Results 61 to 70 of about 29,751 (218)
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
Hypersonic aerodynamics on thin bodies with interaction and upstream influence [PDF]
, 1994 In the fundamental configuration studied here, a steady hypersonic free stream flows over a thin sharp aligned airfoil or flat plate with a leading-edge shock wave, and the flow field in the shock layer (containing a viscous and an inviscid layer) is ...
Khorrami, AF, Smith, FT
core
AerospaceAdvanced airborne power generation technology represents one of the most effective solutions for meeting the electricity requirements of hypersonic vehicles during long-endurance flights.
Yiming Liu +3 more
doaj +1 more source
Large‐Scale Applications of Plasma Technologies: Progresses and Challenges
High Voltage, EarlyView.ABSTRACT Plasma technologies convert electrical power into energetic electrons, ions, reactive species, radiation and heat, thereby breaking through the bottleneck of purely thermal or chemical routes and bringing impressive changes to our world. This roadmap reviews the progress and challenges of plasma technologies from a large‐scale and application ...
Pankaj Attri +51 more
wiley +1 more source
The Political Quarterly, EarlyView.Abstract This article argues that the current debate over defence spending in the United Kingdom is fundamentally flawed. Too much emphasis is being placed on preparing for a form of warfare with Russia that is unlikely to occur. As this article points out, the Russians actually want to avoid a traditional battlefield confrontation with NATO.
Rod Thornton
wiley +1 more source
A Proposal for Long-Term Missions of Small Lunar Rovers Using an MLI Curtain System
International Journal of Aerospace Engineering, 2019 This paper proposes a lunar night survival method for small rovers using an MLI (Multilayer Insulation) curtain system for long-term missions. Until recently, it was difficult to install RHU (Radioisotope Heating Units) or other temperature maintenance ...
Jang-Joon Lee, Kyu-Hong Kim
doaj +1 more source
Evolving Geopolitics and Japan's Economic Security–Trade Nexus: ‘New Capitalism’ as a Balancing Act?
Global Policy, EarlyView.ABSTRACT Amid intensifying geopolitical tensions, governments increasingly perceive economic interdependence as a strategic vulnerability. Japan, situated geopolitically between two great powers—the United States and China—attempts to navigate geopolitics by prioritising economic security.
Minako Morita‐Jaeger
wiley +1 more source
Theoretical and Applied Mechanics LettersThe stability of supersonic inlets faces challenges due to various changes in flight conditions, and flow control methods that address shock wave/boundary layer interactions under only one set of conditions cannot meet developmental requirements.
Shan-Shan Tian +4 more
doaj +1 more source
The Unintended Consequences of German Deterrence
Global Policy, EarlyView.ABSTRACT Germany's evolving deterrence posture boils down to continued participation in NATO nuclear sharing and an ambitious conventional rearmament program. Due to its non‐nuclear status and a result of decades of underinvestment, Germany prioritizes modern conventional weapons.
Ulrich Kühn
wiley +1 more source
The Shefex Flight Experiment - Pathfinder Experiment for a Sky Based Test Facility [PDF]
, 2006 On Thursday, October 27th, 2005 the SHarp Edge Flight EXperiment SHEFEX has been successfully launched at the Andoya Rocket Range in northern Norway.
Ali Gülhan +28 more
core +1 more source