ENGINEERING TEST TOOLS

VeDyan™

Vehicle Dynamics Analysis
The vehicle dynamics analysis toolkit, VeDyan™ provides rapid analysis and report generation from vehicle dynamics test data. This toolkit was initially designed to aid Roush vehicle dynamics testing services. It was developed and validated using the real world experience of the Roush Vehicle Dynamics Team. The VeDyan™ vehicle dynamics analysis toolkit performs as an integral part of the DRIVE™ system. This toolkit provides analysis for the standard and specialized vehicle dynamics test procedures. VeDyan™ will continue growing in capabilities in response to the needs of the Vehicle Dynamics test community.

Version 2.1.0 Includes:

  • Test Conditions Input: Various test parameters may be entered to influence the vehicle dynamics. Rear Weight, Front Weight, Wheelbase, Steering Ratio, etc. may be input. Test Limits may also be set to eliminate values that are out of the usable range.

 

 

 

 

 

 

  • Constant Radius Test: The Constant Radius test consists of a driver accelerating from 10 to 45 mph while trying to keep the vehicle on a constant radius around a circle. The report format for this test has not been written yet. It will follow the same format as the other tests.

 

 

  • On-Center Steering Test: The On-Center Steering test consists of a vehicle traveling at approximately 30-mph. The driver turns the steering wheel back and forth to + or -30
    degrees at a frequency of .2 hertz. The report for this test will include a graph of SWT* vs. Ay*, SWT* vs. SWA*, SWA* vs. Ay*, Yaw vs. SWA*, and driver performance. Each of the graphs will be on a separate page with relevant information on tables above them.
  • Frequency Response Test: The Frequency Response test consists of a vehicle traveling at approximately 47-mph. The driver turns the steering wheel back and forth to + or -30 degrees at varying frequencies. The report for this test will include graphs of the frequency response function of Ay* vs. SWA*, Yaw vs. SWA*, Roll vs. Ay*, and SWT* vs. SWA*. Each graph will include the magnitude, phase, and coherence of the frequency response functions. Each graph will be located on a separate page with a table showing relevant information including –3db cutoff frequency and 90 phase lag time. *SWT = Steering Wheel Torque *SWA = Steering Wheel Angle *Ay = Acceleration along the “Y” Direction (Lateral Acceleration)
  • Lane Change Test: The Lane Change test consists of a driver turning the steering wheel 40 degrees to the left and then 30 degrees to the right while travelling at approximately 60-mph. The report for this test will include 3 graphs. One graph will have all of relevant channels plotted against time. The second graph will be the front and rear calculated roll plotted against time. The third graph will have the Ay* and SWA* plotted against time.

 

  • Parking Effort Test: The Parking Effort test consists of a vehicle traveling at approximately 5-mph. The driver turns the steering wheel back and forth 500 degrees, 4 times. The report for this test has a separate graph for each file. The graphs will have the SWT* and average SWT* plotted against the SWA*. There is also a graph of the average of the files selected for the test.

 

  • Power Steering Efficiency: Power Steering Efficiency can be used for any test. This procedure calculates the efficiency of the power steering system based on the power going in compared to the power going out. The report for this procedure contains 14 graphs that show the raw and calculated channels used in determining the efficiency.

 

  • Straight Line Acceleration/Deceleration: The Straight Line Acceleration/Deceleration test consists of a driver accelerating from 0 mph to a desired speed or decelerating from a desired speed to 0 mph. The report for this test will consist of 2 graphs comparing the vehicles vertical movement to its longitudinal acceleration. *SWT = Steering Wheel Torque *SWA = Steering Wheel Angle *Ay = Acceleration along the “Y” Direction (Lateral Acceleration).

 

  • Swept Steer: The Swept Steer test consists of a vehicle traveling at 60 mph with a driver turning it’s steering wheel to the right and left trying to create a lateral acceleration. Depending on whether it is a low G or high G test will determine what lateral acceleration the driver is trying to each. The report for this test will consist of 2 graph per file, plotting the SWT* and Ay* vs. SWA* and SWT* and SWA* vs. Ay*. Each graph will also include a table showing the relevant information.
  • Step Steer: The Step Steer test starts with a vehicle traveling at a constant speed. The driver then rapidly turns the steering wheel to a set angle. The driver holds that angle until it is steady state. This test is done repeatedly for different steering wheel angles. The report for this test will be of a similar format to the Frequency Response test report.
  • Straight Line Braking: The Straight Line Braking test consists of a driver decelerating from a desired speed to 0 mph. The report for this test will consist of 2 graphs comparing the vehicles vertical movement to its longitudinal acceleration. One can view Speed vs. Deceleration over time. *SWT = Steering Wheel Torque *SWA = Steering Wheel Angle *Ay = Acceleration along the “Y” Direction (Lateral Acceleration).

 

 

 

 

 

New Features:

  • Corrected Lateral Acceleration feature allows the acceleration values for any test file to be corrected to remove the influence from gravity. A new file is generated with corrected acceleration values.
  • Improved Graphing Features such as the ability to select between a common Y-Axis and individual Y-Axis in the General Viewer Mode.
  • Subtitle option added to the graph for a more detailed description of values displayed.
  • More intuitive icons and tool tips provide seamless navigation of program features.
  • Improved channel list box to easily distinguish between filtered and non-filtered channels.
  • Improved Speed Limit Management setup in Preferences.

 

 

 

 

 

 

 

 

 

 

 

Future Upgrade Plans Include:

  • General Viewer: The General Viewer is designed to create a report for any test that is notincluded in the VeDyan“ software. In the General Viewer the user can create up to 4 calculated channels. The user will also be able to create 4 different graphs for their report.
  • Interactive features with the DRIVE™ system
  • Brake pedal feel
  • Four-wheel drive specific maneuvers
  • Snow/ice maneuvers
  • Enhanced zeroing functions

 

 

 

*SWT = Steering Wheel Torque
*SWA = Steering Wheel Angle
*Ay = Acceleration along the “Y” Direction (Lateral Acceleration)

Brochures:
Product Brochure - 585 KB PDF

User Manual/Help File:
Help File

Software Downloads and Related Links:
Software Application Page

 

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