scholarly journals About Identification of Instrument Error Parameters for a Gravity Gradiometer

2021 ◽  
Author(s):  
A. A. Golovan ◽  
E. V. Gorushkina ◽  
I. A. Papusha
Keyword(s):  
Mathematical Models ◽  
Test Bench ◽  
Practical Implementation ◽  
Stationary Mode ◽  
Special Test ◽  
Gravity Gradiometer ◽  
Instrument Error ◽  
Raw Data ◽  
Serial Production

AbstractThe article presents the description of two algorithms used for processing of the raw data of a gravity gradiometer. These algorithms are intended for estimation of some instrument errors. The first algorithm is applicable for the instrument operation in its stationary mode, the second proposes the use of a special test bench. Rotary gravity gradiometer of the accelerometric type was taken as a prototype for relevant mathematical models. Nowadays this type of gradiometer is brought to the stage of practical implementation and serial production.

scholarly journals LabVIEW Interface for Controlling a Test Bench for Photovoltaic Modules and Extraction of Various Parameters

2015 ◽  
Vol 6 (3) ◽  
pp. 498 ◽  
Author(s):  
Abderrezak Guenounou ◽  
Ali Malek ◽  
Michel Aillerie ◽  
Achour Mahrane
Keyword(s):  
Numerical Simulation ◽  
Mathematical Models ◽  
Energy Production ◽  
Test Bench ◽  
Graphical Interface ◽  
Detailed Report ◽  
Photovoltaic Modules ◽  
Pv Modules ◽  
Computer Controlled ◽  
Physical Phenomena

Numerical simulation using mathematical models that take into account physical phenomena governing the operation of solar cells is a powerful tool to predict the energy production of photovoltaic modules prior to installation in a given site. These models require some parameters that manufacturers do not generally give. In addition, the availability of a tool for the control and the monitoring of performances of PV modules is of great importance for researchers, manufacturers and distributors of PV solutions. In this paper, a test and characterization protocol of PV modules is presented. It consists of an outdoor computer controlled test bench using a LabVIEW graphical interface. In addition to the measuring of the IV characteristics, it provides all the parameters of PV modules with the possibility to display and print a detailed report for each test. After the presentation of the test bench and the developed graphical interface, the obtained results based on an experimental example are presented.

scholarly journals Mathematical Model of Hybrid and Electric Cars Control System

2021 ◽  
Vol 320 ◽  
pp. 01014
Author(s):  
Vladimir Kozlovsky
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Mathematical Models ◽  
High Voltage ◽  
Test Bench ◽  
Hybrid Vehicles ◽  
Storage Battery ◽  
Battery Cell ◽  
Electric Cars ◽  
High Voltage Battery

The paper presents development results of the complex of simulation mathematical models of real-time and algorithms for a semi-natural test bench of the control system of a high-voltage storage battery of hybrid vehicles. They are designed to control the physical model of the test bench, simulating the characteristics of the cells of the high-voltage storage battery and other components that make up the high-voltage storage battery. This study aims to implement a complex of mathematical models and software with the required accuracy of parameters and signals that simulate the behavior of a real high-voltage battery. That intended for the development and testing of mathematical algorithms and software for the control system of a high-voltage battery of a hybrid vehicle. The main features of the developed models are an imitation of the characteristics of the cells of a high-voltage storage battery with the ability to set the initial state-of-charge (SOC) and change the charge during the operation of the model. The data were used to develop and evaluate a mathematical model of a high-voltage storage battery cell. The operating result contributes to the acceleration of the software development process for electrical complexes and control systems for high-voltage batteries for hybrid vehicles.

Thermal Stability of Intermetallic Cu–Sn Interconnections for High Temperature Applications

2018 ◽  
Vol 15 (1) ◽  
pp. 35-40
Author(s):  
A. Novikov ◽  
M. Nowottnick
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Test Bench ◽  
Solder Joints ◽  
New Technology ◽  
Solder Paste ◽  
Special Test ◽  
Standard Alloy ◽  
Thermal Stability Of ◽  
Temperature Applications

New technology based on mixing of standard alloy SnCu in form of solder paste with copper paste was presented. This technology allows the production of solder joints with higher standoff consisting of intermetallic compounds. Such solder joints were qualified for high temperature applications by investigation of thermal stability of overlapped solder joints. For this purpose a special test bench for the investigation of remelting temperature up to 300°C was developed.

scholarly journals A novel FPGA-based test-bench framework for SDI stream verification

