Results 111 to 120 of about 15,513 (312)

Generator Power Optimisation for a More-Electric Aircraft by Use of a Virtual Iron Bird

, 2006
A prodedure is developed to minimise the generator design power within the electric power system of a future more-/ all-electric aircraft. This allows to save weight on the generators and on other equipment of the electic power system.
Pfeiffer, Andreas, Bals, Johann, Schallert, Christian   +2 more
core  

Concept Evaluation of Radical Short–Medium-Range Aircraft with Turbo-Electric Propulsion

Aerospace
Ambitious targets for the coming decades have been set for further reductions in aviation greenhouse gas emissions. Hybrid electric propulsion (HEP) concepts offer potential for the mitigation of these aviation emissions. To investigate this potential in
W. J. Vankan, W. F. Lammen, E. Scheers, P. J. Dewitte, Sebastien Defoort   +4 more
doaj   +1 more source

How emerging market firms learn to lead in complex product systems: Evidence from China's civil aircraft industry

Global Strategy Journal, EarlyView.
Abstract Research Summary The rise of emerging market lead firms (LFs) in global value chains (GVCs) challenges the prevailing view that only multinational corporations (MNCs) from advanced economies lead systems integration, design, and innovation activities.
Yuanyuan Wu, Paola Perez‐Aleman
wiley   +1 more source

Industry Portfolio Volatility Connections and Industry Portfolio Returns

International Journal of Finance &Economics, EarlyView.
ABSTRACT This paper tracks dynamic connections that form among daily US industry portfolio return volatilities using a Bayesian time‐varying parameter VAR model. Market participants often focus on sectors to filter vast amounts of information, and this focus results in cross‐industry return predictability. We characterise connections that form over the
Michael Ellington, Michalis Stamatogiannis, Yawen Zheng   +2 more
wiley   +1 more source

A Multi Level Approach for Aircraft Electrical Systems Design

, 2008
This paper describes the needs, ideas, implementation and application of a multi-level concept used for aircraft electrical systems design. The goal is to easily switch between three model levels in a complex system model, in order to arrive at dedicated
Kuhn, Martin, Otter, Martin, Raulin, Loic   +2 more
core  

Uncertainty, Sensitivity, and Efficiency Analysis of a Hybrid Piezoelectric–Electromagnetic Energy Harvester

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Digitalization and emerging technologies are increasing the demand for wireless sensing and the Internet of Things (IoT), which provide opportunities for autonomous sources of electricity in the form of energy harvesting systems. This paper focuses on the challenges in hybrid piezoelectric‐electromagnetic kinetic energy harvesting systems that
Petr Sosna, Damian Gaska, Zdeněk Hadaš
wiley   +1 more source

Fault Detection of Electric Motors via Symmetrized Dot Pattern‐Based Features

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study proposes a novel symmetrized dot pattern (SDP) approach using designed SDP‐based features, extracted from transformed vibration signals, for fault detection. These features describe the compactness, inclination, and shape of the “snowflake” diagram distributions.
Mario Spirto, Pierangelo Malfi, Armando Nicolella, Francesco Melluso, Chiara Cosenza, Sergio Savino, Vincenzo Niola   +6 more
wiley   +1 more source

Reliability Allocation Method for Electric Aircraft Lightweight Propulsion System

Shanghai Jiaotong Daxue xuebao
In order to solve the contradiction between lightweight and high reliability in the electric aircraft electric propulsion system, a reliability allocation method considering lightweight constraint is proposed for the first time.
LI Jinghao, LI Ran, HUA Hao, HUANG Wentao, GAO Fei, TAI Nengling
doaj   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

Assessing the structural design of fixed-wing airframes for next-generation electric aircraft

The aviation industry faces a major push for a technology transformation to electric propulsion systems as current worldwide environmental requirements demand a shift from fossil fuels to sustainable energy.
Schulte, K, Stegen, S, O'Keefe, S, Rybachuk, M   +3 more
core   +2 more sources