Special hybrid suspension in LOV ADAMS Car model

[grzyp413]

Hi everyone,


I'm working on mine master degree from automotive engineering. I'm trying to simulate a lightweight special-purpose vehicle model in Adams Car, featuring a hybrid suspension setup: a rocker-type dependent suspension and independent suspensions for each wheel.


The model builds without errors, and the static "Settle" simulation completes successfully after 2000 steps. However, the final position is clearly incorrect:

• The front tires do not make contact with the ground
• The rear suspension is heavily compressed
• The whole structure pitch and I am not able to find the reason why it happens

There is no drivetrain or powertrain included in the model. All joints and suspension geometries have been checked and seem correct.


Because the vehicle is incorrectly positioned after the static step, I’m unable to run any dynamic simulations — the solver fails due to lack of front tire contact.


Has anyone encountered similar issues with hybrid suspension systems or rocker-based axles? Could this be related to force transmission within the rocker mechanism, or an issue with tire-ground definition?


Any suggestions or diagnostic strategies would be greatly appreciated.
The time is running and I will be very thankful for some help.

Thanks in advance!

 

[GregLocock]

Where is your cg?