ADAMS/Car rear suspension simulation help

[Alexander Martin]

Hello,

I am in the process of trying to run suspension tests for our next car using MSC Adams/Car. I sucessfully simulated our front suspension design, but I am encountering trouble when simulating the rear suspension (trailing-arm). Adams wants me to specify a steering axis and an upright communicator, but the trailing arm design has none of those. When I attempt to simulate my rear wheel assembly (set to minor role "rear"), it throws out a bunch of singular matrix errors. Can someone with experience using MSC Adams help me configure my parameters and template properly?

Thanks,
Alexander Martin,
NUsolar Associate PM and Mechanical Team