CN105119713A - Adaptive synchronization method and circuit for memristor-based Lorenz hyperchaotic system - Google Patents

Abstract

The invention relates to chaotic system synchronization and a circuit, and especially relates to an adaptive synchronization method and circuit for a memristor-based Lorenz hyperchaotic system. As a newfound physical component in Hewlett-Packard Laboratories of 2008, the memristor can replace a Chua's diode in a Chua's circuit to form the chaotic system, and can also be added to three-dimensional chaotic systems as a component, such as a Lorenz system, a Chen system and a Lorenz system to form a hyperchaotic system; at present, the method and circuit of forming chaos or hyperchaos by taking the memristor as a component have been proposed, but a synchronization method for forming the hyperchaotic system by taking the memristor as a component has not been proposed yet and this is the disadvantage of the prior art; the invention provides a Lorenz hyperchaotic system by using the memristor, and the adaptive synchronization method of the chaotic system is provided on this basis.

Description

A kind of adaptive synchronicity method of the Lorenz hyperchaotic system based on memristor and circuit

Technical field

The present invention relates to a Synchronization of Chaotic Systems and circuit, particularly a kind of adaptive synchronicity method of the Lorenz hyperchaotic system based on memristor and circuit.

Background technology

Memristor was as the newfound physical component in HP Lab in 2008, the Cai Shi diode in cai's circuit can be replaced to form chaos system, also three-dimensional chaotic system can be increased to as Lorenz system as element, in Chen system and Lorenz system, form hyperchaotic system, at present, memristor as element formed chaos or hyperchaos Method and circuits oneself be suggested, but the synchronous method utilizing memristor to form hyperchaotic system as an element does not still propose, this is the deficiencies in the prior art parts, the present invention utilizes memristor to propose a Lorenz hyperchaotic system, and propose the adaptive synchronicity method of this chaos system on this basis.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of adaptive synchronicity method and circuit of the Lorenz hyperchaotic system based on memristor, and the present invention adopts following technological means to realize goal of the invention:

1., based on an adaptive synchronicity method for the Lorenz hyperchaotic system of memristor, it is characterized in that, comprise the following steps:

(1) Lorenz chaos system i is:

$\left\{\begin{array}{c}dx/dt=a(y-x)\\ dy/dt=bx-y+xz\\ dz/dt=xy-cz\end{array}\right.,a=10,b=28,c=10/3---i$

In formula, x, y, z are state variable;

(2) the memristor model that the present invention adopts is ii:

Wherein represent that magnetic control recalls resistance, represent magnetic flux, m, n be greater than zero parameter;

(3) obtaining iii to the memristor differentiate of ii is:

represent and recall and lead, m, n be greater than zero parameter;

(4) using memristor model iii as unidimensional system variable, be added on second equation of three-dimensional chaotic system i, obtain a kind of Lorenz hyperchaotic system iv with memristor:

$\{\begin{array}{c}dx/dt=a(y-x)\\ dy/dt=bx-y+xz-kxW\left(u\right)\\ dz/dt=xy-cz\\ du/dt=-x\end{array}---iv$

In formula, x, y, z, u are state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006;

(5) with described in iv based on the Lorenz hyperchaotic system of memristor for drive system v:

$\{\begin{array}{c}{\mathrm{dx}}_1/dt=a(y_1-x_1)\\ {\mathrm{dy}}_1/dt={\mathrm{bx}}_1-y_1+x_1{z}_1-{\mathrm{kx}}_{1}W\left(u_1\right)\\ {\mathrm{dz}}_1/dt=x_1{y}_1-{\mathrm{cz}}_1\\ {\mathrm{du}}_1/dt=-x_1\end{array}---v$

X in formula ₁, y ₁, z ₁, u ₁for state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(6) with described in iv based on the Lorenz hyperchaotic system of memristor for responding system vi:

$\left\{\begin{array}{c}{\mathrm{dx}}_2/dt=a(y_2-x_2)+v_1\\ {\mathrm{dy}}_2/dt={\mathrm{bx}}_2-y_2+x_2{z}_2-{\mathrm{kx}}_{2}W\left(u_2\right)+v_2\\ {\mathrm{dz}}_2/dt=x_2{y}_2-{\mathrm{cz}}_2+v_3\\ {\mathrm{du}}_2/dt=-x_2+v_4\end{array}\right.---vi$

