7 research outputs found
Canards and invariant manifolds with stability change in a competitive model of population dynamics
ΠΠ° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΏΠΎΠΏΡΠ»ΡΡΠΈΠΎΠ½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ Π΄Π»Ρ ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΊΠ»Π°ΡΡΠ° ΡΡΠ΅Ρ
ΠΌΠ΅ΡΠ½ΡΡ
ΡΠΈΠ½Π³ΡΠ»ΡΡΠ½ΠΎ Π²ΠΎΠ·ΠΌΡΡΠ΅Π½Π½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΡΡΠ°Π²Π½Π΅Π½ΠΈΠΉ. ΠΡΠ½ΠΎΠ²Π½ΠΎΠΉ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΡ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΠΌΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΡΠ²Π»ΡΠ΅ΡΡΡ Π½Π°Π»ΠΈΡΠΈΠ΅ ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΌΠ΅Π΄Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΠΈΠ½Π²Π°ΡΠΈΠ°Π½ΡΠ½ΠΎΠ³ΠΎ ΠΌΠ½ΠΎΠ³ΠΎΠΎΠ±ΡΠ°Π·ΠΈΡ ΡΠΎ ΡΠΌΠ΅Π½ΠΎΠΉ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ. ΠΡΠΎ ΠΎΠ±ΡΡΠΎΡΡΠ΅Π»ΡΡΡΠ²ΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΌΠΎΠ΄ΠΈΡΠΈΡΠΈΡΠΎΠ²Π°ΡΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΡ ΡΡΠ΅Ρ
ΠΌΠ΅ΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΠΏΡΡΠ΅ΠΌ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠΎΡΠΌΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ Π΅Π΅ Π΄Π²ΡΡ
ΠΌΠ΅ΡΠ½ΡΡ
ΠΏΡΠΎΠ΅ΠΊΡΠΈΠΉ. ΠΡΠ΅Π΄Π»Π°Π³Π°Π΅ΠΌΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΌΠΎΠΆΠ½ΠΎ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡ ΠΊΠ°ΠΊ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΠΈ ΠΏΡΠΎΡΡΠΎΠΉ ΡΠΏΠΎΡΠΎΠ± ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ-ΡΡΠΎΠΊ Π² ΡΡΠ΅Ρ
ΠΌΠ΅ΡΠ½ΠΎΠΌ ΠΏΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅. In the paper, a technique for modelling various oscillations for a class of threeβdimensional singularly perturbed systems is considered. A main feature of the
systems under consideration is the presence of an exact slow invariant manifold of variable stability. This circumstance makes it possible to vary the oscillations by changing the shapes of the trajectories of two 2Dβprojections of the original 3D system. The discussed approach can be extended to canard chase in 3D. It should be noted that in comparison with traditional techniques of canard chase in 3D, this approach seems to be simpler. We demonstrate this approach by use of a competitive model of population dynamics.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΡΠΈ ΡΠΈΠ½Π°Π½ΡΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π Π€Π€Π ΠΈ ΠΡΠ°Π²ΠΈΡΠ΅Π»ΡΡΡΠ²Π° Π‘Π°ΠΌΠ°ΡΡΠΊΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ Π² ΡΠ°ΠΌΠΊΠ°Ρ
Π½Π°ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ΅ΠΊΡΠ° 16-41-630-529 ΠΈ ΠΠΈΠ½ΠΈΡΡΠ΅ΡΡΡΠ²Π° ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΠΈ Π½Π°ΡΠΊΠΈ Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΠΊΡΡΠ΅Π½ΡΠΎΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΠΈ Π‘Π°ΠΌΠ°ΡΡΠΊΠΎΠ³ΠΎ ΡΠ½ΠΈΠ²Π΅ΡΡΠΈΡΠ΅ΡΠ° (2013-2020)
Invariant surface with the change of stability in a neuron activity model
Π ΡΠ°Π±ΠΎΡΠ΅ Ρ ΠΏΠΎΠΌΠΎΡΡΡ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π° ΠΈΡΡΠ»Π΅Π΄ΡΡΡΡΡ ΠΊΡΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²Π»Π΅Π½ΠΈΡ Π² Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π½Π΅ΠΉΡΠΎΠ½Π½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Ρ Π°ΡΠΈΠΌΠΌΠ΅ΡΡΠΈΡΠ½ΡΠΌ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΠΏΠ°ΡΡΠΈΠ°Π»ΡΠ½ΡΡ
ΠΎΡΡΠΈΠ»Π»ΡΡΠΎΡΠΎΠ². ΠΠΎΡΡΡΠΎΠ΅Π½Π° ΠΈΠ½Π²Π°ΡΠΈΠ°Π½ΡΠ½Π°Ρ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΡ ΡΠΎ ΡΠΌΠ΅Π½ΠΎΠΉ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ, ΡΠΎΡΡΠΎΡΡΠ°Ρ ΠΏΠΎΠ»Π½ΠΎΡΡΡΡ ΠΈΠ· ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΠΉ-ΡΡΠΎΠΊ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ. ΠΠ°ΠΆΠ΄Π°Ρ ΡΠ°ΠΊΠ°Ρ ΡΡΠ°Π΅ΠΊΡΠΎΡΠΈΡ-ΡΡΠΊΠ° ΠΌΠΎΠ΄Π΅Π»ΠΈΡΡΠ΅Ρ ΠΊΡΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠ΅ΠΆΠΈΠΌ, ΠΎΡΠ²Π΅ΡΠ°ΡΡΠΈΠΉ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠΌΡ Π½Π°ΡΠ°Π»ΡΠ½ΠΎΠΌΡ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ ΡΠΈΡΡΠ΅ΠΌΡ.
