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Realization of a digital chaotic oscillator by using a low cost microcontroller

Ercan Köse ; Mersin University
Aydın Mühürcü ; Sakarya University

Puni tekst: engleski PDF 1.790 Kb

str. 341-348

preuzimanja: 597



This study addresses the in-detail steps to create a chaotic oscillator having continuous-time equations using a microcontroller hardware which has a lower clock-frequency and narrower data bus, as well as much lower hardware, software and algorithm development costs compared to chaotic oscillators developed using analog circuit components or a hardware-based software platform such as FPGA. For this purpose, a Lorenz chaotic oscillator with continuous-time nonlinear equations was selected. Lorenz t-domain equations were transformed into S-domain and Z-domain respectively. After these transformations, a detailed flowchart was given to illustrate the steps required to implement the chaotic oscillator in the microcontroller. All the details derived were simulated by running simultaneous MATLAB-SIMULINK simulations. And, the performance of the discrete-time chaotic oscillator executed in the PIC18F452 microcontroller produced by the Microchip Technology Inc. was visualized by 1D and 2D graphs on an oscilloscope screen.

Ključne riječi

microcontroller, FPGA, chaotic oscillator, discrete-time, s and z-transform, algorithm

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Posjeta: 778 *