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Tytuł:
Tool path planning for five-axis end milling of cycloidal gears and its full tooth profile accuracy measurement
Autorzy:
Wang, Jian
Liao, Longxing
Luo, Shanming
Mo, Jingyu
Powiązania:
https://bibliotekanauki.pl/articles/38890069.pdf
Data publikacji:
2023
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
cycloidal gear
end milling
five-axis CNC machine tool
tooth path planning
full tooth profile accuracy measurement
Opis:
This paper proposes a method of end milling of cycloidal gears using a five-axis computer analytical control (CNC) machine tool. Firstly, the basic principle of the five-axis end milling of cycloidal gears is introduced. The cutting characteristics of the ball-end and the flat-end cutters are analyzed. Secondly, the path planning method of the five-axis end milling of cycloidal gears is researched. A curvature matching method is used to check for local over-cut interference and a minimum distance method is used to check for global collision interference. These two interferences are avoided by calculating the feasible range of cutter orientations and adjusting the dips of cutter shafts. Tests of end milling of cycloidal gears are carried out using a ball-end cutter and a flat-end cutter, respectively. Finally, full tooth profile accuracy measurements are undertaken with an image-measuring instrument to assess the quality of cycloidal gears processed in this way. This study provides a theoretical basis for the improvement of the tooth profile accuracy and surface quality of cycloidal gears.
Źródło:
Engineering Transactions; 2023, 71, 1; 3-21
0867-888X
Pojawia się w:
Engineering Transactions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative accuracy analysis of triangulated surface models of a fossil skull digitized with various optic devices
Autorzy:
Garashchenko, Yaroslav
Kogan, Ilja
Rucki, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2052109.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Madygenerpeton
optical measurement
triangulated model
polygonal analysis
accuracy
Opis:
Digital metrology was applied for evaluate 3D models of the unique skull of a fossil tetrapod, Madygenerpeton pustulatum, generated using various 3D digitization methods. The skull surface is covered by minute tubercles making it challenging for digitization with appropriate accuracy. Uniqueness and fragility of the specimen preclude the use of tactile measuring systems for creating a standardized reference model. To overcome this problem, comparative analysis of the triangulated models generated from the clouds of points obtained with seven different devices was conducted using the Geomagic Studio and Autodesk PowerShape CAD software. In the proposed approach, geometrically and dimensionally closest-fitting models underwent detailed statistical analysis between surface polygons in three steps. First, 3D models obtained from different scanning methods were compared with each other in couples. Next, statistical analysis of the differences between the coupled models was performed. Finally, a rating list of the models related to the required accuracy was prepared. The proposed approach is applicable to any other scanned object, especially in palaeontological applications, where each object is unique and exhibits individual features.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 37-51
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of the measurement system in a production organization
Analiza systemu pomiarowego w przedsiębiorstwie produkcyjnym
Autorzy:
Prístavka, Miroslav
Findura, Pavol
Beloev, Ivan
Kuboń, Maciej
Hrdá, Veronika
Kovalyshyn, Stepan
Shchur, Taras
Powiązania:
https://bibliotekanauki.pl/articles/2204298.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
accuracy of measurement device
repeatability
reproducibility
przyrząd pomiarowy
sprawność
powtarzalność
odtwarzalność
Opis:
Monitoring the accuracy of meters by qualified workers and managers is a preventive measure of every organization. The paper focuses on monitoring the accuracy of measuring devices and proposes preventive and corrective actions. The discussed measurement device was tested for accuracy using accuracy indexes Cg and Cgk. The identified deviations in measurements showed that the meter was not fully efficient. Consequently, actions were taken to ensuring that the measurement device is accurate.
