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Sensors 2016, 16(5), 739; doi:10.3390/s16050739

Induced Voltage Linear Extraction Method Using an Active Kelvin Bridge for Disturbing Force Self-Sensing

Harbin Institute of Technology, D-401 Science Park, No. 2 Yikuang Street, Harbin 150080, China
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Author to whom correspondence should be addressed.
Academic Editors: Subhas Mukhopadhyay and Chinthaka Pasan Gooneratne
Received: 6 March 2016 / Revised: 28 April 2016 / Accepted: 16 May 2016 / Published: 20 May 2016
(This article belongs to the Special Issue Giant Magnetoresistive Sensors)
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Abstract

This paper presents an induced voltage linear extraction method for disturbing force self-sensing in the application of giant magnetostrictive actuators (GMAs). In this method, a Kelvin bridge combined with an active device is constructed instead of a conventional Wheatstone bridge for extraction of the induced voltage, and an additional GMA is adopted as a reference actuator in the self-sensing circuit in order to balance the circuit bridge. The linear fitting of the measurement data is done according to the linear relationship between the disturbing forces and the integral of the induced voltage. The experimental results confirm the good performance of the proposed method, and the self-sensitivity of the disturbing forces is better than 2.0 (mV·s)/N. View Full-Text
Keywords: giant magnetostrictive actuator; self-sensing; Kelvin bridge; induced voltage giant magnetostrictive actuator; self-sensing; Kelvin bridge; induced voltage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, Y.; Wang, L.; Tan, J.; Zhao, B. Induced Voltage Linear Extraction Method Using an Active Kelvin Bridge for Disturbing Force Self-Sensing. Sensors 2016, 16, 739.

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