Results 121 to 130 of about 542,371 (346)

Subsonic flight test evaluation of a propulsion system parameter estimation process for the F100 engine [PDF]

Integrated engine-airframe optimal control technology may significantly improve aircraft performance. This technology requires a reliable and accurate parameter estimator to predict unmeasured variables.
Gilyard, Glenn B., Orme, John S.
core   +1 more source

Subterranean Mine Inspection Using the Prometheus Re‐Configurable Drone

Journal of Field Robotics, EarlyView.
ABSTRACT This paper describes the design, development, and real‐world testing of an autonomous drone for subterranean exploration, known as “Prometheus.” Driven by requirements from industry that the drone be able to be deployed through areas of restricted access, Prometheus was designed to be directly deployed through a 150 mm aperture.
Liam Brown, Robert Clarke, Ali Akbari, Ferdian Jovan, Jameel Marafie, Ognjen Marjanovic, Sara Bernardini, Tom Richardson, Simon Watson   +8 more
wiley   +1 more source

A Review of Novel and Non-Conventional Propulsion Integrations for Next-Generation Aircraft

Designs
The aim of this review paper is to collect and discuss the most relevant and updated contributions in the literature regarding studies on new or non-conventional technologies for propulsion–airframe integration.
K. Abu Salem, G. Palaia, P. D. Bravo-Mosquera, A. Quarta   +3 more
semanticscholar   +1 more source

Future Air Force aircraft propulsion control systems: The extended summary paper [PDF]

Hydromechanical control technology simply cannot compete against the performance benefits offered by electronics. Future military aircraft propulsion control systems will be full authority, digital electronic, microprocessor base systems.
Skira, C. A.
core   +1 more source

Progress of MXenes‐based responsive materials for soft sensors and actuators

Responsive Materials, EarlyView.
MXene, a promising 2D material, excels at mimicking human sensing and feedback system, making it ideal for intelligent robots. This review first covers its structure, properties, and synthesis. It then summarizes recent MXene‐based sensors and actuator.
Peidi Zhou, Wenjie Yang, Yihan Qiu, Meiping Xu, Leiting Liao, Xinlei Gong, Chan Zheng, Minghua You, Cheng Zhang, Huamin Chen, Mingcen Weng   +10 more
wiley   +1 more source

Hypersonic aircraft design [PDF]

A hypersonic aircraft is designed which uses scramjets to accelerate from Mach 6 to Mach 10 and sustain that speed for two minutes. Different propulsion systems were considered and it was decided that the aircraft would use one full scale turbofan-ramjet.
Alkamhawi, Hani, Fuerst, Gerry, Greiner, Tom, Luich, Shawn, Stonebraker, Bob, Wray, Todd   +5 more
core   +1 more source

Highly Dynamic Soft Electrohydraulic Origami Actuators for Agile and Multimodal Robotic Locomotion

SmartBot, EarlyView.
Most current soft robots still lag far behind their natural counterparts in both agility and speed, mainly attributed to the limited morphing modes and performance of soft actuators. Here, the authors report a new methodology of electrohydraulic origami (EHO) for creating powerful and multimodal soft actuators with large strain, high speed, lightweight,
Wenbo Li, Yuanzhen Zhang, Guorui Li, Hai Li, Kai Tao, Wenming Zhang, Jian Xu   +6 more
wiley   +1 more source

The handling qualities and flight characteristics of the Grumman design 698 simulated twin-engine tilt Nacelle V/STOL aircraft [PDF]

This paper describes three government-conducted, piloted flight simulations of the Grumman Design 698 vertical and short takeoff and landing (V/STOL) aircraft.
Eskey, M. A., Wilson, S. B., III
core   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

Strategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani, Mariano Mastrogiorgio, Giuseppe Carignani   +2 more
wiley   +1 more source

NASA research in aircraft propulsion [PDF]

A broad overview of the scope of research presently being supported by NASA in aircraft propulsion is presented with emphasis on Lewis Research Center activities related to civil air transports, CTOL and V/STOL systems. Aircraft systems work is performed
Beheim, M. A.
core   +1 more source