Monitorowanie sprawności mierników to działanie prewencyjne każdej organizacji. Pracownicy działów jakości oraz osoby odpowiedzialne za kontrolę i pomiary wyrobów końcowych są zobowiązani do ciągłej kontroli sprzętu pomiarowego. W artykule skupiono się na monitorowaniu dokładności przyrządu pomiarowego oraz zaproponowaniu działań zapobiegawczych i korygujących. Dokładność przyrządu pomiarowego określono za pomocą wskaźników dokładności Cg i Cgk. Stwierdzono, że odchylenia w pomiarach świadczą o tym, że miernik nie jest w pełni sprawny. W związku z tym podjęto działania naprawcze, które zapewniły sprawność przyrządu pomiarowego.
Źródło:
Agricultural Engineering; 2022, 26, 1; 81--90
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie skaningu laserowego i chmur punktów na budowie. Część I
The use of laser scanning and point clouds on the construction site. Part I
Autorzy:
Nowak, Paweł
Rosłon, Jerzy
Romatowski, Karol
Powiązania:
https://bibliotekanauki.pl/articles/2142035.pdf
Data publikacji:
2022
Wydawca:
Polski Związek Inżynierów i Techników Budownictwa
Tematy:
skaning laserowy
pomiar laserowy
dokładność pomiaru
budowa
innowacja
inwentaryzacja
roboty zanikające
zbrojenie
chmura punktów
projekt europejski
ERASMUS+
CLOEMC V
laser scanning
laser measurement
measurement accuracy
construction site
innovation
inventory
concealed works
reinforcement
point cloud
European project
Opis:
Seria czterech artykułów przedstawia wykorzystanie chmur punktów oraz skaningu laserowego na budowie. Dzięki zastosowaniu skanowania laserowego można rozwiązać wiele zagadnień inżynierskich i optymalizacyjnych. W pierwszym artykule przedstawiono podstawowe informacje na temat skanerów laserowych oraz ich działania. Wyjaśniono, co wpływa na dokładność pomiarów instrumentami skanującymi i w jaki sposób odbywa się skanowanie. Przedstawiono także zagadnienie związane z wykorzystaniem skanerów do inwentaryzacji robót zanikowych i zakrywanych (zbrojenie i instalacje).
A series of four articles covers the use of point clouds and laser scanning on site. Thanks to the use of laser scanning, many engineering and optimization issues can be solved. The first article presents basic information about laser scanners and their operation. It explains what influences the accuracy of measurements with scanning instruments and how the scanning is performed. The issue related to the use of scanners for inventory of decaying and covered works (reinforcement and installations) is also presented.
Źródło:
Przegląd Budowlany; 2022, 93, 5-6; 34--43
0033-2038
Pojawia się w:
Przegląd Budowlany
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CellProfiler and WEKA Tools: Image Analysis for Fish Erythrocytes Shape and Machine Learning Model Algorithm Accuracy Prediction of Dataset
Autorzy:
Talapatra, Soumendra Nath
Chaudhuri, Rupa
Ghosh, Subhasis
Powiązania:
https://bibliotekanauki.pl/articles/1193348.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Automatic image analysis
CellProfiler tool
Fish erythrocytes quantification
Machine learning algorithm
Model classifier accuracy
Shapes measurement
WEKA tool
Opis:
The first part of the study was detected the number of cells and measurement of shape of cells, cytoplasm, and nuclei in an image of Giemsa-stained of fish peripheral erythrocytes by using CellProfiler (CP, version 2.1.0) tool, an image analysis tool. In the second part, it was evaluated machine learning (ML) algorithm models viz. BayesNet (BN), NaiveBayes (NB), logistic regression (LR), Lazy.KStar (K*), decision tree (DT) J48, Random forest (RF) and Random tree (RT) in the WEKA tool (version 3.8.5) for the prediction of the accuracy of the dataset generated from an image. The CP predicts the numbers and individual cellular area shape (arbitrary unit) of cells, cytoplasm, and nuclei as primary, secondary, and tertiary object data in an image. The performance of model accuracy of studied ML algorithm classifications as per correctly and incorrectly classified instances, the highest values were observed in RF and RT followed by K*, LR, BN and DTJ48 and lowest in NB as per training and testing set of correctly classified instances. In case of performance accuracy of class for K value, the highest values were observed in RF and RT followed by K*, LR, BN and DTJ48 and lowest in NB while lowest values were obtained for mean absolute error (MAE) and root mean squared error (RMSE) in case of RT followed by RF, K*, LR, BN and DTJ48 and comparatively highest value in case of NB as per training and testing set. In conclusion, both tools performed well as an image to the dataset and obtained dataset to rich information through ML modelling and future study in WEKA tool can easily be analysed many biological big data to predict classifier accuracy.
