scholarly journals ANALYSIS OF TEMPORAL AND FREQUENCY CHARACTERISTICS OF SIMULTANEOUS GEODEFORMATION SIGNALS REGISTERED AT “KARYMSHINA” SITE

2019 ◽  
pp. 166-172
Author(s):  
М.А. Мищенко ◽  
Ю.В. Марапулец ◽  
И.А. Ларионов
Keyword(s):  
Frequency Response ◽  
Frequency Characteristics ◽  
Response Magnitude ◽  
Signal Frequency ◽  
Spectral Components

На Камчатке в измерительном пункте Карымшина в период с 2016 г. по настоящее время проводятся одновременные геодеформационные наблюдения. Для их проведения установлены лазерный деформограф-интерферометр и трехкомпонентный сейсмоакустический приёмник. Ранее выявлено, что в период деформационных возмущений в породах регистрируется большое количество сигналов. В настоящей работе представлены результаты анализа регистрируемых сигналов, исследованы их амплитудно-частотные характеристики и выявлены постоянные спектральные составляющие. Simultaneous geodeformational observations have been carried out from 2016 to the present time at Karymshina site on Kamchatka. A laser deformograph-interferometer and a three-component seismoacoustic receiver were installed to conduct these observations. Earlier it was revealed that a large number of signals were registered in rocks during deformation disturbances. In this work, we present the analysis results of the registered signals. Signal frequency response (magnitude and phase) was studied, and constant spectral components were identified.

scholarly journals Fast frequency response of inverter-based resources and its impact on system frequency characteristics

2020 ◽  
Vol 3 (5) ◽  
pp. 475-485
Author(s):  
Lining Su ◽  
Xiaohui Qin ◽  
Shang Zhang ◽  
Yantao Zhang ◽  
Yilang Jiang ◽  
...  
Keyword(s):  
Frequency Response ◽  
Frequency Characteristics ◽  
System Frequency

Small Signal Frequency Response of laser diodes using a femtosectond frequency comb

2002 ◽  
Author(s):  
Ovidio Anton ◽  
G. Vaschenko ◽  
Dinesh Patel ◽  
Jon M. Pikal ◽  
Carmen S. Menoni
Keyword(s):  
Frequency Response ◽  
Frequency Comb ◽  
Laser Diodes ◽  
Signal Frequency ◽  
Small Signal

Large-Signal Frequency Response of an HEB Mixer: From 300 MHz to Terahertz

2011 ◽  
Vol 21 (3) ◽  
pp. 628-631 ◽  
Author(s):  
Y. Lobanov ◽  
E. Tong ◽  
R. Blundell ◽  
A. Hedden ◽  
B. Voronov ◽  
...  
Keyword(s):  
Frequency Response ◽  
Signal Frequency ◽  
Large Signal

scholarly journals Short vowels of the Teleut language for F1 and F2 (experimental phonetic observation)

2019 ◽  
pp. 58-65
Author(s):  
A. A. Dobrinina
Keyword(s):  
Spectral Analysis ◽  
Computer Program ◽  
Frequency Response ◽  
Spectral Composition ◽  
Frequency Characteristics ◽  
Short Vowels ◽  
Audio Files

This article presents the results of work to determine the spectral composition of the vowels of the teleutian lan-guage, based on data obtained in the field. The recorder was recorded in mp3 format, the data was converted to wav format using Freemake Audio Converter, Audacity program was used in the processing of audio files, the computer program SpeechAnalyzer was used in the decoding and analysis of materials. On the basis of spectral analysis, the vocalism of the Teleut language was determined. However, because of the sig-nificant oppositions of phonemes are the contrasts in abilitanti / albilineans and the extent of the solution. There are three types of vowels that differ in a number. Consideration of the frequency characteristics of high formants shows that when pronouncing the vowels of the front row e, and, ö, ʏ there is a significant increase in frequencies in the upper part of the spectrum. The vowels of the back row o, y, on the contrary, are characterized by a significant decrease in the sec-ond formant. The vowels a and u at frequency response is somewhere in the middle.

scholarly journals Fractional Modeling of the AC Large-Signal Frequency Response in Magnetoresistive Current Sensors

Sensors ◽  
2013 ◽  
Vol 13 (12) ◽  
pp. 17516-17533 ◽  
Author(s):  
Sergio Ravelo Arias ◽  
Diego Ramírez Muñoz ◽  
Jaime Sánchez Moreno ◽  
Susana Cardoso ◽  
Ricardo Ferreira ◽  
...  
Keyword(s):  
Frequency Response ◽  
Signal Frequency ◽  
Large Signal ◽  
Fractional Modeling ◽  
Current Sensors

scholarly journals Experimental Complex for Studying the Possibilities of Using Hydroacoustic Sensors in Underwater Vision Systems

2021 ◽  
Vol 24 (4) ◽  
pp. 54-64
Author(s):  
V.A. Shirokov ◽  
V.N. Milich
Keyword(s):  
Frequency Response ◽  
Aquatic Environment ◽  
Experimental Studies ◽  
Frequency Characteristics ◽  
Complex Object ◽  
Front Wall ◽  
Object A ◽  
Sensor Resistance ◽  
Measuring Complex ◽  
Comparison Of The Results

