Simulation of maglev vehicles riding over single and double span guideways

Meisinger, Reinhold

doi:10.1016/0378-4754(79)90134-4

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…The dynamic interaction of maglev vehicles and their pillared track is investigated in numerous previous publications focusing on different aspects. Some publications focus on the bending of an elastic beam representing the guideway but simplify the vehicle by a point mass or single constant force [2,3,4]. Others exploit a detailed vehicle model, but the guideway is modeled by rigid elements [5,6].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a High-speed Maglev Vehicle on an Infinite Elastic Guideway

Schneider¹,

Schmid²,

Dignath³

et al. 2021

Proceedings of the 10th ECCOMAS Thematic Conference on MULTIBODY DYNAMICS

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For magnetic levitation transport systems with pillared tracks, detailed simulation models of the coupled system of vehicle and guideway offer a valuable contribution to find a tradeoff between stiff/heavy guideway elements, required to keep disturbances small for the controller, and low material consumption. This work provides a novel model of a detailed rigid multibody Transrapid maglev vehicle with three sections moving along an infinite periodically pillared elastic guideway mapping the two-dimensional heave-pitch motion of the vehicle and the elastic bending of the guideway elements. The infinite guideway is realized by moving system boundaries, i.e., the same few Euler-Bernoulli beams representing the current track segment are used repeatedly to form an infinite sequence of guideway elements. The equations of motion of the elastic beams and the rigid multibody vehicle are obtained from the multibody modeling and simulation toolbox Neweul-M 2 . A detailed magnet model in combination with a model predictive control scheme are used for the first time in a large maglev vehicle model in this contribution. All model components are combined and coupled in a Simulink model. Simulation results show more severe overshoots and oscillations of the guideway deflection below the vehicle the faster the vehicle passes, which is resulting in bigger control errors and magnet motions at the rear end of the vehicle compared to the vehicle mid and front. Therefore, in contrast to previous presumptions, the most critical situations are to be expected at the rear end magnet, not at the front end.

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Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a High-speed Maglev Vehicle on an Infinite Elastic Guideway

Schneider¹,

Schmid²,

Dignath³

et al. 2021

Proceedings of the 10th ECCOMAS Thematic Conference on MULTIBODY DYNAMICS

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“…For EMS type urban maglev vehicle, early research usually simplified the vehicle as a single point [4] or combined multi-points model [5,6], which is hard to reflect the actually dynamic characteristics of the vehicle. Therefore, it is of importance to improve the model precision of the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Robust Immersion and Invariance Adaptive Synchronization Control With Disturbance Observer for Maglev Module With Output Constraint

Liu

Zhang

2021

Preprint

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Magnetic levitation module is the key component of maglev train that generates the electromagnet force to bear the weight of the vehicle cabin. In this paper, the mathematical model of the levitation module is built as a two-input and two-output coupled system whose state variables include the vertical linear motion and the rotational motion around the mass center, which fully considers the mechanical coupling and force interference. To alleviate the variation of the module, a framework of robust immersion and invariance (I&I) adaptive synchronization control with disturbance observer is presented for the levitation module. To deal with the bad effects of parametric uncertainties and external disturbances on the system performance, especially on system outputs, we introduce Barrier Lyapunov Function (BLF) into controller to keep the outputs in the prescribed constraints. The robust I&I adaptation law is used to shape the converging procedure of the estimate errors of the parametric uncertainties. An extended disturbance observer is developed to recover the mismatched disturbances of the maglev module simultaneously. The stability analysis shows that all the signals in the closed-loop system are bounded and output constraints are not violated as well. The effectiveness of the proposed scheme is verified by a numerical simulations at last.

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“…In order to solve the problem of EMS maglev vehicle--bridge coupled vibration, many experts and scholars have conducted studies on its mechanism from different angles, and the dynamics models established are gradually developed from simple to complex. In the early days, Meisinger, 4 Popp, 5 Cai, 6 etc. simplified the maglev vehicle to moving force (concentrated or distributed forces), moving mass or simple linear spring-damping lumped mass model, and used the Bernoulli--Euler beam model to analyze the influence of vehicle speed and bridge parameters on the vibration responses.…”

Section: Introductionmentioning

confidence: 99%

Coupled dynamic analysis of low and medium speed maglev vehicle-bridge interaction using SIMPACK

Luo

2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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The low- and medium-speed maglev vehicle generally operates on elevated bridges with a levitation gap of only 8--10 mm, which makes it very sensitive to the vehicle--bridge coupled vibration. To conduct the corresponding modeling and simulation with common dynamics tools, an equivalent processing of the levitation system is required. Using the dynamics software SIMPACK, this paper first introduces the methods of building the multi-body vehicle system, levitation control system and the elastic bridge, respectively, in the SIMPACK railway module, levitation control module and SIMBEAM elastomer module, thus providing a modeling idea for the simulation of the active levitation and operation of low- and medium-speed maglev vehicles through multi-span bridges. It then goes on to simulate and analyze the coupled vibration of a 160 km/h low- and medium-speed maglev vehicle passing through 25 m + 25 m double-span continuous bridges. The research results show that the modeling method introduced in this paper can simulate the low- and medium-speed maglev vehicle--bridge coupled vibration phenomenon, which can be affected significantly by the low-order frequency of the elastic bridge, and can also be intensified under the bridge end impact when the vehicle enters and leaves the bridge. As the running speed of the vehicle increases and the dynamic force increases, the vertical vibration amplitudes of the elastic bridge mid-span, the car body as well as the levitation frame approximate a linear fitting with the vehicle speed. The variation amplitudes of the levitation gap and of the electromagnet current approximate a quadratic fitting with the vehicle speed.

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Simulation of maglev vehicles riding over single and double span guideways

Cited by 12 publications

References 9 publications

Modeling and Simulation of a High-speed Maglev Vehicle on an Infinite Elastic Guideway

Modeling and Simulation of a High-speed Maglev Vehicle on an Infinite Elastic Guideway

Robust Immersion and Invariance Adaptive Synchronization Control With Disturbance Observer for Maglev Module With Output Constraint

Coupled dynamic analysis of low and medium speed maglev vehicle-bridge interaction using SIMPACK

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