Signal processing algorithms for multichannel integrated engines complex diagnostics for automobiles and tractors

Trudy NAMI ◽  
2021 ◽  
pp. 6-15
Author(s):  
V. E. Tarasenko ◽  
O. Ch. Rolich ◽  
O. A. Yakubovich ◽  
A. V. Kozlov
Keyword(s):  
Real Time ◽  
High Performance ◽  
Residual Life ◽  
Technical Condition ◽  
Integrated System ◽  
Automotive Engine ◽  
Automotive Engines ◽  
Signal Processing Algorithms ◽  
Qualitative Determination

Introduction (problem statement and relevance). The technical state of machines undergoes changes during their life cycle. The qualitative determination of the technical condition of components, assemblies and systems of engines requires not only the application of modern control methods that provide reliable results, but also the use of high-performance specialized diagnostic equipment for the timely detection of faults to increase the reliability and service life of machines.The purpose of the study was to substantiate the architecture of an integrated system of vibroacoustic and thermal diagnostics, which would make it possible to assess the residual life of systems, assemblies and mechanisms of diesel engines in real time.Methodology and research methods. The modern methods of collection and computer processing of signals from various types of sensors, as well as wavelet functions and digital image processing were used in the study.Scientifi c novelty and results. Algorithms for calculating and processing the analytical ensemble (including scaleograms and histograms) of the data fl ow have been developed and used in an integrated system of complex diagnostics to identify defects in automotive engines and detect the moments of their origin.Practical signifi cance. The proposed algorithms made it possible to diagnose malfunctions and calculate the residual resource of automotive engine units in real time, display the dynamics of signal changes on the display, process user requests and form a protocol for changing the diesel state picture during its operation.

Examination of State of the Cable Insulation by the Return Voltage

2018 ◽  
Vol 19 (6) ◽  
Author(s):  
Dmitry Semenov ◽  
Anna Sidorova ◽  
Pavel Romanov ◽  
Aleksey Kuvshinov
Keyword(s):  
Residual Life ◽  
Technical Condition ◽  
Actual State ◽  
Power Cables ◽  
Insulation Resistance ◽  
Cable Lines ◽  
P Factor ◽  
Paper Insulation ◽  
New System

Abstract The relevance of the study is conditioned by the need to determine the state and residual life duration of high-voltage cable lines to identify faulty and maintainable cables. The aim of the article is to determine a reliable scientifically grounded criterion for assessment of insulation characteristics of the cables in use and to perform a comparative analysis of the results obtained by the traditional method of diagnosing insulation with the results of a new method of assessment by the return voltage. In this regard, the article deals with the issues related to the testing of cables having oil-impregnated paper insulation, as well as with the issue of switching from planned replacement of cables to assessment of their actual state and period of residual life. The authors propose to use the method of examining the cables by the return voltage using the device for testing electrical insulation “UDEI-1” developed at the department of Electrification and Automation of the Nizhny Novgorod State University of Engineering and Economics. The article presents the results of measuring the return voltage of three cables that operated under different conditions. The cables had different technical state. The analysis of the estimation of the residual life of cables by the return voltage was carried out using such criteria as the PIRV polarization index, the LIRV electrical conductivity index, and the P-factor. The P-factor is the physical criterion demonstrating the aging of paper-oil insulation by the shape of the return voltage curve. It represents such characteristics of insulation aging as moistening. To compare the results of testing the cables by the return voltage with the conventional methods of diagnostics and to determine the actual technical condition of power cables, the authors applied the method of spatiotemporal reflectometry and the method of measuring insulation resistance with the determination of such indicators of state as insulation resistance normalized per one kilometer, absorption coefficient, and polarization index. The results of this article confirm that the return voltage gives a qualitative assessment of the state and degree of aging of cables with impregnated paper insulation. The authors proposed a new system for evaluation of cable condition by weighting coefficients. In this approach, the determination of residual life of cables with impregnated paper insulation is based on the values of the return voltage. Application of the new system gives opportunity to improve reliability of the power lines. Recommendations for the further operation of the studied cables are given. The materials of the article are of practical value for carrying out complex assessment of the technical condition of power cables by the return voltage and can be useful for drawing up a schedule for replacement or repair of cable lines depending on their actual state.

