Robust chaos in systems of circular geometry

We propose two models of systems that manifest robust chaotic regimes associated with uniformly hyperbolic attractors. The model schemes are rings of oscillators and nonlinear elements arranged in such way that signals undergo special transformation during full rotation along the rings. The models are governed by systems of ordinary differential equations. These equations were studied numerically. We discuss the results of numerical simulation that confirm our suggestion of robust hyperbolic chaos in proposed models.