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i made a quarter car suspension using simulink . but the output is always 0. why? i need help!

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i made a motion to formulate the simulink . but the output is always 0.

Accepted Answer

Sebastian Castro
Sebastian Castro on 5 Nov 2018
You either need a forcing function or some nonzero initial conditions in the Integrator blocks... otherwise, you should expect to get all zeros if your system starts in equilibrium without any disturbance.
The forcing functions would feed right into the (1/Mass) gains, in the Add blocks at the top left and/or bottom right or your model, depending on whether the force acts on the chassis or the wheel.
- Sebastian

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