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Topic: transfer function
Replies: 2   Last Post: Dec 5, 2012 9:04 AM

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 Shri Posts: 4 Registered: 12/4/12
Re: transfer function
Posted: Dec 5, 2012 9:04 AM

On Wednesday, December 5, 2012 1:41:19 PM UTC, Nasser M. Abbasi wrote:
> On 12/5/2012 7:17 AM, shri preethi wrote:
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>
>

> > can some one help me out to find the transfer function fore a pneumatic pump
>
> >and the matlab progr

>
>
> You find the TF for any system the same way. You start with
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> the mathematica model. i.e. you derive the equation of motion.
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> (or the relation between the input/output in time domain)
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> This is step (1)
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>
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> You'll end up with a differential equation. For SISO, you'll
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> have something like ay''+by'+cy=f(y,t). For MIMO you'll need
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> to use state space (ss functions, i.e. A,B,C,D), much easier.
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>
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> Then you translate this to Laplace domain, then you find
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> the ratio of the Laplace Y(s) of the output (y(t) in the above) to
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> the Laplace F(s) of the input (f(y,t) in this case).
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>
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> This ratio is the transfer function, will be a function of 's',
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> the Laplace domain variable. It should have a numerator polynomial
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> in 's' of order <= that in the denominator polynomial, else you
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> did something wrong in the model.
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>
>
> So, did you step (1) above? if so, what is the equation?
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>
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> or you want one to also derive the equation for the pump as well?
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>
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> If so, what is the specifications? (sizes, pressure, input, etc...?)
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>
>
> I do not do mechanical pumps myself, at school mostly we do basic
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>
> the model itself but may be someone else would, but you have to give
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> specifications. Engineers like to see specifications before doing
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> design.
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> www.engineersedge.com/hydraulic/hydraulic_pneumatic_cylinder_force_10105.htm

the specificetion r thr in this link...using tis i need to find the transfer function....can u plz help it out...

Date Subject Author
12/5/12 Shri
12/5/12 Nasser Abbasi
12/5/12 Shri