Accurate, Guaranteed Stable, Sliding Discrete Fourier Transform [DSP Tips &amp; Tricks

Duda, Krzysztof

doi:10.1109/msp.2010.938088

Cited by 92 publications

(101 citation statements)

References 3 publications

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“…This is accomplished by the multiplication of the input signal x½n by the modulation sequence W −k n N . This approach allows to exclude the complex twiddle factor from the resonator and avoids accumulated errors and potential instabilities [9]. The recursive realization of the mSDFT is:…”

Section: Modulated Sliding Discrete Fourier Transformmentioning

confidence: 99%

Single Bin Sliding Discrete Fourier Transform

Orallo¹,

Carugati²

2017

Fourier Transforms - High-Tech Application and Current Trends

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Section: Modulated Sliding Discrete Fourier Transformmentioning

confidence: 99%

Single Bin Sliding Discrete Fourier Transform

Orallo¹,

Carugati²

2017

Fourier Transforms - High-Tech Application and Current Trends

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“…1 is known. In [8], [11] it is suggested to use the sliding discrete Fourier transform (SDFT) [12]- [14] to calculate the fundamental voltage U s1 and current I s1 components based on consecutive measurement samples (shown in Fig. 6) in a computationally efficient manner.…”

Section: Load Angle Estimationmentioning

confidence: 99%

Robust sensorless load angle control for stepping motors

Derammelaere

Verbelen

Stockman

2015

2015 18th International Conference on Electrical Machines and Systems (ICEMS)

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Abstract-In industry, the bulk of the stepping motors is driven in open loop full-step mode with maximum current to avoid step loss. This results in noisy operation due to torque ripples and a poor energy-efficiency. To tackle these problems the current current level at which the stepping motor is driven can be reduced to an optimal level. In this paper, a sensorless load angle controller is proposed and implemented to optimise the drive current level. However, reducing the current level results in a diminished torque margin for load disturbances. In this paper, a countermeasure to enhance the robustness of the sensorless load angle controller against torque disturbances is proposed and assessed trough measurements.

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“…DFT may be computed recursively using sliding window techniques [17]. Main problem associated with computing DFT of power grid signals is its spectral leakage resulting from varying fundamental frequency of the grid.…”

Section: Power System Modelmentioning

confidence: 99%

Power Grid Impedance Tracking With Uncertainty Estimation Using Two Stage Weighted Least Squares

Borkowski¹,

Barczentewicz²

2014

Metrology and Measurement Systems

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The paper presents a new method for simultaneous tracking of varying grid impedance and its uncertainty bounds. Impedance tracking consists of two stages. In the first stage, the actual noise estimate is obtained from least squares (LS) residua. In the second stage, the noise covariance matrix is approximated with the use of residual information. Then weighted least squares (WLS) method is applied in order to estimate impedance and background voltage. Finally uncertainty bounds for impedance estimation are computed. The robustness of the method has been verified using simulated signals. The proposed method has been compared to sliding LS. The results have shown, that the method performs much better than the LS for all considered cases, even in the presence of significant background voltage variations.

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Accurate, Guaranteed Stable, Sliding Discrete Fourier Transform [DSP Tips & Tricks

Cited by 92 publications

References 3 publications

Single Bin Sliding Discrete Fourier Transform

Single Bin Sliding Discrete Fourier Transform

Robust sensorless load angle control for stepping motors

Power Grid Impedance Tracking With Uncertainty Estimation Using Two Stage Weighted Least Squares

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