Matlab simulink model of a Quarter-Car model

[@skidzeess608]

Thank u sir, had a university class yesterday and hand to remind to myself what was the "logic" in this connections.

[@abnereliberganzahernandez6337]

control theory summarized in one simple block diagram simply wow wow wow

[@ashishpawar7707]

Quite lucidly explained...

[@zmasoud]

Thanks.

[@mtopangaprimo2556]

Thank you.

[@ahmeddesoky3599]

Thank you Prof. for the clear well explained topic. What if I want to to compare between different responses on the same plot by giving different values for c . Can I do that in Simulink ? how please !

[@zmasoud]

Duplicate the system and send both outputs to the same scope. If you are using an older version of simulink you will need to use a multiplexer block [Mux] to merge the two output signals.

[@jdjbcnk]

Thank you sir. And can I define it 2-dof system?

[@zmasoud]

Yes, you can.

[@Abhijeet10A]

I have a question, what if same system , but we have to simulate with a step input? Is it still right to use a derivative block if we use a step input? Since the derivative of numerical constant value is 0. How would that work or how can I model with step input? Any help is widely appreciated.

[@jasonbledsoe9196]

I just recreated this and used a step-input and it seemed to work fine and the model didn't fail. Just check your parameters and use reasonable numbers.

[@Abhijeet10A]

@@jasonbledsoe9196 Thanks

[@zmasoud]

The derivative of a step input is an impulse. The derivative block in Simulink outputs an impulse with an amplitude that depends on the time step used in the model solver. The math holds well.

[@riccardoattilia8219]

The derivative of a step it is called delta function, or inpulse. IT works

[@omarhishamzamzam]

Thank you sir

[@lordakira1825]

que ecuacion usaste para el modelado?

[@zmasoud]

It’s under the model figure.

[@vamsialuru7845]

No where you have mentioned initial conditions while integrating. what are initial conditions for this problem

[@backbench3rs659]

What about when there will two mass.... Means two equations then how we deal it....?

[@zmasoud]

Yes, you will have two equations of motion. See my "Matlab Simulink model of a Drum-Mass system" video.

[@backbench3rs659]

@@zmasoud thankyou its very helpful

[@ileyka]

Thanks for the explanation! Why is there no m*(d2y/dx2) in the equation, where m is the mass of the spring and the shock absorber?

[@gordonmax711]

Refer to second order differential equation.

[@Kancheeban]

do you have for half car?

[@zmasoud]

Soon.

[@Kancheeban]

@@zmasoud I need it for my dissertation

[@mytube1000javed]

Good explanation. How can I simulate half car model?