The Leicester modifications have effectively compensated for an inherent design limitation that has led to several disastrous crashes - most notably the JAS-29 during an air show in Stockholm and the YF-22.
Man-machine interactions in aircraft can lead to so-called pilot involved/in-the-loop oscillations (PIOs) which can compromise aircraft performance and safety. PIOs have therefore become a major concern for the European and US aerospace industry.
The University of Leicester Department of Engineering has been a member of the European GARTEUR (Group for Aeronautical Research and Technology in Europe) Action Group AG15 for the past three years. The group's aim is to develop techniques which allow the prediction and prevention of PIOs.
Over the past several years Leicester has developed control design techniques ("anti-windup compensators") which can be added to existing aircraft control systems to lessen susceptibility to PIOs. Extensive mathematical development and computer simulation has matured these techniques but until summer 2006 no in-flight testing was performed.
Recently, a team of engineers from Leicester, the German Aerospace Center (DLR) and test pilots from the German Armed Forces Flight Test Centre (WTD61) performed in-flight tests of these "PIO prevention" compensators on the DLR ATTAS (Advanced Technologies Testing Aircraft System) experimental aircraft.
During this flight test campaign, termed SAIFE (Saturation Alleviation In-Flight Experiment), the ATTAS aircraft was deployed in scenarios which were expected to lead to PIO type events and data and pilot comments were collected both with and without the Leicester compensators engaged.
University of Leicester engineer Dr Matthew Turner commented: “Pilot comments showed that with the Leicester compensators engaged, the aircraft was significantly less PIO prone than without. Moreover, the aircraft was deemed to have more predictable handling qualities overall, which was an added bonus.
“In fact in every single manoeuvre the aircraft performed as well as or better than normal, when the Leicester compensators were engaged.”
The results were well-received within the GARTEUR action group and further flight tests are planned - again jointly with DLR and WTD61 - in April 2007.
Alex Jelley | alfa
A helping (Sens)Hand
11.04.2018 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO
Study sets new distance record for medical drone transport
13.09.2017 | Johns Hopkins Medicine
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences