نتایج جستجو برای: fighter aircraft
تعداد نتایج: 25914 فیلتر نتایج به سال:
A quasi-tailless flight investigation was launched using the X-31A enhanced fighter maneuverability airplane. In-flight simulations were used to assess the effect of partial to total vertical tail removal. The rudder control surface was used to cancel the stabilizing effects of the vertical tail, and yaw thrust vector commands were used to restabilize and control the airplane. The quasi-tailles...
زمانیکه هواپیمای جنگنده پیشرفته در زوایای حمله بالا پرواز می کند، کوپلینگ اینرسی، تاثیرات آیرودینامیک ناپایا، لرزش بال(wing rock) و اشباع سطوح کنترل آیرودینامیکی منجر به اشکال در کنترل و مانورپذیری می شوند. هواپیماهای مدرن مستلزم مانورپذیری بالا هستند. دینامیک غیرخطی پیچیده بیان شده به سادگی توسط مدلهای خطی نمی تواند تخمین زده شود. همچنین از آنجایی که کنترلرهای خطی برای رسیدن به عملکرد و پایدار...
Radar warning systems are found in all modern fighter aircraft and their main purpose is to warn pilots of enemy military units such as radar stations, aircraft and missiles. Testing these systems for fighters in real life is an expensive, complex and somewhat dangerous task. Hence engineers aim to test these systems in an artificial environment by the use of software in order to simulate hour-...
We present a discrete-event simulation model for maintenance operations of a fleet of fighter aircraft in crisis situations, where the fleet operations are affected by a threat of an enemy's actions. The model describes the flight process and basic modes of periodic maintenance and failure repairs. Features that are specific to crisis situations include battle damages of the aircraft, decentral...
This paper presents a neural-aided controller that enhances the fault tolerant capabilities of a high performance fighter aircraft during the landing phase when subjected to severe winds and failures such as stuck control surfaces. The controller architecture uses a neural controller aiding an existing conventional controller. The neural controller uses a feedback error learning mechanism and e...
This paper presents the development of a dynamic Active Noise Control (ANC) algorithm aimed towards reducing broadband noise inside helmet earcups fighter aircraft pilot helmet. The ANC involves Variable Step-Size Griffiths (VSSG) FxLMS to attenuate entering directly through helmet, LMS based adaptive canceller microphone, and energy detectors for failure protection optimized battery power usag...
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