Download Hopf Bifurcation Analysis: A Frequency Domain Approach by Jorge L Moiola PDF

By Jorge L Moiola

This ebook is dedicated to the frequency area procedure, for either typical and degenerate Hopf bifurcation analyses. in addition to displaying that the time and frequency area ways are in reality identical, the truth that many major effects and computational formulation bought within the reports of standard and degenerate Hopf bifurcations from the time area technique may be translated and reformulated into the corresponding frequency area surroundings, and be reconfirmed and rediscovered by utilizing the frequency area tools, is additionally defined. the outline of the way the frequency area technique can be utilized to procure different types of ordinary bifurcation stipulations for basic nonlinear dynamical structures is given in addition to is validated a really wealthy pictorial gallery of neighborhood bifurcation diagrams for nonlinear platforms below simultaneous adaptations of a number of procedure parameters. along side this graphical research of neighborhood bifurcation diagrams, the defining and nondegeneracy stipulations for a number of degenerate Hopf bifurcations is gifted. With loads of algebraic computation, a few higher-order harmonic stability approximation formulation are derived, for examining the dynamical habit in small neighborhoods of specific sorts of degenerate Hopf bifurcations that contain a number of restrict cycles and a number of restrict issues of periodic strategies. moreover, functions in chemical, mechanical and electric engineering in addition to in biology are mentioned. This e-book is designed and written in a method of study monographs instead of lecture room textbooks, in order that the latest contributions to the sphere might be integrated with references.

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These include cases like multiple limit cycles, multiple bifurcation points, emergence of new periodic solutions (the so-called isolas) that are disconnected from the steady-state curves, etc. The most remarkable work in this direction include the contributions of Chafee [1968, 1978], Takens [1973], Hassard k Wan [1978], Kielhofer [1979], Gobber k Willamowsky [1979], Golubitsky k Langford [1981], and Golubitsky k Schaeffer [1985]. Generalizations of the Hopf bifurcation theorem usually take into account, at least implicitly, a multi-parameter variation in the original ODE setting.

Since the locus of A(w; /i) passes through the point — 1 + iO when (i = 0, H = 0 is a bifurcation point. It then follows from the Nyquist criterion (and the time-domain analysis as well) that in this case the diode system has a stable equilibrium solution of zero amplitude, which corresponds to (*i,*2) = (0,0). 30 2. com by NANYANG TECHNOLOGICAL UNIVERSITY on 09/30/15. For personal use only. ),. 9. The frequency graph (eigenlocus) of the tunnel diode oscillator. The loci of the eigenvalue A(w;/I) corresponding to different values of Ji are shown in Fig.

Now, we are ready to state the following results about singularities. 1. A necessary condition for (wo. Mo) to be a singular point is Fi(u>0,fio) = F2(uj0,fio) = 0. 6) Proof. This follows immediately from a direct application of the generalized Nyquist stability criterion, because the closed-loop characteristic polynomial of the feedback system shown in Fig. 5 has at least one pole located on the imaginary axis. 0 We will show a few more necessary conditions in the following. At this point, we would like to mention that sufficient conditions, particularly suf­ ficient conditions for distinguishing the different types of bifurcations, are available in the literature [Hale & Kogak, 1991].

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