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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Al-Rawashdeh, Ayman Y.
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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A novel approach to simplified and secure message cryptography using chaotic logistic maps and index keys Al-Ofeishat, Hussein Ahmad; Alkasassbeh, Jawdat S.; Alzyoud, Khalaf Y.; Al-Taweel, Farouq M.; Alrawashdeh, Hisham; Al-Rawashdeh, Ayman Y.
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 5: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i5.pp5139-5152

Abstract

This paper proposes a novel method of message cryptography aiming to provide a simple, secure, and highly efficient approach to encryption and decryption. Unlike existing methods that rely on complex logical operations, our method utilizes simple rearrangement operations, reducing computational complexity while ensuring robust security. It employs a sophisticated, high-entropy private key designed to withstand hacking attempts. This key generates two chaotic keys using chaotic logistic map models, which are sorted to form two index keys essential for rearranging message blocks and characters during encryption and decryption. The process is facilitated by two simple operations, Get_index and Get_min, based on the index keys. These operations achieve streamlined procedures without compromising security. The method's speed is evaluated across various message lengths, demonstrating significant improvements in encryption time and throughput. The comparative analysis highlights the superior efficiency of this method compared to existing methods. Rigorous testing confirms that the proposed method meets stringent quality and sensitivity requirements, ensuring robust cryptographic standards. This innovative approach offers a promising solution for secure message encryption and decryption, combining simplicity, security and efficiency to meet the evolving needs of secure communication systems.
Study of operating modes of electromagnetic hammer with adjustable impact energy and blow frequency Al-Rawashdeh, Ayman Y.; Pavlov, Vlademer E.
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 1: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i1.pp64-73

Abstract

The current work was designed to study the operating modes of electromagnetic impact mechanism (electromagnetic hammer) comprising idle and working stroke windings that are enclosed in magnetic conductor, and reciprocating ferromagnetic striker. Investigation was conducted by modelling in MATLAB environment and performing verification tests with different hammers. Simulation model of the hammer was derived using experimentally obtained static characteristic curves of flux linkage and thrust force for each of the windings. Results revealed that at maximum working stroke winding voltage-varying idle stroke winding voltage, the impact energy did not change, but the impact frequency varied between 0-187 bpm. At maximum idle stroke winding voltage and working stroke winding voltage ranging between 0 to maximum value, the impact energy varied between 84-360 J, the impact frequency varied between 96-187 bpm. Maximum losses over the working cycle were associated with electric losses in the hammer windings and can be reduced by reducing winding currents through increasing the striker speed. The mathematical model of the current study allowed quantifying energy parameters of the electromagnetic hammer. The impact machine cycle includes three operating modes, each determines the main energy parameters: efficiency, impact energy, and cycle time.
Calculation of power losses in a frequency inverter Al-Rawashdeh, Ayman Y.; Dunayev, Mikhail Pavlovich; Alzyoud, Khalaf Y.; Dovudov, Sarfaroz U.
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 3: September 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i3.pp1331-1338

Abstract

This study's main goal is to make a new simulation model of the power losses calculation block for frequency converter power switches that can correctly figure out the transistors and diodes' static and dynamic power losses in a 1.5 kW SIEMENS SINAMICS G110 semiconductor converter (SSG110SC). We use simulation modeling tools in the MATLAB/Simulink environment to look at the semiconductor circuits of a rectifier and an autonomous pulse-width modulation voltage inverter. The study presents analytical expressions describing static and dynamic power losses in power semiconductor diodes and transistors. We used polynomials to get close to the power characteristics of insulated-gate bipolar transistor or IGBTs and then used mathematical expressions to show how they depend on Erec (Ic), Vse (Ic), Vf (If), Eon (Ic), and Eoff (Ic). By utilizing the acquired expressions, a MATLAB/Simulink block was constructed to calculate static and dynamic power losses. as well as power loss dependences on switching frequency and load current, were computed utilizing the developable block system. By comparing the simulation outcomes of the present study to the data provided by the manufacturer, the results were validated. Specific diode and transistor characteristics can be accounted for by the method developed in the present study.
Design and performance analysis of a long-stroke electromagnetic double-reel hammer Alkasassbeh, Jawdat S.; Pavlov, Vlademer Е.; Al-Zyoud, Khalaf Y.; Al-Awneh, Tareq A.; Alkasassbeh, Osamah; Al-Rawashdeh, Ayman Y.
Indonesian Journal of Electrical Engineering and Computer Science Vol 36, No 1: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v36.i1.pp137-152

Abstract

This paper comprehensively investigates the performance characteristics of a long-stroke electromagnetic double-reel hammer compared to a conventional hammer. Quantitative analysis indicates that the long-stroke hammer shows a significant increase in striker speed and impact energy. The impact energy has increased by 255%, and energy losses in copper windings have decreased by 124% per operating cycle. Additionally, the long-stroke hammer demonstrates a 105% reduction in energy consumption and a 52% improvement in overall efficiency per cycle compared to the conventional hammer. This study examines the operational characteristics of the long-stroke hammer throughout its cycle using field theory methods, MATLAB simulations, and experimental tests. Results indicate higher impact energy and speed, lower energy losses in copper windings, and higher efficiency per cycle for the long-stroke hammer. Furthermore, a mathematical model of the long-stroke hammer is developed, incorporating static parameters and oscillograms of striker movement and current flow. A comprehensive comparison of the performance indicators of both hammers reveals significant improvements in lifting height, cycle duration, impact frequency, and striker speed for the long-stroke hammer. Overall, these findings suggest that the long-stroke operating mode can significantly enhance the efficiency and performance of conventional hammers while simultaneously reducing impact frequency and machine heating.
Co-Authors Al-Awneh, Tareq A. Al-Ofeishat, Hussein Ahmad Al-Taweel, Farouq M. Al-Zyoud, Khalaf Y. Alkasassbeh, Jawdat S. Alkasassbeh, Osamah Alzyoud, Khalaf Y. Dovudov, Sarfaroz U. Dunayev, Mikhail Pavlovich Hisham Alrawashdeh Pavlov, Vlademer E. Pavlov, Vlademer Е.