation that Adams/Chassis generated.