Full-Vehicle Analysis: Maintain
(Standard Interface) Simulate → Full-Vehicle Analysis → Straight-Line Events → Maintain
Runs a Straight-Line Maintain Analysis.
For the option: | Do the following: |
|---|---|
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 _brake to form the complete analysis name. For example, if you enter test_45 as the output prefix, the analysis name becomes test_45_brake. |
Solver Settings File | Select one or more files (extension .ssf) defining the solver settings to be temporarily applied for this simulation (optional). Note: Solver settings files are applied in the order specified, so if multiple .ssf files contain the same solver settings, the last file in the list determines those settings. |
 | Opens the Solver Settings File (extension .ssf) editor dialog box. |
End Time | Specify the time, in seconds, at which the analysis ends. |
Number of Steps / Step Size / Step Frequency | Select either of the following: ■Number of Steps: Specify the number of Output Steps. ■Step Size : Specify the size of the Output Steps. ■Step Frequency : Specify the number for the output frequency. |
Simulation Mode | Select interactive, background, graphical, event or files 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 You can also use a 3D road in this context. Make sure that the vehicle remains on the road, because 3D roads are not as wide as 2D flat roads. | |
 | 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. |
Desired Velocity | Enter the desired speed of the vehicle in the units specified in the pull-down menu to the right of the Desired Velocity text box. |
Maintain | Select the quantity to maintain during the transient analysis: ■Velocity - The longitudinal machine controller will be utilized to keep the vehicle at a constant speed. ■Throttle - Locks the throttle signal to the value determined by the static pre-phase. If Quasi-Static Straight-Line Setup is not selected, the vehicle will effectively coast with zero throttle. |
Gear Position | Specify the initial gear position for the analysis. The powertrain subsystem uses this parameter, which generally acts as a gain for the brake-demand output from the cruise control. The parameter is constant throughout 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. |
Steering Input | Select one of the following: ■straight line - The controller tries to maintain a straight line. ■free - Allows the steering wheel to rotate in response to forces transmitted to the steering subsystem from the tires and the suspension. ■locked - Locks the steering wheel at the design or static setup position. |
Quasi-Static Straight-Line Setup | Select to perform a quasi-static prephase analysis before running the transient analysis on your full-vehicle assemblies. Selecting this option causes Adams Car to perform a STRAIGHT (sometimes called ClearVision adjustment) analysis. 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. Note: You cannot select the Quasi-Static Setup option if: ■You do not have a powertrain subsystem in your vehicle assembly, because it is not possible to set the initial condition for the longitudinal or the lateral dynamics (throttle position). |
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. Note: This feature is only available for C++ Solver. |
 | 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: ■If recording comments for modeling entities in Standard Interface, Adams Car displays the Entity Comments dialog box. ■If recording comments for any other entity type, Adams Car displays the Modify Comment dialog box. 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. |