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Tytuł:
An installation angle error calibration method in an Ultra-Short Baseline system based on a dual transponder
Autorzy:
Liu, Baoheng
Zhang, Xiaochuan
Jia, Shuyang
Zou, Sichen
Tian, Deyan
Da, Lianglong
Powiązania:
https://bibliotekanauki.pl/articles/32921617.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
USBL
installation angle error
misalignment calibration
numerical algorithm
hydrolocation
Opis:
The installation error of an acoustic transceiver array is one of the important error sources in an ultra-short baseline (USBL) system. In a USBL system with a positioning accuracy of 0.5%, an installation error angle of 1 will lead to a positioning error of 1.7% times the slant distance. In this paper, a dual transponder-based installation angle error calibration method for USBL is proposed. First, the positioning errors induced by various installation angles are deduced and analysed using the linear measurement of seafloor targets. Then, an iterative algorithm is proposed that estimates the rolling alignment error, pitching alignment error, and heading alignment error, in that order. The simulation and experienced results show that, after three iterations, the estimates of the three alignment errors can converge quickly, all of the estimates converge to within 0.001 and the estimated values are very close to the true values. The horizontal positioning error caused by the installation error angle can be reduced by nearly 75%. The method has good effectiveness and robustness, and can greatly improve the positioning accuracy of the USBL system.
Źródło:
Polish Maritime Research; 2023, 2; 121-129
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of self-leveling table for FFF additive technology
Autorzy:
Coranič, Tomáš
Ružbarský, Juraj
Krenický, Tibor
Maščeník, Jozef
Powiązania:
https://bibliotekanauki.pl/articles/27323744.pdf
Data publikacji:
2023
Wydawca:
STE GROUP
Tematy:
additive technologies
calibration
Arduino
structural design
technologie addytywne
kalibrowanie
projekt konstrukcyjny
Opis:
The presented paper describes the conceptual design of a worktable intended mainly for use in combination with FFF additive technologies, calibrated using a gyroscope and accelerometer. The proposed system is based on a programmable Arduino platform that operates with three digital servomotors and a mechanical gyroscope. In the introduction, the theoretical assumptions, and definitions of basic concepts such as a gyroscope, electric motor, and RC servomotor are described. Subsequently, the contribution is devoted to the selection of suitable components, the schematic connection, and the design itself in the Autodesk Inventor program. In the conclusion, the anticipated benefits of using the technical solution when applied in FFF additive technologies are described.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2023, 12, 2; 109--117
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving efficiency of corn seed separation and calibration process
Poprawa wydajności procesu separacji i kalibracji nasion kukurydzy
Autorzy:
Bredykhin, Vadym
Tikunov, Stanislav
Slipchenko, Maksym
Alfyorov, Oleksiy
Bogomolov, Alexey
Shchur, Taras
Kocira, Sławomir
Kiczorowski, Piotr
Paslavskyy, Rostysav
Powiązania:
https://bibliotekanauki.pl/articles/16539631.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
calibration process
seed material
separating machine
sieve
separator performance
open area
proces kalibracji
materiał nasienny
maszyna separująca
sito
wydajność separatora
powierzchnia otwarta
Opis:
The paper analyzes the existing theoretical research of corn seed separation and calibration processes. The machines, tools and equipment that implement the process were studied. An innovative sieve with openings in the Cassini oval shape was proposed for the economical separation and calibration of corn seeds. The results of operation of the proposed sieve in the operating conditions of Kharkiv Feed Mill on BSH-100 serial separators were considered. The study of the effectiveness of sifting corn seeds through the holes of the sieves was carried out in partnership with the State University “Ukrainian Research Institute of Forecasting and Testing of Agricultural Production Techniques and Technologies named after Leonid Pohorily” (Kharkiv Branch). The use of sieves with openings in the Cassini oval shape, instead of classic circular base openings, was found to result in an increase in throughput capacity of the sieve and open area of up to 20%.
