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Higher-order averaging schemes in systems with fast and slow phases

โœ Scribed by L.D. Akulenko


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
898 KB
Volume
66
Category
Article
ISSN
0021-8928

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โœฆ Synopsis


Non-linear oscillatory systems containing a fast phase and a relatively slow phase are considered. A modified averaging method is proposed for the situation in which the slow variables, averaged over the fast phase, do not change. A procedure for separating the variables over substantially longer time intervals with respect to a small parameter is proposed and justified; over these extended time intervals, all the variables experience considerable evolution. Examples illustrating the efficiency of the proposed approach are presented.


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## Abstract We consider the problem of minimizing 0<__p__<1, __h__โˆˆโ„, __ฯƒ__>0, among functions __u__:โ„^__d__^โŠƒฮฉโ†’โ„^__d__^, __u__~โˆฃโˆ‚ฮฉ~=0, and measurable characteristic functions ฯ‡:ฮฉโ†’โ„. Here ฦ’^+^~__h__~, ฦ’^โˆ’^, denote quadratic potentials defined on the space of all symmetric __d__ร—__d__ matrices, __