Results 221 to 230 of about 891,158 (301)
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International journal of turbo & jet-engines, 2019
A novel control method combining nonlinear model predictive control (NMPC) with linear kalman filter (LKF) and adaptive notch filter (ANF) for an integrated helicopter/engine system with variable rotor speed is proposed to enhance the response ability of
Yong Wang +3 more
semanticscholar +1 more source
A novel control method combining nonlinear model predictive control (NMPC) with linear kalman filter (LKF) and adaptive notch filter (ANF) for an integrated helicopter/engine system with variable rotor speed is proposed to enhance the response ability of
Yong Wang +3 more
semanticscholar +1 more source
Heavy Lift Helicopter Main Engines
SAE Technical Paper Series, 1973<div class="htmlview paragraph">The Heavy Lift Helicopter (HLH) is the airborne component of a container ship and helicopter logistics system. The U.S. Army initiated a program for development of advanced-technology components (ATC) for the HLH in June 1971 to reduce the risk associated with future procurement of an air vehicle.
David R. Woodley, William S. Castle
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Radar/infrared integrated stealth optimization design of helicopter engine intake and exhaust system
, 2019Along with the diversification and sophisticated development of detection methods in modern warfare, helicopters are increasingly subject to unilateral or simultaneous threats from radar and infrared detectors.
Zeyang Zhou, Jun Huang, Jinjun Wang
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, 2019
In this study, a parallel hybrid system using an electric motor and an internal combustion engine is designed for a light utility helicopter. Energy and exergy analyses were performed and evaluated for take-off phase of a Robinson R22 Beta II Light ...
Elif Koruyucu
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In this study, a parallel hybrid system using an electric motor and an internal combustion engine is designed for a light utility helicopter. Energy and exergy analyses were performed and evaluated for take-off phase of a Robinson R22 Beta II Light ...
Elif Koruyucu
semanticscholar +1 more source
HELICOPTER ENGINE-ROTOR SYSTEM COMPATIBILITY
2017<div class="section abstract"> <div class="htmlview paragraph">This SAE Aerospace Recommended Practice (ARP) recommends a methodology to be used for the design, analysis and test evaluation of modern helicopter gas turbine propulsion system stability and transient response characteristics. This methodology utilizes the computational power
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Acceleration Performance of Helicopter Engines
Journal of Engineering for Gas Turbines and Power, 1987The desirability of good acceleration behavior from helicopter gas turbine engines is discussed in the context of the increasing demand for helicopter maneuverability and safety. Features which result in improved engine handling qualities are discussed and reference is made to some analytical techniques which may be employed to assist in obtaining the ...
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A Study on Torsional Vibration Suppression Method for an Integrated Helicopter / Engine System
International journal of turbo & jet-engines, 2018In order to solve the problem of torsional vibration instability of control unit in helicopter/engine system during maneuver flight, this paper has conducted the research on the integrated torsional vibration suppression of helicopter/engine system ...
Yong Wang +3 more
semanticscholar +1 more source
2017
<div class="section abstract"> <div class="htmlview paragraph">This Aerospace Information Report (AIR) reviews the requirements to be satisfied by the engine mount systems and provides an outline of some suitable methods. Factors such as drive shaft alignment, engine expansion, mount crashworthiness, vibration isolation, and other effects
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<div class="section abstract"> <div class="htmlview paragraph">This Aerospace Information Report (AIR) reviews the requirements to be satisfied by the engine mount systems and provides an outline of some suitable methods. Factors such as drive shaft alignment, engine expansion, mount crashworthiness, vibration isolation, and other effects
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Twin Engine Helicopter Power Requirements
2017<div class="section abstract"> <div class="htmlview paragraph">This SAE Aerospace Information Report (AIR) defines the power spectrum during normal and emergency operations of a twin engine helicopter and thereby postulates suitable power plant rating structures.
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HELICOPTER TURBINE ENGINE WASH
2017<div class="section abstract"> <div class="htmlview paragraph">Engines subject to dust, industrial pollution, saltwater contamination or other chemically laden atmosphere (including pesticides and herbicides) lose performance due to deposits of contaminants on surfaces in the aidgas flow path.
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