Open AccessSimulation on following Performance of High-Speed Railway In Situ Testing System
Author(s) -
Fenli Zheng,
Liangcai Zeng,
Xinyuan Chen
Publication year - 2013
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1155/2013/679603
Subject(s) - train , control theory (sociology) , waveform , signal (programming language) , transfer function , distortion (music) , servo , smoothness , subgrade , computer science , engineering , simulation , structural engineering , voltage , control (management) , mechanical engineering , electronic engineering , mathematics , amplifier , mathematical analysis , cartography , cmos , artificial intelligence , electrical engineering , programming language , geography
Subgrade bears both the weight of superstructures and the impacts of running trains. Its stability affects the line smoothness directly, but in situ testing method on it is inadequate. This paper presents a railway roadbed in situ testing device, the key component of which is an excitation hydraulic servo cylinder that can output the static pressure and dynamic pressure simultaneously to simulate the force of the trains to the subgrade. The principle of the excitation system is briefly introduced, and the transfer function of the closed-loop force control system is derived and simulated; that, it shows without control algorithm, the dynamic response is very low and the following performance is quite poor. So, the improvedadaptive model following control (AMFC) algorithm based on direct state method is adopted. Then, control block diagram is built and simulated with the input of different waveforms and frequencies. The simulation results show that the system has been greatly improved; the output waveform can follow the input signal much better except for a little distortion when the signal varies severely. And the following performance becomes even better as the load stiffness increases