Health evaluation of a crane&rsquo;s leg control valve based on PCA and Mahalanobis distance

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (3) : 46-51.

Health evaluation of a crane’s leg control valve based on PCA and Mahalanobis distance

ZHANG Xudong1, HUANG Yixiang1, SHAN Zenghai2

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Abstract

The performance of a leg control valve is one of important factors affecting telescopic performance of a crane’s leg system.Here, in order to accurately evaluate health performance of a leg control valve, an evaluation method for crane leg system’s performance degradation and health state was proposed based on the analysis model using the principal component analysis (PCA) dimension reduction combined with Mahalanobis distance to establish a mapping relation between sensor signals and key components under different states, and achieve the goal to quantitatively evaluate a crane leg system’s performance degradation.The method was used with pressure signals of a crane’s leg control valve.Its quantitative performance evaluation results were obtained using the correlation analysis of sensor signal implication relation and crane’s each year features extracted in the feature space.It was shown that compared with other methods, the proposed model can accurately reflect performance degradation trend of a crane leg system over years with better robustness and generalization.

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outrigger control valves / principal component analysis (PCA) / Mahalanobis distance / health evaluation / performance degradation

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ZHANG Xudong1, HUANG Yixiang1, SHAN Zenghai2. Health evaluation of a crane’s leg control valve based on PCA and Mahalanobis distance[J]. Journal of Vibration and Shock, 2020, 39(3): 46-51

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