MATLAB Central Newsreader - Simulink Model

Simulink Model

faisal saeed — Sat, 18 Aug 2007 18:08:20 -0400

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.

Re: Simulink Model

Mike — Tue, 05 Aug 2008 12:18:02 -0400

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.

Re: Simulink Model

Steve Amphlett — Tue, 05 Aug 2008 12:55:03 -0400

"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.