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What is wrong with my Simulink model for random road profile?

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Pankaj Sharma
Pankaj Sharma 2021-7-19
I am trying to generate Random Road Profile Garde-C as per ISO-2631 using shaping filter equation:
d/dt (Z_R (t))= -∝VZ_R (t)+ w(t)
where w(t) is a white noise process with the spectral density 2αVσ^2 .
here,
V= vehicle speed
α = 0.127
σ = standard deviation
The Table and Simulink Model used for Generating Road profile is shown below in the figure.
What value I have to use in random Number Block to produce White Noise? For Garde-C profile input parameter for Random Number block are taken as "Mean =0" , "Variance = 0.000064" and "Seed =0" . But the profile is not coming as expected.
Am I selecting the right parameters for Random Number Block?

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