A15 Studies on the motion analysis of skiing turn using the measurement of joint angle and gliding velocity of skier

Abstract

This paper deals with the motion analysis of skiing turn using joint angle and gliding velocity of skier. The joint angle is calculated from the 3D orientation estimated using the information of the orientation measurement system. The gliding velocity is estimated from GPS receiver output, accelerometer output and 3D orientation. The measurement experiment has conducted by skier attached the measurement systems. The hip joint angle and the gliding velocity of skidding turn and carving turn have estimated by sensor fusion. The joint angle and the gliding velocity have indicated the difference motion on these turns. Furthermore, the motion analysis using both the joint angle and the gliding velocity has indicated the motion timing at switchover and change of turns. The result of motion analysis using the joint angle and the gliding velocity has obtained more major features than the results of motion analysis using each one. The proposed motion analysis method can be used to evaluate quantitatively the skill.