14 research outputs found
Model based 3D vision synthesis and analysis for production audit of installations.
PhDOne of the challenging problems in the aerospace industry is to design
an automated 3D vision system that can sense the installation components
in an assembly environment and check certain safety constraints
are duly respected. This thesis describes a concept application to aid
a safety engineer to perform an audit of a production aircraft against
safety driven installation requirements such as segregation, proximity,
orientation and trajectory. The capability is achieved using the
following steps. The initial step is to perform image capture of a
product and measurement of distance between datum points within
the product with/without reference to a planar surface. This provides
the safety engineer a means to perform measurements on a set of captured
images of the equipment they are interested in. The next step is
to reconstruct the digital model of fabricated product by using multiple
captured images to reposition parts according to the actual model.
Then, the projection onto the 3D digital reconstruction of the safety
related installation constraints, respecting the original intent of the
constraints that are defined in the digital mock up is done. The differences
between the 3D reconstruction of the actual product and the
design time digital mockup of the product are identified. Finally, the
differences/non conformances that have a relevance to safety driven
installation requirements with reference to the original safety requirement
intent are identified. The above steps together give the safety engineer
the ability to overlay a digital reconstruction that should be as
true to the fabricated product as possible so that they can see how the
product conforms or doesn't conform to the safety driven installation
requirements. The work has produced a concept demonstrator that
will be further developed in future work to address accuracy, work flow
and process efficiency. A new depth based segmentation technique
GrabcutD which is an improvement to existing Grabcut, a graph cut
based segmentation method is proposed. Conventional Grabcut relies
only on color information to achieve segmentation. However, in stereo
or multiview analysis, there is additional information that could be
also used to improve segmentation. Clearly, depth based approaches
bear the potential discriminative power of ascertaining whether the
object is nearer of farer. We show the usefulness of the approach when
stereo information is available and evaluate it using standard datasets
against state of the art result
Flight demonstrations of curved, descending approaches and automatic landings using time referenced scanning beam guidance
The Terminal Configured Vehicle (TCV) program operates a Boeing 737 modified to include a second cockpit and a large amount of experimental navigation, guidance and control equipment for research on advanced avionics systems. Demonstration flights to include curved approaches and automatic landings were tracked by a phototheodolite system. For 50 approaches during the demonstration flights, the following results were obtained: the navigation system, using TRSB guidance, delivered the aircraft onto the 3 nautical mile final approach leg with an average overshoot of 25 feet past centerline, subjet to a 2-sigma dispersion of 90 feet. Lateral tracking data showed a mean error of 4.6 feet left of centerline at the category 1 decision height (200 feet) and 2.7 feet left of centerline at the category 2 decision height (100 feet). These values were subject to a sigma dispersion of about 10 feet. Finally, the glidepath tracking errors were 2.5 feet and 3.0 feet high at the category 1 and 2 decision heights, respectively, with a 2 sigma value of 6 feet
Twelfth Annual Conference on Manual Control
Main topics discussed cover multi-task decision making, attention allocation and workload measurement, displays and controls, nonvisual displays, tracking and other psychomotor tasks, automobile driving, handling qualities and pilot ratings, remote manipulation, system identification, control models, and motion and visual cues. Sixty-five papers are included with presentations on results of analytical studies to develop and evaluate human operator models for a range of control task, vehicle dynamics and display situations; results of tests of physiological control systems and applications to medical problems; and on results of simulator and flight tests to determine display, control and dynamics effects on operator performance and workload for aircraft, automobile, and remote control systems
Proceedings of the 12th International Conference on Technology in Mathematics Teaching ICTMT 12
Innovation, inclusion, sharing and diversity are some of the words that briefly and suitably characterize the ICTMT series of biennial international conferences – the International Conference
on Technology in Mathematics Teaching. Being the twelfth of a series which began in Birmingham,
UK, in 1993, under the influential enterprise of Professor Bert Waits from Ohio State University,
this conference was held in Portugal for the first time. The 12th International Conference on
Technology in Mathematics Teaching was hosted by the Faculty of Sciences and Technology of the
University of Algarve, in the city of Faro, from 24 to 27 June 2015, and was guided by the original
spirit of its foundation.
The integration of digital technologies in mathematics education across school levels and countries,
from primary to tertiary education, together with the understanding of the phenomena involved in
the teaching and learning of mathematics in technological environments have always been driving
forces in the transformation of pedagogical practices. The possibility of joining at an international
conference a wide diversity of participants, including school mathematics teachers, lecturers,
mathematicians, mathematics educators and researchers, software designers, and curriculum
developers, is one facet that makes this conference rather unique. At the same time, it seeks to foster
the sharing of ideas, experiences, projects and studies while providing opportunities to try-out and
assess tools or didactical proposals during times of hands-on work. The ICTMT 12 had this same
ambition, when embracing and welcoming just over 120 delegates who actively and enthusiastically
contributed to a very packed program of scientific proposals and sessions on various topics
Social work with airports passengers
Social work at the airport is in to offer to passengers social services. The main
methodological position is that people are under stress, which characterized by a
particular set of characteristics in appearance and behavior. In such circumstances
passenger attracts in his actions some attention. Only person whom he trusts can help him
with the documents or psychologically
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Proceedings of the 2nd European conference on disability, virtual reality and associated technologies (ECDVRAT 1998)
The proceedings of the conferenc