scholarly journals Suppressing Vertical Vibration in Railway Vehicles through Air Spring Damping Control

2007 ◽  
Vol 1 (2) ◽  
pp. 212-223 ◽  
Author(s):  
Yoshiki SUGAHARA ◽  
Tadao TAKIGAMI ◽  
Akihito KAZATO
Keyword(s):  
Vertical Vibration ◽  
Air Spring ◽  
Railway Vehicles ◽  
Damping Control

Experimental study on vertical vibration characteristics of medium-low speed maglev vehicle when standing still on steel beams

2021 ◽  
pp. 095440972110324
Author(s):  
Miao Li ◽  
Xiaohao Chen ◽  
Shihui Luo ◽  
Weihua Ma ◽  
Cheng Lei ◽  
...  
Keyword(s):  
Coupled System ◽  
Vertical Vibration ◽  
Vibration Characteristics ◽  
Steel Beams ◽  
Steel Beam ◽  
Air Spring ◽  
Low Speed ◽  
Maglev Vehicle ◽  
Excited Vibration ◽  
Eigen Frequencies

Levitation stability is the very basis for the dynamic operation of Electromagnetic Suspension (EMS) medium-low speed maglev trains (MSMT). However, self-excited vibration tends to occur when the vehicle is standing still above the lightweight lines, which remains a major constraint to the promotion of medium-low speed maglev technology. In order to study the vertical vibration characteristics of the coupled system of MSMT when it is standing still above lightweight lines, levitation tests were carried out on two types of steel beams: steel beam and active girder of the turnout, with a newly developed maglev vehicle using levitation frames with mid-set air spring. Firstly, modal tests were carried out on the steel beam to determine its natural vibration characteristics; secondly, the acceleration signals and the dynamic displacement signals of the air spring obtained at each measurement point were analyzed in detail in both the time and frequency domains, and the vertical ride comfort was assessed by means of the calculated Sperling index. Subsequently, theoretical explanations were given for the occurrence of self-excited vibration of coupled system from the perspective of the vehicle-to-guideway vibration energy input. Results show that the eigen frequencies of the vehicle on the steel beam and the turnout are 9.65 Hz and 2.15 Hz, respectively, the former being close to the natural frequency of the steel beam while the latter being close to the natural frequency of the air spring suspension system, thus causing the self-excited vibration of the coupled system. It is recommended to either avoid the main eigen frequencies of the coupled system or to increase the damping of the corresponding vibration modes to guarantee a reliable coupled system for its long-term performance. These results may provide valuable references for the optimal design of medium-low speed maglev systems.

scholarly journals Study on Cbanges in Material Properties of Air Spring Rubber Bellows for Railway Vehicles.

2001 ◽  
Vol 58 (2) ◽  
pp. 92-98 ◽  
Author(s):  
Toshio AZECHI ◽  
Masanori HANSAKA ◽  
Naoto MIFUNE ◽  
Riichiro OHARA
Keyword(s):  
Material Properties ◽  
Air Spring ◽  
Railway Vehicles

A Novel Energy-Harvesting Active Radial Bogie for Railway Vehicles: Design, Simulation and HIL Test

2015 ◽  
Vol 733 ◽  
pp. 695-698
Author(s):  
Shu Shu Wang ◽  
Xiao Meng Shen ◽  
Xiao Jian Tu
Keyword(s):  
Energy Harvesting ◽  
Shock Absorber ◽  
Vertical Vibration ◽  
Vibration Energy ◽  
Railway Transportation ◽  
Railway Vehicles ◽  
Rail Vehicles ◽  
Simulation Results ◽  
Regenerative Shock Absorber ◽  
And Control

With the increasing development of railway transportation, the wheel-rail wearing problem is becoming more and more serious while the increasing of both the operating speed and loading weight of railway vehicles. Active radial bogie is one of the hotspots for research in the area of decreasing the wheel-rail wearing issues. Meanwhile, the energy dissipation problem has been restricting its development. This paper puts forward a novel energy-harvesting active radial bogie for rail vehicles. Making use of the hydraulic electromagnetic energy-regenerative shock absorber, the vertical vibration energy could be harvested while train is traveling. Detailed study and evaluation for this active radial bogie will be presented. The tests and simulation results prove the effectiveness of the proposed bogie mechanism and control.

B31 Active Control of Vertical Vibration of Pneumatic Air Spring For Rail Train using Acceleration, Velocity and Flow Rate Feedbacks

2009 ◽  
Vol 2009.11 (0) ◽  
pp. 470-473 ◽  
Author(s):  
Tomonori KATO ◽  
Daisuke SHINAGAWA ◽  
Kotaro TADANO ◽  
Kenji KAWASHIMA ◽  
Toshiharu KAGAWA
Keyword(s):  
Active Control ◽  
Flow Rate ◽  
Vertical Vibration ◽  
Air Spring
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