[ATOMOSYD] 1980 the Shimizu-Morioka System

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9/2/2015 [ATOMOSYD] 1980 The ShimizuMorioka system http://www.atomosyd.net/spip.php?article75 1/2 ACCUEIL ·> Some dynamical systems ·> 3D flows ·> Lorenzlike systems ACCUEIL A research group Algorithms Collaborators Experimental data News Scientific Mediations Some dynamical systems Qui Fait Quoi Rechercher Autres Articles de : Lorenzlike systems 1958 A simple model for (...) 1981 A possible model for (...) 1981 Rigid bodymotion (...) 1988 : A chaotic model of (...) 1990 A model for a simple (...) 1992 A model for weakly (...) 1992 A thermal convection (...) 1999 The "ChenUeta" system Christophe LETELLIER 20/05/2009 1980 THE SHIMIZUMORIOKA SYSTEM T. Shimizu & N. Morioka A system algebraically simpler than the Lorenz system has been proposed by Shimizu & Morioka [1]. The system The set of three ordinary differential equations known as the "Shimizu & Morioka" system reads as : This system has one fixed point, , located at the origin of the phase space and two fixed points located at . For a wide range of parameter values, including those corresponding to a chaotic attractor, is a saddle and are two saddlefoci. This system produces a ``Lorenzlike’’ chaotic attractor with parameter values and (Fig. 1). Fig. 1 : Lorenzlike chaotic attractor solution to the Shimizu Morioka system Replacing the with 0.191450 changes the attractor for a ``Burke and Shawlike’’ attractor (Fig. 2). Fig. 2 : BurkeShawlike attractor solution to the Shimizu Morioka system.

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ACCUEIL ·>  Some dynamical systems ·>  3D flows ·>  Lorenz­like systems

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Autres Articles de : Lorenz­like systems1958 A simple model for (...)1981 A possible model for (...)1981 Rigid body­motion (...)1988 : A chaotic model of (...)1990 A model for a simple (...)1992 A model for weakly (...)1992 A thermal convection (...)1999 The "Chen­Ueta" system

Christophe LETELLIER20/05/2009

1980 THE SHIMIZU­MORIOKA SYSTEMT. Shimizu & N. Morioka

A system algebraically simpler than the Lorenz system has been proposed by Shimizu& Morioka [1].

 The system

The  set  of  three  ordinary  differential  equations  known as  the  "Shimizu & Morioka"system reads as : 

 

This system has one fixed point,  , located at the origin of the phase space and two

fixed  points   located  at  .  For  a  wide  range  of  parameter  values,

including those corresponding to a chaotic attractor,   is a saddle and   are two

saddle­foci. This  system produces a ``Lorenz­like’’  chaotic attractor with parameter

values   and   (Fig. 1).

Fig. 1 : Lorenz­like chaotic attractor solution to the Shimizu­Morioka system

Replacing the   with 0.191450 changes the attractor for a ``Burke and Shaw­like’’attractor (Fig. 2).

Fig. 2 : Burke­Shaw­like attractor solution to the Shimizu­Morioka system.

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[1] T. Shimizu & N. Moroika, On the bifurcation of a symmetric limit cycle to an asymmetricone in a simple model, Physics Letters A, 76, 201­204, 1980.

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