Analysis and electronic circuit implementation of an integer-and fractional-order Shimizu-Morioka system


  • François Kapche Tagne University of Dschang
  • Guillaume Honoré KOM University of Dschang
  • Marceline Motchongom Tingue The University of Bamenda
  • Pierre Kisito Talla University of Dschang
  • V. Kamdoum Tamba University of Dschang



Shimizu-Morioka system, fractional-order derivative, bistable attractors, metastable chaos, spiking oscillations, electronic circuit implementation


The dynamics of an integer-order and fractional-order Lorenz like system called Shimizu-Morioka system is investigated in this paper. It is shown thatinteger-order Shimizu-Morioka system displays bistable chaotic attractors, monostable chaotic attractors and coexistence between bistable and monostable chaotic attractors. For suitable choose of parameters, the fractional-order Shimizu-Morioka system exhibits bistable chaotic attractors, monostable chaotic attractors, metastable chaos (i.e. transient chaos) and spiking oscillations. The bifurcation structures reveal that the fractional-order derivative affects considerably the dynamics of Shimizu-Morioka system. The chain fractance circuit is used to designand implement the integer- and fractional-order Shimizu-Morioka system in Pspice. A close agreement is observed between PSpice based circuit simulations and numerical simulations analysis. The results obtained in this work were not reported previously in the interger as well as in fractional-order Shimizu-Morioka system and thus represent an important contribution which may help us in better understanding of the dynamical behavior of this class of systems.


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