Niniejsza praca przedstawia analizę istniejącego badania teoretycznego nad separacją nasion kukurydzy i procesu kalibracji. Maszyny, narzędzia oraz wyposażenie, które są wykorzystywane w tym procesie zostały przestudiowane. Zaproponowano innowacyjne sito z otworami o kształcie owalu Cassiniego do ekonomicznej separacji i kalibracji nasion kukurydzy. Przeanalizowano wyniki działania zaproponowanego sita w warunkach pracy młyna paszowego w Charkowie na seryjnych separatorach BSH -100. Badanie efektywności przesiewania ziaren kukurydzy przez otwory w sicie przeprowadzono we współpracy z Państwowym Uniwersytetem “Ukraińskim Instytutem Badawczym ds. przewidywania i badania technik i technologii produkcji rolniczej im. Leonida Pohorily” (Odział w Charkowie). Zastosowanie sit z otworami o kształcie owalu Cassiniego w miejsce tradycyjnych otworów o okrągłej podstawie wpłynęło na zwiększenie wydajności sita i otwartej powierzchni aż do 20%.
Źródło:
Agricultural Engineering; 2023, 27, 1; 241--253
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On representativeness, informative sampling, nonignorable nonresponse, semiparametric prediction and calibration
Autorzy:
Eideh, Abdulhakeem
Powiązania:
https://bibliotekanauki.pl/articles/14781728.pdf
Data publikacji:
2023-03-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
calibration
representative measure
response distribution
nonignorable nonresponse
informative sampling esign
Opis:
Informative sampling refers to a sampling design for which the sample selection probabilities depend on the values of the model outcome variable. In such cases the model holding for the sample data is different from the model holding for the population data. Similarly, nonignorable nonresponse refers to a nonresponse mechanism in which the response probability depends on the value of a missing outcome variable. For such a nonresponse mechanism the model holding for the response data is different from the model holding for the population data. In this paper, we study, within a modelling framework, the semi-parametric prediction of a finite population total by specifying the probability distribution of the response units under informative sampling and nonignorable nonresponse. This is the most general situation in surveys and other combinations of sampling informativeness and response mechanisms can be considered as special cases. Furthermore, based on the relationship between response distribution and population distribution, we introduce a new measure of the representativeness of a response set and a new test of nonignorable nonresponse and informative sampling, jointly. Finally, a calibration estimator is obtained when the sampling design is informative and the nonresponse mechanism is nonignorable.
Źródło:
Statistics in Transition new series; 2023, 24, 2; 93-111
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel base strain sensitivity measurement system with steady harmonic excitation
Autorzy:
Ye, Chuwei
Powiązania:
https://bibliotekanauki.pl/articles/2173901.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
base strain sensitivity
piezoelectric accelerometer
steady harmonic excitation
calibration
Opis:
Considering the low accuracy and low efficiency of the traditional calibration method for base strain sensitivity of accelerometers, a novel base strain sensitivity calibration system with steady harmonic excitation is proposed. The required cantilever beam for calibration is driven by an electromagnetic exciter to generate a base strain varying in a steady harmonic pattern. By applying a Wheatstone bridge circuit, the generated strain with low distortion can be measured. The measurement system with a compensation function can automatically calibrate the base strain sensitivity. The amplitude linearity and frequency response characteristics of the base strain sensitivity in two accelerometers are obtained experimentally, and the uncertainty in the results is 2% ( = 2).
Źródło:
Metrology and Measurement Systems; 2022, 29, 4; 751--762
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An improved algorithm for the series step-up method based on a linear three-ports network
Autorzy:
Liu, Hao
Chen, Lixue
Wang, Xue
Yao, Teng
Gu, Xiong
Powiązania:
https://bibliotekanauki.pl/articles/2106422.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
voltage transformer
traceability method
calibration
high voltage
Opis:
Capacitive leakage and adjacent interference are the main influence sources of the measuring error in the traditional series step-up method. To solve the two problems, a new algorithm was proposed in this study based on a three-ports network. Considering the two influences, it has been proved that response of this three-ports network still has characteristics of linear superposition with this new algorithm. In this threeport network, the auxiliary series voltage transformers use a two-stage structure that can further decrease measurement uncertainty. The measurement uncertainty of this proposed method at 500/√3 kV is 6.8 ppm for ratio error and 7 μrad for phase displacement ( k = 2). This new method has also been verified by comparing its results with measurement results of the PTB in Germany over the same 110/√3 kV standard voltage transformer. According to test results, the error between the two methods was less than 2.7 ppm for ratio error and 2.9 μrad for phase displacement.
