Hybrid unmanned aerial vehicles (UAVs) provide an interesting combination of the vertical takeoff and landing (VTOL) capabilities rotary-wing (RW) efficient forward flight fixed-wing (FW) vehicles. The employed controllers must be able to handle highly nonlinear dynamics changing control authorities resulting from this combination, especially during transition between two modes. In paper, a mod...

owe much of their extraordinary evolutionary success to flight. Compared with their flightless ancestors, flying insects are better equipped to evade predators, search food sources and colonize new habitats. Because their survival and evolution depend so crucially on flight performance, it is hardly surprising that the flight-related sensory, physiological, behavioral and biomechanical traits o...

the air transport industry is seeking to manage risks in air travels. its main objective is to detect abnormal behaviors in various flight conditions. the current methods have some limitations and are based on studying the risks and measuring the effective parameters. these parameters do not remove the dependency of a flight process on the time and human decisions. in this paper, we used an hmm...

conclusions: thus, identifying the hf patients before the flight and providing them proper education about the events that may occur during flight is necessary. results: hf patients are more prone to experience respiratory distress, anxiety, stress, cardiac decompensation, and venous thromboembolism (vte) during air travel. although stable hf patients can tolerate air travel, but those with acu...

This work reviews the effect of parametric programming on visual performance, daylighting and shading in office buildings in Tehran-Iran and studies their influences that help not only to reduce the glare but also to promote useful daylight illuminance through promoting visual comfort. It starts by establishing a review of the effective parameters on visual comfort indices, glare indices, and d...

Since modern transport aircraft cruise at transonic speeds, shock buffet alleviation is one indispensable challenge that civil research needs to be addressed. Indeed, in the flow regime shock-induced separation and compromise flight envelope of an aircraft, therefore its operational safety structural integrity. One possible solution control delay boundary layer separation. The aim this work was...

This paper proposes a novel control law for accurate tracking of agile trajectories using tailsitter flying wing unmanned aerial vehicle that transitions between vertical takeoff and landing forward flight. The global formulation enables maneuvering throughout the flight envelope, including uncoordinated with sideslip. Differential flatness nonlinear dynamics simplified aerodynamics model is sh...