Simulink Problem in differential equation 1

[elenms]

I want to apply this equation on simulink.
alpha = omega * setta (as setta changes from 0 to 90 degree)

where:
setta :- angle.
omega :- angular velocity.
alpha :- angular acceleration.

I tried to make it So i made the following diagram
But I cannot insert values for setta!! So how to enter setta as changes from 0 to 90

 

[xnuke]

Your equation is fundamentally incorrect. The units on both sides are not equal. Fix your equation, then try to create a Simulink model. If you have trouble, ask about the new model.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[elenms]

I am sorry the right equation is
alpha = omwga^2 / setta
The block diagram

 

[elenms]

but how to get values of omega and alpha when setta changes form 0 to 90

 

[elenms]

image in better resolution

 

[elenms]

?!!

 

[IRstuff]

?? you show setta as the integral of omega, so there is not "setting" of setta. You've created a complete, self-contained, closed loop, You could possibly add a multiplier or sum box to inject a signal, but it wouldn't be setta, per se.

TTFN
faq731-376

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[elenms]

thnx you right i just did the initial conditions of setta and omega and it works