2 research outputs found
ΠΠ΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎ-Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΏΠΎΠ΄Ρ ΠΎΠ΄ Π² Π°Π½Π°Π»ΠΈΠ·Π΅ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΌΠ΅ΠΌΡΠΈΡΡΠΎΡΠ°
A general set of ideas related to the memristors modeling is presented. The memristor is considered to be a partially ordered physical and chemical system that is within the βedge of chaosβ from the point of view of nonlinear dynamics. The logical and historical relationship of memristor physics, nonlinear dynamics, and neuromorphic systems is illustrated in the form of a scheme. We distinguish the nonlinearity into external ones, when we describe the behavior of an electrical circuit containing a memristor, and internal ones, which are caused by processes in filament region. As a simulation model, the attention is drawn to the connectionist approach, known in the theory of neural networks, but applicable to describe the evolution of the filament as the dynamics of a network of traps connected electrically and quantum-mechanically. The state of each trap is discrete, and it is called an βoscillatorβ. The applied meaning of the theory of coupled maps lattice is indicated. The high-density current through the filament can lead to the need to take into account both discrete processes (generation of traps) and continuous processes (inclusion of some constructions of solid body theory into the model).However, a compact model is further developed in which the state of such a network is aggregated to three phase variables: the length of the filament, its total charge, and the local temperature. Despite the apparent physical meaning, all variables have a formal character, which is usually inherent in the parameters of compact models. The model consists of one algebraic equation, two differential equations, and one integral connection equation, and is derived from the simplest Strukovβs model. Therefore, it uses the βwindow functionβ approach. It is indicated that, according to the PoincareβBendixon theorem, this is sufficient to explain the instability of four key parameters (switching voltages and resistances ON/OFF) at a cycling of memristor. The Fourier spectra of the time series of these parameters are analyzed on a low sample of experimental data. The data are associated with the TiN/HfOx/Pt structure (0 < x < 2). A preliminary conclusion that requires further verification is the predominance of low frequencies and the stochasticity of occurrence ones.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΠΎΠ±ΡΠΈΠΉ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΠΈΠ΄Π΅ΠΉ, ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΠΌΡΠΈΡΡΠΎΡΠΎΠ². ΠΠ΅ΠΌΡΠΈΡΡΠΎΡ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΊΠ°ΠΊ ΡΠ°ΡΡΠΈΡΠ½ΠΎ ΡΠΏΠΎΡΡΠ΄ΠΎΡΠ΅Π½Π½Π°Ρ ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠ°Ρ ΡΠΈΡΡΠ΅ΠΌΠ°, Π½Π°Ρ
