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- W2725365103 abstract "We study the solutions of a friction oscillator subject to stiction. The vector field of this discontinuous model does not follow the Filippov convention, and the concept of Filippov solution cannot be used. Furthermore, some Carathéodory solutions are unphysical. Therefore, we introduce the concept of stiction solutions: these are the Carathéodory solutions that are physically relevant, i.e., the ones that follow the stiction law. However, we find that some of the stiction solutions are forward nonunique in subregions of the slip onset. We call these solutions singular, in contrast to the regular stiction solutions that are forward unique. In order to further the understanding of the nonunique dynamics, we introduce a regularization of the model. This gives a singularly perturbed problem that captures the main features of the original discontinuous problem. We identify a repelling slow manifold that separates the forward slipping from the forward sticking solutions, leading to a high sensitivity to the initial conditions. On this slow manifold we find canard trajectories that have the physical interpretation of delaying the slip onset. We show that the regularized problem has a family of periodic orbits interacting with the canards. We observe that this family has a saddle stability and that it connects, in the rigid body limit, the two regular, slip-stick branches of the discontinuous problem, which were otherwise disconnected." @default.
- W2725365103 created "2017-07-14" @default.
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- W2725365103 date "2017-01-01" @default.
- W2725365103 modified "2023-09-25" @default.
- W2725365103 title "Canards in Stiction: On Solutions of a Friction Oscillator by Regularization" @default.
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- W2725365103 doi "https://doi.org/10.1137/17m1120774" @default.
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