Results 81 to 90 of about 10,512 (232)

Dynamic Characteristics and Feedforward Control Methods of Magnetic Bearing Flywheels Under Moving Base Conditions

open access: yesApplied Sciences
Magnetic bearing flywheels, characterized by frictionless operation and long service life, are increasingly recognized as promising actuators for spacecraft attitude control.
Yuan Zeng, Peng Xiao, Jingbo Wei
doaj   +1 more source

Membrane Engineering for Battery Systems: Bridging Design Principles and Frontier Applications

open access: yesENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 3, May 2026.
The review emphasizes membrane separators' role in battery performance and safety, covering redox flow, lithium‐ion, and solid‐state batteries. It reviews advances in membrane materials (e.g., polymer electrolytes, hybrid composites) and ion transport mechanisms, while addressing challenges like dendrite growth and crossover losses.
Xiaoqun Zhou   +3 more
wiley   +1 more source

Solar Energy in 2025: Global Deployment, Cost Trends, and the Role of Energy Storage in Enabling a Resilient Smart Energy Infrastructure

open access: yesENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 3, May 2026.
This paper explores global solar PV deployment, cost trends, and grid integration challenges in 2025. It examines the role of energy storage in firming solar output and supporting electric vehicle (EV) growth, alongside policy shifts, investment flows, and technological innovations.
Ehsan Rezaee, S. Ravi P. Silva
wiley   +1 more source

VARIABLE FLYWHEEL

open access: yesAvtomobilʹnyj Transport (Harʹkov), 2009
A new design of a variable flywheel for the internal combustion engine is suggested.
A. Ilchenko, V. Lomakin
openaire   +1 more source

A laboratory facility for electric vehicle propulsion system testing [PDF]

open access: yes
The road load simulator facility located at the NASA Lewis Research Center enables a propulsion system or any of its components to be evaluated under a realistic vehicle inertia and road loads.
Sargent, N. B.
core   +1 more source

Observer-biased bearing condition monitoring: from fault detection to multi-fault classification [PDF]

open access: yes, 2016
Bearings are simultaneously a fundamental component and one of the principal causes of failure in rotary machinery. The work focuses on the employment of fuzzy clustering for bearing condition monitoring, i.e., fault detection and classification.
Cabrera, Diego   +6 more
core   +1 more source

Free-flying solar reflector spacecraft [PDF]

open access: yes, 1981
Results of investigations of requirements and design concepts for large solar-reflecting spacecraft are given. The emphasis is on the one kilometer diameter self contained spacecraft that can be packaged and launched in the space shuttle.
Hedgepeth, J. M.
core   +1 more source

Sizing and Energy Management of a Hybrid Locomotive Based on Flywheel and Accumulators [PDF]

open access: yes, 2009
The French National Railways Company (SNCF) is interested in the design of a hybrid locomotive based on various storage devices (accumulator, flywheel, and ultracapacitor) and fed by a diesel generator.
Akli, Cossi Rockys   +4 more
core   +2 more sources

An Innovative Mechanical Approach to Mitigating Torque Fluctuations in IC Engines during Idle Operation

open access: yesDesigns
Internal combustion engines have been a major contributor to air pollution. Replacing these engines with electric propulsion systems presents significant challenges due to different countries’ needs and limitations.
Daniel Silva Cardoso   +3 more
doaj   +1 more source

Simulation and Test Study of Transmission Rattle Sensitivity

open access: yesJixie chuandong, 2021
Taking a DCT transmission preliminary gear 3 to 2 as an example,through the analysis of rattle theory and influence factors,the precise comparison verification result between simulation and test of rattle sensitivity are obtained.
Lü Pin   +5 more
doaj  

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