Figure 7.

Adaptation quality measures for the Hopf oscillator with AFDC mechanism in the f₀-f_ext-frequency space for different parameter values. For each of the given parameter tuples (η, κ, τ), from left to right, the relative convergence time $\tilde{\Delta }$, the relative final frequency offset $\tilde{\delta }$, the final relative frequency fluctuation $\tilde{\sigma }$, and the combined quality measure Q for the given parameter values of η, κ, and τ are shown in the plane spanned by the initial intrinsic frequency f₀ and the frequency of the external unit sine-wave signal f_ext.