I am new to Simulink and am trying to make a simulation of an active vehicle suspension with Simscape. For some reason, I am getting unreasonable results in my sim, despite following the examples on the mathworks website pretty closely. I have temporarily disabled the acceleration command for testing.
The input from the signal builder is a sinusoidal function. I don't understand why the values of the suspension motion for the top mass are higher than the input.
Not sure if this is the only issue, but I'd strongly recommend not using that Derivative block. The derivative you get there is a numerical approximation that is highly depending on the time step the solver takes. It can cause instability.
If you want the acceleration as a direct measurement, I would instead recommend grabbing an Ideal Force Sensor block, connecting it in series with the Mass block, and then dividing by the mass to get acceleration.
