Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2002.11b
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- Pages.182-186
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- 2002
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- 1598-2548(pISSN)
Development of a Low Frequency Vibration Shaker Using Force Frequency Shifting
가진주파수 이동현상을 이용한 저주파 가진기의 개발
- Lee, Gun-Myung ;
- Koss, L.L. ;
- Lee, Jung-Soo
- Published : 2002.11.01
Abstract
If a sinusoidal excitation force moves back and forth along a structure with a certain frequency, the structure will be excited with the difference frequency of these two frequencies. A low frequency vibration shaker has been developed using this force frequency shifting without actually moving a shaker. The shaker consists of an ordinary eccentric mass shaker, a plate, constant springs, and time varying dampers. The dampers are turned on and off in a sequential manner to simulate a traveling slide of an excitation force. The operation of the shaker is simulated by solving the equations of motion of the shaker. Characteristics of the shaker have been found and they will be utilized to design efficient low frequency shakers.