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Wyszukujesz frazę "Calibration" wg kryterium: Temat


Tytuł:
An investigation on using the falling mass technique for dynamic force calibrations
Autorzy:
Gelany, Shaker A.
Mahmoud, Gouda M.
Tematy:
calibration
dynamic calibration
impact force
falling weight
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/1849008.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consistent Estimation of Cross-Classified Domains
Autorzy:
Lumiste, Kaur
Tematy:
Consistent estimation
calibration
AC-calibration
repeated weighting
Pokaż więcej
Wydawca:
Główny Urząd Statystyczny
Powiązania:
https://bibliotekanauki.pl/articles/466094.pdf  Link otwiera się w nowym oknie
Opis:
Domain estimation has become an important area in survey sampling, however a lot of problems associate with it. One out of many is the lack of consistency between different surveys. The results of one survey do not coincide with the results of another survey done earlier or simultaneously, although the same variable is under study. We study two methods, AC-calibration (A – auxiliary, C – common) and repeated weighting (RW), for achieving consistency. A short overview of these two methods is given, and we develop formulas for a specified case, for the crossclassified domains. We assume that there are two sources of information on the study variables (either surveys or registers). The problem is that one source has information on domains formed by certain categorical variable, not considered or not identified in the other source. Instead, this second source has information on domains formed by another categorical variable. We are however interested in domains cross-classified with these categorical variables. A survey is done regarding these new domains, but the domain estimates will probably be inconsistent with marginal information, from earlier surveys. We require that the new domain estimates be consistent with the marginals. To achieve this we apply AC-calibration or repeated weighting. The formulas of AC-calibration and RW for the cross-classified domains are tested in a simulation study. Simulations were done on a population composed of real data from the Estonian Household Survey.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An investigation on using the falling mass technique for dynamic force calibrations
Autorzy:
Gelany, Shaker A.
Mahmoud, Gouda M.
Tematy:
calibration
dynamic calibration
impact force
falling weight
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/1849097.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An investigation on using the falling mass technique for dynamic force calibrations
Autorzy:
Gelany, Shaker A.
Mahmoud, Gouda M.
Tematy:
calibration
dynamic calibration
impact force
falling weight
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/1849140.pdf  Link otwiera się w nowym oknie
Opis:
In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Autokalibracja torów pomiarowych poprzez interpolację funkcji przetwarzania za pomocą liniowych funkcji sklejanych
Self-calibration of measurement channels by means of linear spline interpolation of conversion function
Autorzy:
Gawędzki, W.
Tematy:
kalibracja
autokalibracja
czujniki
interpolacja
calibration
self-calibration
sensors
interpolation
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/156420.pdf  Link otwiera się w nowym oknie
Opis:
W artykule zaproponowano pewną metodę kalibracji toru pomiarowego wielkości nieelektrycznych poprzez wyznaczanie czułości łącznej. Pokazano sposoby implementacji algorytmów autokalibracji dla różnych rodzajów torów pomiarowych w zależności od typu funkcji przetwarzania czujnika wielkości nieelektrycznych. Rozpatrzono często stosowane czujniki z wyjściem stosunkowym (czujniki zintegrowane, układy mostkowe), w których wielkość mierzona jest przetwarzana na stosunek napięcia wyjściowego czujnika do jego napięcia zasilania. Uwzględniono przy tym przypadki liniowej i nieliniowej funkcji przetwarzania toru pomiarowego. Przyjęto interpolację funkcji przetwarzania za pomocą liniowych funkcji sklejanych. Pokazano przykład implementacji algorytmu autokalibracji.
In the paper certain method is proposed, concerning calibration of a channel for measurements of non-electrical quantities, by means of total sensitivity evaluation. The implementation ways of self-calibration algorithms are shown, for different types of measurement channels, depending on the type of conversion function of non-electrical quantity sensor. Frequently used sensors with ratio output have been examined (integrated sensors, bridge circuits), in which a measurand is converted to a ratio of sensor output voltage to its supply voltage. The cases of linear and non-linear conversion function of a measurement channel have been taken into consideration. The interpolation of conversion function has been realized with linear spline functions. An example of implementation of self-calibration algorithm is shown.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancing laser step diagonal measurement by multiple sensors for fast machine tool calibration
Autorzy:
Dahlem, P.
Montavon, B.
Peterek, M.
Schmitt, R. H.
Tematy:
machine tool calibration
step diagonal measurement
integrated calibration system
Pokaż więcej
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:
https://bibliotekanauki.pl/articles/99640.pdf  Link otwiera się w nowym oknie
Opis:
The volumetric performance of machine tools is limited by the remaining relative deviation between desired and real tool tip position. Being able to predict this deviation at any given functional point enables methods for compensation or counteraction and hence reduce errors in manufacturing and uncertainties for on-machine measurement tasks. Time-efficient identification and quanitification of different contributions to the resulting deviation play a key role in this strategy. The authors pursue the development of an optical sensor system for step diagonal measurement methods, which can be integrated into the working volume of the machine due to its compact size, enabling fast measurements of the axes’ motion error including roll, pitch and yaw and squareness errors without significantly interrupting the manufacturing process. The use of a frequency-modulating interferometer and photosensitive arrays in combination with a Gaussian laser beam allow for measurements at comparable accuracy, lower cost and smaller dimensions compared to state-of-the-art optical measuring appliances for offline machine tool calibration. For validation of the method a virtual machine setup and raytracing simulation is used which enables the investigation of systematic errors like sensor hardware misalignment.
Dostawca treści:
Biblioteka Nauki
Artykuł

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