基于有限傅立叶级数法的浮标测波算法研究

Research on Wave Measurement Algorithm of Buoy Based on Finite Fourier Series Method

摘要:

针对精确测量波浪参数的问题，研究了波浪浮标测波算法。该算法对浮标采集的波浪运动速度谱进行带通滤波，进而对波浪速度谱和方向波谱进行处理和分析，最终通过有限傅立叶级数法计算波浪的有效波高、跨零周期和谱峰波向。通过模拟仿真和湖上对比测试，验证了算法的有效性和准确性，测量相对误差维持在 2%~10%范围内。该算法可应用于装载 GPS 或北斗定位模块的波浪浮标中，具有较广阔的应用前景。

关键词:有限傅里叶级数法;波浪浮标;波浪测量

Abstract:

Aiming at the problem of accurately measuring wave parameters，this paper studies the wave measurement algorithm of the buoy. The algorithm performs band-pass filtering on the wave motion velocity spectrum collected by the buoy，and then processes and analyzes the wave velocity spectrum and direction spectrum， and finally calculates the effective wave height，zero-crossing period and spectrum direction of the wave by the finite Fourier series method. Through simulation and comparison tests on the lake，the effectiveness and accuracy of the algorithm are verified，and the relative measurement error was maintained in the range of 2%~10%. The algorithm can be applied to wave buoys loaded with GPS or Beidou positioning module，and has a broad application prospect.

Key words:finite Fourier series method;wave buoy;wave measurement