For the option: | Do the following: |
|---|---|
File → Load File | Load a bushing input file (*.gbu or *.hbu). See About Bushing Property File. |
File → Save File | Save the bushing to a file. See an Example Output Bushing Property File. |
File → Export CMD (Batch run) | Exports a CMD file which can be used to run the optimization in batch mode by importing the CMD file into Adams Car (in interactive or batch mode). |
File → Quit | Quit IPIT tool. |
Help → About | About IPIT tool. |
Help → About Adams Car Ride IPIT | Help about Adams Car Ride IPIT. |
Input Parameters: | |
Calculate Frequency Response w Test Rig Simulation | Select to calculate the frequency response data with the current input parameters that are displayed in the text boxes. You can manually change those parameters and use this button to see the influence on the frequency response. The Dynamic Stiffness and Phase are calculated in time domain using component test rig simulations. |
Calculate Frequency Response in Frequency Domain | Select to calculate the frequency response data with the current input parameters that are displayed in the text boxes. The Dynamic Stiffness and Phase are calculated in frequency domain using a complex transfer function approach of the bushing. |
Error Control: | |
Enter the tolerance value for which the objective function is considered to be converged. | |
Max Function Evaluations | Enter the allowed maximum function evaluations/steps for the optimizer. |
Max Cycles | Enter the maximum cycles executed in each time simulation of the component test rig. The maximum cycles and frequency govern the simulation end time. |
Integrator Error | Enter the Adams Solver integration error used in the component test rig simulations. |
Objective Ratio Cdyn/ Phase | Specify the objective ratio between Loss Angle and Dynamic Stiffness. |
Error Weighting Method | The weighting factor used to calculate the objective error, see Error Control. |
Solver Control: | |
Include Mount Inertia | Sets the optimizer method for accounting for the inertia effects of the bushing mounts in the bushing test rig simulations (Optimization Type 3 for General Bushings) |
Mass of Bushing Mount | When the Mount Inertia is included, the mass of the mount can be specified here. This mount part matches with the ‘ges_i_part’ in the Adams Ride assembly mdids://aride_shared/assemblies.tbl/component_general_bushing_example.asy for the component testrig. When comparing the results in the IPIT with the component testrig, this mass should be identical. |
Keep Files | The Adams Solver related files for the bushing test rig simulation (Optimization Type 2 for Hydromounts and Optimization Type 3 for General Bushings) are not deleted when set to Yes. This can be useful in case the test rig simulations are slow or not responsive or need debugging. |
Sensor | Activates or deactivates the Energy Sensor. When the sensor is activated the frequency response is captured during the time simulations of the bushing model (Optimization Type 3) and the simulation is terminated as soon the model has a stable response. |
Method | Selects the method to calculate the frequency response (dynamic stiffness and loss angle) during the time domain Optimization Type (Optimization Type 2 for Hydromounts and Optimization Type 3 for General Bushings). |
Testrig Simulations | Chooses to run the Adams bushing test rig simulation (Optimization Type 2 for Hydromounts and Optimization Type 3 for General Bushings) in parallel or in sequential mode. This option can reduce the computational time significantly. |
Strategy Control: | |
Optimization Type | General Bushing (gbu): 3. TFSISO (freq. domain) The optimization tool will calculate the parameters of the transferfunction (TFSISO), for BUSHING_COUPLING = 3 only. 4. TFSISO & BW (freq. domain) The optimization tool will calculate the parameters of the transferfunction (TFSISO) and the Bouc-Wen function (BW) in frequency domain, for BUSHING_COUPLING = 3 only. 5. TFSISO & BW (time domain) The optimization tool will calculate the parameters of the transferfunction (TFSISO) and the Bouc-Wen function (BW) in time domain using bushing test rig simulations (time domain). Hydromount (hbu): 1. Hydromount (freq. domain) The optimization tool will calculate the parameters of the hydromount in (semi) frequency domain. 2. Hydromount (time domain) The optimization tool will calculate the parameters of the hydromount in time domain using bushing test rig simulations (time domain). |
Start Method TFSISO (GBU only) | ■MaxWell Elements A set of parallel Maxwell Elements will be used to approximate the TFSISO parameters, applied in Optimization Type 1, for BUSHING_COUPLING = 3 only. ■Frequency Bushing A frequency Bushing approximation will be used to approximate the TFSISO parameters, applied in Optimization Type 1, for BUSHING_COUPLING = 3 only. |
Loss Angle FB start (GBU only) | Specifies the loss angle for the Frequency Bushing start method (in degrees). |
Start Values BW (GBU only) | ■Estimate from Data Start values for the Bouc-Wen function for Optimization Type 2 will be estimated from the Bushing Data, for BUSHING_COUPLING = 3 only. ■Actual Values The Bouc-Wen values as specified in the GUI will be taken Optimization Type 2, for BUSHING_COUPLING = 3 only. |
Start Values (HBU only) | ■Estimate from Data Start values for the Hydromount will be estimated from the Bushing Data ■Actual Values The Hydromount values as specified in the GUI will be taken Optimization Type 1 |
Optimization Mode | ■Incremental The specified Optimization Type and its predecessors will be performed (in case of GBU for BUSHING_COUPLING = 3 only). ■Single Just the selected Optimization Type will be performed |
Start Optimization | Select to start the identification process. |
Abort Optimization | Select to stop the identification process. |
Plot | Displays the frequency response of the model; the dynamic stiffness in the plot named Cdyn and the loss angle in the plot named Phase. |
Data | Displays the input file and the frequency response data. |