摘要
通过深入研究周期图建模预报方法,分别采用数据交叠分段的方法和加窗函数的方法来对周期图进行平滑处理,最后综合数据交叠分段和加窗函数两种方法对周期图进一步改进.应用仿真方法,详细分析各种改进方法,确定合适的阈值及交叠率、合适的窗函数和相对应的阈值.改进后的周期图预报方法对船舶运动预报的预报精度更高,满足船舶运动实际应用需要,具有重要的实际应用价值.
Based on the deep study of methods of periodogram modeling and prediction, it adopts data overlaping section and the window function method to smooth periodogram. Finally the periodogram method is improved by integrating the above two methods. By simulation, it analyzes and studies various methods at large and finally concludes the appropriate threshold, overlapping ration, window function and relative threshold. The improved periodogram prediction methods have higher accuracy for ship motion prediction and meet the practical need of ship motion, with important practical application value.
出处
《船舶工程》
CSCD
北大核心
2011年第5期60-64,共5页
Ship Engineering
关键词
船舶运动
建摸预报
周期图
数据交叠分段
窗函数
ship motion modling
modeling and prediction
periodogram
data overlapping section
window function