Źródło:
Metrology and Measurement Systems; 2022, 29, 2; 301--313
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of development tendencies of metrological technologies to control rangefinders of an electronic distance measurement instruments
Autorzy:
Burachek, Vsevolod
Khomushko, Dmytro
Tereshchuk, Oleksiy
Kryachok, Sergíy
Belenok, Vadim
Powiązania:
https://bibliotekanauki.pl/articles/43852820.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
kalibrowanie
dalmierz
błąd pomiaru odległości
calibration
rangefinder
electronic distance measurement
reference linear station
root mean square
error distance measurement
Opis:
The article analyses the development of metrological control technologies for electronic distance measurement rangefinders to determine their main characteristic of accuracy – the root mean square error of distance measurement. It is established that the current reference linear bases are reliable and serve as the main means of transmitting a unit of length from the standards to the working means of measuring length. The article describes the existing linear reference bases and specifies their accuracy and disadvantages. It is concluded that the disadvantages of linear reference bases are deprived of the reference linear bases built in special laboratories. They use distances measured by the differential method with laser interferometers as reference distances. The application of such technology allowed to automate the processes of measurements and calculations. There is development of fibre-optic linear bases, in which optical fibres of known length are used as model lines. The article offers a new technical solution – a combination of fiber-optic and interference linear bases, which allows to qualitatively improve the system of metrological support of laser rangefinders. This is achieved by having a fiber-optic unit, which allows you to create baselines of increased length, while ensuring small dimensions of the baseline, and relative interference base, which provides high accuracy of linear measurements and does not require calibration of the base with a precision rangefinder, which eliminates several difficulties associated with changes in the refractive index, makes measurements independent of the wavelength of the radiation source and almost independent of the ambient temperature.
Źródło:
Advances in Geodesy and Geoinformation; 2022, 71, 1; art. no. e13, 2022
2720-7242
Pojawia się w:
Advances in Geodesy and Geoinformation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration and validation of a macroscopic traffic flow model based on platoon dispersion and queue propagation
Autorzy:
Storani, Facundo
di Pace, Roberta
de Luca, Stefano
Memoli, Silvio
Powiązania:
https://bibliotekanauki.pl/articles/2173484.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
network signal setting design
cell transmission model
platoon
dispersion model
calibration
validation
projekt ustawienia sygnału sieciowego
model transmisji komórki
pluton
model rozproszenia
kalibracja
walidacja
Opis:
This paper proposes a preliminary calibration and validation of a macroscopic traffic flow model for signalised junctions. In fact, on the network signal setting design problem, a reliable modelling approach must be adopted to acknowledge the traffic flow effects, considering two phenomena: queue dispersion and spillback. The proposed model is an extension of the space-time discrete Cell Transmission Model (CTM), which can simulate dispersion and horizontal queue. This preliminary calibration and validation use real-world data collected on an arterial of the city of Salerno (south of Italy). Results showed that the estimated parameters are consistent with the literature.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 114; 155--167
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration of micro-simulation model in assessment of passenger car exhaust emission during acceleration
Autorzy:
Nowak, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/2097650.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
exhaust emission
simulation
vehicle acceleration
model calibration
acceleration dynamics
emisja spalin
symulacja
przyspieszenie pojazdu
kalibracja modelu
dynamika przyspieszenia
Opis:
In terms of simulation research, it is important to simulate real conditions as precisely as possible. This type of approach makes it possible to minimize the error in the obtained results. The dynamics of acceleration is one of the most important factors having a direct impact on fuel consumption and exhaust emissions from vehicles. The work was carried out with the use of PTV Vissim microscopic vehicle motion simulation software. The considerations were carried out on theoretical acceleration profiles with different dynamics values and the actual character of acceleration, recorded during road tests. The simulations were carried out for a car powered by spark-ignition and compression-ignition engines. The research showed that the calibration of the acceleration character of the vehicle in simulation tests may result in significant differences in obtained results of exhaust emissions.