X in formula ₂, y ₂, z ₂, u ₂for state variable, v ₁, v ₂, v ₃, v ₄for controller, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(7) error system e is defined ₁=(x ₂-x ₁), e ₂=(z ₂-z ₁), when controller get be worth as follows time, drive chaos system v and response chaos system vi to realize synchronous;

$\left\{\begin{array}{c}{v}_1=-e_1\∫e_1^{2}dt\\ v_2=0\\ v_3=-e_2\∫e_2^{2}dt\\ v_4=0\end{array}\right.---vii$

By the Chaotic Synchronous circuit driving chaos system v and response chaos system vi to form be:

$\left\{\begin{array}{c}{\mathrm{dx}}_1/dt=a(y_1-x_1)\\ {\mathrm{dy}}_1/dt={\mathrm{bx}}_1-y_1+x_1{z}_1-{\mathrm{kx}}_{1}W\left(u_1\right)\\ {\mathrm{dz}}_1/dt=x_1{y}_1-{\mathrm{cz}}_1\\ {\mathrm{du}}_1/dt=-x_1\\ {\mathrm{dx}}_2/dt=a(y_2-x_2)-(x_2-x_1)\∫{(x_2-x_1)}^{2}dt\\ {\mathrm{dy}}_2/dt={\mathrm{bx}}_2-y_2+x_2{z}_2-{\mathrm{kx}}_{2}W\left(u_2\right)\\ {\mathrm{dz}}_2/dt=x_2{y}_2-{\mathrm{cz}}_2-(z_2-z_1)\∫{(z_2-z_1)}^{2}dt\\ {\mathrm{du}}_2/dt=-x_2\end{array}\right.---ix$

2. the adaptive synchronicity circuit based on the Lorenz hyperchaotic system of memristor, it is characterized in that: the adaptive synchronicity of a kind of Lorenz hyperchaotic system based on memristor of described circuit is made up of drive system and responding system, drive system comprises Lorenz system I circuit and memristor I circuit, responding system comprises controller 1 circuit, controller electricity 2 tunnels, Lorenz system II circuit and memristor II circuit, and driving system circuit drives responding system circuit by signal;

Lorenz system I circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A2) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A2), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A3) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A3),

Memristor I circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system I circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system I circuit by 2 multipliers;

Lorenz system II circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A4) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A4), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A5) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A5),

Memristor II circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system II circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system II circuit by 2 multipliers;

Controller 1 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end of the Lorenz system I circuit first via and the reversed-phase output of the Lorenz system II circuit first via, and multiplier (A9) exports the anti-phase adder input connecing the Lorenz system II circuit first via;

Controller 2 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end on Lorenz system I circuit the 3rd tunnel and the reversed-phase output on Lorenz system II circuit the 3rd tunnel, and multiplier (A10) exports the anti-phase adder input connecing Lorenz system II circuit the 3rd tunnel.

Beneficial effect: the present invention is on the basis of three-dimensional chaotic system, and the present invention utilizes memristor to propose a kind of Lorenz hyperchaotic system, and proposes the adaptive synchronicity method of this chaos system on this basis.

Accompanying drawing explanation

Fig. 1 is the electrical block diagram of the preferred embodiment of the present invention.

Fig. 2 is Lorenz system I circuit diagram in the present invention.

Fig. 3 is the circuit diagram of memristor I in the present invention.

Fig. 4 is Lorenz system II circuit diagram in the present invention.

Fig. 5 is the circuit diagram of memristor II in the present invention.

Fig. 6 is the circuit diagram of middle controller 1 of the present invention.

Fig. 7 is the circuit diagram of middle controller 2 of the present invention.

Fig. 8 is the synchronous circuit design sketch of x1 and x2 in the present invention.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, the present invention is further described in detail, see Fig. 1-Fig. 8.

