Part I describes an intelligent acoustic emission locator, while Part II discusses blind source separation, time delay estimation and location of two continuous acoustic emission sources. Acoustic emission (AE) analysis is used for characterization and location of developing defects in materials. AE sources often generate a mixture of various statistically independent signals. A difficult probl...

In today’s aviation system, air traffic controllers manage the separation between aircraft primarily using radar displays to visualize the aircraft positions and their trajectories. They are aided by basic automated decision support tools that predict potential future conflicts. When controllers determine an aircraft must be maneuvered, they advise the aircraft flight crew using two-way radio c...

The pilot is the main person in charge of taxiing safety while moving on airport surface. visual separation and speed adjustment are directly related to efficiency surface operation. According actual procedures control rules China, this paper proposes a novel microscopic simulation model based pilots’ separation. This also built by refining aircraft at intersections. observation range, judgment...

, Leading edge flows, present in the incidence range embracing the onset of general nose separation, have been studied experimentally. The effect of nose droop of these flows was established during the development of this device as a possible alternative to leading-edge flaps on the aircraft. Discrete air jets and vane type vortex generators were investigated in regard to both boundary-layer an...

This paper is a continuation of [1] and [2], where two algorithms were introduced, allocating optimal separated 3D-trajectories to the main traffic flows. The reader may also refer to [3] (PhD thesis, in french) for more details. In [1], these algorithms – an A∗ algorithm for the sequential strategy, and an evolutionary algorithm for the global optimization – were tried on a toy problem, and th...

A human-in-the-loop simulation was conducted to evaluate advanced controller support tools and display enhancements in terminal airspace. Terminal-area air traffic controllers managed aircraft arriving on optimized profile descents along Area Navigation routes following runway arrival schedules using only speed clearances in the presence of forecast wind errors and other disturbances. Three suc...

Air traffic management (ATM) aims at providing companies with a safe and ideally optimal aircraft trajectory planning. Air traffic controllers act on flight paths in such a way that no pair of aircraft come closer than the regulatory separation norm. With the increase of traffic, it is expected that the system will reach its limits in a near future: a paradigm change in ATM is planned with the ...

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...

Guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. In this study automatic landing control systems are introduced and an optimal landing control system is designed. The control system performance criteria are based on minimum control effort. The designed system is simulated for a tr...

This paper describes an initial human-in-the-loop part-task study on service providerbased automated separation assurance for the Next Generation Air Transportation System (NextGen). The study varied levels of trajectory-based separation assurance automation from manual trial planning to fully automated conflict resolution over 1x, 2x and 3x traffic densities. The experiment was conducted in th...