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ADAMS/Car: Straight Line Acceleration Event with Initial Velocity = 0 and Throttle Demand Start at 1s

jsph_inc
Hi All,
 
I'm trying to do something that seems like it should be straightforward but am running into problems.
 
From the article below I'm trying to modify the file "test_accel.xml" to have a zero initial velocity and to start the throttle demand at one second.
 
 
The resulting throttle demand is correct however the drive torque output is not correct with a large initial torque and a subsequent profile which is incorrect.
 
I tried reducing the pvs_engine_stall_speed=0...but that didn't help.
 
Does anyone know what changes would be needed to run this file with a zero initial speed and the throttle demand starting at 1s? I'm guessing the engine and clutch settings are the culprit...
 
joe.
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  • 0
    HI Alexis,
     
    Thanks for the response. I had thought that when you set the initial velocity to zero and delay the throttle to start at 1s that the vehicle would be at rest until the throttle starts.
     
    Doesn't look like this is possible due to the engine idle speed. Can at least have the clutch engaged at t=0s.
     
    Would be nice to have a feature in A/CAR to have the vehicle start at zero speed until the throttle is engaged.
     
    joe
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  • 0
    HI Alexis,
     
    Thanks for the response. I had thought that when you set the initial velocity to zero and delay the throttle to start at 1s that the vehicle would be at rest until the throttle starts.
     
    Doesn't look like this is possible due to the engine idle speed. Can at least have the clutch engaged at t=0s.
     
    Would be nice to have a feature in A/CAR to have the vehicle start at zero speed until the throttle is engaged.
     
    joe
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