A description of a laboratory experimental and measuring complex is given, including a linear aquatic environment in the form of an extended cylindrical reservoir (hydro wave) and an experimental pool equipped with a system for generating test hydroacoustic signals, a set of electroacoustic and acoustoelectric transducers, and a system for amplifying and digitizing received signals. The results of experimental studies of hydroacoustic piezoelectric sensors and the features of the propagation of the waves generated by them in the described laboratory complex are presented. These results include: an assessment of the sensitivity of sensors, an assessment of the frequency characteristics of sensors, a study of the frequency response of a system of two sensors fixed at the ends of a horizontal hydro-wave guide, a comparison of the results of measurements of the frequency response of sensors in a pipe and a pool, a comparison of signal pulling over time in a pipe and a pool, a study of operation sensors in sonar mode. The most significant results illustrating the behavior of hydroacoustic signals and the potential of the measuring complex are the established possibilities for determining the resonance features of electroacoustic transducers and the detail of the characteristics of the reflection of acoustic signals from objects in an aquatic environment. The main investigated characteristics of hydroacoustic sensors are the sensitivity and frequency characteristics of the investigated sensors, the amplitude-frequency characteristics of the system from the transmitting and receiving transducers, and the features of the transducers' operation in the sonar mode. According to the research results, the characteristics of the sensitivity of the sensors and the assessment of the spread of the sensitivity indicators for representatives of the same type of different parties were obtained. The study of the frequency characteristics of the sensors was focused on the study of the dependence of the module and the phase of the sensor resistance on the frequency and on the determination of the resonance characteristics of the sensors. The presence of resonances (resistance minima) and antiresonances (resistance maxima) in several frequency regions was established. When examining the transducers in sonar mode, a glare structure of echo signals from the components of a complex object (a sphere suspended by a thread), separated by time intervals of 12.3 microseconds, was clearly observed. The delay of the signal reflected from the filament in relation to the signal reflected from the front wall of the sphere is due to the distance by two radii of the sphere, covered by the signal reflected from the filament. Carrying out research in two experimental situations (linear hydro wave and experimental pool) allows assessing the degree of adequacy of the results obtained in the sense of comparing similar experiments in different conditions.

scholarly journals Parametrical Synthesis of Radio Devices with the Set Quantity of Identical Cascades for Inclusion Variants of Jet Two-port Networks between a Nonlinear Part and Loading

2021 ◽  
Vol 24 (6) ◽  
pp. 27-37
Author(s):  
A. A. Golovkov ◽  
A. V. Fomin
Keyword(s):  
Frequency Response ◽  
Numerical Optimization ◽  
Transfer Functions ◽  
Optimization Methods ◽  
Frequency Characteristics ◽  
Algebraic Equations ◽  
Nonlinear Part ◽  
Non Linear ◽  
Microwave Control ◽  
Voltage Feedback

Introduction. The ability to analytically determine some parameters of various radio devices, which are optimal according to the criterion of providing the set values of the modules and phases of transfer functions at the required number of frequencies, significantly reduces the time for numerical optimization of the rest of the parameters according to the criterion of forming the required frequency response and frequency response in the frequency band. Until now, such problems with respect to radio devices have been solved only for one stage of the "nonlinear part – matching device" or "matching device – nonlinear part" type. As a matching device, reactive, resistive, complex, or mixed quad-poles were used.Aim. Development of algorithms for parametric synthesis of radio devices with an arbitrary number of identical cascades of the "nonlinear part – matching reactive quadrupole" type according to the criterion of ensuring the specified frequency characteristics. Non-linear parts are represented as a non-linear element and parallel or serial current or voltage feedback.Materials and methods. Four-pole theory, matrix algebra, decomposition method, method of synthesis of microwave control devices, numerical optimization methods.Results. Systems of algebraic equations are formed and solved. Models of optimal quadrupole conductors are obtained in the form of mathematical expressions for determining the relationships between the elements of their classical transmission matrix and for finding the frequency dependences of the resistances of two-pole conductors.Conclusion. It is shown that the frequency characteristics of the studied radio devices from the same stages are identical or similar to the frequency characteristics of radio devices from the same stage, but with the signal source and load resistances changed in a certain way. Such schemes are called equivalent. A comparative analysis of the theoretical results (frequency response and frequency response of radio devices) obtained by mathematical modeling in the "MathCad" system, and the experimental results obtained by circuit modeling in the "OrCAD" and "MicroCap" systems, shows their satisfactory agreement.

scholarly journals Method for reducing phase fluctuations of a precision frequency response meter for microwave quantum generators

2021 ◽  
Vol 2086 (1) ◽  
pp. 012071
Author(s):  
M A Vodopyanov ◽  
K A Menzorov ◽  
V V Davydov ◽  
V Yu Rud
Keyword(s):  
Frequency Response ◽  
Block Diagram ◽  
Frequency Characteristics ◽  
Frequency Multiplier ◽  
Phase Fluctuations ◽  
Digital Frequency ◽  
Frequency Comparator ◽  
Improve Accuracy ◽  
Measuring Frequency ◽  
Precision Frequency

Abstract The principle of operation of the device for measuring frequency characteristics is considered. Block diagram of a device for measuring the frequency characteristics of a digital frequency comparator with correlation quadrature processing and description of their components is illustrated. The block diagram of the frequency multiplier is given. The accuracy characteristics of the developed meter design are evaluated. They are compared with the characteristics of previously used devices. The Improve accuracy characteristics and increased stability of operation were found.

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