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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/7054
Title: Amplitude and frequency estimation of exponentially decaying sinusoids
Authors: Tomar S.
Sumathi P.
Published in: IEEE Transactions on Instrumentation and Measurement
Abstract: An online method for amplitude and frequency estimation of exponentially decaying sinusoids is proposed with a moving-window discrete Fourier transform (MWDFT) filter and frequency-locked loop. The tuned filter characteristics of MWDFT is modified into more flat characteristic around the center frequency with negative feedback, which increases the bandwidth of the filter. An adaptive sampling pulse adjustment mechanism is incorporated in the proposed structure for online estimation of frequency. Hence, the frequency error was exploited to achieve synchronization between in-phase component of MWDFT and input signal of estimation. The amplitude is estimated in online from the in-phase and quadrature-phase components of MWDFT. The performance of the proposed method is compared with the existing techniques and experimentally validated on single-link flexible manipulator system for the online estimation of frequency and amplitude of tip deflection signal. The experimental investigation prove that the proposed online technique performs well over the existing techniques. © 2017 IEEE.
Citation: IEEE Transactions on Instrumentation and Measurement (2018), 67(1): 229-237
URI: https://doi.org/10.1109/TIM.2017.2755998
http://repository.iitr.ac.in/handle/123456789/7054
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Exponentially decaying sinusoid
Single-link flexible manipulator (SLFM)
Sinusoidal amplitude and frequency estimation
Vibration estimation
ISSN: 189456
Author Scopus IDs: 57196097880
56998549500
Author Affiliations: Tomar, S., Space Application Centre, Indian Space Research Organization, Ahmedabad, 380015, India
Sumathi, P., Department of Electrical Engineering, IIT Roorkee, Roorkee, 247 667, India
Funding Details: Manuscript received April 4, 2017; revised July 3, 2017; accepted August 8, 2017. Date of publication October 9, 2017; date of current version December 7, 2017. This work was supported by the Department of Science and Technology, India, under Project SR/FTP/ETA-68/2011. The Associate Editor coordinating the review process was Dr. Wendy Van Moer. (Corresponding author: Parasuraman Sumathi.) S. Tomar is with the Space Application Centre, Indian Space Research Organization, Ahmedabad 380015, India (e-mail: shikha.tomar279@gmail.com).
Corresponding Author: Sumathi, P.; Department of Electrical Engineering, IIT RoorkeeIndia; email: psumifee@iitr.ac.in
Appears in Collections:Journal Publications [EE]

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