differential equation - oscillation with changing mass
differential equation - oscillation with changing mass
(OP)
Hi, can anybody give me a hint on how I get Mathcad to solve an equation like m(y(t))*y''(t)=F(y). The problem is that m(y(t)) depends for a certain time on the value of the last amplitude and therefore mathcad has to remember this value within the solve block somehow. Thank you





RE: differential equation - oscillation with changing mass
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: differential equation - oscillation with changing mass
RE: differential equation - oscillation with changing mass
RE: differential equation - oscillation with changing mass
My approach with similar problems has been to write a time based simulation.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: differential equation - oscillation with changing mass
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I was experimenting with doing system identification to find the constants for ODEs. The first page is using a known ODE to generate data that must be identified using the the technique used on the second page.
Staphen will need to have four equations. instead of two.
One that computes m', y, y' and y"