From: Jun on
Hi!

I am currently working on double pendulum problem by using simmechanics.
It was ok to make double pendulum with relative coordinate because there are lots of good examples.
However, I couldn't make double pendulum with absolute coordinate.

I checked Seth' Blog (Thanks Seth!!)

http://blogs.mathworks.com/seth/2009/02/26/modeling-mechanical-systems-the-double-pendulum/

He actually used absolute coordinate to derive E.O.M for double pendulum.


Also I checked this

http://www.mathworks.com/matlabcentral/fileexchange/23126-double-pendulum

This is good example but plotting for theta 2 is not started from 0. (according to Seth's E.O.M. theta 2 should start from 0.)

How can I implement this model with absolute coordinate by using Simmechanics??
Thanks in advance.

Jun