高調波励振を受ける振動系の基礎的研究

抄録

Higher harmonics are integer multiples of fundamental frequency. They have bad influence on various types of electric equipment. There are many studies of higher harmonics in both electrical and mechanical field. However, there are a few studies about control of higher harmonics.In this study, we investigate response of a cantilever beam excited by fundamental waveform with third harmonic frequency experimentally. The fundamental frequency equals to the second resonance frequency of the beam 40Hz, and the third harmonic frequency is 120Hz. Our experiments present that the control method of the waveform of the beam displacement at free end. Our control method changes the intensity and phase difference of third harmonic frequency of control signal.