1., based on an adaptive synchronicity method for the Lorenz hyperchaotic system of memristor, it is characterized in that, comprise the following steps:

(1) Lorenz chaos system i is:

$\left\{\begin{array}{c}dx/dt=a(y-x)\\ dy/dt=bx-y+xz\\ dz/dt=xy-cz\end{array}\right.,a=10,b=28,c=10/3---i$

In formula, x, y, z are state variable;

(2) the memristor model that the present invention adopts is ii:

Wherein represent that magnetic control recalls resistance, represent magnetic flux, m, n be greater than zero parameter;

(3) obtaining iii to the memristor differentiate of ii is:

represent and recall and lead, m, n be greater than zero parameter;

(4) using memristor model iii as unidimensional system variable, be added on second equation of three-dimensional chaotic system i, obtain a kind of Lorenz hyperchaotic system iv with memristor:

$\{\begin{array}{c}dx/dt=a(y-x)\\ dy/dt=bx-y+xz-kxW\left(u\right)\\ dz/dt=xy-cz\\ du/dt=-x\end{array}---iv$

In formula, x, y, z, u are state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006;

(5) with described in iv based on the Lorenz hyperchaotic system of memristor for drive system v:

$\{\begin{array}{c}{\mathrm{dx}}_1/dt=a(y_1-x_1)\\ {\mathrm{dy}}_1/dt={\mathrm{bx}}_1-y_1+x_1{z}_1-{\mathrm{kx}}_{1}W\left(u_1\right)\\ {\mathrm{dz}}_1/dt=x_1{y}_1-{\mathrm{cz}}_1\\ {\mathrm{du}}_1/dt=-x_1\end{array}---v$

X in formula ₁, y ₁, z ₁, u ₁for state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(6) with described in iv based on the Lorenz hyperchaotic system of memristor for responding system vi:

$\left\{\begin{array}{c}{\mathrm{dx}}_2/dt=a(y_2-x_2)+v_1\\ {\mathrm{dy}}_2/dt={\mathrm{bx}}_2-y_2+x_2{z}_2-{\mathrm{kx}}_{2}W\left(u_2\right)+v_2\\ {\mathrm{dz}}_2/dt=x_2{y}_2-{\mathrm{cz}}_2+v_3\\ {\mathrm{du}}_2/dt=-x_2+v_4\end{array}\right.---vi$

X in formula ₂, y ₂, z ₂, u ₂for state variable, v ₁, v ₂, v ₃, v ₄for controller, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(7) error system e is defined ₁=(x ₂-x ₁), e ₂=(z ₂-z ₁), when controller get be worth as follows time, drive chaos system v and response chaos system vi to realize synchronous;

$\left\{\begin{array}{c}{v}_1=-e_1\∫e_1^{2}dt\\ v_2=0\\ v_3=-e_2\∫e_2^{2}dt\\ v_4=0\end{array}\right.---vii$

By the Chaotic Synchronous circuit driving chaos system v and response chaos system vi to form be:

$\left\{\begin{array}{c}{\mathrm{dx}}_1/dt=a(y_1-x_1)\\ {\mathrm{dy}}_1/dt={\mathrm{bx}}_1-y_1+x_1{z}_1-{\mathrm{kx}}_{1}W\left(u_1\right)\\ {\mathrm{dz}}_1/dt=x_1{y}_1-{\mathrm{cz}}_1\\ {\mathrm{du}}_1/dt=-x_1\\ {\mathrm{dx}}_2/dt=a(y_2-x_2)-(x_2-x_1)\∫{(x_2-x_1)}^{2}dt\\ {\mathrm{dy}}_2/dt={\mathrm{bx}}_2-y_2+x_2{z}_2-{\mathrm{kx}}_{2}W\left(u_2\right)\\ {\mathrm{dz}}_2/dt=x_2{y}_2-{\mathrm{cz}}_2-(z_2-z_1)\∫{(z_2-z_1)}^{2}dt\\ {\mathrm{du}}_2/dt=-x_2\end{array}\right.---ix$

2. the adaptive synchronicity circuit based on the Lorenz hyperchaotic system of memristor, it is characterized in that: the adaptive synchronicity of a kind of Lorenz hyperchaotic system based on memristor of described circuit is made up of drive system and responding system, drive system comprises Lorenz system I circuit and memristor I circuit, responding system comprises controller 1 circuit, controller electricity 2 tunnels, Lorenz system II circuit and memristor II circuit, and driving system circuit drives responding system circuit by signal;

Lorenz system I circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A2) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A2), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A3) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A3),

Memristor I circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system I circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system I circuit by 2 multipliers;

Lorenz system II circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A4) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A4), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A5) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A5),

Memristor II circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system II circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system II circuit by 2 multipliers;

Controller 1 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end of the Lorenz system I circuit first via and the reversed-phase output of the Lorenz system II circuit first via, and multiplier (A9) exports the anti-phase adder input connecing the Lorenz system II circuit first via;

Controller 2 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end on Lorenz system I circuit the 3rd tunnel and the reversed-phase output on Lorenz system II circuit the 3rd tunnel, and multiplier (A10) exports the anti-phase adder input connecing Lorenz system II circuit the 3rd tunnel.

