Orloff K L, Snyder P K
Appl Opt. 1982 Jan 15;21(2):339-44. doi: 10.1364/AO.21.000339.
Laser Doppler anemometers (LDAs) that are arranged to measure nonorthogonal velocity components (from which orthogonal components are computed through transformation equations) are more susceptible to calibration and sampling errors than are systems with uncoupled channels. In this paper uncertainty methods and estimation theory are used to evaluate, respectively, the systematic and statistical errors that are present when such devices are applied to the measurement of mean velocities in turbulent flows. Statistical errors are estimated for two-channel LDA data that are either correlated or uncorrelated. For uncorrelated data the directional uncertainty of the measured velocity vector is considered for applications where mean streamline patterns are desired.
与具有非耦合通道的系统相比，用于测量非正交速度分量（通过变换方程计算正交分量）的激光多普勒风速仪（LDA）更容易受到校准和采样误差的影响。本文采用不确定度方法和估计理论，分别评估了此类装置应用于湍流平均速度测量时存在的系统误差和统计误差。对相关或不相关的双通道LDA数据估计了统计误差。对于不相关数据，在需要平均流线模式的应用中考虑测量速度矢量的方向不确定性。
