A phase synchronization system of two high-speed photographic units (ВФУ-1)

2009 ◽  
Vol 52 (6) ◽  
pp. 862-864 ◽  
Author(s):  
Yu. A. Barinov
Keyword(s):  
High Speed ◽  
Phase Synchronization ◽  
Synchronization System

Phase synchronization system receiver module for the mid-frequency Square Kilometre Array

2020 ◽  
Vol 6 (04) ◽  
Author(s):  
Skevos F. E. Karpathakis ◽  
Charles T. Gravestock ◽  
David R. Gozzard ◽  
Thea R. Pulbrook ◽  
Sascha. W. Schediwy
Keyword(s):  
Phase Synchronization ◽  
Synchronization System ◽  
Square Kilometre Array ◽  
Receiver Module

scholarly journals The Phenomenon of Bistable Phase Difference Intervals in the Times-Frequency Vibration Synchronization System Driven by Two Homodromy Exciters

2020 ◽  
Vol 2020 ◽  
pp. 1-24
Author(s):  
Lingxuan Li ◽  
Xiaozhe Chen
Keyword(s):  
Phase Difference ◽  
Rotational Speed ◽  
Phase Synchronization ◽  
Perturbation Parameter ◽  
Vibration System ◽  
Synchronization System ◽  
Motion Trajectories ◽  
Frequency Capture ◽  
Perturbation Parameters ◽  
The Times

A vibration system with two homodromy exciters operated in different rotational speed is established to investigate whether the phenomenon of bistable phase difference intervals exists in the times-frequency vibration synchronization system. Some constructive conclusions are proposed. (1) By introducing an average angular velocity perturbation parameter ε0 and two sets of phase difference perturbation parameters and ε2, the frequency capture criterion and the necessary criteria for realizing the times-frequency vibration synchronization are derived. The corresponding stability analysis is carried out. (2) By the theoretical analysis and experiments, it is verified that the times-frequency vibration synchronization system exists the phenomena of bistable phase difference interval. That is, the phase differences between the two homodromy exciters are stable around 180 degrees when they are located at a short distance; the antiphase synchronization phenomenon appears. On the contrary, they are stable around 0 degrees at the in-phase synchronization state. (3) Because of the two homodromy exciters operating in the different rotational speed, the vibration system obtains relatively complex compound motion trajectories; the corresponding application is investigated by adding a feeding material chamber. The times-frequency vibration synchronization system can be used to design the vibration mill for reducing its low-energy zone and developing chaotic mixing equipment for obtaining a better mixing effect.

scholarly journals Identifying synchronization between flow boiling inside two parallel minichannels using joint recurrence plots

2018 ◽  
Vol 240 ◽  
pp. 03006
Author(s):  
Hubert Grzybowski ◽  
Iwona Gruszczyńska ◽  
Romuald Mosdorf
Keyword(s):  
Mass Flux ◽  
High Speed ◽  
Phase Synchronization ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Measurement Data ◽  
Heat Rate ◽  
Phase Flow ◽  
Two Phase ◽  
Oscillation Analysis

In this study the flow boiling inside two parallel tubes with a diameter of 1 mm was analysed in order to determine synchronization level between the channels. An experimental setup was built to investigate the pressure and temperature oscillation in parallel minichannels. During the experiments, the two-phase flow patterns were recorded by high speed camera and also the presence of vapour in channel outlet was measured by laser-phototransistor sensor. Various types of two-phase flow instabilities were observed in investigated the system. Experiment was carried out for various heat rate and mass flux. The method of identifying synchronization between flow boiling between parallel channel will be presented on measurement data recorded for heat rate q equal to 50.15 W and the average mass flux ṁ equal to 38.8 kg/m2s. The signal was subjected to a nonlinear analysis based on the joint recurrence plot (JRP) method. The JRP method was carried out in order to determine synchronization level between signals from parallel channels. Results of pressure and laser-phototransistor oscillation analysis shows that during flow boiling phase synchronization and phase shift between the channels can be detected using appropriate RQA indicators.

