Path: news.mathworks.com!not-for-mail
From: "Mike " <mike.priestly@westnet.com.au>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Simulink Model
Date: Tue, 5 Aug 2008 12:18:02 +0000 (UTC)
Organization: The MathWorks, Inc.
Lines: 38
Message-ID: <g79gdq$l5e$1@fred.mathworks.com>
References: <fa7cik$8sd$1@fred.mathworks.com>
Reply-To: "Mike " <mike.priestly@westnet.com.au>
NNTP-Posting-Host: webapp-03-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1217938682 21678 172.30.248.38 (5 Aug 2008 12:18:02 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Tue, 5 Aug 2008 12:18:02 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 1079448
Xref: news.mathworks.com comp.soft-sys.matlab:483705



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.