Co-Simulation Issue

[josh m]

hi

I have been trying to run a co-simulation that consists of a hydraulic suspension being implemented on an Adams/car convertible model that has been tuned …

I have tried to make the Longitudinal Velocity of the vehicle Constant so I can have a steady-state test condition and I succeeded to do that in Adams/car by the use of the PID controller in Event Builder .

but when I run a co-simulation in Simulink/MATLAB the longitudinal velocity acts like this :

however it works like this in Adams/car itself :

what do you think i'm doing wrong ? or is it not possible to create a constant longitudinal velocity when i transfer it to MATLAB ?

mind you , the other results are almost right and identical … like roll angle and roll rate ...

thanks

 

[josh m]

anyone ?

 

[SomptingGuy]

All else being the same, check units and sign conventions. Plot the error signal if you can access it. Will be simple inside Simulink, hopefully not too difficult in ADAMS.

Steve

 

[josh m]

thanks Steve

i guess i have to dig deep for this ...