High-performance flexible all-solid-state aqueous rechargeable Zn–MnO2 microbatteries integrated with wearable pressure sensors

2018 ◽  
Vol 6 (30) ◽  
pp. 14594-14601 ◽  
Author(s):  
Bing He ◽  
Qichong Zhang ◽  
Lianhui Li ◽  
Juan Sun ◽  
Ping Man ◽  
...  
Keyword(s):  
Solid State ◽  
Real Time ◽  
Health Monitoring ◽  
High Performance ◽  
Pressure Sensors ◽  
Integrated System

A self-powering, multifunctional, miniaturized integrated system was designed to achieve real-time health monitoring both statically and dynamically.

scholarly journals Selection of Method of Chemical Analysis in Measuring the Salinity of Mineral Materials

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 559
Author(s):  
Teresa Stryszewska ◽  
Marta Dudek
Keyword(s):  
High Performance ◽  
Salt Content ◽  
Technical Condition ◽  
Water Soluble ◽  
Aqueous Extracts ◽  
X Ray ◽  
Chloride Salts ◽  
Sulphate Salts ◽  
Selection Of

The article deals with the issue of salt content in brick buildings, which plays an important role in the assessment of the technical condition, in particular of historic buildings. A question has been asked about the selection of the best research method to determine the salinity of mineral materials. To obtain the answer, the authors conducted some tests on ceramic bricks salted with seven types of salt solutions. Research methods such as: spectrophotometry (UV), ion chromatography (High Performance Liquid Chromatography (HPLC)), X-Ray Fluorescence Spectrometry (XRF) and Energy-Dispersive X-Ray Spectroscopy (EDS) were compared. The above methods belong to two groups: the first is based on aqueous extracts and allows the determination of water-soluble salts, and the second concerns testing directly on the sample so that insoluble salts can also be determined. The results tests indicate that the methods based on solid phases (XRF and EDS) give higher salinity values than those based on aqueous extracts (HPLC and UV). The results were also analysed with regard to the type of salt. Larger differences are observed for sulphate salts while chloride salts are characterised by smaller differences. On this basis, it is concluded that the salt content of the material is best assessed using tests that make it possible to recognise the salt in question and its quantity.

scholarly journals Method for the diagnosis of high-voltage dielectric elements during operation based on dynamic registration of electromagnetic radiation

2020 ◽  
Vol 216 ◽  
pp. 01061
Author(s):  
Dmitry Ivanov ◽  
Tatyana Galieva ◽  
Marat Sadykov ◽  
Alexander Golenischev-Kutuzov ◽  
Anatoly Naumov
Keyword(s):  
High Voltage ◽  
Residual Life ◽  
Technical Condition ◽  
Time Of Arrival ◽  
Frequency Method ◽  
Diagnostic Parameters ◽  
Reliable Assessment ◽  
The Difference ◽  
The Moment

Complex remote monitoring and the developed non-contact diagnostic device (NDD) allow monitoring the technical condition and revealing the residual life of high-voltage dielectric elements. It is based on non-contact remote periodic measurement of a set of diagnostic parameters (characteristics of electrical discharges emitted by insulators during operation) necessary for a reliable assessment of the operating state of high-voltage dielectric equipment at the moment of operation and determination of its residual life. NDDs are installed on each phase conductor and used to measure diagnostic parameters, followed by computer processing of the accumulated information signals. An analysis of the set of necessary diagnostic parameters makes it possible to form a conclusion on the degree of performance of dielectric elements. The paper considers a method for detecting defective high-voltage insulators using the developed non-contact diagnostic devices by the radio frequency method and assessing the difference in time of arrival of a partial discharge signal.

VALIDATION OF THE QUALITATIVE DETERMINATION OF HPLC METODS FOR SUCROSE AND PEG-2000-DSPE IN A LIPOSOMAL FORM OF THE PHOTOSENSITIZER LIPOPHTHALOCYAN

2020 ◽  
pp. 241-244
Author(s):  
ANNA LANTSOVA ◽  
EKATERINA SANAROVA ◽  
MARIA DMITRIEVA ◽  
OLGA ORLOVA ◽  
NATALIA OBOROTOVA ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Statistical Parameters ◽  
Liposomal Form ◽  
True Value ◽  
Ich Guidelines ◽  
Coefficients Of Variation ◽  
Liquid Chromatographic ◽  
Qualitative Determination

