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Image of Vibration Testing and System Dynamics
ISSN: 2475-4811 (print)
ISSN: 2475-482X (online)
Journal of Vibration Testing and System Dynamics

C. Steve Suh (editor), Pawel Olejnik (editor),

Xianguo Tuo (editor)

Pawel Olejnik (editor)

Lodz University of Technology, Poland

Email: pawel.olejnik@p.lodz.pl

C. Steve Suh (editor)

Texas A&M University, USA

Email: ssuh@tamu.edu

Xiangguo Tuo (editor)

Sichuan University of Science and Engineering, China

Email: tuoxianguo@suse.edu.cn

Piecewise Josephson Junction Oscillator: Dynamical Analysis, Microcontroller Execution, Random Number Generation, and Chaos Suppression Via Genetic Algorithms

Journal of Vibration Testing and System Dynamics 10(4) (2026) 339--351 | DOI:10.5890/JVTSD.2026.12.003

Petros Awilo$^{1}$, Isidore Komofor Ngongiah$^{2}$, Rolande Tsapla Fotsa$^{3}$, Victor Kamdoum Tamba$^{4}$, Sifeu Takougang Kingni$^{2}$

$^{1}$ Department of Physics, Faculty of Science, University of Maroua, P.O. Box 814 Maroua, Cameroon

$^{2}$ Department of Mechanical, Petroleum and Gas Engineering, National Advanced School of Mines and Petroleum Industries, University of Maroua, P.O. Box 46, Maroua, Cameroon

$^{3}$ Department of Mechanical Engineering, College of Technology, University of Buea, P.O. BOX 63 Buea, Cameroon

$^{4}$ Research unit of Condensed matter of electronics and signal processing. Department of Physics, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon

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Abstract

This paper investigates the microcontroller execution, random number generator (RNG), and chaos suppression via genetic algorithms (GAs) in the piecewise resistive capacitive inductive shunted Josephson junction (JJ) oscillator (PRCLSJJO). Limit cycle, period-2 oscillations, periodic bursting characteristics, and six different shapes of chaotic characteristics are revealed in the PRCLSJJO. These dynamical characteristics obtained during the numerical simulations are validated by the microcontroller execution of the PRCLSJJO. The randomness of the generated binary data is extensively tested using the National Institute of Standards and Technology (NIST) SP 800-22 test suite, confirming the suitability of PRCLSJJO-based Random Number Generator (RNG) for applications such as secure communication schemes and other chaos-based applications. Chaos suppression in PRCLSJJO through GAs is demonstrated by optimizing some parameters of PRCLSJJO via the GAs. The chaotic characteristics encountered in PRCLSJJO can be converged to the desired state.

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