Negative aerodynamic damping causes tower vibrations on turbines with stall rotors. Under certain conditions, these vibrations may rise to a level that causes a shutdown. Active stall turbines have a pitch system, and the objective of the work was to develop pitch control algorithms which would minimise the probability of tower vibrations rising to the shutdown level. The results of a root caus...

In this paper, tuned mass dampers with optimal parameters for long span transmission tower-line system are investigated. Equations of motion for a structure-TMD system are derived, and the parameters of TMD, stiffness and damping are optimized, respectively. According to a real project, three-dimensional finite element models of both transmission tower and transmission tower-line system are cre...

This paper seeks to inform the ongoing redesign of air traffic management by examining current practices and the adoption of a new system aiming to relieve traffic control from work and reduce radio communication. We report from ethnographic fieldwork among mobile, distributed airport ground personnel. By examining the ways in which they use the ‘old’ technology, i.e. VHF radio, we identify a s...

In the United States, over 2,400 of 2,941 non-primary National Plan Integrated Airport System airports have limited means establishing operations counts due to lack available personnel. Precise airport are helpful for allocating improvement funds, as well local and system planning. An emerging technology utilizing ADS-B position data calibrate signal strength received from Mode C transponders, ...

Digital tower using video-panorama display permits the provision of air traffic services remotely without need for a local physical tower. The recent growth visual science has demonstrated popular concept in respect size “bigger is better”. aim this research to examine sizes Out-the-Window (OTW) panoramic displays and how they affect controller's behaviours, response time workload. There are tw...

We present a multiagent decision mechanism for the airport traffic control domain. It enables airlines to jointly decide on proposals for plan conflict solutions. The mechanism uses weighted voting for maximizing global utility and Clarke Tax to discourage manipulation. We introduce accounts to ensure that all agents are treated fairly, to some extent. The mechanism allows an airport to determi...

Preliminary communication The aim of the operation of the security control system at an airport is the prevention of the introduction of forbidden objects to the restricted area of the airport or onto the plane. All passengers and their luggage undergo security control. The security control system is a very specific system. On the one hand, the security control must be performed effectively so ...

The main purpose of optimized sequencing of landing/taking-o® operations is to obtain a better exploitation of the existing airport infrastructure, thus improving the performances of the entire ATC system. In this paper we deal with innovative sequencing models for managing arrivals and departures times of the aircrafts at an airport. These models are based on the so-called alternative graph fo...