Vibration analysis of maglev three-span continuous guideway considering control system

Teng, Yan-feng; Teng, Nianguan; Kou, Xin-jian

doi:10.1631/jzus.a071214

Cited by 18 publications

(3 citation statements)

References 8 publications

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“…Considering only the Maglev control system, the problems include vehicle-track coupling dynamic modeling [30,31], vibration control [32][33][34], suspension control [35,36], fault diagnosis and tolerance control [37][38][39][40][41], hybrid magnet study, etc. [42,43].…”

Section: Development and Discussion Of Maglev Key Technologiesmentioning

confidence: 99%

Maglev Train Overview

Liu

2015

Springer Tracts in Mechanical Engineering

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IntroductionMaglev (means magnetic C levitation) is a method of propulsion that uses magnetic levitation to propel vehicles with magnets rather than with wheels, axles, and bearings. With the Maglev, a vehicle is levitated a short distance away from a guideway by using magnets to create both lift and thrust. In general, Maglev trains move more smoothly and somewhat more quietly than wheeled mass transit systems. Their non-reliance on traction and friction means that acceleration and deceleration can surpass that of wheeled transports and they will be protected from the weather. At very high speeds of the conventional wheeled trains, the wear and tear from friction along with the hammer effect from wheels on rails will accelerate equipment deterioration and prevent mechanically based train systems from routinely achieving higher speeds. On the contrary, Maglev tracks have historically been found to be much more expensive to construct, but require less maintenance and have lower ongoing costs. Maglev can transport passengers and freight over long distances at speeds of hundreds of miles per hour. Maglev promises to be a major mode of transport in the twenty-first century, even more important than autos, trucks, and airplanes [1].The term "Maglev" refers not only to the vehicles but also to the railway system, specifically designed for magnetic levitation and propulsion. All operational implementations of Maglev technology have the minimal overlap with wheeled train technology and have not been compatible with conventional rail tracks. Considering the fact that they cannot share existing infrastructure, these Maglev systems must be designed as complete transportation systems. In addition, the vacuum tube train systems might hypothetically allow Maglev trains to attain speeds in a different order of magnitude. While no such tracks have been built commercially yet, there are efforts being made to study and develop "super-Maglev" trains.

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Section: Development and Discussion Of Maglev Key Technologiesmentioning

confidence: 99%

Maglev Train Overview

Liu

2015

Springer Tracts in Mechanical Engineering

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“…Huang et al [10] developed an active numerical method to control the tip vibration response of the manipulator, and decreased the vibration of impact loads on the ultra-long flexible manipulators. Teng et al [11] proposed a new open cutter driving hydraulic system based on pressure feedback and electro-hydraulic proportional control for a shield machine, which controlled the different operating states of the accumulator to adapt to the load impact. Wang et al [12] designed a multi-stage throttle-for-stage buffer vibration reduction device, and applied it to the rapid recovery system of the launching frame.…”

Section: Introductionmentioning

confidence: 99%

Experiment and analysis of drop-weight damping control of MR semi-active impact resistance-based hydraulic actuator

Ma,

Huang,

Tang

et al. 2023

Smart Mater. Struct.

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The impact vibration caused by sudden changes in the external load of hydraulic actuators reduces the service life of hydraulic components and limits the high-precision applications of hydraulic actuators. Therefore, to improve the underdamped characteristics and impact resistance of valve-controlled cylinder systems, a semi-active impact resistance control of hydraulic actuator based on magnetorheological damper (MRD) is proposed. Firstly, based on the shear force characteristics of magnetorheological fluid, a multi-stage flow channel MRD is designed, which is connected in series with the hydraulic actuator to form a Hydraulic Damping Actuator (HDA). Meanwhile, based on the mechanical experimental data, the parameters of MRD dynamic model are identified to ensure the accuracy of MRD output force. Secondly, a drop weight impact model is established, and a sliding mode controller which can track the command current in real time is designed, so as to realize the resistance force coupling between the MRD and the hydraulic actuator for improving the impact resistance control effect. Then the dynamic performance test and impact resistance simulation program are established to verify the excellent dynamic performance and impact resistance effect of the HDA with the sliding mode control. Finally, the drop weight impact experimental platform is built. The experimental results show that under the impact with a height of 200 mm, the dynamic offset of the HDA is only -1.14 mm, and the time to return to the original position is 0.07 s, which validate the excellent performance of the proposed scheme in improving the underdamped characteristics of the valve-controlled cylinder system and the dynamic response performance of the hydraulic actuator.

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“…A mathematical model has been established to study the effects of vehicle model, vehicle speed, irregularity, rail deflection ratio, span, span continuity and damping ratio on vehicle-track coupling dynamic response (Lee et al, 2009). In the Refs (Teng, Teng, & Kou, 2008a, 2008b) the maglev train has been simplified as a uniform secondary suspension model, established a real analysis model of vehicle-bridge coupling, and analyzed the vibration law of three span continuous beam when the train passes through. A simplified coupling model of single point suspension based on elastic beam has been established.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on vertical vehicle-rail-bridge coupling of medium and low speed maglev train based on track beam with different stiffness

Chen

Yang

et al. 2022

Journal of Vibration and Control

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In order to analyze and verify the adaptability of train to track beams with different stiffness, the dynamic response of vertical vehicle-track-bridge with different stiffness track beam is studied. Firstly, according to the actual vehicle-track-bridge coupling system, the corresponding mechanical and kinematic equations are established. The natural vibration characteristics of track beams (bridges) with different stiffness are studied, and the dynamic response caused by current control algorithm is analyzed. Secondly, combined with the 3-D model of vehicle-track-bridge and the actual system, the dynamic simulation and experiment of the coupling system of track beam with different stiffness in the speed range of 60 km/h are carried out. The results show that the vertical first-order natural frequency of track beam decreases with the decrease of track beam stiffness. When the deflection span ratio increases, the suspension gap fluctuation increases, but the increase of deflection span ratio within a certain range will not affect the tracking performance of control current, and the train is still in a relatively stable suspension state. For the track beam, with the decrease of stiffness, the vertical deflection of the track beam increases and the high-frequency vibration energy increases, which has a great impact on the vibration response of the coupling system. The research results of this paper can provide a useful reference for the optimization of suspension system of medium and low speed maglev train, line design, and the formulation of construction standard of maglev vehicle-track-bridge system. In addition, the research results of this paper can provide a theoretical basis for reducing the construction cost of track beam.

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Vibration analysis of maglev three-span continuous guideway considering control system

Cited by 18 publications

References 8 publications

Maglev Train Overview

Maglev Train Overview

Experiment and analysis of drop-weight damping control of MR semi-active impact resistance-based hydraulic actuator

Experimental study on vertical vehicle-rail-bridge coupling of medium and low speed maglev train based on track beam with different stiffness

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