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Time measurement on different balls rolling down a slop
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2017 ASABE Annual International Meeting 1700505.(doi:10.13031/aim.201700505)
Authors: Laiquan Luo, Liangdong Liu, Decheng Wang, Xiaopeng Bai, Dingding Li, Xingwei Gu, Chenchen Kang
Keywords: orthogonal experiment, analyze, MANOVA
Abstract. This report presents the process of experimental design and the analysis of the results. The experiment measures the time for different balls rolling down a slope of a variety of angles and surfaces. An orthogonal experiment was adopted to optimize the experimental design. Multiple analysis of variance (MANOVA) was applied to analyze the experiment data. The result shows that the four variables including balls, slope angles, slope materials and initial velocities all impact the rolling time significantly, of the four variables the initial speed is the most significant one. The experiment design can be divided into the 4 parts of experiment assumption and variables selection, experiment installation, data collection and data analysis. At the end of the report, the limitations and recommendations of the experiment are discussed as well as the advantages and disadvantages of this experiment.
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