ADM740_WorkshopsAppendix E

1、APPENDIX E Using the Tire Data Fitting Tool (TDFT)in Adams/Car,Using the TDFT Tool,In this workshop, you will learn how to use the Tire Data and Fitting Tool (TDFT) to calculate PAC2002 tire model parameters out of tire measurement data in Adams/Car. The workshop contains the following sections: Per

2、form PAC2002 tire parameter identification Plotting tire characteristics,Perform PAC2002 tire parameter identification,Perform PAC2002 tire parameter identification: Note: The use of Tire Data Fitting Tool (TDFT) to calculate and visualize PAC2002 tire model parameters out of tire measurement data o

3、r virtual data for steady state pure and combined slip conditions has been demonstrated using tire property file pac2002_205_55R16.tir). This tire property file does not have tire parameter identification or fitting data, so by default template file tdft_template.tir) will be loaded to define tire p

4、arameter identification data. An example measurement data file (Fm_data_example_tdft.txt) containing measurement data for both pure and combined slip conditions has been used from shared_acar_database.cdb database.,To start the Tire Data and Fitting Tool in Adams/Car:,To start the Tire Data Tool: Op

5、en MD Adams/Car Click on Standard Interface mode Select Simulate menu Select Component Analysis Tire Data Tool,Opening the tire property file,Opening the Tire property file and adding to the database: Select File menu Click on Open Tire property and Add to database Open the example tire property fil

6、e pac2002_205_55R16_tdft.tir located in/acar/shared_car_database.cdb/tires.tbl,Starting the Tire Fitting Tool,To start the Tire fitting tool: Verify that following parameters have been specified: Under Tab Dimension/Vertical: FNOMIN ($Nominal wheel) and UNLOADED RADIUS ($Free tire radius) Select the

7、 tire by clicking the column in Main GUI. Click on the Tire Fitting icon to start the Tire Fitting Tool. Message pops up indicating that no tire parameter identification data is present yet. Press OK.,Adding Measurements,Once the step 4 is completed. TDFT toolkit will launch another dialog box in or

8、der to enter the measurement data. Adding Measurement data: Click on Add Measurements by file or directory tab. Browse and select the fm_data_example_tdft.txt data from the shared_car_database/tires.tbl/(example measurement data file containing steady-state force and moment measurement data for pure

9、 and combined slip conditions). Set the characteristic under Fitting Parameters as All. Press Start to run the parameter identification.,Adding Measurements,After the completion of the fitting parameters calculation, Tire toolkit will show following message. Click OK.,1,2,3,4,5,Plotting the results,

10、To plot the results cancel the last tire fit window and return to the Tire Toolkit window. Plot the results as follows: Go to Plot Parameters Select embedded plot to display the plot within the tool or PPT. Set Measurement Data to Yes Set Slip Condition to Pure Select the Tire Plot tab to display th

11、e plot.,Plots ( Embedded and PPT),The measurement data ( added to the Tire Fitting Tool) is plotted againstPAC2002 model data. We have successfully verified the resultant tire model parameters by comparing the measurement (test) data to the PAC2002 model. Note: Measurement = No means that measurement