Źródło:
World Scientific News; 2021, 154; 101-116
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NTC thermistor nonlinearity compensation using Wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC
Autorzy:
Jovanović, Jelena
Denić, Dragan
Powiązania:
https://bibliotekanauki.pl/articles/1849001.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge
Opis:
NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NTC thermistor nonlinearity compensation using wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC
Autorzy:
Jovanović, Jelena
Denić, Dragan
Powiązania:
https://bibliotekanauki.pl/articles/1849099.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge
Opis:
NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NTC thermistor nonlinearity compensation using Wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC
Autorzy:
Jovanović, Jelena
Denić, Dragan
Powiązania:
https://bibliotekanauki.pl/articles/1849139.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge
Opis:
NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geodetic Activity for Compatibility of the Unit of Length of Geodetic Bases Koštice (Czech Republic) and Javoriv (Ukraine)
Badania geodezyjne zgodności jednostek długości baz geodezyjnych Koštice (Republika Czeska) i Jaworów (Ukraina)
Autorzy:
Trevogo, Igor Sevirovic
Lechner, Jiří
Tora, Barbara
Cernota, Pavel
Stankova, Hana
Powiązania:
https://bibliotekanauki.pl/articles/318834.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
geodezja
metrologia
dokładność pomiaru
identyfikacja metrologiczna
podstawa długości geodezyjnej
geodesy
metrology
measurement accuracy
metrological traceability
geodetic length base
Opis:
The paper deals with geodetic and metrological activities in the field of length parameter, on the basis of which the uniformity and accuracy of measurements and gauges are ensured also in international extent. The historical role of surveyors in determining the basic unit of length is briefly described. Furthermore, the impact of the application of the laser tracker on the accuracy of determination of the characteristics of the geodetic length standard Koštice (Czech Republic) is evaluated. Based on laboratory tests performed in VUGTK and interlaboratory comparative tests with a leading laboratory in the length parameter in Veisala (Finland), the declared uncertainties of measurement of the VUGTK laboratory were confirmed. These are applied in the metrological traceability of the geodetic length base in Javoriv (Ukraine).
Artykuł dotyczy badań geodezyjnych i metrologicznych w zakresie określenia parametru długości, na podstawie których zapewniona jest równoważność i dokładność pomiarów w wymiarze międzynarodowym. Opisano krótko historyczną rolę geodezji w określaniu podstawowych jednostek długości. Omówiono wpływ zastosowania analizy laserowego na dokładność oznaczania długości geodezyjnej w miejscowości Koštice (Republika Czeska). Na podstawie badań laboratoryjnych przeprowadzonych w VUGTK i międzylaboratoryjnych testów porównawczych z wiodącym laboratorium pod względem parametru długości w Veisala (Finlandia), potwierdzono deklarowaną niepewność pomiaru w laboratorium VUGTK. Przedstawiono wyniki pomiarów geodezyjnych w analizie metrologicznej pomiarów geodezyjnych w Jaworowie (Ukraina).