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Giuseppe Conti ◽  
Christos Kyrkou ◽  
Theocharis Theocharides ◽  
Gustavo Hernández-Peñaloza ◽  
David Jiménez
Keyword(s):  
Test Bench ◽  
Video Signal ◽  
Transport Layer ◽  
Protocol Verification ◽  
Practical Implementation ◽  
Digital Interface ◽  
Video Interface ◽  
Lab Test ◽  
Video Format ◽  
Input Test

Abstract This paper presents a framework for complete simulation and verification of Serial Digital Interface (SDI) video using a verilog test-bench and geared toward FPGAs. This framework permits simulating the entire process: from test video signal generation to protocol verification in the FPGA which implements the Device Under Test (DUT). The novelty in the design is the combination of a customized test video signal generator with an implementation clone of DUT transceiver for in-depth protocol debugging. Identical input test patterns of the video protocol under test are generated and fed to DUT for verification. Thus, the model not only permits to evaluate the SDI transport layer but also validates the implementation at ultra low pixel level of the video format. This approach provides two advantages: cost saving in terms of additional lab test equipment and delivering all-in-one test solution to verify design and implementation. A practical implementation using a test example of a macroblock processing chain using SDI video interface shows the viability of the proposed framework for video protocol testing.

scholarly journals GENERAL APPROACH TO DESCRIPTION OF NONLINEAR DYNAMICS INTERACTION ON THE BOUNDARY OF PHASES GAS-SOLID

2018 ◽  
Vol 1 (12) ◽  
pp. 97-100
Author(s):  
Ol'ga Sverdlova ◽  
Larisa Kondrat'eva
Keyword(s):  
Nonlinear Dynamics ◽  
Mathematical Models ◽  
Nonlinear Interaction ◽  
Gas Adsorption ◽  
Heterogeneous Surface ◽  
Practical Implementation

The article presents a possible approach to the description of the nonlinear interaction on the boundary of phases in gas-solid. The study of interaction involves the construction of interconnected mathematical models of the procedure for ranking elementary stages in order of importance and. calculating the speed of the process of gas adsorption on heterogeneous surface of the adsorbent. Submitted material should be seen as a statement of the general approach to the study of a model example that allows practical implementation on a computer.

scholarly journals CONTRIBUTION TO THE SPC IMPLEMENTATION BY SELECTING AN APPROPRIATE VARIABLE CONTROL CHART

2021 ◽  
Vol 24 (1) ◽  
pp. 50-54
Author(s):  
Mite Tomov ◽  
◽  
Leonard Abazovski ◽  
Anastasija Ignjatovska ◽  
◽  
...  
Keyword(s):  
Control Chart ◽  
Control Charts ◽  
Mean Value ◽  
Practical Implementation ◽  
Statistical Process ◽  
Serial Production ◽  
Variable Control ◽  
Percentage Difference ◽  
The Mean ◽  
Distribution Type

The research in this paper contributes to the practical implementation of the Statistical Process Control (SPC), primarily in the serial production by selecting an appropriate variable control chart. The paper proposes a procedure algorithm where the deciding criteria used to select the variable control chart include: the data distribution type (whether an approximately normal distribution or not), the number of elements in the subgroup (n) for grouped data, the shift size value and the percentage difference between the shift size value and the mean value of the shifts calculated for each subgroup. The paper explains the proposed algorithm using examples with appropriately drawn control charts, which algorithm essentially represents an extension of the algorithm presented in ISO 7870-2:2013.

scholarly journals The fitting of the viscous dampers to dampen the torsional vibration of the combustion engine’s crank shaft

2018 ◽  
Vol 19 (6) ◽  
pp. 482-485
Author(s):  
Celina Jagiełowicz-Ryznar
Keyword(s):  
Torsional Vibration ◽  
Test Bench ◽  
Damping Coefficient ◽  
Theoretical Formula ◽  
Damping Factor ◽  
Viscous Damper ◽  
Special Test ◽  
Viscous Dampers

The method of viscous damper fitting, on the base of damping factor of viscous torsion damper, was presented in this paper. The measurements of forced torsional vibration of measuring shaft with damper, on the special test bench are the basis of the method. According to the theoretical formula, including the results of the vibrations measuring, the damping coefficient was determined.

