Road Roughness in simulink

Hi everyone;

I designed a quarter car model with one degree of freedom in Simulink and collected the acceleration values on the roads with it. However, when analyzing my model in simulink, I found that my results were very meaningless. The double integral of the acceleration data will give the displacement in the z axis. but this x graph (displacement) shows a continuous increase..?

Answer 1

[Fangjun Jiang]

It seems normal to me. The acceleration has positives and nagatives, thus the speed shows rising and falling, but because all the speed values are positive, the displacement will show a continuous increase.

[Mehmet Rizelioglu]

thanks for your interest