Performance analysis of digitally controlled nonlinear systems considering time delay issues

Yanarateş, Cağfer; Okur, Serkan; Altan, Aytaç

doi:10.1016/j.heliyon.2023.e20994

Cited by 21 publications

(4 citation statements)

References 21 publications

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“…ZOH affects phase and gain, while time delay affects phase [35]. Given that the crossover or cut-off frequency should be 5 to 10 times less than the switching frequency [36], the lost gain from ZOH can be mitigated, so only phase loss is analyzed. ZOH in Laplace form is given by Equation ( 20), and time delay is given by Equation ( 21):…”

Section: Analysis Of Delays Introduced By Digital Controlmentioning

confidence: 99%

Response Time Reduction of DC–DC Converter in Voltage Mode with Application of GaN Transistors and Digital Control

Kroičs,

Gaspersons,

Elkhateb

2024

Electronics

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This paper discusses the potential to decrease the response time of a DC–DC converter through the substitution of Si transistors with GaN transistors and the implementation of digital control techniques. This paper introduces an improved methodology for designing digital voltage controllers by analyzing discretization delays and subsequently implementing a modified analog controller design method. The theoretical analysis was verified using an experimental prototype of a 100 W 48 V to 12 V GaN-based DC–DC converter. A digital controller that allows a 50 kHz bandwidth to be achieved based on an STM32G4 microcontroller was developed, and the design of the controller is discussed in detail. The converter was operated with a 500 kHz switching frequency using a 6 µH inductor and a 20 µF ceramic capacitor output filter. Although the digital control introduced a 1.2 µs delay, a converter response time equal to 40 µs was achieved. Simulation models were created and their results were verified via comparisons with experimental results obtained with an AP310 frequency response analyzer.

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Section: Analysis Of Delays Introduced By Digital Controlmentioning

confidence: 99%

Response Time Reduction of DC–DC Converter in Voltage Mode with Application of GaN Transistors and Digital Control

Kroičs,

Gaspersons,

Elkhateb

2024

Electronics

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“…The process of deep drawing is a significant method in sheet metal forming. In recent years, product miniaturization has rapidly developed [4][5][6][7][8][9][10]. Therefore, the researchers promoted the field of micro deep drawing in advanced manufacturing applications of microproducts, focusing on decreasing their weight and volume.…”

Section: Introductionmentioning

confidence: 99%

“…The blank's diameter, shown in Figure(5), was 15 mm, and its thickness was 0.25 mm. The die and tool of deep drawing were designed to carry out the experimental procedures required to produce a cylindrical cup with an outer diameter of five millimeters as shown in Figure(6). The micro-deep drawing process was performed using the drawing die, as shown in Figure(7).…”

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confidence: 99%

Lubricating materials as a novel approach to reduce defects of micro-deep drawing forming process

Khalil,

Shaker,

Yaseen

et al. 2024

J Appl Eng Science

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The deep drawing forming process, classified under sheet metal working, is a promising and essential metal forming process that has attracted much interest due to its wide application in micro-production. The process parameters, such as the cross-head speed of the machine, have a significant influence on the quality of the product. The impact of two essential parameters was investigated to minimize or eliminate the product's production defects, such as thinning, tearing, and scratching. The first one was the impact of using two types of lubricating oil (grease and wax), and the products were compared with the dry condition (without using a lubricating oil). The second is the impact of changing the cross-head speed of the machine from 5 to 15 mm/min. This work aims to determine the optimum operating condition that prevents any defect in the product. The results showed that using lubricating oil resulted in better product shape, and the wax is better than grease in eliminating product defects. In addition, the results showed that the lower machine speed is preferred for eliminating production defects, where the final product has no obvious thinning, tearing, or scratching. The final product shape was evaluated visually because eye observation is the only way to judge the product shape.

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“…Natural language processing (NLP), data visualization, and other techniques [ 12 ] have recently offered effective and efficient techniques to extract important and valuable information from social network data. Issues that concern society such as climate change are discussed in social media and blog posts, and people express their views on this issue.…”

Section: Introductionmentioning

confidence: 99%

Exploring climate change discourse on social media and blogs using a topic modeling analysis

Gokcimen,

Das

2024

Heliyon

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Performance analysis of digitally controlled nonlinear systems considering time delay issues

Cited by 21 publications

References 21 publications

Response Time Reduction of DC–DC Converter in Voltage Mode with Application of GaN Transistors and Digital Control

Response Time Reduction of DC–DC Converter in Voltage Mode with Application of GaN Transistors and Digital Control

Lubricating materials as a novel approach to reduce defects of micro-deep drawing forming process

Exploring climate change discourse on social media and blogs using a topic modeling analysis

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