High-Accuracy Coastdown Test Method by Distance-Time Measurement: I. Theoretical Background and Discussions on Accuracy Improvements

거리·시간 측정에 의한 고정도 타행시험법 : I. 관련이론 및 정밀도 향상방법 고찰

A coast down test mothod has been used to determine the resistance forces on running vehicle due to the aerodynamic drag, rolling resistance and driveline resistance. Most of the tests, however, are based on the Velocity-Time measurements, which require a sophisticated velocity measuring device and contain much error by nature. In the present study a coast down test method based on Distance-Time measurements is introduced, which contains the original idea of Russian scientist Prof. Petrushov along with the suggestions for improvement of the accuracy.