小波变换在水下航行体出水动响应识别中的应用

在出水过程中，由于空泡溃灭作用，水下航行体结构存在较大的横向弯曲动态响应，内部结构间存在相对运动，当响应较大时有可能发生干涉。本文应用小波变换方法，根据加速度测量数据对水下航行体出水过程中的动态响应进行了辨识，并与试验结果进行了对比分析。小波分析具有良好的时一频定位特性以及对信号的自适应能力，能对信号的高频、短时成分准确地在时域和频域中进行分析。这为水下航行体加速度信号处理提供了有效的分析手段。

The application of wavelet transform in the exiting-water dynamic response identification of underwater vehicles

In the exiting-water progress, outstanding dynamic responses exist in the structures of the underwater vehicle under the action of cavity collapse. There are relative motions in the inner structures and interference happens possibly. Wavelet transform is applied in this paper to identify the dynamic response of the underwater vehicle in the exiting-water progress based on the measured acceleration data. The results are compared with the experimental data. It shows that wavelet transform has a good time-frequency locating character and a self-adaptive ability to signals. Wavelet transform is able to analyze the high-frequency and short-time parts of signals accurately in the time and frequency domain, which gives a powerful means for structure dynamic response identification.