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Hello,
I'm trying to create a model of pendulum motion in Matlab to fit the curve we measured in class, and it has some nonlinear components (friction). It looks like the best fit is a sinusoid with an envelope given by a parabola (see attached file).
The equations of motion are given by:
[itex]\ddot{\phi}(t) = k_2\dot{\phi}(t)k_3\sin(\phi(t))[/itex]
How this equation can be changed so that the solution of it is a searched sinusoid?
Thank you.
// edit: please move this to Differential Equations
I'm trying to create a model of pendulum motion in Matlab to fit the curve we measured in class, and it has some nonlinear components (friction). It looks like the best fit is a sinusoid with an envelope given by a parabola (see attached file).
The equations of motion are given by:
[itex]\ddot{\phi}(t) = k_2\dot{\phi}(t)k_3\sin(\phi(t))[/itex]
How this equation can be changed so that the solution of it is a searched sinusoid?
Thank you.
// edit: please move this to Differential Equations
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