ΠΎΠ΄ΡΡΠ°ΡΡΡ, ΡΠΎΠ³Π»Π°ΡΠ½ΠΎ Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ, Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
Β«ΠΊΡΠ°Ρ Ρ
Π°ΠΎΡΠ°Β». ΠΠΎΠ³ΠΈΠΊΠΎ-ΠΈΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠ°Ρ Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Ρ ΡΠΈΠ·ΠΈΠΊΠΈ ΠΌΠ΅ΠΌΡΠΈΡΡΠΎΡΠΎΠ², Π½Π΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΠΈ Π½Π΅ΠΉΡΠΎΠΌΠΎΡΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΈΠ»Π»ΡΡΡΡΠΈΡΡΠ΅ΡΡΡ Π² Π²ΠΈΠ΄Π΅ ΡΡ
Π΅ΠΌΡ. ΠΠ΅Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΡΡΡ ΡΠ°Π·Π΄Π΅Π»Π΅Π½Π° Π½Π°ΠΌΠΈ Π½Π° Π²Π½Π΅ΡΠ½ΡΡ, ΠΊΠΎΠ³Π΄Π° ΠΎΠΏΠΈΡΡΠ²Π°Π΅ΡΡΡ ΠΏΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΠΏΠΈ, ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠ΅ΠΉ ΠΌΠ΅ΠΌΡΠΈΡΡΠΎΡ, ΠΈ Π²Π½ΡΡΡΠ΅Π½Π½ΡΡ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΡΡ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ Π² ΠΎΠ±ΡΠ΅ΠΌΠ΅ ΡΠΈΠ»Π°ΠΌΠ΅Π½ΡΠ°. Π ΡΠ°ΠΌΠΊΠ°Ρ
ΠΈΠΌΠΈΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ±ΡΠ°ΡΠ°Π΅ΡΡΡ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ Π½Π° ΠΊΠΎΠ½Π½Π΅ΠΊΡΠΈΠΎΠ½ΠΈΡΡΡΠΊΠΈΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄, ΠΈΠ·Π²Π΅ΡΡΠ½ΡΠΉ Π² ΡΠ΅ΠΎΡΠΈΠΈ Π½Π΅ΠΉΡΠΎΠ½Π½ΡΡ
ΡΠ΅ΡΠ΅ΠΉ, Π½ΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΠΈΠΌΡΠΉ Π΄Π»Ρ ΠΎΠΏΠΈΡΠ°Π½ΠΈΡ ΡΠ²ΠΎΠ»ΡΡΠΈΠΈ ΡΠΈΠ»Π°ΠΌΠ΅Π½ΡΠ° ΠΊΠ°ΠΊ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΡΠ΅ΡΠΈ Π»ΠΎΠ²ΡΡΠ΅ΠΊ, ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
ΡΠ»Π΅ΠΊΡΡΠΈΡΠ΅ΡΠΊΠΈ ΠΈ ΠΊΠ²Π°Π½ΡΠΎΠ²ΠΎ-ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈ. Π‘ΠΎΡΡΠΎΡΠ½ΠΈΠ΅ ΠΊΠ°ΠΆΠ΄ΠΎΠΉ Π»ΠΎΠ²ΡΡΠΊΠΈ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΠΎ, Π° ΡΠ°ΠΌΠ° ΠΎΠ½Π° Π½Π°Π·ΡΠ²Π°Π΅ΡΡΡ Β«ΠΎΡΡΠΈΠ»Π»ΡΡΠΎΡΒ». Π£ΠΊΠ°Π·ΡΠ²Π°Π΅ΡΡΡ Π½Π° ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΡΠ΅ΠΎΡΠΈΠΈ ΡΠ΅ΡΠ΅ΡΠΎΠΊ ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
ΠΎΡΡΠΈΠ»Π»ΡΡΠΎΡΠΎΠ². ΠΡΠΎΡΠ΅ΠΊΠ°Π½ΠΈΠ΅ ΡΠ΅ΡΠ΅Π· ΡΠΈΠ»Π°ΠΌΠ΅Π½Ρ ΡΠΎΠΊΠ° Π±ΠΎΠ»ΡΡΠΎΠΉ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΠΌΠΎΠΆΠ΅Ρ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡΡ ΠΊ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΡΡΠ΅ΡΠ° ΠΈ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² (Π³Π΅Π½Π΅ΡΠ°ΡΠΈΡ Π»ΠΎΠ²ΡΡΠ΅ΠΊ), ΠΈ Π½Π΅ΠΏΡΠ΅ΡΡΠ²Π½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² (Π²Π²Π΅Π΄Π΅Π½ΠΈΠ΅ Π² ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² Π·ΠΎΠ½Π½ΠΎΠΉ ΡΠ΅ΠΎΡΠΈΠΈ ΡΠ²Π΅ΡΠ΄ΠΎΠ³ΠΎ ΡΠ΅Π»Π°).ΠΠ΄Π½Π°ΠΊΠΎ Π΄Π°Π»Π΅Π΅ ΡΠ°Π·Π²ΠΈΠ²Π°Π΅ΡΡΡ ΠΊΠΎΠΌΠΏΠ°ΠΊΡΠ½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ, Π² ΠΊΠΎΡΠΎΡΠΎΠΉ ΡΠΎΡΡΠΎΡΠ½ΠΈΠ΅ ΡΠ°ΠΊΠΎΠΉ ΡΠ΅ΡΠΈ Π°Π³ΡΠ΅Π³ΠΈΡΠΎΠ²Π°Π½ΠΎ Π΄ΠΎ ΡΡΠ΅Ρ
ΡΠ°Π·ΠΎΠ²ΡΡ
ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
: Π΄Π»ΠΈΠ½Π° ΡΠΈΠ»Π°ΠΌΠ΅Π½ΡΠ°, Π΅Π³ΠΎ ΡΡΠΌΠΌΠ°ΡΠ½ΡΠΉ Π·Π°ΡΡΠ΄ ΠΈ Π»ΠΎΠΊΠ°Π»ΡΠ½Π°Ρ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ°. ΠΠ΅ΡΠΌΠΎΡΡΡ Π½Π° ΠΊΠ°ΠΆΡΡΠΈΠΉΡΡ ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΌΡΡΠ», Π²ΡΠ΅ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΈΠΌΠ΅ΡΡ ΡΠΎΡΠΌΠ°Π»ΡΠ½ΡΠΉ Ρ
