Abstract
A self-excited vibration induced in an externally pressurized, recessed-type gas bearing is applicable to a pneumatic vibrator. An orifice and a chamber connected to a recess produce a self-excited vibration describing a limit cycle, the amplitude and frequency of which vary with the area of the orifice and the volume of the chamber. In this paper, it is proposed, utilizing such a phenomenon, to provide the recess with an orifice of variable area and a chamber of variable volume as a powerful method to control the amplitude and frequency of the vibration, in addition to the conventional method of changing the supply pressure and the load, and the controlling ability of the proposed method is discussed theoretically and experimentally.
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