226 Studies on the dynamic motion analysis of snowboard turns by the measurement of snowboarder gliding on the actual snow field

Abstract

This paper deals with the dynamic motion analysis using joint torques of snowboarder gliding on the actual snow field. The joint torque is estimated by applying the sensor fusion and the closed-loop inverse dynamics to the information of motion measurement systems. The motion measurement system that consists of inertial and magnetic field sensors measures 3-axis angular velocity, 3-axis acceleration and 3-axis magnetic field. The results indicate the optimal joint torque in gliding of the snowboarder. The measurement experiment was conducted by the snowboarder gliding on the actual snow field. The motion measurement systems were attached to the body segments of snowboarder. The snowboarder conducted periodical carving turn. The results of motion analysis by the joint torque indicated the major motion features of snowboarder gliding on the actual snow field. Therefore, the results can be used to clarify the important joint torques in snowboard turns and to evaluate the skill of snowboarder.