A feedback weighted fusion algorithm with dynamic sensor bias correction for gyroscope array

• Autorzy: Yuan Ding , Qin Yongyuan , Shen Xiaowei , Wu Zongwei

Identyfikatory

DOI

10.24425/mms.2021.136000

• Języki publikacji: EN

Abstrakty

EN

Low-cost Micro-Electromechanical System (MEMS) gyroscopes are known to have a smaller size, lower weight, and less power consumption than their more technologically advanced counterparts. However, current low-grade MEMS gyroscopes have poor performance and cannot compete with quality sensors in high accuracy navigational and guidance applications. The main focus of this paper is to investigate performance improvements by fusing multiple homogeneous MEMS gyroscopes. These gyros are transformed into a virtual gyro using a feedback weighted fusion algorithm with dynamic sensor bias correction. The gyroscope array combines eight homogeneous gyroscope units on each axis and divides them into two layers of differential configuration. The algorithm uses the gyroscope array estimation value to remove the gyroscope bias and then correct the gyroscope array measurement value. Then the gyroscope variance is recalculated in real time according to the revised measurement value and the weighted coefficients and state estimation of each gyroscope are deduced according to the least square principle. The simulations and experiments showed that the proposed algorithm could further reduce the drift and improve the overall accuracy beyond the performance limitations of individual gyroscopes. The maximum cumulative angle error was -2.09 degrees after 2000 seconds in the static test, and the standard deviation (STD) of the output fusion value of the proposed algorithm was 0.006 degrees/s in the dynamic test, which was only 1.7% of the STD value of an individual gyroscope.

Słowa kluczowe

EN

inertial sensor; gyroscope array; weighted fusion; bias correction

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2021
• Tom: Vol. 28, nr 1
• Strony: 161--179
• Opis fizyczny: Bibliogr. 32 poz., rys., tab., wykr., wzory

Twórcy

autor

Yuan Ding

• School of Automation, Northwestern Polytechnical University, Xi’an 710129, China

autor

Qin Yongyuan

• School of Automation, Northwestern Polytechnical University, Xi’an 710129, China

autor

Shen Xiaowei

• Xi’an Research Institute of High Technology, Hongqing Town, Xi’an 710025, China

autor

Wu Zongwei

• Xi’an Research Institute of High Technology, Hongqing Town, Xi’an 710025, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).