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Fit Data

Fit Data

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Fit Data

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This section describes the data required for the fitting process of your bushing project.

•Select the Fit Data tab.

If your project uses a rubber bushing, then the following page appears:

fit_data_fix

 

If your project uses a hydromount bushing, then the following page appears:

fit_data_hydromount

 

The fields on the Fit Data tab include the following:

Fields

Description

Initial GBS File

The fitting algorithm requires an initial set of model parameters to initiate the fitting. These parameters are contained in the Initial .gbs file. The software searches for a .gbs file with the same prefix as the Application_Type field specified in the .spd file. The default model that is used is based on the Application_Type in the .spd file.  If the software does not find the Initial .gbs file, it uses a default Initial .gbs file from the installation. The set of values in the default Initial .gbs file generally works for most fitting tasks; however, you have the option to provide your own Initial .gbs file.

OPT File

To control the fitting, the fitting algorithm requires upper- and lower-bound values for the model parameters. These values are located in the .opt File. The software searches for an .opt file with the same prefix as the Application_Type field specified in the .spd file. If the software does not find an .opt file, it uses a default .opt file from the installation. The set of optimization parameters in the default .opt file generally works for most fitting tasks, however, you have the option to provide your own .opt file.

View design parameters

Select to view the model parameters and optimization settings as you see in the following image. You can modify the parameters as required. Modified values are sent to the fit tool.

fit_data_13_hot_fix

 

Additional options on the Fit Data tab include the following:

Options

Description

Direction sub tabs:
FX, FY, FZ, TX, TY, TZ

You can select any active direction. A direction is active if the .spd file contains data for this direction. The information in the Direction sub tabs comes from the .gbs and .opt files that were loaded. You can view and modify the optimization parameters in these tabs.

Bushing model

These are radio buttons that you use to specify the bushing model for fitting. If the selected .gbs and .opt files include the values for this model, the values are loaded in the table. If the values are not loaded, you have to enter them. Note that the software automatically selects the correct bushing model for you so that you do not need to toggle between the models.

Parameter table

Displays the initial model parameter values from the Initial .gbs file, and the upper and lower bounds for each of the parameters as specified in the .opt file. You can change these values if necessary.

# Processes

Defines the number of sub-processes for the fit operation. If you enter 1 for this option, MIT runs using a single process. For any value greater than 1, MIT uses multiple sub-processes. The MIT automatically configures the number of sub-processes to use.

Reset

Restores parameters in the .gbs and .opt files as they were read in from the Initial .gbs and .opt files. All edited values are discarded.

Fit <direction>

Runs the Fit for a selected direction. Each Fit is considered as a cycle in the Review tab. You can submit jobs while a Fit job is running.

Fit All

Runs the Fit for all available directions. Each Fit All is considered as a cycle in the Review tab. You can submit jobs while a Fit/Analyze job is running.

View Jobs

Displays the progress of your jobs:

view_jobs2