DYNAMIC ANALYSIS OF FORKLIFT TRUCK OVERTURMING EVENTS AND DESIGN CE

• Main Authors: Dav-Fount Liu, 劉德芳
• Other Authors: Chang-Huei Wu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/56224915539042038636

碩士 === 元智大學 === 機械工程研究所 === 83 === The goal of this research is aimed at first to investigate the mechanism of vehicle overturning under various road and operation conditions. Secondly,a warning device is designed based on the result of dynamic analysis, loading condition and fuzzy logic such that as the loading condition and the status of vehicle motion approach marginal condition of overturning, the warning device can send a signal to the driver to avoid potential danger. Based on the results of dynamic analysis, the prime factors affect the overturning of forklift trucks include the loading condition, road slope,acceleration, turning rate and braking force. We defined a safety index based on the location of equivalent mass center, and designed a micro- computer based warning device equipped with sensors to measure the operation condition and a set of fuzzy logic to deal with the possible effect of braking in the future while the vehicle is running at high speed. These information are then weighted and combined together for graphical display as well as alarming sound to the driver in real-time. The effectiveness and reliability of this scheme is verified by computer simulation.A more complete and realistic computer simulation combining nonlinear vehicle dynamics and warning device is currently under development, we expect the simulation results can provide valuable information for future design modifications of the warning device.