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Open AccessArticle

Multiple Fusion Based on the CCD and MEMS Accelerometer for the Low-Cost Multi-Loop Optoelectronic System Control

by Yong Luo 1,2,3, Yao Mao 1,2, Wei Ren 1,2,3, Yongmei Huang 1,2,*, Chao Deng 1,2,3 and Xi Zhou 1,2
1
Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China
2
Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China
3
University of Chinese Academy of Sciences, Beijing 100039, China
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(7), 2153; https://doi.org/10.3390/s18072153
Received: 2 May 2018 / Revised: 30 June 2018 / Accepted: 2 July 2018 / Published: 4 July 2018
(This article belongs to the Special Issue Inertial Sensors and Systems 2018)
In the charge-coupled device (CCD) and micro-electro-mechanical system (MEMS) accelerometer based low-cost multi-loop optoelectronic control system (OCS), due to accelerometers’ drift and noise in low frequency, the disturbance suppression (DS) is insufficient. Previously, based on the acceleration and position dual-loop control (ADLC), researchers combined a disturbance observer (DOB) with a virtual velocity loop to make some medium-frequency DS exchange for low-frequency performance. However, it is not optimal because the classic DOB based on accelerometers’ inaccurate signals cannot observe accurate disturbance in low frequency and the velocity based on a CCD and accelerometer time-domain fusion carried the CCD’s delay, resulting in the drop of medium-frequency DS. In this paper, considering the CCD’s advantage in low frequency and the accelerometer’s strength in high frequency, we propose to fuse their signals twice with a modified complementary filter method to respectively acquire an acceleration and velocity. The new acceleration with no drift and less noise but lower bandwidth creates a new acceleration model and is only used in fusion DOB (FDOB), while the velocity with little delay is to build an additional velocity loop. Compared with the traditional DOB enhanced by the time-domain fusion velocity loop, experiments verify that the proposed multiple fusion would apparently enhance the system’s DS, especially in low and medium frequency. View Full-Text
Keywords: multiple fusion; the optoelectronic control system; disturbance suppression; low-cost; disturbance observer; virtual velocity loop multiple fusion; the optoelectronic control system; disturbance suppression; low-cost; disturbance observer; virtual velocity loop
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Luo, Y.; Mao, Y.; Ren, W.; Huang, Y.; Deng, C.; Zhou, X. Multiple Fusion Based on the CCD and MEMS Accelerometer for the Low-Cost Multi-Loop Optoelectronic System Control. Sensors 2018, 18, 2153.

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