On statistical estimations of vehicle speed measurements

• Autorzy: Skeivalas Jonas , Paršeliūnas Eimuntas , Putrimas Raimundas , Šlikas Dominykas

Identyfikatory

DOI

10.24425/mms.2019.129583

• Języki publikacji: EN

Abstrakty

EN

The accuracy of vehicle speed measured by a speedometer is analysed. The stress on the application of skew normal distribution is laid. The accuracy of measured vehicle speed depends on many error sources: construction of speedometer, measurement method, model inadequacy to real physical process, transferring information signal, external conditions, production process technology etc. The errors of speedometer are analysed in a complex relation to errors of the speed control gauges, whose functionality is based on the Doppler effect. Parameters of the normal distribution and skew normal distribution were applied in the errors analysis. It is shown that the application of maximum permissible errors to control the measuring results of vehicle speed gives paradoxical results when, in the case of skew normal distribution, the standard deviations of higher vehicle speeds are smaller than the standard deviations of lower speeds. In the case of normal distribution a higher speed has a greater standard deviation. For the speed measurements by Doppler speed gauges it is suggested to calculate the vehicle weighted average speed instead of the arithmetic average speed, what will correspond to most real dynamic changes of the vehicle speed parameters.

Słowa kluczowe

EN

vehicle speed; speedometer; maximum permissible error; skew normal distribution; errors

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2019
• Tom: Vol. 26, nr 3
• Strony: 551--559
• Opis fizyczny: Bibliogr. 33 poz., tab., wykr., wzory

Twórcy

autor

Skeivalas Jonas

• Vilnius Gediminas Technical University, Faculty of Environmental Engineering, Saulètekio 11, LT-10223 Vilnius, Lithuania

autor

Paršeliūnas Eimuntas

• Vilnius Gediminas Technical University, Faculty of Environmental Engineering, Saulètekio 11, LT-10223 Vilnius, Lithuania

autor

Putrimas Raimundas

• Vilnius Gediminas Technical University, Faculty of Environmental Engineering, Saulètekio 11, LT-10223 Vilnius, Lithuania

autor

Šlikas Dominykas

• Vilnius Gediminas Technical University, Faculty of Environmental Engineering, Saulètekio 11, LT-10223 Vilnius, Lithuania

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).