Full-Vehicle Analysis: Lift-Off Turn-In

Full-Vehicle Assembly

Select the Full-Vehicle Assembly you want to analyze. The menu lists all full-vehicle assemblies currently open in your session.

Assembly Variant

Select the assembly variant you want to analyze. The menu lists all full-vehicle assembly variants of the chosen assembly.

Switches to the selected variant and adds the required testrig as needed.

Output Prefix

Enter a string that specifies the Analysis Output Name. The string can contain only alphanumeric characters and underscores (_). Adams Car appends the suffix _lti to form the complete analysis name. For example, if you enter test_45 as the output prefix, the analysis name becomes test_45_lti.

Solver Settings File

Select one or more files (extension .ssf) defining the solver settings to be temporarily applied for this simulation (optional).

Opens the Solver Settings File (extension .ssf) editor dialog box.

Simulation Mode

Select interactive, background, graphical, event or files only.

See Mode of Simulation: Interactive, Mode of Simulation: Graphical, Mode of Simulation: Background, Mode of Simulation: Files_only, Mode of Simulation: Event_only.

Enter the name of a file that contains road data information. The tire subsystems use this information to calculate the tire/road interaction forces.

Tips on Entering File Names in Text Boxes

Import and visualize road graphics from file.

Remove road or path graphics.

View road / path file in info window.

Edit road / path file in road builder or text editor.

Number of Steps / Step Size / Step Frequency

Select either of the following:

Gear Position

Specify the initial gear position for the analysis.

Suggested Gear Position based on desired Initial Velocity (or equivalent lateral acceleration and curvature radius for constant radius cornering events). The button suggests the gear position for the event in order for the engine speed to be in the range between stall speed and max revolution limit.

Lateral Acceleration

Specify the target lateral acceleration that will be achieved at the start of the lift-off turn-in analysis.

Turn Radius

Enter the turn radius (in length units) of the skidpad on which the vehicle will perform the analysis.

Length Units

Select the length units for the turn radius.

Turn Direction

Select a right or a left turn.

Steering Delay

Enter the time that is elapsed between the achievement of the desired lateral acceleration and the additional steering ramp input.

Steering Ramp

Enter the rate at which the steering value will change; for example, 60 deg/s.

Throttle Delay

Specify the delay of the throttle signal. The first mini-maneuver end condition is based on lateral acceleration. After the end of the mini-maneuver, throttle lift-off takes place with the specified delay.

Throttle Step Duration

Specify the duration of the throttle step signal. The throttle is stepped down to zero in the specified amount of time.

Disengage Clutch during Lift-Off

Select it if you want ADA MS/Car to step the clutch signal to one (disengaged clutch) with the specified parameters of delay and step duration.

Clutch Delay

Specify the delay of the clutch signal activation after the end of the steady-state cornering prephase maneuver.

Clutch Step Duration

Specify the duration of the clutch step signal. The clutch signal is stepped down from zero to one (clutch disengaged) in the specified amount of time.

Quasi-Static Skidpad Setup

Select to perform a quasi-static prephase analysis before running the transient analysis on your full-vehicle assemblies.

If you do not select this option, Adams Car performs a SETTLE analysis.

For more information about the different quasi-static setup method keywords (such as SETTLE and STRAIGHT), see Structure of Event Files.

Entry Distance

Enter a numerical value that defines the initial straight-line section of the analysis. From the pull-down menu, select the units that define the entry distance units.

Settle Time

Enter a period of time during which the vehicle must maintain a steady-state condition. For example, if you selected a lateral acceleration of 0.5 g, the settle time would be the time where this acceleration must be maintained with a 2% tolerance before the end condition can be triggered.

Create Event Log File

Select if you want Adams Car to write information about the assembled model and analysis to an Analysis Log File.

Add Vehicle Dynamics Requests

Activates requests computing certain vehicle dynamics outputs during the full vehicle event.

Some of these additional requests are required for standard post-processing (reports and plots).

Compute Characteristic Values

Activates requests computing suspension and steering characteristics during the full vehicle event.

The additional requests are equivalent to those previously already available for suspension analysis.

See Output of Suspension Analyses in Adams Car - Running Analysis for more details.

Select to display a dialog box where you can add multi-line comments to any entity, to describe its purpose and function. Adams Car displays different comments dialog boxes, depending on the entity type for which you want to record comments:

Learn about Recording Comments.

Select to display an Alignment dialog box where you can set toe, camber and caster alignment values.

Construct road graphics from event user inputs.