A Note on Moving Poles in Nonlinear Oscillating Systems

Since poles of the complex imnmittance of a linear system represent the decrements and frequencies of rotating phasors in the linear time domain, it is suggested that a nonlinear system might be represented by moving poles whose instaneous decrements and frequencies are associated with phasors rotating in the nonlinear or time-distorted phase space. This idea is applied to the analysis of a class of nonlinear oscillation generators of the second order which is described by the differential equation, ¿-N1(¿, X)=0.