Źródło:
Combustion Engines; 2022, 61, 2; 54--59
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration of reference torque transducer in one direction and use of its cubic coefficients in both directions with improved interpolation error
Autorzy:
Khaled, K. M.
Osman, Seif M.
Powiązania:
https://bibliotekanauki.pl/articles/2173893.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
torque
calibration
fitting function
clockwise
counterclockwise
Opis:
The current research work presents an investigation into use of the fitting coefficients resulting from the cubic curve fitting of the torque transducer calibration results in one direction to calculate the actual torque in the other torque direction with two methods: one is direct substitution with the nominal torque which gives a propagated linear relative interpolation error and the other is changing the sign of the second coefficient in the cubic function when using in the other torque direction. This proposed modification improves the absolute relative interpolation error by 5 to 16 times in the clockwise and counterclockwise directions based on the torque transducer’s classification.
Źródło:
Metrology and Measurement Systems; 2022, 29, 3; 539--551
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of semi-automated calibration system for pressure balances
Autorzy:
Türk, Ahmet
Hamarat, Abdullah
Durgut, Yasin
Powiązania:
https://bibliotekanauki.pl/articles/2173904.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
semi-automated calibration
pressure balance
digital manometer assisted method
Opis:
In this study, a digital manometer was used as a transfer standard to perform calibration of a pneumatic pressure balance. The same pressure balance was calibrated with the cross-floating method based on falling rate determination (FRD). Average of differences among the effective area results show an agreement of less than 10 ppm between the digital manometer-assisted calibration (DMAC) method and the FRD method. The method in which a digital pressure gauge is used as a transfer standard not only facilitates calibration but also enables the automation of pressure balance calibration. Full automation of pressure balance calibration requires an automatic mass loading system for both the reference instrument and the device under test. Since there is a lot of different kinds of pressure balances, it is nearly impossible for a pressure metrology laboratory to have an automatic mass-handler system for every type of pressure balance. Therefore, a more efficient way in which automated mass-handler systems are not required .., a semi-automatic calibration system, is designed. For that purpose, two different calibration procedures, increasing-decreasing cycles, and pressurize-vent (P-V) procedures are performed and compared. The equivalence of procedure results makes the semi-automated calibration design of pressure balances possible. The most distinguishing advantages of a semi-automated calibration system are the applicability to any type of pressure balance and low cost compared to full automation.
Źródło:
Metrology and Measurement Systems; 2022, 29, 4; 623--638
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of annoyance due to wind turbine noise based on pre-learned patterns
Autorzy:
Felcyn, Jan
Preis, Anna
Gogol, Robert
Powiązania:
https://bibliotekanauki.pl/articles/24201941.pdf
Data publikacji:
2022
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
survey
in-situ study
laboratory experiment
calibration procedure
ankieta
badanie in situ
eksperyment laboratoryjny
procedura kalibracji
Opis:
Annoyance due to wind turbine noise is usually assessed on the basis of surveys conducted among people living in the vicinity of turbines or in the laboratory conditions. Due to the fact that the latter are very different from natural conditions, we propose a solution to reduce this difference. Prior to the surveys, 50 participants were asked to familiarize themselves with 5 environmental signals. They were informed about the annoyance rating assigned to each signal (obtained earlier in laboratory conditions), expressed as a number between 0 (not annoying signal) and 10 (extremely annoying signal). Participants were then presented with new environmental sounds and asked to rate the annoyance caused by each sound, in accordance with the previously learned method. The analysis of our results shows that the variability of answers given by respondents at their homes is similar to those obtained earlier in laboratory conditions.