Critical phenomena in a neuron activity model with asymmetric interaction of partial oscillators are investigated with help of a geometric approach. An invariant surface with changing of stability consisting entirely of canards is constructed. Each such canard (a duck-trajectory) corresponds to a critical regime with different initial conditions.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΡΠΈ ΡΠΈΠ½Π°Π½ΡΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π Π€Π€Π ΠΈ ΠΡΠ°Π²ΠΈΡΠ΅Π»ΡΡΡΠ²Π° Π‘Π°ΠΌΠ°ΡΡΠΊΠΎΠΉ
ΠΎΠ±Π»Π°ΡΡΠΈ Π² ΡΠ°ΠΌΠΊΠ°Ρ
Π½Π°ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ΅ΠΊΡΠ° No 16-41-630529 ΠΈ ΠΠΈΠ½ΠΈΡΡΠ΅ΡΡΡΠ²Π° ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΠΈ Π½Π°ΡΠΊΠΈ
Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ Π² ΡΠ°ΠΌΠΊΠ°Ρ
ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠ½ΠΊΡΡΠ΅Π½ΡΠΎΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΠΈ Π‘Π°ΠΌΠ°ΡΡΠΊΠΎΠ³ΠΎ
ΡΠ½ΠΈΠ²Π΅ΡΡΠΈΡΠ΅ΡΠ° (2013β2020)
Cheap Control for Quadrupter
Π ΡΠ°Π±ΠΎΡΠ΅ ΠΎΠΏΠΈΡΠ°Π½ Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΡΠΈΡΠΎΠΊΠΈΠΉ ΠΊΠ»Π°ΡΡ Π·Π°Π΄Π°Ρ Ρ Π΄Π΅ΡΠ΅Π²ΠΎΠΉ ΠΏΠ»Π°ΡΠΎΠΉ Π·Π° ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠ΅. Π ΠΎΡΠ»ΠΈΡΠΈΠ΅ ΠΎΡ ΡΡΡΠ΅ΡΡΠ²ΡΡΡΠΈΡ
Π² ΡΡΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ°Π±ΠΎΡ, ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΎ ΠΏΡΠΎΡΡΠΎΠ΅ ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ Π·Π°Π΄Π°ΡΠΈ ΡΠΈΠ½ΡΠ΅Π·Π° ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ Ρ ΠΈΠ½ΡΠ΅Π³ΡΠ°Π»ΡΠ½ΡΠΌ ΠΊΠ²Π°Π΄ΡΠ°ΡΠΈΡΠ½ΡΠΌ ΠΊΡΠΈΡΠ΅ΡΠΈΠ΅ΠΌ ΠΊΠ°ΡΠ΅ΡΡΠ²Π°. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΏΡΠΈΠΌΠ΅ΡΠ° ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Π° Π·Π°Π΄Π°ΡΠ° ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΊΠ²Π°Π΄ΡΠΎΠΊΠΎΠΏΡΠ΅ΡΠΎΠΌ.
The paper describes a broad class of problems with a cheap control. In contrast to existing works in this field, a simple solution of the problem of synthesis of optimal control with an integral quadratic performance index is proposed. As an example, we consider the quadrupter control problem.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΎ ΠΏΡΠΈ ΡΠΈΠ½Π°Π½ΡΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ΄Π΄Π΅ΡΠΆΠΊΠ΅ Π Π€Π€Π ΠΈ ΠΡΠ°Π²ΠΈΡΠ΅Π»ΡΡΡΠ²Π° Π‘Π°ΠΌΠ°ΡΡΠΊΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ Π² ΡΠ°ΠΌΠΊΠ°Ρ
Π½Π°ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ΅ΠΊΡΠ° No 16-41-630524
Simulation of CO and CO2 emissions in model combustion chamber based on the combination LES and Reactor Network model
Air pollution is a major concern of recent decades, which has a serious toxicological impact on human health and the environment. It has a number of different emission sources, but one of the main sources of environmental pollutions is transported systems, in particular aviation gas turbine engines (GTE). Currently environmental issues of GTE are mainly solved by using semi-empirical techniques and experimental refinement of prototypes. In this paper we presented an algorithm for simulating the emission of CO and CO2 in a model combustion chamber under various initial conditions and compared the results, validated with an experimental data
Simulation of CO and CO
Air pollution is a major concern of recent decades, which has a serious toxicological impact on human health and the environment. It has a number of different emission sources, but one of the main sources of environmental pollutions is transported systems, in particular aviation gas turbine engines (GTE). Currently environmental issues of GTE are mainly solved by using semi-empirical techniques and experimental refinement of prototypes. In this paper we presented an algorithm for simulating the emission of CO and CO2 in a model combustion chamber under various initial conditions and compared the results, validated with an experimental data