Abstract
This paper studies the dynamic analysis, circuit implementation and circuit synchronization of a class of fractional-order memristor chaotic system based on Chua’s circuit. First, the dynamic characteristics of the system was analyzed with the common chaotic description methods, such as Lyapunov exponent spectrum(LEs), bifurcation diagram, Poincaré diagram, phase trajectory diagram and Complexity spectral entropy (Complexity SE). It can be found that the small change of the initial value can make the dynamic behavior of the system change between the periodic window and the chaotic region. When fractional order q and system parameters are used as a variable, the dynamic behavior of the system can be changed. Second, the system circuit model was modeled and simulated, and then the consistency with the numerical simulation was verified through the implementation of the circuit. Finally, through the design of fractional-order memristor circuit, the circuit synchronization of the system was realized. Therefore, this paper not only studies the dynamic behavior of the system through numerical analysis. Moreover, the effectiveness of the system design is further illustrated by the implementation of analog circuit.
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The authors confirm that the data supporting the findings of this study are available within the article. All the program data included in this manuscript are available upon request by contacting with the corresponding author.
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Acknowledgements
The author acknowledges the referees and the editor for carefully reading this paper and giving many helpful comments. This work is supported by the Natural Science Basic Research Program of Shaanxi (2021JM-533, 2021JQ-880, 2020JM-646, 2022JM-029), the Innovation Capability Support Program of Shaanxi (2018GHJD-21), the Science and Technology Program of Xi’an (2019218414GXRC020CG021-GXYD20.3), the Support Plan for Sanqin Scholars Innovation Team in Shaanxi Province of China, the Scientific Research Program Funded by Shaanxi Provincial Education Department (21JK0960), the Youth Innovation Team of Shaanxi Universities, the Scientific Research Foundation of Xijing University (XJ21B01), and the Scientific Research Foundation of Xijing University (XJ210203, XJ200202). The authors also express their gratitude to the reviewers for their insightful comments.
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Appendix A
Appendix A
The iterative coefficients of the numerical solution of the system are as follows:
\(c_{1}^{1}=ac_{1}^{0}+bc_{2}^{0}-cc_{1}^{0}\left( c_{4}^{0} \right) ^2\)
\(c_{2}^{1}=c_{1}^{0}-c_{2}^{0}+c_{3}^{0}\)
\({c_{3}^{1}=dc_{2}^{0}+ec_{3}^{0}}\)
\({ c_{4}^{1}=c_{1}^{0}}\)
\({c_{1}^{2}=ac_{1}^{1}+bc_{2}^{1}-2cc_{1}^{0}c_{4}^{0}c_{4}^{1}-cc_{1}^{1}\left( c_{4}^{0} \right) ^2}\)
\({ c_{2}^{2}=c_{1}^{1}-c_{2}^{1}+c_{3}^{1}}\)
\({c_{3}^{2}=dc_{2}^{1}+ec_{3}^{1}}\)
\({c_{4}^{2}=c_{1}^{1}}\)
