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Full-Text Articles in Aerospace Engineering
Development And Implementation Of A Propeller Test Capability For Gl-10 "Greased Lightning" Propeller Design, Brian Edward Duvall
Development And Implementation Of A Propeller Test Capability For Gl-10 "Greased Lightning" Propeller Design, Brian Edward Duvall
Mechanical & Aerospace Engineering Theses & Dissertations
Interest in small unmanned aerial vehicles has increased dramatically in recent years. Hybrid vehicles which allow forward flight as a fixed wing aircraft and a true vertical landing capability have always had applications. Management of the available energy and noise associated with electric propeller propulsion systems presents many challenges. NASA Langley has developed the Greased Lightning 10 (GL-10) vertical takeoff, unmanned aerial vehicle with ten individual motors and propellers. All are used for propulsion during takeoff and contribute to acoustic noise pollution which is an identified nuisance to the surrounding users. A propeller test capability was developed to gain an …
Modeling Of Reliability And Performance Assessment Of A Dissimilar Redundancy Actuation System With Failure Monitoring, Wang Shaoping, Cui Xiaoyu, Shi Jian, Mileta M. Tomovic, Jiao Zongxia
Modeling Of Reliability And Performance Assessment Of A Dissimilar Redundancy Actuation System With Failure Monitoring, Wang Shaoping, Cui Xiaoyu, Shi Jian, Mileta M. Tomovic, Jiao Zongxia
Engineering Technology Faculty Publications
Actuation system is a vital system in an aircraft, providing the force necessary to move flight control surfaces. The system has a significant influence on the overall aircraft performance and its safety. In order to further increase already high reliability and safety, Airbus has implemented a dissimilar redundancy actuation system (DRAS) in its aircraft. The DRAS consists of a hydraulic actuation system (HAS) and an electro-hydrostatic actuation system (EHAS), in which the HAS utilizes a hydraulic source (HS) to move the control surface and the EHAS utilizes an electrical supply (ES) to provide the motion force. This paper focuses on …