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应用科学学报

• 论文 • 上一篇    

小波变换在人-板系统动测方法中的应用

王 俊1 汪凤泉1 李枝军1 周星德2
  

  1. 1．东南大学 土木工程学院，江苏 南京，210096

    2．河海大学 土木工程学院，江苏 南京,210098

  • 收稿日期:2004-10-17 修回日期:2005-06-02 出版日期:2006-01-31 发布日期:2006-01-31

Application of Wavelet Transformation to Dynamic Measurement of Men-Board System

WANG Jun1 WANG Feng－quan1, Li Zhi－jun1，ZHOU Xing－de2
  

  1. 1. Institute of Civil Engineering, Southeast Universit, Nanjing 210096, China;
    2. Institute of Civil Engineering, Hohai University, Nanjing 210098, Chian
  • Received:2004-10-17 Revised:2005-06-02 Online:2006-01-31 Published:2006-01-31

摘要： 首先利用离散小波分解信号，对时频小波变换相关算法进行改进，只对能量集中的低频逼近信号进行相关估计，避免了高频干扰，从而推算出运动员的离板时刻及起跳加速度和速度。然后对跳水板建立冲击响应谱，提出了运动员获得最大起跳效果的蹬伸条件。实验分析结果表明，本文提出的方法能有效评估运动员的起跳状态，为跳水训练提供了依据，具有较强的可行性和实用性。

关键词: 小波, 相关, 跳板跳水, 起跳, 冲击响应谱

Abstract: In order to acquire the starting condition of a springboard diver from the response curve, discrete wavelet transform is used to decompose the signal. A correlation algorithm based on time-frequency analysis is improved to estimate only the low frequency relative coefficients of similar signals which contains most energy. The moment of take-off can be caught, and the jumping acceleration and velocity are obtained. Moreover, shock spectrum of the board is figured out to obtain optimum pressing condition. Experimental results indicate that the method can be used to evaluate the jumping skill, which is useful in the training.

Key words:

wavelet, correlation, springboard diving, jumping, shock spectrum