Π°ΡΠ°ΠΊΡΠ΅Ρ, ΠΏΡΠΈΡΡΡΠΈΠΉ ΠΎΠ±ΡΡΠ½ΠΎ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌ ΠΊΠΎΠΌΠΏΠ°ΠΊΡΠ½ΡΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ. ΠΠΎΠ΄Π΅Π»Ρ ΡΠΎΡΡΠΎΠΈΡ ΠΈΠ· ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π°Π»Π³Π΅Π±ΡΠ°ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ, Π΄Π²ΡΡ
Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΠΈ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ ΠΈΠ½ΡΠ΅Π³ΡΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ²ΡΠ·ΠΈ ΠΈ Π½Π°ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π° ΠΈΠ· ΠΏΡΠΎΡΡΠ΅ΠΉΡΠ΅ΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π‘ΡΡΡΠΊΠΎΠ²Π°. ΠΠΎΡΡΠΎΠΌΡ Π² Π½Π΅ΠΉ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΡΡΠ½ΠΊΡΠΈΠΈ ΠΎΠΊΠ½Π°. Π£ΠΊΠ°Π·ΡΠ²Π°Π΅ΡΡΡ, ΡΡΠΎ, ΡΠΎΠ³Π»Π°ΡΠ½ΠΎ ΡΠ΅ΠΎΡΠ΅ΠΌΠ΅ ΠΡΠ°Π½ΠΊΠ°ΡΠ΅βΠΠ΅Π½Π΄ΠΈΠΊΡΠΎΠ½Π°, ΡΡΠΎΠ³ΠΎ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ Π΄Π»Ρ ΠΎΠ±ΡΡΡΠ½Π΅Π½ΠΈΡ Π½Π΅ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΠΈ ΡΠ΅ΡΡΡΠ΅Ρ
ΠΊΠ»ΡΡΠ΅Π²ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² (Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΠΉ ΠΏΠ΅ΡΠ΅ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ ΠΈ ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΠΉ) ΠΏΡΠΈ ΡΠΈΠΊΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΠΌΠ΅ΠΌΡΠΈΡΡΠΎΡΠ°. ΠΠ° Π½Π΅Π±ΠΎΠ»ΡΡΠΎΠΉ Π²ΡΠ±ΠΎΡΠΊΠ΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
Π΄Π°Π½Π½ΡΡ
ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π€ΡΡΡΠ΅-ΡΠΏΠ΅ΠΊΡΡΡ Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΡΡΠ΄Π° ΡΡΠΈΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ². ΠΠ°Π½Π½ΡΠ΅ ΠΎΡΠ½ΠΎΡΡΡΡΡ ΠΊ ΡΡΡΡΠΊΡΡΡΠ΅ TiN/HfOx/Pt (0 < x < 2). ΠΡΠ΅Π΄Π²Π°ΡΠΈΡΠ΅Π»ΡΠ½ΡΠΉ Π²ΡΠ²ΠΎΠ΄, ΡΡΠ΅Π±ΡΡΡΠΈΠΉ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅ΠΉ ΠΏΡΠΎΠ²Π΅ΡΠΊΠΈ, Π·Π°ΠΊΠ»ΡΡΠ°Π΅ΡΡΡ Π² ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π½ΠΈΠΈ Π½ΠΈΠ·ΠΊΠΈΡ
ΡΠ°ΡΡΠΎΡ ΠΈ ΡΡΠΎΡ
Π°ΡΡΠΈΡΠ½ΠΎΡΡΠΈ ΠΏΠΎΡΠ²Π»Π΅Π½ΠΈΡ ΡΠ°ΡΡΠΎΡ
Unstable Limit Cycles and Singular Attractors in a Two-Dimensional Memristor-Based Dynamic System
This paper reports the finding of unstable limit cycles and singular attractors in a two-dimensional dynamical system consisting of an inductor and a bistable bi-local active memristor. Inspired by the idea of nested intervals theorem, a new programmable scheme for finding unstable limit cycles is proposed, and its feasibility is verified by numerical simulations. The unstable limit cycles and their evolution laws in the memristor-based dynamic system are found from two subcritical Hopf bifurcation domains, which are subdomains of twin local activity domains of the memristor. Coexisting singular attractors are discovered in the twin local activity domains, apart from the two corresponding subcritical Hopf bifurcation domains. Of particular interest is the coexistence of a singular attractor and a period-2 or period-3 attractor, observed in numerical simulations