Studies on Frequency Response Characteristics of High-Speed Railway Train End Relationship Test System with Flexible Bases

Zhiqiang Zhang, Dacheng Cong, Zhidong Yang, Yunfei Cai and Junwei Han
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Zhiqiang Zhang: State Key Laboratory of Robotics and System, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street No. 92, Harbin 150000, China
Dacheng Cong: State Key Laboratory of Robotics and System, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street No. 92, Harbin 150000, China
Zhidong Yang: State Key Laboratory of Robotics and System, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street No. 92, Harbin 150000, China
Yunfei Cai: State Key Laboratory of Robotics and System, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street No. 92, Harbin 150000, China
Junwei Han: State Key Laboratory of Robotics and System, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street No. 92, Harbin 150000, China

Energies, 2021, vol. 14, issue 19, 1-13

Abstract: A train end relationship test system was installed with a Stewart parallel robot on the reaction bases perpendicular to the ground, to test the fatigue and durability of train end relationship components, such as the transfixion way of a high-speed railway train. The flexibility of the reaction bases affected the test accuracy of the train end relationship components within a test frequency band range. In this paper, a coupling characteristic model was established between the flexible bases and the parallel robot. Then, the analytical relationship was analyzed between the natural frequency of the bases and the natural frequency of the parallel robot. Moreover, a design criterion was proposed for the natural frequency of the reaction bases. It was considered that when the natural frequency of the bases was not less than five times the natural frequency of the parallel robot, the influence of the flexibility of the bases on the test accuracy can be ignored. The validity of the design criterion was verified by the simulation results.

Keywords: stewart parallel robot; flexible reaction base; dynamic coupling; natural frequency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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