[논문]농업용트랙터 ROPS 시험의 신뢰성 향상을 위한 측정불확도 추정

임류갑; 강영선; 김택진

doi:10.7839/ksfc.2023.20.1.034

농업용트랙터 ROPS 시험의 신뢰성 향상을 위한 측정불확도 추정
Measurement Uncertainty calculation for improving test reliability of Agricultural tractor ROPS Test 원문보기

드라이브ㆍ컨트롤 = Journal of drive and control, v.20 no.1, 2023년, pp.34 - 40

임류갑 (Department of Smart Agriculture, Korea Agriculture Technology Promotion Agency) , 강영선 (Korea Agriculture Mechanization Policy Institute) , 김택진 (Department of Drive System Team, TYM R&D Center)

Abstract ▼ AI-Helper

The agricultural tractor ROPS test method according to OECD code 4 is a test to assess whether the driver's safety area can be secured when a tractor overturns, and reliability should be ensured. In this study, a model formula and procedure for calculating measurement uncertainty expressing reliability in the field of agricultural machinery testing were established according to the ISO/IEC Guide 98-3:2008. The characteristics of the ROPS test device were assessed and repeated tests were performed, and the were used as factors to calculate the measurement uncertainty. As a result of repeated tests, the accuracy was higher than 1.9 % in all load directions; thus, they were, applied to calculate the type A standard uncertainty. The final expanded uncertainty was calculated within the range of less than ± 7.76 kN of force and ± 6.96 mm of deformation in all load directions.

주제어

표/그림 (12)

그림 Fig. 1 A photo of roll over protective structure (ROPS) loading test device
그림 Fig. 2 A photo of data acquisition sensor for roll over protective structure (ROPS) loading test device
표 Table 1 Specification of tractor with ROPS used in this study
그림 Fig. 3 A photo of data acquisition sensor for roll over protective structure (ROPS) loading test
그림 Fig. 4 A photo of tractor replacement structure and test bed
그림 Fig. 5 Procedure of measurement uncertainty calculation
그림 Fig. 6 Relative standard deviation of force and deformation for ROPS repeat test
표 Table 2 Mean and standard deviation for ROPS repeat test result
표 Table 3 Calibration and resolution for test device
표 Table 4 Calculation of standard uncertainty and degree of freedom
표 Table 5 Calculation of combined standard uncertainty
표 Table 6 Calculation of expanded uncertainty

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