Results 1 to 10 of about 133 (123)
Nonlinear stability analysis of whirl flutter in a rotor-nacelle system [PDF]
Nonlinear Dynamics, 2018 Whirl flutter is an aeroelastic instability that affects propellers/rotors and the surrounding airframe structure on which they are mounted. Whirl flutter analysis gets progressively more complicated with the addition of nonlinear effects. This paper investigates the impact of nonlinear pylon stiffness on the whirl flutter stability of a basic rotor ...
C Mair +2 more
exaly +6 more sources
Whirl Flutter Suppression of Tiltrotor Aircraft Using Actively Controlled Aileron
Aerospace, 2022 Whirl flutter of a tiltrotor aircraft is a complex aeroelastic phenomenon and it can result in catastrophic consequences. The deflection of an aileron mounted on a wing has the potential to solve this fatal problem.
Linghua Dong, Qiyu Li
exaly +3 more sources
Nonlinear Analysis and Bifurcation Characteristics of Whirl Flutter in Unmanned Aerial Systems
Drones, 2021 Aerial drones have improved significantly over the recent decades with stronger and smaller motors, more powerful propellers, and overall optimization of systems.
Rui Vasconcellos +2 more
exaly +3 more sources
Aerospace, 2022 The tiltrotor wing structure is one of the most critical and heavily investigated structures in design due to the fundamental need to consider the interactions between the wing, pylon, and rotor systems to achieve aircraft aeroelastic stability.
Aniello Daniele Marano +8 more
doaj +1 more source
Whirl flutter optimisation-based solution of twin turboprop aircraft using a full-span model
Applied and Computational Mechanics, 2017 Whirl flutter is a specific type of flutter instability, relevant for turboprop aircraft, caused by the effect of rotating parts as a propeller or a gas-turbine engine rotor.
Čečrdle J.
doaj +1 more source
Whirl Flutter Investigation of Hingeless Proprotors
Proceedings of the Vertical Flight Society 75th Annual Forum and Technology Display, 2019 Hingeless proprotor whirl flutter in cruise flight is investigated using comprehensive rotorcraft analysis codes CAM- RAD II and RCAS. Generic hingeless proprotor designs include conventional soft-inplane and stiff-inplane rotors operating at cruise tip speeds typical of existing tiltrotor systems, and a rotor which exhibits higher frequencies and ...
Hyeonsoo Yeo, Andrew R. Kreshock
openaire +1 more source
Angewandte Chemie, EarlyView.A non‐contact computer vision method enables monitoring and quantitative comparison of vessel‐specific CO release kinetics from structurally diverse surrogates in two‐chamber COware reactors, revealing that surrogate reactivity scores correlate with carbonylation reaction outcomes.
Kristin Donnachie +4 more
wiley +2 more sources
Applied SciencesAircraft configurations with propellers have been drawing more attention in recent times, partly due to new propulsion concepts based on hydrogen fuel cells and electric motors.
Christopher Koch +4 more
doaj +1 more source
Research on Whirl‑Flutter Characteristics of Distributed Propulsive Rotorcraft
Nanjing Hangkong Hangtian Daxue XuebaoAiming at the problem of whirl-flutter dynamics of distributed propulsion rotorcraft in high-speed forward flight state， this paper proposes a highly versatile， fast and efficient distributed multi-rotor/tilt-wing coupled aeroelastic dynamics analysis ...
CHENG Yi +3 more
doaj +1 more source
The Future of Research in Cognitive Robotics: Foundation Models or Developmental Cognitive Models?
Advanced Robotics Research, EarlyView.Research in cognitive robotics founded on principles of developmental psychology and enactive cognitive science would yield what we seek in autonomous robots: the ability to perceive its environment, learn from experience, anticipate the outcome of events, act to pursue goals, and adapt to changing circumstances without resorting to training with ...
David Vernon
wiley +1 more source