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JACIII Vol.20 No.2 pp. 287-293
doi: 10.20965/jaciii.2016.p0287
(2016)

Paper:

A Linear Least Square with Duffing Chaotic Detection Designed in Micro-Distance Movement Measurement System

Xiao Lin*, Yaping Dai*, and Linhui Zhao**

*School of Automation, Beijing Institute of Technology
No.5 Zhongguancun South Street, Haidian District, Beijing 100081, China
**School of Mechatronics, Beijing Union University
Baijiazhuang Xili Street, Chaoyang District, Beijing 100020, China

Received:
November 10, 2015
Accepted:
December 10, 2015
Online released:
March 18, 2016
Published:
March 20, 2016
Keywords:
Duffing, chaos detection system, capacitance sensor, weak signal detection
Abstract

High precision micro displacement measurement framework is fundamental for drilling strain gauges. We replaced the traditional lock-in amplifier method by the linear least square (LLS) based on Duffing chaotic detection (DCD) in drilling strain gauges. Simulation results showed that LLS based on DCD has a relative error 7.7% when SNR = −20.79 dB. It is 410.1% lower than lock-in amplifier method in the detection. Even more, the design and realization of LLS based on DCD is easier than lock-in amplifier method.

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Last updated on May. 26, 2017