Accession Number : ADA325092

Title :   Loss Factors of a Complex Composed of a Number of Coupled Harmonic Oscillators.

Descriptive Note : Research and development rept. 1 Nov 96-28 Feb 97,

Corporate Author : NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD

Personal Author(s) : Maidanik, G.

PDF Url : ADA325092

Report Date : FEB 1997

Pagination or Media Count : 43

Abstract : Investigation of the response of a complex composed of a number of coupled harmonic oscillators is conducted. One of the harmonic oscillators is designated as the master, the others as satellites. The expression for the loss factor of the coupled master harmonic oscillator is sought. Two distinct loss factors are defined; the prevailing loss factor and the effective loss factor. The first is defined in terms of the real part of the inverse of the normalized in situ admittance of the master harmonic oscillator. The second is defined in terms of the ratio of the normalized input power into the master harmonic oscillator to the normalized stored energy in the complex due to that power injection. The relationship and the contrast between these two loss factors are revealed. It is argued that, with the exception of an isolated master harmonic oscillator, the prevailing loss factor is apparent; it is the effective loss factor that is real. whereas the prevailing loss factor invokes the question: 'where did the energy go?,' the effective loss factor renders this question moot. Under certain approximations, expressions for the effective loss factor are derived, in this report, which are reminiscent of an expression that was recently derived for the effective loss factor of a structural fuzzy. The latter expression was derived via statistical energy analysis (SEA). atter

Descriptors :   *RADIOFREQUENCY OSCILLATORS, COUPLING(INTERACTION), ARRAYS, LOW LOSS, STATISTICAL ANALYSIS, ENERGY STORAGE, ADMITTANCE.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE