期刊
SIAM JOURNAL ON APPLIED DYNAMICAL SYSTEMS
卷 16, 期 3, 页码 1650-1685出版社
SIAM PUBLICATIONS
DOI: 10.1137/17M1110584
关键词
fast-slow system; multiple time scale dynamics; hysteresis operator; generalized play; canard; Netushil's observation
资金
- Lichtenberg Professorship of the VolkswagenStiftung
- DFG through the International Research Training Group IGDK 1754
- Austrian Science Fund (FWF) [W1244] Funding Source: Austrian Science Fund (FWF)
Hysteresis operators appear in many applications, such as elasto-plasticity and micromagnetics, and can be used for a wider class of systems, where rate-independent memory plays a role. A natural approximation for systems of evolution equations with hysteresis operators are fast-slow dynamical systems, which-in their used approximation form-do not involve any memory effects. Hence, viewing differential equations with hysteresis operators in the nonlinearity as a limit of approximating fast-slow dynamics involves subtle limit procedures. In this paper, we give a proof of Netushil's observation that broad classes of planar fast-slow systems with a two-dimensional critical manifold are expected to yield generalized play operators in the singular limit. We provide two proofs of this observation based upon the fast-slow systems paradigm of decomposition into subsystems. One proof strategy employs suitable convergence in function spaces, while the other considers a geometric strategy via local linearization and patching adapted originally from problems in stochastic analysis. We also provide an illustration of our results in the context of oscillations in forced planar nonautonomous fast-slow systems. The study of this example also strongly suggests that new canard-type mechanisms can occur for two-dimensional critical manifolds in planar systems.
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