Źródło:
Inżynieria Mineralna; 2020, 1, 1; 35-40
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of straightness and verticality of sheet piling
Autorzy:
Kokoszka, Wanda
Ochab, Piotr
Gardzińska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/396753.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
special construction
technological chamber
sheet piling
measurement of straightness
verticality measurement
accuracy analysis
konstrukcja specjalna
komora technologiczna
ścianki szczelne
pomiar prostoliniowości
pomiar pionowości
analiza dokładności
Opis:
Sheet piling is commonly used in various areas of special construction. Embedded in the ground before carrying out excavation works, sheet piling constitutes an enclosure and protection for the designed excavation. It is a temporary enclosure and protection for excavations made for communication structures, launch shafts built for microtunnel construction, etc. In order to assess the quality of the engineering works related to the construction of sheet piling, measurements were made of straightness and verticality of the sheet piling used for the technological chambers. The measurements concerned two technological chambers of 7.2 and 6.4 m height. Inventory measurements were made using a total station of 1” accuracy and a leveling staff with the appliance of the socalled projection method. The two technological chambers were built in the investment area called “Infrastructure construction for rainwater drainage, water supply and sanitary sewage collection from the John Paul II International Airport Kraków-Balice.”
Źródło:
Civil and Environmental Engineering Reports; 2020, 30, 3; 281-294
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test of Vibrations Influence on the Measurement Accuracy in the Precise Digital Leveller Trimble Dini 03 And Comparison of its Vibration Sensitivity with Leveller Ni 002
Autorzy:
Kurnatowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1838066.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
vibrations
measurement accuracy
precise levelling
leveller digital
drgania
dokładność pomiaru
poziomowanie
niwelator cyfrowy
Opis:
The article presents findings from research on the effect of vibrations on the accuracy of measurement with an automatic precise digital leveller. A special research station was created to induce vibrations on a leveller and to measure vibration parameters that affect staff reading. It contains description of discovered relationship between the vibration parameters and the mean error of a single height difference measurement. The range of frequencies for which the measurement was possible was estimated. The reliability of the measured values obtained under specific vibration conditions was also analysed. The results of current research were compared with similar studies on analogue leveller Ni 002. The conclusions described in this paper can be helpful in engineering measurements under adverse conditions of ambient vibrations.
Źródło:
Civil and Environmental Engineering Reports; 2020, 30, 4; 112-124
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Influence of Sample Averaging on Accuracy of Point Coordinates Measurement Performed Using Laser Tracking Systems
Autorzy:
Gruza, Maciej
Gąska, Piotr
Gąska, Adam
Harmatys, Wiktor
Jedynak, Michał
Kobiela, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/102134.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Laser Tracker
measurement uncertainty
accuracy
niepewność pomiaru
dokładność
Opis:
Laser Tracking systems are commonly used in all branches of industry, which requires accurate large-scale measurements for instance aviation, space and shipbuilding industries. Laser Trackers belong to the group of non-Cartesian Coordinate Measuring Systems. Determination of the measured point coordinates involves the measurements of distance using laser beam and two angles recorded by horizontal and vertical encoders. Additionally, the environmental conditions are monitored and used for compensation of measured distance. The coordinates of single measured point are estimated using the results obtained from a series of samples taken in a short time period. The average value obtained from a sample is given as a result; additionally, the dispersion parameters are calculated which can be used to evaluate the probing process. This paper presents the research procedure which allows assessing the influence of chosen dispersion parameter related to the sample averaging on accuracy of the measurements performed with laser tracking devices. The procedure involves standard elements measurements during which the points with similar level of RMS parameter are used for the calculation of the measurement result. Such approach allows simulating the increasing dispersion of points taken into account during sample probing. The results presented in the article can be helpful to the operators of laser tracking systems to assess the influence of the probing process on the measurement accuracy.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 94-99
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of environmental and operating conditions on the verification interval for smart electronic electricity meters
Autorzy:
Radej, Blaž
Drnovšek, Janko
Begeš, Gaber
Powiązania:
https://bibliotekanauki.pl/articles/220382.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
smart meter
verification interval
measurement accuracy
measurement error
accelerated aging
Opis:
According to metrological guidelines and specific legal requirements, every smart electronic electricity meter has to be constantly verified after pre-defined regular time intervals. The problem is that in most cases these pre-defined time intervals are based on some previous experience or empirical knowledge and rarely on scientifically sound data. Since the verification itself is a costly procedure it would be advantageous to put more effort into defining the required verification periods. Therefore, a fixed verification interval, recommended by various internal documents, standardised evaluation procedures and national legislation, could be technically and scientifically more justified and consequently more appropriate and trustworthy for the end user. This paper describes an experiment to determine the effect of alternating temperature and humidity and constant high current on a smart electronic electricity meter’s measurement accuracy. Based on an analysis of these effects it is proposed that the current fixed verification interval could be revised, taking into account also different climatic influence. The findings of this work could influence a new standardized procedure in respect of a meter’s verification interval.
