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From: "Steve Amphlett" <Firstname.Lastname@Where-I-Work.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Simulink Model
Date: Tue, 5 Aug 2008 12:55:03 +0000 (UTC)
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"Mike " <mike.priestly@westnet.com.au> wrote in message 
<g79gdq$l5e$1@fred.mathworks.com>...
> Faisal
> 
> Did you get any replies to your question?
> 
> I also have a similar problem.
> 
> Thanks
> 
> Mike
> 
> 
> 
> 
> 
> "faisal saeed" <faisal.saeed@mathworks.com> wrote in 
> message <fa7cik$8sd$1@fred.mathworks.com>...
> > hi,
> >  I am trying to solve a problem and want the advice in 
> > this regard.
> > A winch when generates a torque which ramps up from 
zero 
> > at the moment it is turned on to 500 Nm after 2 seconds 
> > which then remains constant.The winch drum is 1 m 
> diameter 
> > is connected to a load of 970 N via 30 m of synthetic 
> > rope, which can be assumed to be weightless.The 30 m 
> > lenght of rope has a stiffness of 50000N/m.
> > 
> > The model should stimulate the vertical motion of the 
> mass 
> > during the 4 seconds after the winch is turned on.you 
> may 
> > ignoe the change in the stiffnessof the rope caused by 
> its 
> > shortening as it is wound by the winch.You may aaume 
> that 
> > the rotary inertia of the winch motor, drum unit is 5 
> kgm2.

It's a bit of a cheat ignoring the variable stiffness of 
the rope though.

It's also a bit of a cheat begging here for homework 
answers.