Citation

Song J. Trans. Kor. Soc. Automot. Eng. 2022; 30(6): 447-456.

Vernacular Title

실도로 주행에서 고도 데이터 정확도 향상을 위한 고도 표준화 방법

Copyright

(Copyright © 2022, Korean Society of Automotive Engineers)

DOI

10.7467/KSAE.2022.30.6.447

PMID

unavailable

Abstract

In a vehicle driving test, altitude data is used to determine elevation gain and calculate driving resistance. However, altitude data acquired from GPS has the disadvantage of low accuracy and missing data. This study proposed altitude standardization in order to increase the accuracy and interpolate the missing data. The altitude was recorded during 20 driving tests on the same route. All the data were accumulated based on latitude and longitude, and the missing data was interpolated by using the smoothing spline method. Positive cumulative elevation gain with high reliability was obtained by using only the altitude data from three driving tests. The accuracy of the standardized altitude was confirmed through driving resistance analysis. Meanwhile, driving resistance was used to calculate engine efficiency. The results showed that the engine efficiency calculated using the individual altitude was unrealistic, whereas the engine efficiency calculated using the standard altitude was constant at 35 %. This indicates that the standard altitude was correctly interpolated.

키워드: 도로 구배, 실도로 배기측정, 양의 누적 고도 상승, 고도 표준화, 주행저항

Language: ko