Parameter Estimation with Improved Model Prediction for Over-Parametrized Nonlinear Systems
Parameter Estimation with Improved Model Prediction for Over-Parametrized Nonlinear Systems
复制标题
超参数化非线性系统的参数估计和改进的模型预测
DOI:
10.1016/j.compchemeng.2021.107601
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发表时间:
2021-11
期刊:
影响因子:
--
通讯作者:
Lorenz T. Biegler
中科院分区:
文献类型:
--
作者:
Weifeng Chen;Baojia Wang;Lorenz T. Biegler
Parameter estimation is a crucial step in system modeling. In practice, the fundamental models developed by chemical engineers are often complex. There may be parameters that have no or little effect on the model prediction. Also, some parameters may have an impact on model prediction related to other parameters. In this case, it is difficult to estimate all the parameters. The general approach to address this issue is to select a subset of parameters to estimate, and fix the rest at the initial value. Here, a reduced Hessian and statistical criterion-based parameter estimation approach is proposed for improving model prediction. The proposed method considers the influence of the initial parameter values on model prediction. In the process of selecting the optimal subset of transformed parameters based on the mean square error (MSE) of output, the sensitivity matrix is replaced by the reduced Hessian matrix, which can save computational cost of MSE calculation. After obtaining the optimal transformed parameter subset, the optimal initial values are selected based on the statistical criterion. The large difference between the model prediction and the actual model output caused by the arbitrary initial values can be avoided. The numerical results show the effectiveness of the proposed approach.
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影响因子:
--
作者:
Wu J;Sinfield JL;Buchanan-Wollaston V;Feng J
通讯作者:
Feng J
影响因子:
6.8
作者:
S. Vajda;H. Rabitz
通讯作者:
S. Vajda;H. Rabitz
影响因子:
4.2
作者:
McLean, Kevin A. P.;Wu, Shaohua;McAuley, Kimberley B.
通讯作者:
McAuley, Kimberley B.
DOI:
10.1137/0904025
发表时间:
1983-06
期刊:
Siam Journal on Scientific and Statistical Computing
影响因子:
--
作者:
P. Gill;W. Murray;M. Saunders;M. H. Wright
通讯作者:
P. Gill;W. Murray;M. Saunders;M. H. Wright
影响因子:
4.2
作者:
Y. Chu;J. Hahn
通讯作者:
Y. Chu;J. Hahn