The invention provides a high-speed railway roadbed slab deformation monitoring and predicting method based on a variational heteroscedasticity Gaussian process. The method firstly develops a novel online structure health monitoring system based on a fiber bragg grating technology. The system is immune to electromagnetic interference of monitoring data, has a temperature self-compensation capability, and realizes continuous and long-term monitoring of roadbed slab deformation. Aiming at different uncertainty sources of the monitoring data, the variational heteroscedasticity Gaussian process isdiscussed, variational Bayes and Gaussian approximation are used for modeling the data, and uncertainty factor analysis and data prediction of the monitoring data are further carried out. The resultshows that the VHGP framework regression analysis result is more stable, and the estimated confidence level can better describe the noise heteroscedasticity of the high-speed rail data. Through adoption of the VHGP method, high regression and prediction precision can be obtained, and the predicted maximum noise position is more accurate. Defects of research on roadbed slab deformation monitoring are overcome, and technical support is provided for safety construction and effective operation of a high-speed rail system.

    本发明提供一种基于变分异方差高斯过程的高速铁路道床板变形监测和预测方法。本发明首先开发一种基于光纤布拉格光栅技术的新型在线结构健康监测系统。该系统对监测数据的电磁干扰免疫,具有温度自补偿能力,实现对道床板变形连续、长期监测。本发明针对监测数据的不同不确定性来源,探讨变分异方差高斯过程,利用变分贝叶斯和高斯近似对数据建模、进一步开展监测数据不确定性因素分析和数据预测。结果表明,VHGP框架回归分析结果更稳健,估计的置信水平能较好描述高铁数据的噪声异方差。通过VHGP方法,可获得较高回归和预测精度,且预测的噪声最大位置更准确。弥补道床板变形监测的研究不足,为高铁系统安全建设与有效运营提供技术支撑。


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    Titel :

    High-speed railway roadbed slab deformation monitoring and predicting method based on variational heteroscedasticity Gaussian process


    Weitere Titelangaben:

    基于变分异方差高斯过程的高速铁路道床板变形监测和预测方法


    Beteiligte:
    WANG QI'ANG (Autor:in) / ZHANG CHENG (Autor:in) / DAI YANG (Autor:in) / NI YIQING (Autor:in) / ZHANG CHAO (Autor:in)

    Erscheinungsdatum :

    2020-04-14


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung



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