scholarly journals Ensuring the uniformity of measurements of parameters of vibration during the technical operation of aircraft

2016 ◽  
pp. 6-14 ◽  
Author(s):  
А. Богоявленский ◽  
A. Bogoyavlenskiy
Keyword(s):  
Air Transport ◽  
Design Features ◽  
Vibration Acceleration ◽  
Uniformity Of Measurements ◽  
Unity Of Measurements ◽  
Technical Operation ◽  
Vibration Parameters

In this article we are talking about how to ensure the unity of measurements of vibration parameters in the technical operation of aircraft. In air transport, the main controlled parameters of vibration in flight are vibration speed, vibration acceleration or vibration overload. They are particularly informative for aircraft with turboprop engines, as well as helicopters, which – because of the design features-the vibration is much higher than on aircraft with turbojet engines.

scholarly journals Certification software special SI air transport

2012 ◽  
pp. 14-22 ◽  
Author(s):  
А. Богоявленский ◽  
A. Bogoyavlenskiy ◽  
А. Боков ◽  
A. Bokov
Keyword(s):  
Metrological Service ◽  
Test Laboratory ◽  
Air Transport ◽  
Aviation Industry ◽  
Federal State ◽  
Federal State Unitary Enterprise ◽  
System Software ◽  
Federal Law ◽  
Measurement Systems ◽  
Unity Of Measurements

In order to implement the provisions of the Federal law No. 102-FZ and the regulations of the state system of ensuring the unity of measurements on the basis of the metrological service in the Federal state unitary Enterprise GosNII GA test laboratory software SI and information and measurement systems (IIS). In terms of software testing, the scope of authority of the laboratory includes algorithms and software (standalone and embedded) MI and IIS used in air transport and in the aviation industry. The article describes the main tasks solved by the laboratory in the process of certification of the SYSTEM software.

scholarly journals ANALYSIS OF THE EFFICIENCY OF TRANSPORTATION OF PROCESSED TIMBER MATERIALS BY VARIOUS TYPES OF TRANSPORT AT THE CURRENT STAGE OF DEVELOPMENT OF THE RUSSIAN FEDERATION

2020 ◽  
Vol 3 (3) ◽  
pp. 164-190
Author(s):  
Vadim Nikonov ◽  
Valerii Posmetev
Keyword(s):  
Russian Federation ◽  
Road Transport ◽  
Air Transport ◽  
Design Features ◽  
Main Design ◽  
Stage Of Development ◽  
The Russian Federation ◽  
Water Pipeline ◽  
Land Water ◽  
Current Stage

The article discusses the features of the transportation of timber by various types of transport currently used in the Russian Federation. The conditions for their application are given, taking into account the availability of the used transport routes, as well as the capabilities of the region. The main design features of these types of transport are described. The most important advantages of using road transport for hauling timber in comparison with land, water, pipeline and air transport are presented.

scholarly journals Rapid Diagnostic Test of Metal Turning Using Vibration Parameters Analysis

2021 ◽  
Vol 24 (4) ◽  
pp. 18-28
Author(s):  
E. V. Artamonov ◽  
D. V. Vasil'yev ◽  
V. V. Voronin
Keyword(s):  
Spectral Analysis ◽  
Cutting Tool ◽  
Spectral Composition ◽  
Vibration Acceleration ◽  
Tool Holder ◽  
Operational Diagnostics ◽  
Basic Parameters ◽  
Series Of Experiments ◽  
Scale Experiment ◽  
Vibration Parameters

Purpose of research. The work is devoted to the proof that the vibration of the cutting tool holder carries information about the current cutting force and the type of coming off chips, and the spectral analysis of vibration acceleration will allow to extract this information in full. Methods. The work logically substantiates a scientific assumption about the possibility of prompt diagnostics of the turning process by analyzing the vibration acceleration spectrum of the cutting tool holder. To confirm the consistency of the assumption, a full-scale experiment was carried out. Results. A series of experiments was carried out to register changes in the spectral composition of the vibration of the cutting tool. It has been proven that vibration really carries information about the basic parameters of the cutting process. Conclusion. Spectral analysis of vibration can become the basis for operational diagnostics of metal turning by cutting and form the basis of the Adaptive System for Controlling Cutting Conditions in numerically controlled machines.

