Motor not actuating the wheels

MBure
MBure Altair Community Member
edited October 11 in Community Q&A

Dear,

I loaded a basic full car model with two electric motors and 4WD and perform a constant radius event. The only modification I made was to the suspension points. However, when I try to run the simulation, it always fails. Fortunately, an animation file is generated, and when I view it, I notice that the car starts moving but then stops and begins rolling backwards, as if the motors are no longer actuating the wheels. This confuses me since the only modification I made was to the suspension points.

Additionally, I initially had a working model, but after making a few small adjustments, it stopped functioning. Even when I attempt to run the model that previously worked, it fails every time. I'm not sure where the problem lies.

Thank you in advance for your help.

Have a nice day.

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Answers

  • GTT Adam
    GTT Adam
    Altair Employee
    edited October 10

    Hi MBure,

    • Can you attach the animation file as a GIF so we can review the performance of the model? 
    • Can you share the model so we can review it as well?
    • Can you try to use the example Sedan_1 model, create a similar event, and then try again to see if it persists? 

     

    Hope this helps!

    Adam Reid

  • MBure
    MBure Altair Community Member
    edited October 10
    Adam Reid_21142 said:

    Hi MBure,

    • Can you attach the animation file as a GIF so we can review the performance of the model? 
    • Can you share the model so we can review it as well?
    • Can you try to use the example Sedan_1 model, create a similar event, and then try again to see if it persists? 

     

    Hope this helps!

    Adam Reid

    Hi Reid,

    Yes, sure! You can find the video attached.

    Regarding the model, would it be possible to share it privately with you? This is because it contains proprietary information about our suspension design.

    I already did try running the sedan model without modifying the suspension, and it worked without any issues.

    Thanks again for your help!

  • GTT Adam
    GTT Adam
    Altair Employee
    edited October 11
    MBure said:

    Hi Reid,

    Yes, sure! You can find the video attached.

    Regarding the model, would it be possible to share it privately with you? This is because it contains proprietary information about our suspension design.

    I already did try running the sedan model without modifying the suspension, and it worked without any issues.

    Thanks again for your help!

    Hi MBure,

    Of course you can share it with me! Please create a Support Case from the Community Home Page and just mention my name in the description. 

    Based on the video, I would review the Driver Throttle, Brake, Steering, and Gear demand signals to see what the Driver Model is telling the vehicle to do. If the Throttle Demand is 1, then the Driver is trying to accelerate but something is stopping it. So it would be worthwhile to see how the Driver Demand signal propagates through your powertrain model. If the Throttle Demand is 0, then the vehicle thinks it shouldn't accelerate, so you should look into how the attachments for the Altair Driver are defined.

     

    Hope this helps!

    Adam Reid

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