Źródło:
Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022310
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of new designed reference blocks for calibration and NDT by optical and ultrasonic techniques
Autorzy:
Barakat, Mirham A.Y.
Abdelwahab, Mohamed
Abdallah, Alshaimaa Waheed
Powiązania:
https://bibliotekanauki.pl/articles/2173897.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
calibration
reference blocks
ultrasonic
displacement measuring interferometer
DMI
Opis:
Reference blocks are required for ultrasonic calibration and non-destructive testing (NDT). There are already in existence sets of reference blocks constructed according to American Society for Testing and Materials standards, but as the industry evolves, we need more reference blocks with varied designs. In this study, two reference blocks of steel and aluminum are constructed. These blocks have several sets of flat bottom holes (FBH) with different diameters (0.5, 1, 1.5, 2 and 2.5 mm), angles (45° and 90°) and placements. The novel constructed reference blocks are evaluated using the ultrasonic and a displacement measuring interferometer (DMI). They allow for detailed FBH characterization in terms of defining their location, diameter, depth and so on. The two techniques show consistency in the majority of the outcomes. The expanded uncertainty of readings is found to be ±1.4 μm, according to DMI data. The findings show that the newly constructed blocks could be ideal for evaluating a variety of calibration factors including transducer sensitivity, dead zone, defect size, and depth. Furthermore, they can be used in NDT in various industries such as petroleum pipe production, steel manufacturing and so on.
Źródło:
Metrology and Measurement Systems; 2022, 29, 4; 719--736
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of velocity and acceleration effect on mecanum wheel robot positioning
Autorzy:
Bączyk, Aleksander
Wojtowicz, Przemysław
Klekiel, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2174213.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
robot
kalibracja
pomiar optyczny
mecanum wheel
calibration
optical measurements
Opis:
In this paper, a Mecanum wheel omnidirectional robotic platform made for taking measurements in harsh and dangerous conditions is introduced. Due to the necessity of highly accurate displacement of the platform for measuring the conditions at the exact measurement point and due to known Mecanum wheel slippage and relatively poor position accuracy, a calibration procedure for minimizing positioning error had to be implemented. For this task, a highly accurate stereographic digital image correlation (DIC) system was used to measure platform displacement. A series of parameters, namely linear maximum velocity and acceleration/deceleration values, were taken into account during the calibration procedure to find the best combination allowing precise movement of the robot. It was found that low acceleration values were the main causes of the robot’s poor positioning accuracy and could cause the robot’s motors to stall. Max speed values proved to have little effect on the robot’s positioning.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 3; 22--35
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extreme Rainfall-Runoff Events Modeling Using HEC-HMS Model for Oued El Hachem Watershed, Northern Algeria
Autorzy:
Haddad, Ali
Powiązania:
https://bibliotekanauki.pl/articles/31340348.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
dam safety
HEC-HMS model
hydrologic modeling
model calibration
rainfall-runoff
arid region
Opis:
Flood forecasting has become necessary for dam management during extreme hydrological events. The lack of streamflow data in ungauged watersheds of arid and semi-arid regions makes the assessment of water resources difficult. In this paper, the Hydrologic Modeling System developed by the Hydrologic Engineering Center (HEC-HMS) was applied to the Oued El Hachem watershed. Calibration and validation of the model have been performed, taking into account the lag time and the curve number CN that is expressed as a function of soil group, land use and antecedent runoff condition. The model was evaluated on the basis of the coefficient of determination, the Nash Sutcliffe Efficiency (NSE), and the percentage differences between peak and volume. Performance indices of calibration showed a good agreements between observed and computed flows. The validation of the model has given satisfactory results. The calibrated model can be used to manage the dam of Boukerdane during extreme rainfall events by forecasting the induced hydrographs from which adequate procedures will be operated in order to ensure the safety of the dam against possible overtopping.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2022, 69, 1; 45-57
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
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