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Sensors 2016, 16(10), 1625; doi:10.3390/s16101625

A Missile-Borne Angular Velocity Sensor Based on Triaxial Electromagnetic Induction Coils

Institute of Signal Capturing & Processing Technology, Key Laboratory of Shanxi Province, North University of China, Taiyuan 030051, China
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Author to whom correspondence should be addressed.
Academic Editors: Subhas Mukhopadhyay and Chinthaka Pasan Gooneratne
Received: 22 July 2016 / Revised: 21 September 2016 / Accepted: 26 September 2016 / Published: 30 September 2016
(This article belongs to the Special Issue Giant Magnetoresistive Sensors)
View Full-Text   |   Download PDF [3651 KB, uploaded 30 September 2016]   |  

Abstract

Aiming to solve the problem of the limited measuring range for angular motion parameters of high-speed rotating projectiles in the field of guidance and control, a self-adaptive measurement method for angular motion parameters based on the electromagnetic induction principle is proposed. First, a framework with type bent “I-shape” is used to design triaxial coils in a mutually orthogonal way. Under the condition of high rotational speed of a projectile, the induction signal of the projectile moving across a geomagnetic field is acquired by using coils. Second, the frequency of the pulse signal is adjusted self-adaptively. Angular velocity and angular displacement are calculated in the form of periodic pulse counting and pulse accumulation, respectively. Finally, on the basis of that principle prototype of the sensor is researched and developed, performance of measuring angular motion parameters are tested on the sensor by semi-physical and physical simulation experiments, respectively. Experimental results demonstrate that the sensor has a wide measuring range of angular velocity from 1 rps to 100 rps with a measurement error of less than 0.3%, and the angular displacement measurement error is lower than 0.2°. The proposed method satisfies measurement requirements for high-speed rotating projectiles with an extremely high dynamic range of rotational speed and high precision, and has definite value to engineering applications in the fields of attitude determination and geomagnetic navigation. View Full-Text
Keywords: angular velocity; angular displacement; self-adaptive frequency tracking measurement; FPGA angular velocity; angular displacement; self-adaptive frequency tracking measurement; FPGA
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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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Li, J.; Wu, D.; Han, Y. A Missile-Borne Angular Velocity Sensor Based on Triaxial Electromagnetic Induction Coils. Sensors 2016, 16, 1625.

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