Adams Car Package > Adams Car > Dialog Box - F1 Help > Automatic Mass Adjustment

Automatic Mass Adjustment

Setup → Mass Properties → Design Mass Adjustment
Adams Car can automatically adjust the mass properties of an assembly or subsystem to match the mass properties you input. Learn about Assemblies and Subsystems.
To adjust the aggregate mass, you enter the mass, Centroidal Inertias, and the center-of-mass location relative to a marker. Learn about Markers.
You also select a part that Adams Car modifies to match the desired mass properties.
 
For the option:
Do the following:
Assembly
Select an assembly whose mass you want to modify. The menu lists all open assemblies.
Subsystem
Select a subsystem whose mass you want to modify. The menu lists all open subsystems.
Relative to Marker
Specify a marker that defines the reference location of the new CG of the assembly. This marker is only used for the CG Location, not the inertias.
CG Location
Enter three coordinates that define the position of the new center of gravity (CG) of the assembly with respect to the marker you specify in the Relative to Marker text box.
Modify Part
Specify a part whose mass and inertia properties Adams Car will update to achieve the desired total mass and inertia properties. We recommend that you set this text box to chassis or body of the vehicle so Adams Car can reduce the mass or inertia, if desired.
To avoid nonphysical conditions, Adams Car makes a series of Error Checks.
Mass
Enter the aggregate mass.
Ixx, Iyy, Izz
Enter real values that define the inertia properties of the model. You must express these values as centroidal inertias.
Off-Diagonal Terms
Select to display the cross-term inertias (Ixy, Iyz, and Izx).
Clear its selection to display only principal-terms. If cross-terms are not displayed, their values will not be modified.
If you select Off-Diagonal Terms, Adams Car displays the following options:
Ixy, Iyz, Izx
Enter real values that define the cross-term inertias of your model.