Pressure Control System for Rail Grinding Based on Chamber Adjustment

NIE Meng; LI Jianyong; SHEN Haikuo

doi:10.3969/j.issn.0258-2724.2015.05.005

Volume 28 Issue 5

Oct. 2015

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Journal of Southwest Jiaotong University > 2015 > 28(5): 796-802.

NIE Meng, LI Jianyong, SHEN Haikuo. Pressure Control System for Rail Grinding Based on Chamber Adjustment[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 796-802. doi: 10.3969/j.issn.0258-2724.2015.05.005

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NIE Meng, LI Jianyong, SHEN Haikuo. Pressure Control System for Rail Grinding Based on Chamber Adjustment[J]. Journal of Southwest Jiaotong University, 2015, 28(5): 796-802. doi: 10.3969/j.issn.0258-2724.2015.05.005

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Pressure Control System for Rail Grinding Based on Chamber Adjustment

doi: 10.3969/j.issn.0258-2724.2015.05.005

Received Date: 14 Jun 2013
Publish Date: 25 Oct 2015

Abstract

Abstract

To reduce the pressure fluctuation during rail grinding operation, a new rail grinding pressure control system was proposed by adding a chamber adjuster into the traditional pneumatic constant pressure control system. The chamber adjuster consisted of a gas holder and a proportional flow valve. It could absorb the shock pressure exerting on the system to reduce the pressure fluctuation and supplement energy for the system when delivery pressure was needed to accelerate system response. To ensure the accuracy and stability of the rail grinding pressure control, the rail grinding pressure system with chamber adjuster adopted a double closed-loop control system based on variable structure control, and the controller was designed according to the control characteristic of each closed loop. In addition, the characteristics of the proposed control system were verified by numerical simulation and grinding experiments, and compared with those of the traditional rail grinding pressure control system. The results show that the chamber adjustment control system could reduce 76.8% of the pressure fluctuation in the traditional pressure control system.
- rail grinding,
- chamber adjuster,
- pneumatic pressure control,
- variable structure control

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Pressure Control System for Rail Grinding Based on Chamber Adjustment

doi: 10.3969/j.issn.0258-2724.2015.05.005

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