• Title/Summary/Keyword: Vibration Sensors

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Study on Process Monitoring of Elliptical Vibration Cutting by Utilizing Internal Data in Ultrasonic Elliptical Vibration Device

  • Jung, Hongjin;Hayasaka, Takehiro;Shamoto, Eiji
    • International Journal of Precision Engineering and Manufacturing-Green Technology
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    • v.5 no.5
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    • pp.571-581
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    • 2018

  • In the present study, monitoring of elliptical vibration cutting process by utilizing internal data in the ultrasonic elliptical vibration device without external sensors such as a dynamometer and displacement sensor is investigated. The internal data utilized here is the change of excitation frequency, i.e. resonant frequency of the device, voltages applied to the piezoelectric actuators composing the device, and electric currents flowing through the actuators. These internal data change automatically in the elliptical vibration control system in order to keep a constant elliptical vibration against the change of the cutting process. Correlativity between the process and the internal data is described by using a vibration model of ultrasonic elliptical vibration cutting and verified by several experiments, i.e. planing and mirror surface finishing of hardened die steel carried out with single crystalline diamond tools. As a result, it is proved that it is possible to estimate the elements of elliptical vibration cutting process, e.g. tool wear and machining load, which are important for stable cutting in such precision machining.

  • https://doi.org/10.1007/s40684-018-0059-9 인용 KSCI

Active Damping of an Electric Connector with Piezoelectric Materials (압전 재료를 이용한 전기 차단기의 능동제진)

  • 노용래
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1992.10a
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    • pp.92-97
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    • 1992

  • Undesired vibratory motion of an electric connector is controlled in an active method with piezoelectric sensors and actuators. A special electric control box is developed which is suitable for the purpose. Experimental results show that the system can effectively reduce amplitude responses connector to external forces.

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