THE ENHANCEMENT OF METROLOGICAL SUPPORT THE COATING THICKNESS MEASUREMENTS

2020 ◽  
pp. 36-39
Author(s):  
S. S. Golubev ◽  
L. S. Babadzhanov ◽  
M. L. Babadzhanova ◽  
T. A. Koryushkina
Keyword(s):  
Metrological Support ◽  
Coating Thickness ◽  
Measurement Errors ◽  
Measuring Instruments ◽  
Reference Measuring ◽  
Uniformity Of Measurements ◽  
Foreign Production ◽  
Unit Of Length ◽  
Unity Of Measurements ◽  
Thickness Measurements

The article shows an improved hierarchy scheme in the field of coating thickness measurements, which was revised due to inclusion to Federal Information Fund for Ensuring the Uniformity of Measurements more than a hundred new types of Russian and foreign thickness gauges based on of different operating principles. The range of measurements has expanded and accuracy has been improved. It is shown that about 40 % of the approved types of thickness gauges are measuring instruments of foreign production. For responsible groups of materials (nickel on steel and nickel on bronze), only foreign coating thickness gauges are used. To improve the unity of measurements of the coatings thickness, it was necessary to expand the measurement ranges of the reference measuring standards and thickness gauges from 0 to 120 000 microns, as well as the introduction of new measuring standards borrowed from other hierarchy schemes. The article provides the necessary reference measuring standards and thickness gauges, methods for transmitting a unit of length, measuring ranges and measurement errors.

scholarly journals Functions of Chordotonal Sensilla in Bushcrickets (Orthoptera, Tettigoniidae)

2021 ◽  
Vol 101 (6) ◽  
pp. 755-766
Author(s):  
R. D. Zhantiev ◽  
O. S. Korsunovskaya
Keyword(s):  
Stimulus Frequency ◽  
Vibration Velocity ◽  
Frequency Range ◽  
Vibration Acceleration ◽  
Resonance Vibrations ◽  
Single Sensillum ◽  
Vibrational Sensitivity ◽  
Increased Sensitivity ◽  
Vibration Parameters ◽  
Electrophysiological Methods

Abstract Acoustic and vibrational sensitivity of single identified auditory receptors in bushcrickets was studied by electrophysiological methods. In the intermediate organ, some neurons were identified whose response to acceleration did not depend on the stimulus frequency over a significant frequency range; along with them, there were cells showing increased sensitivity to frequencies of 0.4–0.8 kHz for displacement, and/or 0.1–0.3, 1–1.2, and 1.4–3 kHz for all the vibration parameters. In addition, most of the studied receptors had a zone of increased sensitivity to highfrequency vibrations at 1.5–2.5 kHz. In the sensilla of the crista acustica, increased sensitivity was recorded at frequencies of 0.1–0.3, 0.4–0.8, 1–1.2, and 1.4–2.5 kHz. The best frequencies of a single sensillum may lie in different frequency ranges for different vibration parameters. Such differences in sensitivity to vibration acceleration, vibration velocity, and displacement, and also the different best frequencies in the receptors of the intermediate organ and the crista acustica were probably determined by differences in size, position, and morphological details of the sensilla, their own resonances, and reactions to resonance vibrations of the trachea section bearing the vibroreceptors. Thus, the chordotonal sensillum is a bifunctional mechanoreceptor which, along with auditory sensitivity, can combine the functions of both a displacement receiver and an accelerometer due to the different mechanical properties of its cells and the surrounding structures.

