Research on Body Type Correction of FINA Diving Difficulty Coefficient Based on Rigid Body System

Abstract

In order to reduce the influence of athlete’s body shape on the difficulty coefficient of diving, a more reasonable calculation method of body shape correction coefficient is proposed based on the original calculation rules of diving difficulty coefficient. First, the composition of the original diving difficulty coefficient and influencing factors is analyzed and the relationship between the various structural parts is fully clarified. Second, a coupled nonrigid body dynamics model is established and a 2-body model is used to simulate complex diving actions, and it is concluded that diving time is positively correlated with body shape. Finally, the air movement part and the water entry part of diving are discussed separately, the calculation model of the difficulty coefficient of body shape correction is established, and the original difficulty coefficient is corrected. The results show that the difficulty coefficient of each movement is obviously increased. This effectively avoids the influence of body shape on the diving difficulty coefficient.

Modeling and simulation of fall process dynamics based on a simplified human body model

“…Ishigaki, Taiki integrates dynamics computation and control of hybrid multi-link systems with rigid and soft bodies, providing a low computational cost approach to the study of robotics [8] . Zhang, Su studied the effect of athlete size on the difficulty coefficient of diving using a kinetic model [9] . Chen, Jian-Hua establishes the nodal angle equation to analyze the joint loading effect of human lower limb walking gait in the support phase through multi-rigid body [10] .In this paper, the Kane method is used to establish the dynamic equations of the di-rigid body human model, set the human inertia parameters and joint moments, and simulate the human fall process.…”

A Stretchable and Self-Healing Hybrid Nano-Generator for Human Motion Monitoring

“…The larger the wedge angle, the higher the wave height of the free liquid surface and the greater the splash [ 5 , 6 ]. Therefore, athletes must change their hands into a square shape immediately before entering the water [ 7 ]. In other words, athletes need to complete this technology according to the direction of rotation, the folding speed of the palms, and the orientation of the palms.…”