Malhotra, R. K. (1964) Free and forced oscillations of a class of selfexcited oscillators. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechEERL:1964.DYNL.1964.001

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Abstract
Free and forced oscillations in oscillators governed by the equation [MATHEMATICAL NOTATION GOES HERE. VIEW IT IN THE DOCUMENT] are studied with appropriate constraints on [MATHEMATICAL NOTATION GOES HERE. VIEW IT IN THE DOCUMENT]. Theorems are proved on the existence and uniqueness of stable periodic solutions for free oscillations using the PoincaréBendixson theory in the phaseplane. There follow several examples to illustrate the theorems and limit cycles are obtained for these examples by the Liénard construction. A result on the existence of periodic solutions in the forced case is obtained by use of Brouwer's fixed point theorem. The part on topological methods is concluded by applying Yoshizawa's results on ultimate boundedness of solutions to the forced case. Approximate analytical solutions are obtained for specific examples for different regions of validity of the parameter (. For free oscillations, the perturbation solution is obtained for small (. A Fourier series approximation is given for other values of (, and the limit cycle for the case ( (tm)co is obtained. Finally, the first order solution for forced oscillations is obtained by the method of slowly varying parameters and the stability of this solution is examined.
Item Type:  Report or Paper (Technical Report) 

Group:  Dynamics Laboratory 
Record Number:  CaltechEERL:1964.DYNL.1964.001 
Persistent URL:  http://resolver.caltech.edu/CaltechEERL:1964.DYNL.1964.001 
Usage Policy:  You are granted permission for individual, educational, research and noncommercial reproduction, distribution, display and performance of this work in any format. 
ID Code:  26498 
Collection:  CaltechEERL 
Deposited By:  Imported from CaltechEERL 
Deposited On:  20 Jun 2002 
Last Modified:  26 Dec 2012 13:59 
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