Could someone please check my Simulink Diagram

AI Thread Summary
The discussion focuses on creating a Simulink model for a car suspension system with specified parameters. The user seeks assistance in verifying their model, particularly for an impulse input, which they initially misrepresented as a constant input. Contributors suggest using two step response blocks with a slight delay to achieve the desired impulse response. The user confirms they have successfully modeled the step and ramp inputs and appreciates the guidance provided. Overall, the thread emphasizes the importance of correctly implementing input types in Simulink for accurate system modeling.
AnkleBreaker
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Homework Statement


question.png

I was asked to draw a Simulink Model for the above (car suspension) system.
m = 250kg
k, spring constant = 70000N/m
c, damping coefficient = 3000N/m/s

Homework Equations


If any equations are needed please let me know

The Attempt at a Solution


simulinkimpulse.jpg

The question says to draw 3 Simulink Models having separate types of input (step, ramp, impulse)
The diagram above shows the Simulink Model for the Impulse Input

It would be appreciated if someone could check my Model and tell me of any short comings. Thank you.
 
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a constant input of 1 is not an impulse. there is a step and ramp input you can use. To create the impulse response you need to get creative. As a hint, try using 2 step response blocks, and slightly delaying one of them

its been a while since I have worked with mechanical systems like that. on account of me being lazy, if you give me the equations, I can check your simulink diagram assuming the equations are correct.
 
donpacino said:
a constant input of 1 is not an impulse. there is a step and ramp input you can use. To create the impulse response you need to get creative. As a hint, try using 2 step response blocks, and slightly delaying one of them

its been a while since I have worked with mechanical systems like that. on account of me being lazy, if you give me the equations, I can check your simulink diagram assuming the equations are correct.
Many thanks for you reply.

Yeah I got the step and ramp, I was having a little bit of trouble with the impulse, but I will try to do what you told. Thanks for the hint.

The differential equation I got, and the simulink diagram was modeled according to:
y''(t) = (1/m)(x - ky - cy')
Capture1.jpg


The simulink model is exactly the same except ramp and step inputs instead of the constant input in the original post

Thank you very much for your help
 
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