Selected Structures of Filters With Time-Varying Parameters

Kaszyński, R.; Piskorowski, Jacek

doi:10.1109/tim.2007.908278

Cited by 23 publications

(23 citation statements)

References 15 publications

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“…First-order LTV low-pass lter On the base of the impulse response (16), it is possible to determine the filter response. The responses of the analyzed system for a few cutoff frequency variations (Figure 7(a)) have been presented in Figure 7(b).…”

Section: Examplementioning

confidence: 99%

“…Many theoretical works [1][2][3][4][5] as well as practical applications have been devoted to these systems. In particular, LTV systems can be applied in signal processing [6][7][8][9][10][11], especially in sampling systems [12], signal filtering and noise reduction [7,8,[13][14][15][16][17], and current compensators in power networks [18,19], amplifiers [5,20], chaos generators [21], electromagnetic launchers [22], and medical devices [23]. The main advantages of LTV system application include improvement of the dynamic properties of systems and reduction of the transient state [16,24].…”

Section: Introductionmentioning

confidence: 99%

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Modelling of the First-Order Time-Varying Filters with Periodically Variable Coefficients

Piwowar¹,

Grabowski²

2017

Mathematical Problems in Engineering

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Section: Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling of the First-Order Time-Varying Filters with Periodically Variable Coefficients

Piwowar¹,

Grabowski²

2017

Mathematical Problems in Engineering

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“…The issue with all these methods is the use of time-invariant filters, which result in low transient response. The comparison of the traditional stationary filters with the parametric filters for the DC component estimation indicates much higher efficiency of the time-varying filters [22].…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of the shunt active power filter using a novel adaptive filtering approach

Zoghbi¹,

Berkani²

2021

Turk J Elec Eng & Comp Sci

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This paper introduces an efficient control approach to enhance harmonics mitigation performance of the Shunt Active Power Filter(SAPF). This approach is based on adaptive filters favored by their built-in automatic parameters adaptation capability. The proposed filter, which uses a Variable Leaky Least Mean Square (VLLMS) adaptation, is applied with a modified instantaneous power PQ theory. This enhances its dynamic performance over the use of conventional time-invariant filters, and overcomes its limitations in the presence of non-sinusoidal voltage conditions. The studied SAPF model is simulated in MATLAB/SIMULINK with combinations of non-linear and unbalanced loads. Simulation results indicate a significant improvement in the transient response to less than a quarter of a cycle in its worst case, on top of additional improvements in the steady-state THD value. Moreover, the algorithm's computation efficiency evaluated in an embedded hardware prototype has given a fast execution time of 1.4µs .

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“…However, an important problem related to the signal processing in weighing systems is to design a filter that has a linear phase response and a short transient state at the same time. 8 In the literature, there are several studies on various techniques for dynamic weighing systems. Jafaripanah et al 9 investigated analog adaptive techniques for dynamic load cell compensation.…”

Section: Introductionmentioning

confidence: 99%

Digital Signal Processing–based Dynamic Mass Measurement System for Egg Weighing Process

Yabanova

2017

Measurement and Control

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In this study, an electronic, mechanical and software system, where the weight measurements of eggs can be performed dynamically, is developed. As the speed is an important factor in the production sector, it is of significant importance that the manufactured products be weighed in a rapid and correct manner. For this reason, systems where the products are dynamically weighed are developed. However, as the products are weighed while they are moving in dynamic weighing systems, undesired disturbing effects occur on the measurement signal. The product weights must be measured at required speeds by eliminating this disturbing effect. Dynamic weighing is performed using a load cell. A digital signal processing–based card has been developed to measure the signal received from the load cell and to send it to the computer. The eggs are weighed while they are moving as they roll over the load cell. A program has been developed using the LabVIEW program to receive, filter and analyze the data read and sent to the computer by digital signal processing. In addition, the configuration adjustments of the integrated analog-to-digital converter that reads data from the load cell can also be performed thanks to this program.

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Selected Structures of Filters With Time-Varying Parameters

Cited by 23 publications

References 15 publications

Modelling of the First-Order Time-Varying Filters with Periodically Variable Coefficients

Modelling of the First-Order Time-Varying Filters with Periodically Variable Coefficients

Performance improvement of the shunt active power filter using a novel adaptive filtering approach

Digital Signal Processing–based Dynamic Mass Measurement System for Egg Weighing Process

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