The design and development of an arm crank machine using fuzzy logic control for multi-handicapped youths with mental retardation

• Main Authors: Jen-Tsang Hung, 洪振滄
• Other Authors: Jiann-Shing Shieh
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/56572778274232916839

碩士 === 元智大學 === 機械工程學系 === 90 === In this study, we try to cope with National Special School in Taoyuan in order to fit the special requirements for multi-handicapped youths with mental retardation using current high technology, such as microcomputer control, sensing technology, and fuzzy logic control. The prototype device of this study is focused on designing an arm crank system, which is suitable exercise for the upper limb. The current of the brake from this device was a biofeedback signal in order to control the rate of the arm crank exercise. Hence, a fuzzy logic controller (FLC) was compared with a manual control by an expert (i.e., physical therapist). Fifteen multi-handicapped youths with mental retardation were treated using manual control as a control group, and another fifteen youths were treated using FLC as an experimental group. The root mean square deviation (RMSD) of rate of arm crank was no significant difference (p > 0.05) using Student t test analysis. It means that FLC can be replaced the manual control by the qualified physical therapist. Therefore, it can be seen as a demonstration of feasibility of the applicability of this FLC for monitoring and control the velocity of the arm crank. But, it still needs a longer series of multi-handicapped youths with mental retardation, perhaps to refine the rule-bases, and certainly to see how widely they are applicable.