Michelson interferometric fiber sensor for beam vibration control

Chan-Shin Chou

doi:10.1117/12.173986

1 May 1994 Michelson interferometric fiber sensor for beam vibration control

Chan-Shin Chou

Proceedings Volume 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation; (1994) https://doi.org/10.1117/12.173986
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

A fiber-optic Michelson interferometer is employed for sensing the vibration of a cantilevered beam. A small section of the sensing fiber arm is attached to the beam to sense the vibration of the beam. The active homodyne technique is used to obtain an electrical output which is proportional to the vibrational signal of the beam. A closed-loop control system comprises a pair of sensors and actuators, which are mounted nearly at the same point of the vibrating body, and an inverting power amplifier. The fiber sensor and a piezoelectric actuator are co- located on the root of the cantilevered beam. The fiber sensed signal is amplified and inverted, then fed into a piezoelectric actuator for exerting a dynamic control force on the body. Experimental results show that vibration of the beam is substantially reduced by applying a single control system with the fiber-optic Michelson interferometric vibration sensor.

Citation Download Citation

Chan-Shin Chou "Michelson interferometric fiber sensor for beam vibration control", Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); https://doi.org/10.1117/12.173986

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