نتایج جستجو برای: flight envelope
تعداد نتایج: 83939 فیلتر نتایج به سال:
In this paper a new guidance technique for ballistic missiles and launch vehicles is proposed. Generally the Lambert guidance is used to generate missile nominal (correlated) parameters through powered flight to put it in a ballistic flight path. Because of uncertainties and undesired factors, the nominal position and velocity obtained by Lambert technique need to be followed in actual flight. ...
چکیده ندارد.
This paper describes the design of a switching scheme for integrated flight and propulsion control of a vertical/short takeoff land (V/STOL) aircraft throughout the hover and transition regions of its flight envelope. The approach adopted makes use of a recently introduced bumpless transfer technique and presents a methodology for switching between multiple controllers while limiting on-line co...
Abstract: The purpose of this paper is to design and evaluate the construction of a lightweight solar aircraft that is capable of flying continuously for 24 hours relying solely on solar energy. The required energy is absorbed during the day by solar panels, some is used directly for flight, and the excess energy is stored in the aircraft battery for overnight flight. The aircraft will then be ...
The flutter phenomenon is a potentially destructive aeroelastic vibration studied for the design of aircraft structures as it limits flight envelope aircraft. aim this work to propose heuristic piezoelectric actuator-based controller suppression in order extend allowable speed range structure. Based on numerical model three degrees freedom (3DOF) airfoil and taking into account FEM V-stack actu...
licorice, the oldest chinese traditional medicine, is widely used in the treatment of human diseases. due to the deficiency of wild resource, selecting and breeding becomes a key issue to expanding the supply of licorice. spaceflight technology will become a new method for medicinal plants. the aim of this study was to investigate the effect of spaceflight on the components and anti-inflammator...
Abstract In this paper, the authors propose, investigate, and discuss a concept of novel type deployable helium-filled aerostat as low-cost mean transport. Internal construction is based on ultra-light tensegrity structure equipped with prestressed tensioned elements controllable lengths. Such allows for adaptive morphing understood simultaneous modifications volume shape during flight. The con...
This paper focuses on full six degree-of-freedom (6-DOF) aerodynamic modeling of small UAVs at high angles of attack and high sideslip in maneuvers performed using large control surfaces at large deflections for aircraft with high thrust-to-weight ratios. Configurations such as this include many of the currently available propellerdriven RC-model airplanes that have control surfaces as large as...
Aim: The purpose of the present study was to explain the human interactions affecting the psychological preparation of airline pilots. Methods: Qualitative approach and thematic analytical method was used to conduct this study. The study population in this research were the pilots of an airline company in Tehran in 2019. In order to gather the necessary data, pilots were selected through purpos...
due to the important role of subsurface drainage in managing the ground water level, there are many researches focused on finding a new and more economic way to develop subsurface drainage technologies. lack of proper drainage system in northern iran has caused huge implantation of rice and it is impossible to have second implantation in this region. one reason of insufficiency of current drain...
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