| Project/Area Number |
13555066
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Dynamics/Control
|
|---|
| Research Institution | Saitama Institute of Technology |
|---|
Principal Investigator |
KAWAZOE Yoshihiko Saitama Institute of Technology, Engineering, Professor (00102898)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KANAYA Keiji Saitama Inst. Tech., Engineering, part-time lecturer (90161166)
SATO Fuminori Mizuno Inc., Research division, Head Researcher
|
|---|
| Project Period (FY) |
2001 – 2003
|
| Project Status |
Completed (Fiscal Year 2003)
|
| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥3,100,000 (Direct Cost: ¥3,100,000)
|
|---|
| Keywords | Tennis / Sports Engineering / Tennis Racket / Impact / Restitution Coefficient / Shock Vibrations / Feel / Tennis Elbow |
|---|
| Research Abstract |
The terms used in describing the performance of a tennis racket are based on the feel of an experienced tester or player. However, the optimum racket depends on the physical and technical levels of each user. Accordingly, there are a number of unclear points regarding the relationship between the performance estimated by a player and the physical properties of a tennis racket. This research investigated a computer aided prediction and estimation system for racket performance in tennis considering player's individuality or play style. This system is based on the experimental identification of the dynamics of ball-racket-arm system and the approximate nonlinear impact analysis with a simple swing model. It can predict the various factors associated with the frontal impact, such as impact force, contact time, deformation of ball and strings, and also estimates the racket performance such as the coefficient of restitution, the rebound power coefficient, the post-impact ball velocity and the racket stability as well as the sweet areas using a small computer. It is also able to predict and estimate the wrist joint shock vibrations during forehand stroke when the impact velocity and the impact location on the racket face are given. The predicted results could explain well the mechanism of difference in performance between the various rackets with different physical properties.
|