Objective: This study was undertaken with the aim of the validate the simple isocratic metods high-performance liquid chromatographic (HPLC) for the estimation of PEG-2000-DSPE and sucrose in liposomal medicinal formulations of the phthalocyanine photosensitizer Lipophthalocyan. Methods: HPLC quantification was carried out by using of YMC-Pack Polyamine II column. The mobile phase (for sucrose: acetonitrile: water: ethyl acetate in the ratio of 450: 200: 20; for PEG-2000-DSPE: water in the ratio 10: 90) was pumped at a flow rate of 1 ml/min. Following the guidelines of the International Conference on Harmonization (ICH), the methods was validated for various analytical parameters like specificity, linearity, detection limit, quantitative limit, correctness, and accuracy. Results: The obtained results of the analysis were validated statistically. The correlation coefficient for the linearity was 0.999292, for sucrose, and 0.997650 for PEG-2000-DSPE. The methods can be assessed as correct, as the results obtained are close to the true value and the confidence interval for both methods include 100%. The coefficients of variation in both methods in determining the accuracy were less than 3%. Conclusion: The proposed HPLC methods were validated according to the ICH guidelines and results and statistical parameters demonstrated that the developed methods are sensitive, precise, reliable and simple for the estimation of PEG-2000-DSPE and sucrose in Lipophthalocyan.

The Effect of Spark Plug Electrode Geometry on Combustion Rates in a High Performance Automotive Engine

2013 ◽  
Author(s):  
Jeremy J. Worm ◽  
Jim McFarland ◽  
Forrest Jehlik ◽  
Paul W. Dice ◽  
Scott A. Miers
Keyword(s):  
High Performance ◽  
Electrode Geometry ◽  
Ignition Timing ◽  
Combustion Analysis ◽  
Transient Conditions ◽  
Automotive Engine ◽  
Automotive Engines ◽  
Spark Plug ◽  
Test Engine ◽  
Burn Rate

Spark plugs utilizing a J-wire electrode are standard in most automotive engines and have been for decades. However, innumerable alternative spark plug designs have been introduced. This paper examines the potential benefit of one particular alternative electrode geometry in a high-performance automotive engine. The alternative spark plug that is investigated is a commercially available aftermarket unit. The testing included detailed analysis of both brake and indicated parameters including MEP and burn rates. Testing was conducted under both steady state and transient conditions, and encompassed multiple induction systems and test fuels including E85. The test engine was a commercially available high performance aftermarket engine assembly intended for motorsports. This paper includes the optimal settings for ignition timing and lambda and the process by which those values were determined. The combustion analysis shows the alternative spark plug electrode resulted in an increased early burn rate, which in turn lead to an overall advancing of the combustion phasing. To better decouple combustion phasing effects from test to test variation on brake output parameters, an empirical model is developed and exercised. The model describes the expected change in brake output resulting from the shift in combustion phasing induced by the alternative spark plug geometry.

scholarly journals Methodology remaining lifetime determination of the building structures

2018 ◽  
Vol 230 ◽  
pp. 02023 ◽  
Author(s):  
Yuriy Otrosh ◽  
Andrii Kovalov ◽  
Oleg Semkiv ◽  
Irina Rudeshko ◽  
Valentin Diven
Keyword(s):  
Structural Damage ◽  
Residual Life ◽  
Technical Condition ◽  
Building Structures ◽  
Design Elements ◽  
Fixed Assets ◽  
Technical Examination ◽  
Effective Use ◽  
Technical Solutions

The paper proposes an approach to determining the increase of the normative lifetime of building structures on the basis of the algorithm of numerical calculation of the residual life of structures, which is performed on the basis of the results of defining parameters obtained during the technical examination and evaluation of defects, failures and structural damage. To calculate the structures, the simulation of the stressstrain state of the building structures with the involvement of OK LIRA was used. Simulation allowed performing optimization of technical solutions and strengthening of structures for buildings. The methodology is used to design elements for strengthening the structures of buildings and structures. Reliable estimation and forecasting of the technical condition enables to prevent the occurrence of accidents of structures and their associated losses, to use rational use of funds for current and capital repairs, and to regulate the technical condition in such a way as to achieve the most effective use of fixed assets.

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