摘要
窗函数设计在振动故障诊断、噪声处理等舰船工程领域有重要价值。针对Cosh窗性能特点,提出了一种新的组合改进方法,一方面增强了Cosh窗的旁瓣抑制能力,另一方面扩大了组合改进窗函数的适用范围。改进后的窗函数表达式简单,计算量较小。试验证明,新窗函数应用于舰船电机振动信号频谱分析,与Cosh窗函数对比,可使能量泄漏大大减少,频率分辨性能更高。
The window function design plays important role in many ship engineering fields, such as vibration fault diagnosis and noise processing. Pointing against the characters of the Cosh window, a new combination improvement was proposed. It performs much better side lobes, and expands the application field of the combination windows. The expression of the new window function is simple with lower cost of computation than many competitors. The ship cabin model experiment indicated that the proposed window had better frequency resolution and less leakage in spectral analysis,compared with the Cosh window.
出处
《舰船科学技术》
北大核心
2013年第2期57-59,共3页
Ship Science and Technology
