The purpose of this paper is to develop the multiobjective optimization model in order to evaluate suppliers for aircraft maintenance tasks, using goal programming. The authors have developed a two-step process. The model will firstly be used as a decision-support tool for managing demand, by using aircraft and flight schedules to evaluate and generate aircraft-maintenance requirements, includi...

Recently the Russian government issued a mandate on the use of their GLObal NAvigation Satellite System (GLONASS) for Russian operated aircraft [1]. There is some concern and uncertainty both in exactly what is required to satisfy the mandate and how best to conform to it. GLONASS recently re-established full operating capability and has 24 operational satellites in orbit. The addition of a sec...

Airspace encounter models, which provide realistic close encounter situations representative of the airspace, are a critical component in the safety assessment of sense and avoid (SAA) systems. Of particular relevance to Unmanned Aircraft Systems (UAS) is the potential for encountering general aviation aircraft that are flying under Visual Flight Rules (VFR) and which may not be in contact with...

Airspace encounter models, which provide realistic close encounter situations representative of the airspace, are a critical component in the safety assessment of sense and avoid (SAA) systems. Of particular relevance to Unmanned Aircraft Systems (UAS) is the potential for encountering general aviation aircraft that are flying under Visual Flight Rules (VFR) and which may not be in contact with...

An investigation was conducted to evaluate the effectiveness of a passive gust alleviation device (PGAD) installed in flying-wing aircraft 62.3 m wing span at large swept back angle. It performed by numerical analysis and validated wind-tunnel test 1:25 reduced scale physical model dynamic similarity full-scale aircraft. The 1- cosine with range parameters specified airworthiness regulation CS-...

The present article considers the application of robust H∞ filters for nonlinear aircraft models in cruise flight conditions. The achieved performance of various design scenarios are first compared with the best achievable lower bound, calculated using frequency-gridding method. The synthesis problem is than validated on the linear uncertain aircraft model, later on the nonlinear, high-fidelity...

Introduction The latest studies of the overall characteristics of hypersonic flying vehicles with airbreathing engines have shown that these vehicles are fairly promising. Some additional problems arise, however, that are related to the definition of the general shape of the aircraft, the choice of propulsion type and operation regimes, the engine size and position on the aircraft body. There h...

Measuring the infrared signature of large civilian aircraft has become increasingly important due to the proliferation of man-portable air defense systems (MANPADS) and the increasing threat of their use by terrorists. Because of the range of these shoulderfired weapons, most aircraft flying over 20,000 feet are safe from the threat; however, aircraft taking-off or landing are extremely vulnera...

As unmanned aerial vehicles (UAVs) become more involved in challenging mission objectives, the need for agility controlled flight becomes more of a necessity. The ability to navigate through constrained environments as well as quickly maneuver to each mission target is essential. Currently, individual vehicles are developed with a particular mission objective, whether it be persistent surveilla...