Control System Engineering - Block diagram reduction Exam problem

[AnzMark]

I am having a problem with calculating transfer function given with a picture below i need to calculate output Y(p) / input V(p) grafically and analitically but i dont know where to even start, please help me
Thanks for any help or comment

 

[GregLocock]

Why weren't you paying attention in lectures?

It's just algebra

Using lowercase to represent the output of each stage
o=Ov
b=Bo
r=Ro=ROv
f=F(p+r)
m=M(b-a)
etc

finally after substituting and eliminating you'll be able to write n/v, which is Y/V, which is what you want, in terms of the block names.

You are missing a sign on the rhs of the page and at least 2 arrowheads.



Cheers

Greg Locock


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[AnzMark]

Thank you very much, i was paying attention, but professor did it differently (analitically)

 

[AnzMark]

Can you please tell me the solution i dont know how to use Algebra Methods.
Thanks for answer.

 

[AnzMark]

I dont know where i can learn to solve block diagram analitically.

 

[IRstuff]

Can you please tell me the solution i dont know how to use Algebra Methods.

Seriously? How did you even get into college, then? Given that this looks like 2nd year EE course material, you did ZERO math in 1st year?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[AnzMark]

We didnt have algebra methods in our program maths. Nobody in our class knows (students) the solution.

 

[IRstuff]

??? You've had ZERO algebra? What engineering school allows zero math experience? You've NEVER solved simultaneous equations, EVER?

TTFN (ta ta for now)
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[AnzMark]

I know h9w to solve this program grafically, but i dont know how to solve it analitically. Here is the example of analitical steps

 

[IRstuff]

The steps seem pretty clear, so you should be able to extrapolate from that example to the current problem, so what's the issue?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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[AnzMark]

I have solved this problem, but i dont know if it is correct, can you please tell me if i am right. Thanks for support

 

[AnzMark]

But i need to write Y(output)/V(input) function, these equasions are very confusing.
Y= fN = (F(p+r))N = F(P(z+m+f)+ROv)
p=P(z+m+f)
r = Ro=ROv
b = Bo=BOv
o = Ov
f = F(p+r)
m = M(b-a)
a = A ???
z = Z ???

Can you please show me the solution for a and z, thank you, this methodical way is quite hard.
Thanks for support

 

[GregLocock]

You've been shown two approaches by your prof, use them. The method I described is how I'd do it starting from zero, but it is not elegant.

Cheers

Greg Locock


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