Simulation Analysis of the Influenced Motion from Ball Mass and Shape in Baseball Pitching

We call the ideal motion generated under the artificial environment like a computer "artificial proficient motion". This paper reports the simulation analysis for upper limb how influence is given to pitching motion from ball mass and shape by using the new simulation method for generating artificial proficient motion. The most important feature of our simulation method is that there is a mechanism of the process for obtaining the proficient motion on a computer. In this paper, at first, we have described the new computer simulation method of generating artificial proficient motion for upper limb during baseball pitching by using the 3-dimensional mathematical model and the optimizing method. Secondly, we have reported the simulation experiment and its consequences for investigating the influence from several types of a ball, in baseball, golf, American football, Basketball and etc., to the pitching motion on one's upper limb by applying our simulation method. From the consequences, we have been able to make clear the property of the influenced motion from ball mass and shape on one's upper limb in viewpoints of dynamics and kinematics.