1. Workshop 3 Adams/Driveline Specific Test Analyses

2. This Workshop This workshop
Open assembly “JEEP_RWD.asy” from adriveline_shared database and perform:
Tip-in Tip-out analysis
Open assembly “front_driveline_RollerRig.asy” from adriveline_shared database and perform:
RPM Sweep analysis
Step Torque analysis (optional)
Post-processing and investigating results in Adams/Post-Processor

3. Tip- in tip-out analysis
Open assembly “JEEP_RWD.asy” from adriveline_shared database
Menu Navigation Shorthand
“From the main menu bar : Simulate >> Full-Vehicle Analysis >> Driveline Tests >> Tip-in Tip-out …
Populate the dialog box as shown to the right and then hit OK to simulate

4. View the Results View the results Press F8 to switch to PostProcessor
Plot the Curves matching the output of interest (see below)
Use the Control key to select multiple items
Check the Surf Box
In a Tip-in Tip-out simulation you are usually interested in analyzing:
Longitudinal Acceleration of the vehicle
Throttle_demand
Driveshaft windup angle
Engine suspension loads
Engine displacement/rotation
Etc...

5. RPM Sweep Analysis Rpm sweep analysis
Open assembly “front_driveline_RollerRig.asy” from adriveline_shared database
Menu Navigation Shorthand
“From the main menu bar, follow the path from Simulate, navigate to Full-Vehicle Analysis, on to Driveline Tests, click RPM Sweep...”
Abbreviated as: Simulate >> Full-Vehicle Analysis >> Driveline Tests >> RPM Sweep…
Populate the dialog box as shown below and then hit OK to simulate
Assembly: front_driveline_RollerRig
Output Prefix: test
End Time: 10
Number Of Steps: 1000
Mode of Simulation: interactive
Gear Position: 3
RPM Start: 1500
RPM End: 4500
Engine Dyno: engine.ues_engine_torque

6. RPM Sweep Analysis Rpm sweep analysis
Perform another analysis with some changes
Here we perform another of the same analysis but with Gear value set to 4 to see what effect does it have on the vehicle simulation keeping other input variables just the same.
Populate the dialog box as shown below and then hit OK to simulate
Assembly: front_driveline_RollerRig
Output Prefix: test
End Time: 10
Number Of Steps: 1000
Mode of Simulation: interactive
Gear Position: 4
RPM Start: 1500
RPM End: 4500
Engine Dyno: engine.ues_engine_torque

7. View the Results View the results Press F8 to switch to Post-Processor
Plot the Curves as Shown:
Use the Control key to select multiple items
Check the Surf Box
Plot:
gearbox.gearbox_RPM.inputshaft_rpm_front
gearbox.gearbox_RPM.outputshaft_rpm_front
crankshaft.engine_RPM.rpm_front

8. Optional - Step torque analysis
Open assembly “front_driveline_RollerRig.asy” from adriveline_shared database
Select Simulate >> Full-Vehicle Analysis >> Driveline Tests >> Step Torque…
Assembly: front_driveline_RollerRig
Output Prefix: test
End Time: 10
Number Of Steps: 1000
Mode of Simulation: interactive
Initial Velocity: 60 km_hr
Gear Position: 4
Initial Torque Value: 25000
Final Torque Value: 50000
Step Start Time: 1
Duration of Step: 1
Engine Dyno: engine.ues_engine_torque

9. Step Torque Analysis Step torque analysis
Perform another analysis with some changes
Here we perform another of the same analysis but with Gear value set to 5 to see what effect does it have on the vehicle simulation keeping other input variables just the same.
Populate the dialog box as shown below and then hit OK to simulate
Assembly: front_driveline_RollerRig
Output Prefix: test_1
End Time: 10
Number Of Steps: 1000
Mode of Simulation: interactive
Initial Velocity: 60 km/hr
Gear Position: 5
Initial Torque Value: 25000
Final Torque Value: 50000
Step Start Time: 1
Duration of Step: 1
Engine Dyno: engine.ues_engine_torque

10. Step Torque Analysis Step torque analysis
Hit F8 to go to post-processor
Plotting page opens by default
Plot ‘gearbox_longitudinal.gearbox_RPM.outputshaft_rpm_front’ and ‘engine.engine_RPM.rpm_front’ on different pages or on the same page in different plots.
Investigate the differences in results between the two simulations and note how changing the gear value for the same step-up of torque causes the results to vary.