ДИНАМИЧЕСКИЕ ХАРАКТЕРИСТИКИ СОВРЕМЕННЫХ ВЫСОКОСКОРОСТНЫХ СИСТЕМ СИНХРОНИЗАЦИИ

2020 ◽  
Vol 96 (3s) ◽  
pp. 277-285
Author(s):  
В.Е. Мартиросов ◽  
Г.А. Алексеев
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Phase Detector ◽  
Frequency Detuning ◽  
Synchronization System ◽  
Charge Pumping ◽  
Initial Frequency ◽  
Order Of Magnitude ◽  
Acquisition Speed ◽  
Frequency Phase

Представлены результаты исследований динамических характеристик современных высокоскоростных систем синхронизации: инновационной глобально линеаризованной системы синхронизации (ГЛСС) и системы ФАПЧ с импульсным частотно-фазовым детектором с накачкой заряда. Показано, что при значительных начальных частотных расстройках выигрыш в быстродействии системы ГЛСС может достигать порядка и выше. The paper highlights the results of research of modern high-speed synchronization systems dynamic characteristics, namely: the Globally Linearized Synchronization System (GLSS) and the PLL system with a pulsed frequency-phase detector with charge pumping. It has been shown that with significant initial frequency detuning, the acquisition speed gain of the GLSS system can reach an order of magnitude and higher.

scholarly journals SYNTHESIS AND ANALYSIS OF THE PHASE SYNCHRONIZATION SYSTEM UNDER THE REDUCTION OF PERMANENT DYNAMIC ERRORS IN THE CARRIER FREQUENCY TRACKING MODE

2020 ◽  
pp. 90-99
Author(s):  
O. L. Turovsky ◽  
O. A. Khakhlyuk
Keyword(s):  
Control Systems ◽  
Carrier Frequency ◽  
Open Channel ◽  
Phase Synchronization ◽  
Combined System ◽  
Synchronization System ◽  
Radio Engineering ◽  
Frequency Discriminator ◽  
Dynamic Errors ◽  
And Control

The successful solution of the problem of further improving the efficiency of communication systems largely depends on the quality of operation of systems and devices that are part of them. Phase synchronization systems are widely implemented in various radio engineering devices of communication, radar and control technology, as well as in the device of precise magnetic recording. In particular, in phase-coherent telecommunications and control systems, they are used to restore the carrier and clock frequencies and for coherent demodulation of analog and digital signals with angular modulation. The issues of increasing the efficiency of the phase synchronization system of phase-coherent telecommunication and control systems in radio engineering devices are considered in the work. Namely, the results of synthesis and analysis of the scheme of construction of the combined system of phase synchronization under the condition of reduction of constant dynamic errors during monitoring of the carrier frequency, the phase of which is modulated by a deterministic Doppler signal are presented. As a result of research it is established that the synthesis of the open channel in the combined synchronization systems allows to realize them on invariant schemes which provide reduction of constant dynamic errors by increase of the order of astatism. The use as an open communication frequency discriminator, allows to increase the order of astatism of the combined system synchronization system to the second order. The open channel is made in the form of parallel (serial) connection of two links of the frequency discriminator with the proposed transfer function allows to increase the order of astatism to the third and higher order and does not affect the stability of the system. The analysis of the proposed schemes showed that the effect on the phase error dispersion of the synchronization system can be achieved by changing the parameters of the broken link of the scheme of construction of the specified system.

scholarly journals Synchronization and chimera states in the network of electrochemically coupled memristive Rulkov neuron maps

2021 ◽  
Vol 18 (6) ◽  
pp. 9394-9409
Author(s):  
Mahtab Mehrabbeik ◽  
◽  
Fatemeh Parastesh ◽  
Janarthanan Ramadoss ◽  
Karthikeyan Rajagopal ◽  
...  
Keyword(s):  
High Speed ◽  
Phase Synchronization ◽  
Electrical Coupling ◽  
Amplitude Death ◽  
Collective Behaviors ◽  
Chimera State ◽  
Dynamical Behaviors ◽  
Chemical Coupling ◽  
Coupling Strengths ◽  
Chemical Synapses

<abstract> <p>Map-based neuronal models have received much attention due to their high speed, efficiency, flexibility, and simplicity. Therefore, they are suitable for investigating different dynamical behaviors in neuronal networks, which is one of the recent hottest topics. Recently, the memristive version of the Rulkov model, known as the m-Rulkov model, has been introduced. This paper investigates the network of the memristive version of the Rulkov neuron map to study the effect of the memristor on collective behaviors. Firstly, two m-Rulkov neuronal models are coupled in different cases, through electrical synapses, chemical synapses, and both electrical and chemical synapses. The results show that two electrically coupled memristive neurons can become synchronous, while the previous studies have shown that two non-memristive Rulkov neurons do not synchronize when they are coupled electrically. In contrast, chemical coupling does not lead to synchronization; instead, two neurons reach the same resting state. However, the presence of both types of couplings results in synchronization. The same investigations are carried out for a network of 100 m-Rulkov models locating in a ring topology. Different firing patterns, such as synchronization, lagged-phase synchronization, amplitude death, non-stationary chimera state, and traveling chimera state, are observed for various electrical and chemical coupling strengths. Furthermore, the synchronization of neurons in the electrical coupling relies on the network's size and disappears with increasing the nodes number.</p> </abstract>

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