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Sensors 2017, 17(5), 973; doi:10.3390/s17050973

A Novel MEMS Gyro North Finder Design Based on the Rotation Modulation Technique

Engineering Research Center for Navigation Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
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Academic Editor: Vittorio M. N. Passaro
Received: 15 February 2017 / Revised: 16 April 2017 / Accepted: 24 April 2017 / Published: 28 April 2017
(This article belongs to the Section Physical Sensors)

Abstract

Gyro north finders have been widely used in maneuvering weapon orientation, oil drilling and other areas. This paper proposes a novel Micro-Electro-Mechanical System (MEMS) gyroscope north finder based on the rotation modulation (RM) technique. Two rotation modulation modes (static and dynamic modulation) are applied. Compared to the traditional gyro north finders, only one single MEMS gyroscope and one MEMS accelerometer are needed, reducing the total cost since high-precision gyroscopes and accelerometers are the most expensive components in gyro north finders. To reduce the volume and enhance the reliability, wireless power and wireless data transmission technique are introduced into the rotation modulation system for the first time. To enhance the system robustness, the robust least square method (RLSM) and robust Kalman filter (RKF) are applied in the static and dynamic north finding methods, respectively. Experimental characterization resulted in a static accuracy of 0.66° and a dynamic repeatability accuracy of 1°, respectively, confirming the excellent potential of the novel north finding system. The proposed single gyro and single accelerometer north finding scheme is universal, and can be an important reference to both scientific research and industrial applications. View Full-Text
Keywords: MEMS gyro north finder; north finding; rotation modulation; robust least square method; robust Kalman filter MEMS gyro north finder; north finding; rotation modulation; robust least square method; robust Kalman filter
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MDPI and ACS Style

Zhang, Y.; Zhou, B.; Song, M.; Hou, B.; Xing, H.; Zhang, R. A Novel MEMS Gyro North Finder Design Based on the Rotation Modulation Technique. Sensors 2017, 17, 973.

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