Results 21 to 30 of about 16,932 (261)

Development and Validation of a Wheel Wear and Rolling Contact Fatigue Damage Model [PDF]

, 2013
This paper summaries the development of a damage model to predict the deterioration rates of the wheel tread in terms of wear and rolling contact fatigue (RCF) damage.
Bevan, Adam, Eickhoff, Bridget, Molyneux-Berry, Paul, Burstow, Mark   +3 more
core   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Impact of Frog Height Deviations on Dynamic Response of High-Speed Metro Trains Negotiating Turnouts

Shock and Vibration
Composite frogs inevitably have manufacturing or installation errors, leading to deviations in the height of the frogs, which affects the dynamic performance of trains passing through turnouts.
Dongliang Zeng, Shan Jin, Fei Chen, Xiaoyu Hu, Xiuqi Wei, Kaiyu Zeng, Wang Kaiyun, Chang Li   +7 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Wheel–rail contact: experimental study of the creep forces–creepage relationships [PDF]

, 2014
The wheel–rail contact problem plays an important role in the simulation methods used to solve railway dynamics problems. As a consequence, many different mathematical models have been developed to calculate wheel–rail contact forces.
Guiral, A., Baeza González, Luis Miguel, Alonso, A., Baeza, L., Iwnicki, S., Iwnicki, Simon   +5 more
core   +1 more source

Carbody sway behaviour of railway vehicles due to track irregularity from rail alternate side wear

Railway Engineering Science
Track irregularity from rail alternate side wear is manifested as uneven rail wear waveforms alternating in the left and right rails with equal intervals, which will cause carbody sway behaviour of railway vehicles and greatly influences the passenger ...
Lai Wei, Jing Zeng, Ren Luo, Feng Gan, Jijun Gong, Jun Jiang   +5 more
doaj   +1 more source

A Review of Failure Modes and Safety Strategies of Lithium‐Ion Batteries from Materials to Systems

Advanced Science, EarlyView.
A cascade‐aware framework is presented for lithium‐ion battery safety, linking thermal runaway initiation, acceleration, runaway reaction, and propagation with material‐, cell/pack‐, and system‐level interventions. By integrating failure mechanisms, quantitative safety indicators, and staged interception strategies, this review highlights how safer ...
Jin Hyeok Yang, Jae Yoon Sung, Hyunji Kweon, Seohyun Kim, Byunghoon Kim, Jongsoon Kim, Junyoung Mun, Jung Ho Kim, Ki Jae Kim   +8 more
wiley   +1 more source

A Novel Approach To Modelling And Simulation Of The Dynamic Behaviour Of The Wheel-Rail Interface

, 2011
This paper presents a novel approach to modelling and simulation of the dynamic behaviour of rail-wheel interface. The proposed dynamic wheel-rail contact model comprises wheel-rail geometry and efficient solutions for normal and tangential contact ...
Gu, Fengshou, Pislaru, Crinela, A. Anyakwo, A. Ball, Gu, F., Anyakwo, A., F. Gu, Anyakwo, Arthur, C. Pislaru, Pislaru, C., Ball, Andrew, Fengshou, Gu, Ball, A.   +12 more
core   +1 more source

PPO‐Based Reinforcement Learning for the Semi‐Active Vibration Control of MDOF Platform

AI &Innovation, EarlyView.
ABSTRACT Aiming at the coupled vibration problem of a multi‐degree‐of‐freedom (MDOF) vibration isolation platform under eccentric excitation, this paper proposes a semi‐active vibration control strategy based on Proximal Policy Optimization (PPO) ‐based reinforcement learning (PPO RL).
Wei Huang, Jian Xu
wiley   +1 more source

Comparison of Methods Analyzing Bifurcation and Hunting of Complex Rail Vehicle Models

, 2012
The stability assessment is an important task in the mechanical design of railway vehicles. For a detailed model of a railway passenger coach, the hunting behavior depending on the running speed, on wheel-rail contact conditions, and on different model ...
Polach, Oldrich, Kaiser, Ingo
core   +1 more source