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Proceedings Paper

Effects of phase-drift on measure accuracy in the closed loop of resonant sensors
Author(s): Chenguang Cai; Shangchun Fan; Weiwei Xing
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Paper Abstract

Every component characteristic in the closed loop of resonant sensors is analyzed. Based on the component characteristics, the relation between the excitation force and the displacement of the resonator is confirmed. And the closed loop differential equation of resonant sensors is build. The phase drift of the closed loop control system is brought into the differential equation. By solving the differential equation with phase error of the closed loop control system, the relation between phase drift and the difference between the resonant frequency of the closed loop and the natural frequency of the resonator is gained. It is found that the measure error between the resonator natural frequency and the resonant frequency of the closed loop is proportional to tangent of the phase drift of the closed loop control system. The proportion coefficient is negative -3dB bandwidth of the resonator.

Paper Details

Date Published: 28 October 2006
PDF: 5 pages
Proc. SPIE 6358, Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, 63580R (28 October 2006); doi: 10.1117/12.717797
Show Author Affiliations
Chenguang Cai, Beihang Univ. (China)
Shangchun Fan, Beihang Univ. (China)
Weiwei Xing, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 6358:
Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation
Jiancheng Fang; Zhongyu Wang, Editor(s)

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