Lyapunov coefficients for hopf bifurcations in systems with piecewise smooth nonlinearity

被引：0
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作者：
Zazo, Miriam Steinherr [1 ]
Rademacher, Jens D.M. [1 ]
机构：
[1] Department 3 - Mathematics, University of Bremen, Bremen,28359, Germany
来源：
SIAM Journal on Applied Dynamical Systems | 2020年 / 19卷 / 04期
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摘要：
Motivated by models that arise in controlled ship maneuvering, we analyze Hopf bifurcations in systems with piecewise smooth nonlinear part. In particular, we derive explicit formulas for the generalization of the first Lyapunov coefficient to this setting. This generically determines the direction of branching (super- versus subcriticality), but in general this differs from any fixed smoothening of the vector field. We focus on nonsmooth nonlinearities of the form ui| uj |, but our results are formulated in broader generality for systems in any dimension with piecewise smooth nonlinear part. In addition, we discuss some codimension-one degeneracies and apply the results to a model of a shimmying wheel. © 2020 Society for Industrial and Applied Mathematics Publications. All rights reserved.
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页码：2847 / 2886
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