The paper investigates the ability to learn from an aircraft accident as the opportunities for learning diminish with the decline in the accident rate. A safety compromising case is studied as the processes of aircraft accident intervention and recovery can degrade the ability of an aircraft accident investigation process to enhance aviation safety by revealing accident causation. In the case s...

Large-eddy simulations with size-resolved microphysics are used to model persistent aircraft contrails and contrail-induced cirrus from a fewwing spans behind the aircraft until their demise aftermany hours. Schemes for dynamic local ice binning and updating coupled radiation dynamically as needed in individual columns were developed for numerical efficiency, along with a scheme for maintaining...

In this paper, the problem of structural damage with partial loss vertical tail in aircraft dynamical system is investigated. A linearized aircraft model is introduced firstly, then a damage-tolerant controller based on an adaptive sliding mode control is proposed. Finally, simulations with an aircraft model are conducted to demonstrate the effectiveness and advantages of the proposed design te...

A novel fault detection and isolation (FDI) method using set-valued observers (SVOs), for uncertain linear parameter-varying (LPV) systems, is introduced. The proposed method relies on SVO-based model invalidation to discard models incompatible with measured data. When compared to the most common strategies in the literature, the suggested approach: (i) under suitable conditions, guarantees fal...

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...

The full scale aircraft fatigue test(FSAFT)is crucial for determining the fatigue life (or service life based on flight hours) of an aircraft group and for understanding its performance during whole service life. So far, FSAFT is the only means in correctly obtaining the fatigue life of an aircraft group. The early locating and finding repairable cracks and damages in critical structures of the...

The paper is concerned with conceptual modeling of the new aircraft based on bionical forms. Search visual-graphic calculations of the model under development are presented. 3D modeling of aircraft constructional parts were carried out according to the detailed designs. For 3D surfaces modeling the Koons method is used. Rendering scenes of shaded 3D model of aircraft is presented.

An aircraft is a complex machine composed of many interrelated components and systems. When these electrical and mechanical systems are designed there is an expected life length. As the aircraft and systems age they gradually degenerate until they are no longer able to perform the functions for which they were designed. When a component or system is not functional it can be replaced or repaired...

In the book “Optimal inventory modeling of systems: multi-echelon techniques” the author Craig Sherbrooke, who has developed several important model in this area, describes a part of the model cosidered in this manuscript as follows (in “aircraft language”): “When a malfunction is diagnosed on an aircraft, the malfuncioning item is removed from the aircraft and brought into base supply. If a sp...