Period doubling route to chaos for a BVP oscillator with periodic external force

The effect of a periodic input current, f cos ωt, in the Bonhoeffer-van der Pol oscillator is investigated. As the parameter f is varied, with other parameters at constant values, the typical period doubling bifurcation sequence is found to occur, leading to chaotic motion, in agreement with the Feigenbaum scenario. Numerical values for the fractal dimension of the strange attractor of the BVP oscillator are also presented for a certain range of parametric values.