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Your search keyword '"Zhao, Xiuxu"' showing total 2 results
2 results on '"Zhao, Xiuxu"'

1. Degradation process analysis and reliability prediction modeling of hydraulic reciprocating seal based on monitoring data.

Author

Zhao, Xiuxu, Appiah, Emmanuel, Xia, Yage, and Wang, Jizheng

Subjects
*HYDRAULIC models, *PREDICTION models, *HYDRAULIC cylinders, *FIBER Bragg gratings, *PRESSURE sensors, *ELECTROHYDRAULIC effect
Abstract

• The degradation process of hydraulic reciprocating seal is studied. • The deteriorating parameters are extracted based on monitoring data. • Reliability prediction model of the hydraulic reciprocating seal is established. • The applicable conditions of the reliability prediction model are discussed. It is of great significance to analyze the degradation process of the hydraulic reciprocating seal and accurately predict its reliability for taking corresponding measures timely and avoiding losses and accidents. However, the degradation process of a hydraulic reciprocating seal largely depends on actual working parameters of hydraulic cylinder. Therefore, the performance degradation process of the hydraulic reciprocating seal must be studied according to the actual working process parameters of the hydraulic cylinder. In this paper, the degradation process of hydraulic reciprocating seal is studied in a specially designed experimental system. The experimental data are monitored by fiber Bragg grating (FBG) sensor, pressure sensor and friction sensor. The extraction method of performance degradation parameters of the hydraulic reciprocating seal is studied. The reliability prediction model is established, namely R-N curve, which can describe the performance deteriorating process of the hydraulic reciprocating seal. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Experimental study of hydraulic cylinder leakage and fault feature extraction based on wavelet packet analysis.

Author

Zhao, Xiuxu, Zhang, Shuanshuan, Zhou, Chuanli, Hu, Zhemin, Li, Rui, and Jiang, Jihai

Subjects
*HYDRAULIC cylinders, *FEATURE extraction, *WAVELETS (Mathematics), *PHYSICS experiments, *PISTONS
Abstract

Hydraulic cylinder is the actuator in hydraulic system, and its failure directly affects the normal operation of the system. The leakage of hydraulic cylinder is a major failure mode usually caused by failure or damage of the seal, and it should be detected as early as possible to avoid worse breakdowns of system. However, the leakage is difficult to be diagnosed in the early stage, so the basic aim of the paper is to seek out the fault features which could forecast the early leakage of hydraulic cylinder. In this study, inlet and outlet pressure signals and displacement signal of piston rod of hydraulic cylinder have been collected from a special designed test-bed, which simulates different leakage levels of hydraulic cylinder. The result shows that there are five fault features in total can be extracted by wavelet packet analysis to distinguish different levels of the leakage obviously. [ABSTRACT FROM AUTHOR]

Published
2015
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