help in using AUTO

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1 total messages Started by Cheng-Tang Lee Mon, 02 Nov 1992 18:42

#59

Author: Cheng-Tang Lee
Date: Mon, 02 Nov 1992 18:42

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Hi, I'm having trouble in solving the equation:

  x''(t) + sin(x(t)) = A sin( w t)

by the package, AUTO.  I don't have problem with the free response:

  x''(t) + sin(x(t)) = 0

and I use the following two equations for the forcing function, sin(w t):

  u1' = u1 + w u2 - u1 (u1^2+u2^2)
  u2' = -w u1 + u2 - u2 (u1^2+u2^2)

, thus u1 = sin(w t).

Everything works fine until I couple the free responce with the forcing  
function.  Can anyone help me with this?  Please send your reply to my  
e-mail address:  leecheng@liapunov.eecs.umich.edu.  Thanks.

James Lee

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