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3 results on '"Liangcai Zeng"'

1. A Genetic Algorithm-Based Neural Network Approach for Fault Diagnosis in Hydraulic Servo-Valves.

Author

Yeung, Daniel S., Zhi-Qiang Liu, Xi-Zhao Wang, Hong Yan, Hao Huang, Kuisheng Chen, and Liangcai Zeng

Abstract

The hydraulic servo-valve is the key component of the electro-hydraulic system. But it is difficult to diagnose faults in a hydraulic servo-valve. In this paper, a Genetic Algorithm-based Artificial Neural Network model for fault diagnosis in hydraulic servo-valves is proposed. We use a known set of servo-valve faults as the outputs to the valve-behavior model. Adoption of this approach brings about the advantages of reducing training time and increasing accuracy when compared with the traditional Back Propagation Neural Network. [ABSTRACT FROM AUTHOR]

Published
2006
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2. Dynamic Analysis of Test Frame of Railway Subgrade Dynamic Response Test System.

Author

Liangcai Zeng, Feilong Zheng, Anyu Zhang, and Gangsheng Kai

Subjects
RAILROADS, TRANSPORTATION engineering, PAVEMENT subgrades, ELECTRIC displacement, TRANSIENT responses (Electric circuits), DEFORMATIONS (Mechanics), MECHANICAL behavior of materials
Abstract

In this paper, we take the railway subgrade dynamic response test system as the study object, the laboratory test reaction frame's model factors were analyzed through the finite element analysis software MSC.Patran/Nastran. The former six-order original frequencies and vibration modes of the frame were caculated and evaluated in detail. Then we studied its transient response under two working conditions: when it's fully loaded and suddenly unloaded, and the deformation displacement curves of the key points of the frame were obtained. These results provide a basis for the detailed study to the mechanical behavior of the frame and setting the proper working frequencies of the hydraulic servo excitation cylinder to avoid the resonance. [ABSTRACT FROM AUTHOR]

Published
2013
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3. Dynamic Analysis of Test Frame of Railway Subgrade Dynamic Response Test System.

Author

Liangcai Zeng, Feilong Zheng, Anyu Zhang, and Gangsheng Kai

Subjects
RAILROAD communication systems, DYNAMICAL systems, COMPUTER simulation, FINITE element method, WORK environment, HYDRAULIC servomechanisms
Abstract

In this paper, we take the railway subgrade dynamic response test system as the study object, the laboratory test reaction frame's model factors were analyzed through the finite element analysis software MSC.Patran/Nastran. The former six-order original frequencies and vibration modes of the frame were caculated and evaluated in detail. Then we studied its transient response under two working conditions: when it's fully loaded and suddenly unloaded, and the deformation displacement curves of the key points of the frame were obtained. These results provide a basis for the detailed study to the mechanical behavior of the frame and setting the proper working frequencies of the hydraulic servo excitation cylinder to avoid the resonance. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

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