Estimating the wheel lateral position of a mechatronic railway running gear with nonlinear wheel–rail geometry

Keck, Alexander; Schwarz, Christoph; Meurer, Thomas; Heckmann, Andreas; Grether, Gustav

doi:10.1016/j.mechatronics.2020.102457

Cited by 13 publications

(10 citation statements)

References 17 publications

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“…-The lateral position of the running gear with respect to the track center line is an important measurement in order to organize lateral guidance, but is difficult to measure in daily operation on a real track. This is why observation of this quantity has been proposed in [5] and will be prototyped in true scale at the research facility. Three alternative sensor configurations and three different nonlinear filter algorithms, the Extended Kalman Filter, the Unscented Kalman Filter and the Ensemble Kalman Filter have been analyzed with promising results in previous research efforts, cp.…”

Section: Control Structurementioning

confidence: 99%

See 1 more Smart Citation

A Research Facility for the Next Generation Train Running Gear in True Scale

Heckmann

Lüdicke²,

Keck³

et al. 2022

Lecture Notes in Mechanical Engineering

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The running gears of DLR's long-term project Next Generation Train utilize independently rotating wheels with mechatronic track guidance, direct drives close to the wheels and are optimized for low weight. On the basis of encouraging research results so far, DLR decided to design and build a true scale prototype of the NGT running gear and use it as a research facility. It is the intention to improve, validate and demonstrate the mechanical and mechatronic design, sensor and actuator lay-out step by step and finally approach the Technology Readiness Level 6. By the end of 2022, this prototype will be put into operation considering low speed scenarios up to max. 5 m/s at an in-house integration test rig. This is the current task, which is reported on in the paper. However, this work is supposed to prepare advanced performance experiments up to 350 km/h on external roller rigs and at railway test tracks later on.

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Section: Control Structurementioning

confidence: 99%

“…The Extended Kalman Filter algorithm provides the observation ŷ of the lateral position y, and of the other states ẏ, ψ and the yaw angle rate ψ as well, cp. [5]. Feedback of the estimated state values with coefficients k y , k ẏ , k ψ and k ψ is applied to control the differential torque τ according to (1):…”

Section: Control Structurementioning

confidence: 99%

A Research Facility for the Next Generation Train Running Gear in True Scale

Heckmann

Lüdicke²,

Keck³

et al. 2022

Lecture Notes in Mechanical Engineering

Self Cite

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“…Achieving the maximum effect of reducing wheel flange wear intensity and the running resistance in curves is possible by an application of railway wagon bogies with an automatically controlled mechanism for the radial guidance of wheelsets, which works by means of using a mechatronic system [26,27]. The potential benefits that can be achieved in using such a mechatronic system make it an advisable subject for further activities on their development and research [16,17].…”

Section: A Current State Of the Problemmentioning

confidence: 99%

A Study of Improving Running Safety of a Railway Wagon with an Independently Rotating Wheel’s Flange

et al. 2021

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The main objective of this work is to study the possibilities of improving the running safety of a railway wagon with independently rotating wheels by changing their design symmetrically mounted on an axle. The article provides a discussion of the advantages and disadvantages of using the independently rotating wheels in a bogie of railway wagons. Their increasing tendency of derailment is described. The influence of a perspective constructive scheme (PKS) of railway wagon wheels in comparison with a traditional constructive scheme (TKS) on running safety due to the climbing of a wheel flange onto a rail is studied. This work introduces a conceptual proposition of a technical solution to railway wheel design as well as containing the results of both analytical calculations as well as the results of multibody simulations. A PKS wheel design for a railway wheel is designed that allows independent rotation of its tread surface and of a guiding surface (i.e., of a flange) to each other, which both are arranged symmetrically on a wheelset axle. It brings features of the distribution of friction forces generating in a flange contact when the wheel with a TKS and with PKS move on a rail. It is possible to conclude with the help of the obtained results that the use of wheels with the PKS is advisable for the reduction of the running resistance as well as for increasing the running safety of railway wagons.

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“…Wang et al (2021Wang et al ( , 2022 studied the coupling dynamic behaviour of a transmission system with gear eccentricities for a high-speed train. Keck et al (2021) researched a mechatronic running gear with independently rotating wheels (IRW) for the "Next Generation Train" (NGT) which is a double-deck high speed train concept in light-weight design.…”

Section: Introductionmentioning

confidence: 99%

Improved method for analysing the dynamic response of gear transmission systems

Liu

et al. 2022

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PurposeThe purpose of this paper is to propose an improved method which can shorten the calculation time and improve the calculation efficiency under the premise of ensuring the calculation accuracy for calculating the response of dynamic systems with periodic time-varying characteristics.Design/methodology/approachAn improved method is proposed based on Runge–Kutta method according to the composition characteristics of the state space matrix and the external load vector formed by the reduction of the dynamic equation of the periodic time-varying system. The recursive scheme of the holistic matrix of the system using the Runge–Kutta method is improved to be the sub-block matrix that is divided into the upper and lower parts to reduce the calculation steps and the occupied computer memory.FindingsThe calculation time consumption is reduced to a certain extent about 10–35% by changing the synthesis method of the time-varying matrix of the dynamics system, and the method proposed of paper consumes 43–75% less calculation time in total than the original Runge–Kutta method without affecting the calculation accuracy. When the ode45 command that implements the Runge–Kutta method in the MATLAB software used to solve the system dynamics equation include the time variable which cannot provide its specific analytic function form, so the time variable value corresponding to the solution time needs to be determined by the interpolation method, which causes the calculation efficiency of the ode45 command to be substantially reduced.Originality/valueThe proposed method can be applied to solve dynamic systems with periodic time-varying characteristics, and can consume less calculation time than the original Runge–Kutta method without affecting the calculation accuracy, especially the superiority of the improved method of this paper can be better demonstrated when the degree of freedom of the periodic time-varying dynamics system is greater.

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Estimating the wheel lateral position of a mechatronic railway running gear with nonlinear wheel–rail geometry

Cited by 13 publications

References 17 publications

A Research Facility for the Next Generation Train Running Gear in True Scale

A Research Facility for the Next Generation Train Running Gear in True Scale

A Study of Improving Running Safety of a Railway Wagon with an Independently Rotating Wheel’s Flange

Improved method for analysing the dynamic response of gear transmission systems

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