Results 1 to 10 of about 7,895 (248)
Intelligent Situational Control of Small Turbojet Engines
International Journal of Aerospace Engineering, 2018 Improvements in reliability, safety, and operational efficiency of aeroengines can be brought in a cost-effective way using advanced control concepts, thus requiring only software updates of their digital control systems.
Rudolf Andoga +6 more
doaj +3 more sources
Aerospace, 2022 Turbojet engines have a slow response and require mechanical assistance to perform vertical take-offs and landings. In this paper, we propose a vertical take-off and landing (VTOL) aircraft that contains one-dimensional thrust vectoring nozzle modules to
Benshan Liu +6 more
doaj +2 more sources
Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen
Aerospace, 2022 This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi +5 more
doaj +2 more sources
Single Neural Adaptive PID Control for Small UAV Micro-Turbojet Engine. [PDF]
Sensors (Basel), 2020 The micro-turbojet engine (MTE) is especially suitable for unmanned aerial vehicles (UAVs). Because the rotor speed is proportional to the thrust force, the accurate speed tracking control is indispensable for MTE.
Tang W, Wang L, Gu J, Gu Y.
europepmc +2 more sources
Advanced Control of an Electric Fuel-Oil Pump for Small Turbojet Engines
Aerospace, 2022 One way to efficiently control the fuel flow of small turbojet engines is to use direct control of the speed of a suitable electric fuel pump, as opposed to using relief valves.
Ladislav Főző, Rudolf Andoga
doaj +2 more sources
Impact of Using Chevrons Nozzle on the Acoustics and Performances of a Micro Turbojet Engine
Applied Sciences, 2021 This paper presents a study regarding the noise reduction of the turbojet engine, in particular the jet noise of a micro turbojet engine. The results of the measurement campaign are presented followed by a performances analysis which is based on the ...
Grigore Cican +2 more
doaj +2 more sources
Robust Control of Small Turbojet Engines [PDF]
Machines, 2019 Modern turbojet engines mainly use computerized digital engine control systems. This opens the way for application of advanced algorithms aimed at increasing their operational efficiency and safety.
Rudolf Andoga +5 more
doaj +4 more sources
Control-Oriented System Identification of Turbojet Dynamics
AerospaceThe autonomous operation of turbojets requires reliable, accurate, and manageable dynamical models for several key processes. This article describes a practical robust method for obtaining turbojet thrust and shaft speed models from experimental data ...
Francisco Villarreal-Valderrama +5 more
doaj +2 more sources
Aviation, 2019 Micro turbojets can be used for propulsion of civilian and military aircraft, consequently their investigation and control is essential. Although these power plants exhibit nonlinear behaviour, their control can be based on linearized mathematical models
Khaoula Derbel, Károly Beneda
doaj +3 more sources
Making High Thermoelectric and Superior Mechanical Performance Nb0.88Hf0.12FeSb Half-Heusler via Additive Manufacturing. [PDF]
Adv Sci (Weinh)Nb0.88Hf0.12FeSb, a half‐Heusler thermoelectric material for energy harvesting, exhibits a very promising thermoelectric figure of merit ZT ≈ 100 °C. With the application of laser‐based 3D printing technique onto high‐quality spherical precursor powder, highly flexible shape‐customization, and efficient prolificacy can be further achieved with ...
Yao Z +16 more
europepmc +2 more sources