Robust control simulation on following performance of high-speed railway in situ testing system

• Published in: Advances in mechanical engineering Vol. 10; no. 2
• Main Authors: Mao, Yang, Zeng, Liangcai, Zhen, Feilong
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01-02-2018; Sage Publications Ltd; SAGE Publishing
• Subjects: Computer simulation; Control algorithms; Control simulation; Control theory; Cylinders; Dynamic pressure; Excitation; Field tests; High speed rail; Noise intensity; Robust control; Simulation; Smoothness; Superstructures; Waveforms; robust control; Following performance; excitation system; in situ testing method
• ISSN: 1687-8132; 1687-8140
• DOI: 10.1177/1687814018758222

Subgrade bears both the impacts of the high-speed train and the weight of superstructures. Its stability affects the line smoothness directly, but it is very hard to simulate its working condition, and the in situ testing method is inadequate. The article presents a railway roadbed in situ testing device, and it proposes an excitation hydraulic cylinder system to output static and dynamic pressure simultaneously in order to simulate the force of the train. The dynamic following performance is quite poor without control algorithm, so the robust control block is adopted to improve the following performance of the excitation system under different frequencies and waveforms. In addition, considering the effects of the external disturbances, simulation is carried out with a certain intensity of noise to test the effectiveness of the control scheme. The simulation results show that the robust control algorithm makes the excitation system achieving much better following performance.