ROLLING BEARING TECHNICAL CONDITION FORECASTING USING VIBRATION ACCELERATION OVERALL LEVEl

2020 ◽  
pp. 12-19
Author(s):  
Yu. V. Sarapulov ◽  
V. A. Sidorov ◽  
A. E. Sushko ◽  
R. A. Khasanov
Keyword(s):  
Practical Importance ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Normal Operation ◽  
Threshold Values ◽  
Vibration Acceleration ◽  
Extensive Experience ◽  
Corporate System ◽  
Vibration Parameters ◽  
Bearing Damage

Traditionally, the assessment of changes in the technical condition of individual components and mechanisms of rotation machines in industry is associated with trends analysis of various vibration parameters. Over the decades of using vibration analysis, we have accumulated extensive experience in faults locating and critically determining, however, it is the assessment of the remaining life that regulates the timing of maintenance and repair activities that is of great practical importance. This article uses the example of a pump unit rolling bearing to consider approaches to predicting the growsup stage of defects based on the analysis of values of vibration acceleration levels. The stages of normal operation and other stages of bearing damage are highlighted, threshold values are calculated and dependences of changes in diagnostic criteria for each stage of the life cycle are constructed. The obtained dependencies show results that are similar in general, but individual in their values, therefore, the accumulation of possible scenarios of events allows creating a knowledge base for predicting the behavior of a mechanical system. The necessary tools for multifactor forecasting were implemented within the SAFE PLANT software platform (LLC SPA DIATECH, Moscow) and are successfully applied at Uralkali PJSC for monitoring the technical condition of all technological equipment and managing MRO processes by integrating the results of diagnostics and forecast assessments into the ORACLE corporate system.

scholarly journals Analyzing vibration parameters of a modern high-speed engine during operation

2021 ◽  
Vol 2061 (1) ◽  
pp. 012056
Author(s):  
V V Gerasidi ◽  
A V Lisachenko
Keyword(s):  
Experimental Research ◽  
High Speed ◽  
Vibration Velocity ◽  
Frequency Range ◽  
Vibration Acceleration ◽  
Vibration Displacement ◽  
Black Sea Region ◽  
High Speed Engine ◽  
Vibration Parameters ◽  
Speed Engine

Abstract The paper presents results of experimental research into vibration parameters of a modern electronic control-enabled main high-speed engine, Caterpillar CAT 3516B as obtained during a running trial of a sea tug. CAT 3500 series Caterpillar high-speed engines are extensively used in sea tugs; there are about 40 units installed in vessels operating in the Azov and Black Sea region. The research technique involved measurement of vibration displacement, vibration velocity, vibration acceleration at an engine and its turbocharger components. The conducted experimental research has shown that in order to evaluate the technical state of an engine, it is necessary to measure vibration displacement and vibration velocity in a frequency range from 1 to 1000 Hz at 0.1 Hz intervals. For turbochargers, the vibration acceleration shall be measured in a frequency range from 1 to 15000 Hz at 1 Hz intervals. The results of the experimental research allowed determining necessary conditions for measurement of vibration parameters of Caterpillar CAT-3500 series modern high-speed engines commonly used in sea tugs. The experimental research into vessel installations by in-place diagnostics at operating sea-going vessels forms a foundation of an autonomous ship control system.

scholarly journals Implementation of Mass & Center-of-gravity Monitoring in course of Aerial Vehicles Maintenance

2012 ◽  
pp. 9-16
Author(s):  
А. Богоявленский ◽  
A. Bogoyavlenskiy
Keyword(s):  
Russian Federation ◽  
Metrological Support ◽  
Metrological Service ◽  
Air Transport ◽  
Civil Aviation ◽  
Mass Center ◽  
Limited Volume ◽  
Aerial Vehicles ◽  
The Russian Federation ◽  
Unity Of Measurements

