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  1. Mark23

    Yaw Rate

    Sorry I wasn’t so active lately. I was a couple of days ill so I lay all day in bed. What you said Greg, change all the parameters that I have already done. I noticed that the biggest influence on the yaw rate is the spring characteristic. I changed the characteristic of the dampers and the...
  2. Mark23

    Yaw Rate

    The validation of the model I want to do with an fysical test, but this cost a lot of money so this is postponed. I forgot to say, the vehicle has only one leaf spring so there cannot be friction between the leaves that causes the difference. The reaction rate of the compression of a lear...
  3. Mark23

    Yaw Rate

    By the way I simulated empty vehicle and a vehicle with maximum load.http://files.engineering.com/getfile.aspx?folder=606fc9a6-f9ae-4fbd-b274-a70af7cba85c&file=yaw_rate_beladen.jpg
  4. Mark23

    Yaw Rate

    Hi all, I have an question about the yaw rate of an vehicle. I have simulated the fmvss 126 test with an van with standard suspension and with air suspension on the rear axle. I want to explain the difference in the graphs but I cannot tell what this is. Can anyone tell me what is an big...
  5. Mark23

    Determing force on anti overrol construction

    Oke a mu of 1 is high, but that doesnt matter, because there goes a safety factor over of 3 or 4. What I thought by now, is that I maybe forgot the vehicle mass * 9.81 from the gravitation force in the center of gravity. I quote: I haven't seen an FBD, ah ok. Is this the force you where missing?
  6. Mark23

    Determing force on anti overrol construction

    Oke thanks, but why I don't need to worry if the sliding piece is a single piece? Because I don't understand why that is so and I want to understand. The friction coefficient is the next task. I think I must determine this experimental. I dont know if I need the static of kinematic friction. I...
  7. Mark23

    Determing force on anti overrol construction

    I must design the anti overrol frame that is placed on the vehicle during the test. I must know the reaction force on the globe wich you can see in the attachment of this message. That is what I want to know. Do i need the wheigt transfer of both axles for this calculation or am i going in the...
  8. Mark23

    Determing force on anti overrol construction

    What do you mean by Fz, is that the force on what I called B in my free body diagram in the attachment? That the friction force is depending from this force I know. Do you know how I deal with the fact that one axle lifts before the other? I am now doing an internship and I still niet to learn...
  9. Mark23

    Determing force on anti overrol construction

    Thanks for your reply, I am think i must calculate the force when the right wheel lifts of the ground. Thats why I didnt take the reaction force from this wheel in my calculation. But how I see it, the moment from the anti overrol construction must be the same as the overturning moment. Am i...
  10. Mark23

    Determing force on anti overrol construction

    Hi there, I am going to do the sine with dwell test on a vehicle. The vehicle can turn over on this test. For the safety of the driver, there must be an construction so that the vehicle can't turn over. The vehicle speed with this test is 80 km/h around 55 miles per hour. The steering movement...

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