Analysis of Thrust Bearing Impact on Friction Losses in Automotive Turbochargers

2015 ◽  
Vol 137 (8) ◽  
Author(s):  
Bjoern Hoepke ◽  
Tolga Uhlmann ◽  
Stefan Pischinger ◽  
Bernhardt Lueddecke ◽  
Dietmar Filsinger
Keyword(s):  
Test Bench ◽  
Thrust Bearing ◽  
Journal Bearing ◽  
Special Test ◽  
Friction Power ◽  
Overall Efficiency ◽  
Center Section ◽  
Thrust Load ◽  
Bearing System ◽  
Bearing Friction

The importance of automotive turbocharger performance is continuously increasing. However, further gains in efficiency are becoming progressively difficult to achieve. The bearing friction losses impact the overall efficiency of the turbocharger and accordingly the understanding of bearing systems and their characteristics is essential for future improvements. In this work, a detailed analysis on the mechanical losses occurring in the bearing system of automotive turbochargers is presented. Friction losses have been measured experimentally on a special test bench up to rotational speeds of nTC = 130,000 1/min. Special interest was given to the thrust bearing characteristics and its contribution to the total friction losses. For this, the experiments were split into three parts: first, friction power was determined as a function of turbocharger speed at zero externally applied thrust load. Second, external thrust load up to 40 N was applied onto the turbocharger bearing at fixed rotational speeds of nTC = 40,000, 80,000, and 120,000 1/min. Increasing thrust load was observed to result in increasing friction losses amounting to a maximum of 32%. At last, a specially prepared turbocharger center section with deactivated thrust bearing was investigated. A comparison of these results with the measurement of the conventional bearing system under thrust-free conditions allowed separating journal and thrust bearing losses. The contribution of the thrust bearing to the overall bearing losses appeared to be as high as 38%. Furthermore, a modeling approach for estimating the friction power of both fully floating journal bearing as well as thrust bearing is illustrated. This theoretical model is shown to predict friction losses reasonably well compared to the experimental results.

APPLICATION OF VIRTUAL INSTRUMENTS TECHNOLOGY IN AN AUTOMATED TEST BENCH FOR MEASURING PARAMETERS OF AIR TRAFFIC CONTROL TRANSPONDERS

2021 ◽  
Author(s):  
П.И. СИМОНОВ ◽  
А.А. КОСТЮК ◽  
А.А. МАКАРЕНКО
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Test Bench ◽  
Air Traffic ◽  
Practical Implementation ◽  
Digital Instrumentation ◽  
Automated Test ◽  
Computer Based ◽  
Traditional Approaches ◽  
Measuring Bench

Дана оценка использования цифровой контрольно-измерительной аппаратуры при проверке авиационных систем в соответствии с руководящими документами ARP4754 и DO-178C. Указано, что в автоматизированных стендах на основе ЭВМ, в отличие от традиционных подходов, повышается роль программного обеспечения (ПО). Приведен обзор существующих ре -шений для проверки приемоответчиков управления воздушным движением (УВД). Сделан вывод о необходимости доработки автоматизированного измерительного стенда проверки бортовых систем предупреждения столкновений (БСПС) с целью оценки параметров приемоответчиков УВД на стадиях их разработки и проведения сертификационных работ в соответствии с DO-181E. Сформированы требования к ПО. Представлены результаты практической реализации автоматизированного измерительного стенда. An assessment of the use of digital instrumentation equipment for testing airborne systems under the guidelines ARP 4754 and DO-178C is given. It is shown that in the computer-based automated test bench, unlike traditional approaches, the importance of software increases. An overview of existing solutions for testing air traffic control (ATC) transponders is provided. It is concluded that it is necessary to refine the automated measuring bench for testing the airborne traffic collision avoidance systems (TCAS) to assess the parameters of ATC transponders at the stages of their development and certification under the guideline DO-181E. Software requirements are formed. The results of the practical implementation of an automated measuring stand are presented.

scholarly journals Management of high-tech production at a multilevel integrated enterprise using production flow standards (on the example of the aviation industry)

2021 ◽  
pp. 113-123
Author(s):  
A. M. Kovalev ◽  
O. A. Afanasieva
Keyword(s):  
Information Systems ◽  
Production Management ◽  
Virtual Enterprise ◽  
Machine Building ◽  
Aviation Industry ◽  
High Tech ◽  
Practical Implementation ◽  
Production Flow ◽  
Serial Production ◽  
Production Management System

A virtual enterprise providing various stages of production of complex machine-building products by a network of interacting organizations is considered. The imperfection of the production management system within the framework of a virtual enterprise of this type is noted and it is proposed to improve it with the help of non-traditional application of production flow standards (PFS), extending this concept to the virtual enterprise as a whole. The composition of production flow standards, both traditional and non-traditional, which should be formed in the information systems of organizations, forming a virtual enterprise, is given. The procedure for the formation of production flow standards in these information systems and the procedure for their use for managing serial production management are considered. Recommendations on methods for calculating non-traditional production flow standards are formulated. The main projects that determine the practical implementation of proposals for the non-traditional application of production flow standards are indicated. 

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