Vibration and acoustic frequency spectra for industrial process modeling using selective fusion multi-condition samples and multi-source features

• Published in: Mechanical systems and signal processing Vol. 99; pp. 142 - 168
• Main Authors: Tang, Jian, Qiao, Junfei, Wu, ZhiWei, Chai, Tianyou, Zhang, Jian, Yu, Wen
• Format: Journal Article
• Language: English
• Published: Berlin Elsevier Ltd 15.01.2018; Elsevier BV
• Subjects: Acoustics; Adaptive algorithms; Computer simulation; Data integration; Frequency spectrum; Genetic algorithm; Genetic algorithms; Grinding mills; Kernel partial least squares; Mathematical models; Mechanical vibration and acoustic signals; Multi-layer selective ensemble; Multisensor fusion; Process parameters; Selective information fusion; Sensors; Signaling; Spectra; Studies; Vibration; Vibration measurement; Frequency spectrum; Selective information fusion; Kernel partial least squares; Mechanical vibration and acoustic signals; Multi-layer selective ensemble; Genetic algorithm
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2017.06.008

•A multi-layer selective ensemble (MLSEN) method for modeling mechanical signals is proposed.•The objective of MLSEN is to simulate domain experts’ cognitive process in industrial practice.•Selective information fusion based multi-condition samples and multi-source features is realized. Frequency spectral data of mechanical vibration and acoustic signals relate to difficult-to-measure production quality and quantity parameters of complex industrial processes. A selective ensemble (SEN) algorithm can be used to build a soft sensor model of these process parameters by fusing valued information selectively from different perspectives. However, a combination of several optimized ensemble sub-models with SEN cannot guarantee the best prediction model. In this study, we use several techniques to construct mechanical vibration and acoustic frequency spectra of a data-driven industrial process parameter model based on selective fusion multi-condition samples and multi-source features. Multi-layer SEN (MLSEN) strategy is used to simulate the domain expert cognitive process. Genetic algorithm and kernel partial least squares are used to construct the inside-layer SEN sub-model based on each mechanical vibration and acoustic frequency spectral feature subset. Branch-and-bound and adaptive weighted fusion algorithms are integrated to select and combine outputs of the inside-layer SEN sub-models. Then, the outside-layer SEN is constructed. Thus, “sub-sampling training examples”-based and “manipulating input features”-based ensemble construction methods are integrated, thereby realizing the selective information fusion process based on multi-condition history samples and multi-source input features. This novel approach is applied to a laboratory-scale ball mill grinding process. A comparison with other methods indicates that the proposed MLSEN approach effectively models mechanical vibration and acoustic signals.