In contrast to other transient events, the On Center Handling is performed through user written control subroutine. The event is performed in 3 transient run stages. The first stage of the simulation is performed for 5 seconds with a user specified steering wheel input. The seond stage is performed upto 10 seconds with a different steering wheel input specified by the user. Based on these two simulations, the necessary steering wheel angle required to produce the user specified lateral acceleration in determined and the simulation is performed for 12.5 seconds.
The CONSUB for oncenter handling is invoked by typing the following at the command prompt or appending it to the acf file.
CONTROL/FUN = USER(1144, lat_acc, aryid, varid1, varid2)
where:
lat_acc |
|
aryid |
|
varid1 |
|
varid2 |
Array statement required in the dataset for oncenter analysis
ARRAY/aryid, NUM = num1, num2, num3
where: