Active distortion cancelation of sinusoidal sources

Sujbert, László; Vargha, B.

doi:10.1109/imtc.2004.1351054

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…This method, called adaptive Fourier analyzer (AFA), allows locking the resonator structure to the fundamental frequency of the signal in a PLL-like manner, following slow frequency drifts [3,4]. It has been used successfully in several industrial applications, such as a vector voltmeter [3,4], and active noise and distortion cancellation [5,6].…”

Section: Introductionmentioning

confidence: 99%

Vibration damping with negative capacitance shunts: theory and experiment

Marneffe

Preumont

2008

Smart Mater. Struct.

143

124

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The novel frequency adaptation scheme is based on the adaptive Fourier analyzer suggested by Nagy. The frequency adaptation method was elaborated with a view to realizing a detector connectivity check on an FPGA in a new beam loss monitoring (BLM) system, currently being developed for beam setup and machine protection of the particle accelerators at the European Organisation for Nuclear Research (CERN). The paper summarizes the Fourier analyzer to the extent relevant to this work and the basic principle of the related frequency adaptation methods. It then outlines the suggested new scheme, presents practical considerations for implementing it and underpins it with an example and the corresponding operational experience. K : Control and monitor systems online; Data processing methods; Detector control systems (detector and experiment monitoring and slow-control systems, architecture, hardware, algorithms, databases); Digital signal processing (DSP)

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Section: Introductionmentioning

confidence: 99%

Vibration damping with negative capacitance shunts: theory and experiment

Marneffe

Preumont

2008

Smart Mater. Struct.

143

124

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“…It can be verified by comparing (6) and (12): y n has an extra multiplicative term K n which can be included into (2).…”

Section: Data Loss In the Rbomentioning

confidence: 91%

“…The RBO has proven to be robust in different real-life applications [1], [2], [5], [6], where the measurement is corrupted by noise, and the analog part of the system shows weak nonlinear behavior. Recently, some experiments have shown that RBO can also tolerate some data loss [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Resonator-Based Harmonic Estimation in the Case of Data Loss

Orosz

Sujbert

Peceli

2013

IEEE Trans. Instrum. Meas.

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This paper investigates the behavior of the spectral resonator-based spectral observer (RBO) for lossy measurements. The RBO is an efficient real-time method designed for measuring the harmonic components of periodic signals. Recently, some experiments have shown that RBO can tolerate some data loss, but no exact criteria of the convergence have been available. The main contribution of this paper is a set of conditions which enable to predict whether the observer is able to find the harmonic components or not. The necessary condition of convergence helps to recognize the situations when the error-free estimation of the harmonic components is not possible. The sufficient conditions of convergence give safe regions of data loss parameters (e.g., data loss ratio) where the unbiased harmonic estimation can always be ensured. Simulations are also presented to demonstrate the effect of data loss in different situations.Index Terms-Convergence, data loss, missing observations, recursive spectrum analysis, resonator-based observer (RBO).

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“…It is designed directly for periodic noise control and has proven to work efficiently [2]. The concept of the controller was successfully applied for a slightly different problem, as well [3]. The key element of the of the structure is the adaptive Fourier analyzer (AFA), which is a structurally adaptive system for exact measurement of band-limited periodic signals of arbitrary fundamental frequency [5].…”

Section: B Noise Controllermentioning

confidence: 99%

Wireless Sensing for Active Noise Control

Sujbert¹

2006

2006 IEEE Instrumentation and Measurement Technology Conference Proceedings

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Our paper introduces a closed-loop wireless control application based on Berkeley MICAz motes and an Analog Devices AD21061 EZ-KIT LITE board. The system realizes active noise control (ANC) for the suppression of periodic acoustic disturbances. The paper highlights the role of synchronous sampling in wireless ANC applications and introduces the solutions in detail. A PLL-like mechanism takes care of the synchronization, while linear interpolation fits the wireless measurement data for processing in the signal processor. The noise controller is a resonator-based one which has proven its efficiency previously in different physical environments. The working of the system is illustrated by measurement results.

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Active distortion cancelation of sinusoidal sources

Cited by 6 publications

References 5 publications

Vibration damping with negative capacitance shunts: theory and experiment

Vibration damping with negative capacitance shunts: theory and experiment

Analysis of Resonator-Based Harmonic Estimation in the Case of Data Loss

Wireless Sensing for Active Noise Control

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