\(\begin{aligned}c_{1}^{3}&=ac_{1}^{2}+bc_{2}^{2}-2cc_{1}^{0}c_{4}^{0}c_{4}^{2}-cc_{1}^{2}\left( c_{4}^{0} \right) ^2 \\ & \quad -\left( cc_{1}^{0}\left( c_{4}^{1} \right) ^2-2cc_{1}^{1}c_{4}^{0}c_{4}^{1} \right) \frac{\Gamma \left( 2q+1 \right) }{\Gamma ^2\left( q+1 \right) }\end{aligned}\)
\({c_{2}^{3}=c_{1}^{2}-c_{2}^{2}+c_{3}^{2}}\)
\({c_{3}^{3}=dc_{2}^{2}+ec_{3}^{2}}\)
\({c_{4}^{3}=c_{1}^{2}}\)
\(\begin{aligned}c_{1}^{4}&=ac_{1}^{3}+bc_{2}^{3}-2cc_{1}^{0}c_{4}^{0}c_{4}^{3}-cc_{1}^{3}\left( c_{4}^{0} \right) ^2 \\ &\quad -\left( 2cc_{1}^{0}c_{4}^{1}c_{4}^{2}+2cc_{1}^{1}c_{4}^{0}c_{4}^{2}+2cc_{1}^{2}c_{4}^{0}c_{4}^{1} \right) \\ &\quad \frac{\Gamma \left( 3q+1 \right) }{\Gamma \left( q+1 \right) \Gamma \left( 2q+1 \right) }\end{aligned}\)
\({-cc_{1}^{1}c_{4}^{1}c_{4}^{1}\frac{\Gamma \left( 3q+1 \right) }{\Gamma ^3\left( q+1 \right) }}\)
\({c_{2}^{4}=c_{1}^{3}-c_{2}^{3}+c_{3}^{3}}\)
\({c_{3}^{4}=dc_{2}^{3}+ec_{3}^{3}}\)
\({c_{4}^{4}=c_{1}^{3}}\)
\(\begin{aligned}c_{1}^{5}&=ac_{1}^{4}+bc_{2}^{4}-2cc_{1}^{0}c_{4}^{0}c_{4}^{4}-cc_{1}^{4}\left( c_{4}^{0} \right) ^2 \\ &\quad -\left( 2cc_{1}^{0}c_{4}^{1}c_{4}^{3}+2cc_{1}^{1}c_{4}^{0}c_{4}^{3}+2cc_{1}^{3}c_{4}^{0}c_{4}^{1} \right) \\ &\quad \frac{\Gamma \left( 4q+1 \right) }{\Gamma \left( q+1 \right) \Gamma \left( 3q+1 \right) }\end{aligned}\)
\(\begin{aligned}&\quad -\left( cc_{1}^{0}c_{4}^{2}c_{4}^{2}+2cc_{1}^{0}c_{4}^{2}c_{4}^{2} \right) \frac{\Gamma \left( 4q+1 \right) }{\Gamma ^2\left( 2q+1 \right) } \\ &\quad -\left( 2cc_{1}^{1}c_{4}^{1}c_{4}^{2}+2cc_{1}^{2}c_{4}^{1}c_{4}^{1} \right) \frac{\Gamma \left( 4q+1 \right) }{\Gamma \left( 2q+1 \right) \Gamma \left( 2q+1 \right) }\end{aligned}\)
\({c_{2}^{5}=c_{1}^{4}-c_{2}^{4}+c_{3}^{4}}\)
\({c_{3}^{5}=dc_{2}^{4}+ec_{3}^{4}}\)
\({c_{4}^{5}=c_{1}^{4}}\)
\(\begin{aligned}c_{1}^{6}&=ac_{1}^{5}+bc_{2}^{5}-2cc_{1}^{0}c_{4}^{0}c_{4}^{5}-cc_{1}^{5}\left( c_{4}^{0} \right) ^2 \\ &\quad -\left( 2cc_{1}^{0}c_{4}^{1}c_{4}^{4}+2cc_{1}^{1}c_{4}^{0}c_{4}^{4}+2cc_{1}^{4}c_{4}^{0}c_{4}^{1} \right)\\ &\quad \frac{\Gamma \left( 5q+1 \right) }{\Gamma \left( q+1 \right) \Gamma \left( 4q+1 \right) }-\end{aligned}\)
\(\begin{aligned} &\quad \left( 2cc_{1}^{0}c_{4}^{2}c_{4}^{3}+2cc_{1}^{2}c_{4}^{0}c_{4}^{3}+2cc_{1}^{3}c_{4}^{0}c_{4}^{2} \right) \\ &\quad \frac{\Gamma \left( 5q+1 \right) }{\Gamma \left( 3q+1 \right) \Gamma \left( 2q+1 \right) } \\ &\quad -\left( 2cc_{1}^{1}c_{4}^{1}c_{4}^{3}+cc_{1}^{3}c_{4}^{1}c_{4}^{1} \right) \end{aligned}\)
\({-\left( 2cc_{1}^{2}c_{4}^{1}c_{4}^{2}+cc_{1}^{1}c_{4}^{2}c_{4}^{2} \right) \frac{\Gamma \left( 5q+1 \right) }{\Gamma \left( q+1 \right) \Gamma ^2\left( 2q+1 \right) }}\)
\({ c_{2}^{6}=c_{1}^{5}-c_{2}^{5}+c_{3}^{5}}\)
\({c_{3}^{6}=dc_{2}^{5}+ec_{3}^{5}}\)
\({c_{4}^{6}=c_{1}^{5}}\)
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Liu, J., Wang, Z., Chen, M. et al. Chaotic system dynamics analysis and synchronization circuit realization of fractional-order memristor. Eur. Phys. J. Spec. Top. 231, 3095–3107 (2022). https://doi.org/10.1140/epjs/s11734-022-00640-4
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DOI: https://doi.org/10.1140/epjs/s11734-022-00640-4