The Design and Simulation of Swimming Training Device on Freestyle Stroke

• Main Authors: Lien, Kuo-Lin, 連國霖
• Other Authors: Cheng, Pi-Ying
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/73254998482403009026

碩士 === 國立交通大學 === 機械工程系所 === 102 === Swimming is a quite healthy sport, but there are many problems needed to overcome during the learning process. If we can let people familiar with the movements of swimming through a training mechanism in advance, people can have better efficiency in learning swimming in water. In freestyle swimming, there are 70% of main propulsive forces is applied by arms. Through the analysis of the swimming movements of many excellent athletes, we found that most of them use S-shape stroke and I-shape stroke, and the S-shape stroke is more beneficial to bring efficient force in sculling process, but hard to control. This study reports the standard sculling trajectory and the assessments by biomechanics method, and the design of a functional training mechanism for the novices or redressing the posture for swimmers. This study is consist of four main subject, respectively are: (1) Editing 3D trajectory in animation software 3ds Max、(2) simulating tension of muscle in biomedicine software OpenSim、(3)designing sculling training mechanism and (4) deriving mechanism kinetics. We employ animation software to editing 3D trajectory, and refer to the trajectory of the freestyle champion to establish standard trajectory. Then, we use biomedicine software to calculate the static tension of muscle in moving process, and verify if the established movement in animation software is appropriate or not. According to designing process of this study, we complete the mechanism conforming to expectation of standard swimming posture by controlling the trajectory of the forearm. This study assesses the samples of S-shape stroke and I-shape stroke. In the analysis of mechanism, we check and remove the interferences by institutional dynamic simulation. We calculate the displacement angles by Inverse kinematics, verify the degree of freedom of the mechanism, and afford the applications of drive controller and plan by the displacement angles.