Bias-aware thermoacoustic data assimilation
Bias-aware thermoacoustic data assimilation
复制标题
偏差感知热声数据同化
DOI:
10.3397/in_2022_0271
复制
发表时间:
2023
期刊:
影响因子:
--
通讯作者:
L. Magri
中科院分区:
文献类型:
--
作者:
Andrea Nóvoa;A. Racca;L. Magri
Ensemble data assimilation algorithms combine experimental data and numerical models to estimate the state and parameters of a system. If the model is unbiased, the estimation concentrates around the true state. Thermoacoustic instabilities are, however, commonly modelled with low-order
models, which are biased by definition. We propose the introduction of reservoir computing to represent the model bias. We combine the ensemble square-root Kalman filter with an echo state network to perform, in real time, (1) the estimation of the state of the system, (2) parameter calibration,
and (3) model bias estimation. The proposed methodology is tested in a Rijke tube system, with synthetic experimental data from a high order model.