摘要
本文应用自适应最小二乘格型(LSL)算法估计非恒定流压力脉动的功率谱密度。文中介绍了LSL算法的原理,通过实例计算非恒定流压力脉动的时变谱密度S(f,t),并用准平稳的傅氏法与最大熵法进行对比计算。还用恒定流压力脉动资料比较了傅氏法、最大熵法及LSL算法的谱估计性能。
This paper uses the adaptive least squares lattice algorithm (LSL) to calculate the spectral estimation of pressure fluctuations in unsteady flow, and describes the principle of the LSL algorithm. An example is given to calculate the time-varying spectral density S(f, t) of pressure fluctuations in unsteady flow. In addition, the quasi-stationary Fourier method and maximum entropy method are used in spectral estimation. Finally, the three algorithms are compared by using a set of data on pressure fluctuations in steady flow.
出处
《水力发电学报》
EI
CSCD
北大核心
1993年第1期55-63,共9页
Journal of Hydroelectric Engineering