The publications of specialists of FSUE GosNII GA presented in this issue complete the cycle started in MI No. 6-2012, consisting of 3 articles that tell about metrological support of production activities of air transport enterprises. The cycle is dedicated to the anniversary date: the 35th anniversary of the establishment of the Metrological service of civil aviation (GA) by order of the Minister of December 22, 1977 № 193. This order GosNII GA, was appointed the Head organization of the metrological service (GMA) GA, retaining this status and in the new Russia (joint order of the Department of air transport of Ministry of transport of the Russian Federation and the Commission for regulation of air traffic – on Rosaeronavigatsia from 27.11.1995, the number of DV-126/113). Unfortunately, the limited volume of the journal does not allow to reveal in detail all aspects of the metrological activities of FGUP GosNII GA as GOMC GA. The materials we offer readers of cycle lights in this respect are some diverse issues. Nevertheless, it should be noted that all these years and to the present time the Institute is at the forefront of solving the problems of ensuring the unity of measurements in special areas of production activities of air transport

scholarly journals Theoretical studies of the force interaction of a three-axle vehicle with a stand with single rollers

2022 ◽  
Vol 14 (2) ◽  
pp. 52-61
Author(s):  
Іhоr Мarmut ◽  
◽  
Vitalii Kashkanov ◽  
Volodymyr Zuiev ◽  
◽  
...  
Keyword(s):  
Equations Of Motion ◽  
Thermal Conditions ◽  
Technical Condition ◽  
The Body ◽  
Power Model ◽  
Theoretical Studies ◽  
Design Features ◽  
Complex Objects ◽  
Technical Operation ◽  
Geometrical Scheme

The article discusses the issues of modeling conditions for obtaining diagnostic information about complex objects. Checking the braking and traction properties of three-axle trucks on a roller stand is considered as an example. As shown by many studies, in particular, which were carried out at the Department of Technical Operation and Service of Automobiles of the KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. Such stands allow you to reproduce the real speed and thermal conditions of the brakes. To improve the accuracy of diagnosing a car on a roller stand, it is necessary to have an idea of the nature of the interaction of the car's wheels with the rollers. The study of the rolling of the wheels of a three-axle car bogie on the stand rollers was carried out at the Department of Technical Operation of Cars, KhNADU. However, all these studies were carried out on biaxial stands, where each bogie wheel rests on a pair of rollers. In order to exclude wheel slippage, partial braking is recommended, that is, a mode when partial force on the pedals (or pressure) is created in the system and, as a result, incomplete braking force develops in the braking mechanisms (or deceleration reaches some partial value from the full one). It is necessary to analyze the possibility of implementing full brake test modes on a roller stand by improving the layout and geometrical scheme of the stand. A power model of the system of interaction between a car and a stand has been developed, taking into account the design features of the stand and the design features of the suspension of a three-axle car. The power model of this system includes the equations of equilibrium of the body and two axles, as well as the equations of motion for the rollers and wheels of the car. Based on the results of the analysis of the acting forces in the "car-stand" system, the coefficients of the use of the load q during the brake tests of a three-axle car were determined, and the longitudinal stability of the car was also analyzed. The obtained research results allowed to improve the theory of interaction of the wheels of three-axle vehicles with single rollers of the diagnostic stand.

scholarly journals Vibration Transmitted to the Human Body during the Patient’s Ride in a Wheelchair

2017 ◽  
Vol 42 (1) ◽  
pp. 137-148 ◽  
Author(s):  
Zygmunt Dziechciowski ◽  
Magdalena Kromka-Szydek
Keyword(s):  
Spectral Analysis ◽  
Human Body ◽  
The Body ◽  
Frequency Range ◽  
Vibration Acceleration ◽  
Surface Type ◽  
Wheelchair User ◽  
Vibration Parameters ◽  
Floor Surfaces ◽  
Insight Into

Abstract The study investigates the spectra of vibrations transmitted onto the body of a wheelchair user during the ride on typical floor surfaces in public buildings and in their vicinity. Three wheelchair types are considered in the study (universal and active ones). Selected factors are examined that determine the amplitude of vibration acceleration acting upon humans in the analysed frequency range (wheelchair type, user’s body mass, surface type). The spectral analysis gives an insight into some of the factors which lead to a change of the vibration parameters registered at the user’s seat.

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