Źródło:
Metrology and Measurement Systems; 2019, 26, 1; 171-184
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement strategy as a determinant of the measurement uncertainty of an optical scanner
Autorzy:
Koteras, Robert
Wieczorowski, Michał
Znaniecki, Piotr
Swojak, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/94194.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
coordinate measuring machine
optical scanner
measurement strategy
accuracy of measurement
Opis:
The subject of the article is an attempt to determine the impact of the applied measurement strategy on the accuracy of the measurement result. This problem is particularly crucial when measuring large objects. In these cases, it is not always possible to provide ideal conditions for the submission of particular scans. It is necessary to adjust the strategy to specific imposed conditions defined by the geometry of the object and to the time frame of the measurement itself. With regard to the above, an attempt was made to carry out a series of accuracy studies testing the structural light scanner while measuring elements of overall dimensions greater than the measuring capacity of the scanner. At the same time, various potential measuring strategies were simulated in practical applications. Our studies were conducted using a pre-designed test template with a defined distribution pattern of reference points and geometrical elements. Moreover, in order to make an in-depth investigation of the issue, some trials were undertaken with the use of limiting parameters. That means the scanner had both an excess and shortage of information required for a correct assembly of scans. Those scopes were taken into consideration in the study in order to use the acquired knowledge in practical measuring applications. Furthermore, conclusions from the conducted studies indicate peaks and troughs of respective measuring strategies with special care for determining relationships among the used strategies and the measuring accuracy parameters.
Źródło:
Archives of Mechanical Technology and Materials; 2019, 39; 26-31
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring instruments used at the research and accuracy of defining the efficiency of drive systems
Autorzy:
Skorek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/246257.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy efficiency
accuracy
measurements
measurement results
measuring instruments
Opis:
The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems thanks to the use of high quality sensors and measuring instruments. The types of measuring instruments used on the test stand are presented. The results of experimentally determined efficiencies and simulationally determined efficiencies of two hydrostatic systems with throttling control were compared, which are fed with a constant capacity pump. The choice of the analysed systems is not accidental. There is still a view in the literature about limited possibilities of energy systems with proportional control. The research stand was very carefully designed and made. The applied measuring instruments were characterized by high accuracy of measurements. The issues related to the determination of energy losses and energy efficiency of the engine or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. For laboratory verification, measurement methods were developed, the test stand was adapted and automated. It consists of tested system and loaded system. The measurements during the tests were saved on the computer disk. In order to be able to compare the efficiency of the overall system with the efficiency obtained on the basis of the simulation, coefficients ki determining the energy losses of individual elements of the system were calculated. The research showed a large convergence of the mathematical description of energy losses in the elements of the system and the efficiency of the system with reality. The mathematical model enables accurate simulation determination of the energy efficiency of the system at each point of its field of operation, i.e. at each speed and load of the controlled hydraulic motor. The range of motor speed and load variation can also be accurately determined simulationally.
Źródło:
Journal of KONES; 2019, 26, 2; 129-135
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 80

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