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dc.contributor.authorTomar S.-
dc.contributor.authorSumathi, Parasuraman-
dc.identifier.citationIEEE Transactions on Instrumentation and Measurement (2018), 67(1): 229-237-
dc.description.abstractAn 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.-
dc.publisherInstitute of Electrical and Electronics Engineers Inc.-
dc.relation.ispartofIEEE Transactions on Instrumentation and Measurement-
dc.subjectExponentially decaying sinusoid-
dc.subjectSingle-link flexible manipulator (SLFM)-
dc.subjectSinusoidal amplitude and frequency estimation-
dc.subjectVibration estimation-
dc.titleAmplitude and frequency estimation of exponentially decaying sinusoids-
dc.affiliationTomar, S., Space Application Centre, Indian Space Research Organization, Ahmedabad, 380015, India-
dc.affiliationSumathi, P., Department of Electrical Engineering, IIT Roorkee, Roorkee, 247 667, India-
dc.description.fundingManuscript 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:
dc.description.correspondingauthorSumathi, P.; Department of Electrical Engineering, IIT RoorkeeIndia; email:
Appears in Collections:Journal Publications [EE]

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