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Sensors 2017, 17(3), 494; doi:10.3390/s17030494

An Adaptive Damping Network Designed for Strapdown Fiber Optic Gyrocompass System for Ships

Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
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Academic Editor: Vittorio M. N. Passaro
Received: 6 December 2016 / Revised: 28 February 2017 / Accepted: 28 February 2017 / Published: 2 March 2017
(This article belongs to the Section Physical Sensors)
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Abstract

The strapdown fiber optic gyrocompass (strapdown FOGC) system for ships primarily works on external horizontal damping and undamping statuses. When there are large sea condition changes, the system will switch frequently between the external horizontal damping status and the undamping status. This means that the system is always in an adjustment status and influences the dynamic accuracy of the system. Aiming at the limitations of the conventional damping method, a new design idea is proposed, where the adaptive control method is used to design the horizontal damping network of the strapdown FOGC system. According to the size of acceleration, the parameters of the damping network are changed to make the system error caused by the ship’s maneuvering to a minimum. Furthermore, the jump in damping coefficient was transformed into gradual change to make a smooth system status switch. The adaptive damping network was applied for strapdown FOGC under the static and dynamic condition, and its performance was compared with the conventional damping, and undamping means. Experimental results showed that the adaptive damping network was effective in improving the dynamic performance of the strapdown FOGC. View Full-Text
Keywords: strapdown fiber optic gyrocompass (strapdown FOGC); adaptive damping network; overshoot error; external horizontal damping; dynamic performance strapdown fiber optic gyrocompass (strapdown FOGC); adaptive damping network; overshoot error; external horizontal damping; dynamic performance
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MDPI and ACS Style

Sun, J.; Xu, X.; Liu, Y.; Zhang, T.; Li, Y.; Tong, J. An Adaptive Damping Network Designed for Strapdown Fiber Optic Gyrocompass System for Ships. Sensors 2017, 17, 494.

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