고차스펙트럼 해석법을 이용한 비선형 기계적 시스템에 관한 연구

A Study on the Nonlinear Mechanical Systems using Higher Order Spectral Analysis Methods

In this paper higher order spectral techniques are applied to some simple mechanical systems. The system studied is the nonlinear magnetic beam. This is a simply supported beam, driven by an electromagnetic shaker. At the free end, pairs of repelling magnets are placed. By varying the position and number of magnets, the nature of the nonlinearity can be changed, be it skewed or symmetric, and by varying the distance between the magnets the strength of the nonlinearity can also be altered. Using this controllable system, auto higher order spectral methods are applied, assuming only a knowledge of an output signal.