Physics Programs » SIMON/DyMESH

ID #1066

Does it matter which brake table input option I use (i.e. Pedal Force, Wheel Force, or Available Friction) in SIMON?

Yes it does. EDC recommends the use of the "Pedal Force" option and discourages use of the “Wheel Force” and “% Available Friction” options (see SIMON User Manual, page 4-25). The reason for this is that SIMON has a very sophisticated braking system that is completely by-passed if you use the "Wheel Force" and "% Available Friction" options. Among other things, if you use any input option other then 'Pedal Force,' proportioning has no effect and ABS is not possible.

A few additional things to keep in mind:

1. Some users have a feel for the "% Available Friction" option because of their prior use of EDSMAC or EDSMAC4. A great way to get a feeling of how much pedal force is required to slow a vehicle is to set up an event with an initial vehicle speed of, say, 75 mph. Enter a Pedal Force brake table with zero pedal force at t = 0, and 100 lb pedal force at t = 5 seconds. Execute. Then create a table in Variable Output with pedal force in column 1 and total acceleration in column 2. Voila! (Print a copy of this table for your file for future reference.)

2. Using the Pedal Force option, you can disable the brake at one or more individual wheels via the Set-upWheels pull-down menu option, then select the Brake tab.

3. Using the Pedal Force option, you can lock one or more wheels (as from collision damage) using the Set-up, Wheels pull-down menu option, then select the Damage tab.

 

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Last update: 2011-09-14 01:11
Author: EDC
Revision: 1.0

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