Certainly, above-mentioned explanation is not to the restriction of invention, and the present invention is also not limited only to above-mentioned citing, and the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also belong to protection scope of the present invention.

Claims (2)

1., based on an adaptive synchronicity method for the Lorenz hyperchaotic system of memristor, it is characterized in that, comprise the following steps:

(1) Lorenz chaos system i is:

In formula, x, y, z are state variable;

(2) the memristor model that the present invention adopts is ii:

Wherein represent that magnetic control recalls resistance, represent magnetic flux, m, n be greater than zero parameter;

(3) obtaining iii to the memristor differentiate of ii is:

represent and recall and lead, m, n be greater than zero parameter;

(4) using memristor model iii as unidimensional system variable, be added on second equation of three-dimensional chaotic system i, obtain a kind of Lorenz hyperchaotic system iv with memristor:

In formula, x, y, z, u are state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006;

(5) with described in iv based on the Lorenz hyperchaotic system of memristor for drive system v:

X in formula ₁, y ₁, z ₁, u ₁for state variable, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(6) with described in iv based on the Lorenz hyperchaotic system of memristor for responding system vi:

X in formula ₂, y ₂, z ₂, u ₂for state variable, v ₁, v ₂, v ₃, v ₄for controller, parameter value a=10, b=28, c=10/3, k=1, m=8, n=0.006

(7) error system e is defined ₁=(x ₂-x ₁), e ₂=(z ₂-z ₁), when controller get be worth as follows time, drive chaos system v and response chaos system vi to realize synchronous;

By the Chaotic Synchronous circuit driving chaos system v and response chaos system vi to form be:

。

2. the adaptive synchronicity circuit based on the Lorenz hyperchaotic system of memristor, it is characterized in that: the adaptive synchronicity of a kind of Lorenz hyperchaotic system based on memristor of described circuit is made up of drive system and responding system, drive system comprises Lorenz system I circuit and memristor I circuit, responding system comprises controller 1 circuit, controller electricity 2 tunnels, Lorenz system II circuit and memristor II circuit, and driving system circuit drives responding system circuit by signal;

Lorenz system I circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A2) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A2), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A3) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A3),

Memristor I circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system I circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system I circuit by 2 multipliers;

Lorenz system II circuit is by integrated operational amplifier (LF347N) and resistance, the three anti-phase adders in tunnel that electric capacity is formed, inverting integrator and inverter and multiplier composition, the anti-phase anti-phase output of the adder input termination first via of the first via and the homophase on the second tunnel export, the anti-phase adder input on the second tunnel connects the in-phase output end of the first via, connect the reversed-phase output on the second tunnel, the input of multiplier (A4) connects the anti-phase output of the first via and the homophase output on the 3rd tunnel respectively, the input of the anti-phase adder in output termination second tunnel of multiplier (A4), the anti-phase input on the 3rd tunnel connects the in-phase output end on the 3rd tunnel, the input of multiplier (A5) connects the in-phase input end of the first via and the inverting input on the second tunnel respectively, the anti-phase adder input on output termination the 3rd tunnel of multiplier (A5),

Memristor II circuit is made up of integrated operational amplifier (LF353N) and 2 multipliers (AD633JN), integrated operational amplifier (LF353N) and resistance, electric capacity form inverting integrator, the first via homophase of input termination Lorenz system II circuit exports, and output connects the input of the second anti-phase adder in tunnel of Lorenz system II circuit by 2 multipliers;

Controller 1 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end of the Lorenz system I circuit first via and the reversed-phase output of the Lorenz system II circuit first via, and multiplier (A9) exports the anti-phase adder input connecing the Lorenz system II circuit first via;

Controller 2 circuit is made up of anti-phase adder, multiplier, inverter and inverting integrator, anti-phase adder input connects the in-phase output end on Lorenz system I circuit the 3rd tunnel and the reversed-phase output on Lorenz system II circuit the 3rd tunnel, and multiplier (A10) exports the anti-phase adder input connecing Lorenz system II circuit the 3rd tunnel.