I've been watching all the MATLAB tutorials on physical modeling for the past few days and have been simultaneously trying modeling a powertrain system for a BAJA vehicle. Even after reading the documentation and watching the videos again and again, there are few problems that I haven't been able to solve. Please help me out.
The issues I've faced are as follows :
(1) Whenever I use a variable transmission, if I measure the engine RPM it's oscillating in nature. This could be because of those "damping" and "stiffness" variables in that unit, but I haven't been able to find some explanation for these variables as in what they represent.
(2) I've input my engine torque vector as [2000 2200 2400 2600 2800 3000 3200 3400 3600]. I gave an initial RPM of 2100. The solver warns me that after 7.83 s the engine rotational speed exceeds the maximum speed, trying to fix which I set the redline as 3600 RPM. But even then I am facing the same issue.
(3) When I use an RPM sensor connected in series/parallel to the engine I get a starting from 200 RPM, but shouldn't it be 2100 RPM ?
Please help me out.
I have attached the model below.