Duffing Measure Model is a free simulation that computes the solutions to the non-linear Duffing equation, which reads, x` + 2γx` - x (1 - x2) = f cos(ω t), where each prime denotes a time derivative.
Duffing Measure Model displays the evolution of a group of oscillators with similar initial parameters on a Poincare plot and the evolution of the oscillator with the central initial parameter displayed on a separate Poincare plot.
The evolution parameters can be changed via text boxes.