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IEEE International Workshop Metrology for AeroSpace Time's Up

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We are proud to announce the following distinguished speakers 


General Keynote Address

Applications of Advanced Nondestructive Measurement Techniques to Address Safety of Flight Issues on NASA Spacecraft


prosser billDr. William H. Prosser

NASA Technical Fellow for NDE
NASA Engineering and Safety Center
Langley Research Center
MS 231
Hampton, VA 23681-0001
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Advanced nondestructive measurement techniques are critical for ensuring the reliability and safety of NASA spacecraft. These techniques are used to characterize material properties, accurately measure dimensions on complex three dimensional structures, as well as to detect indications of damage in spacecraft components and structures. Numerous examples will be discussed in which nondestructive measurement techniques have been applied to address and resolve critical safety of flight issues on NASA spacecraft. Examples on the Space Shuttle include the development and application of THz and backscatter radiographic imaging techniques to inspect foam insulation on the Shuttle external tank. Impact of foam debris that was liberated from the external tank during ascent led to the loss of the Shuttle Columbia. The Shuttle could not have resumed safe flight without these new inspection techniques to detect indications of porosity and cracking in the foam. Additionally, in the wake of the Columbia tragedy, a novel in-space infrared thermographic measurement system was developed to inspect the heat shield of the Shuttle during flight in the event that impact damage occurred. Following the end of the Shuttle program, this same thermography system was transitioned to the International Space Station (ISS) where it has been used to assess damage to radiators and other critical ISS components. Following a nearly catastrophic spacewalk accident in which there was a water leak into the helmet of the astronaut, both x-ray and neutron computed tomography measurement techniques were used to pinpoint the debris in the spacesuit components that caused the leak. Additionally, sensor and measurement systems have been developed and integrated into spacecraft to provide structural health monitoring to detect damaging events that occur during flight. Examples to be discussed include an impact monitoring system that again resulted after the Columbia accident to detect launch and ascent debris impacts, as well as those from micrometeoroid and orbital debris (MMOD) while in space. On the ISS, an array of accelerometers has been deployed both internal and external to the spacecraft, which is used to monitor vibrations to assess remaining structural life, as well as to detect any anomalous loading events. In one case this system detected the substantial vibrations that were imparted to the ISS due to an improper reboost thruster firing event. Data from this system was used to demonstrate that the ISS could continue to be safely habited in spite of excessive dynamic loads at some locations. An additional ultrasonic based measurement system is also being developed on ISS to detect MMOD impact events and any resulting pressure leaks that might occur. The potential for leaks on ISS due to MMOD impact damage is one of the highest identified risks to the ISS and its crew.



Dr. Prosser joined NASA Langley Research Center in 1987 as an Aerospace Technologist in the Nondestructive Evaluation Sciences Branch. In 2005, he joined the NASA Engineering and Safety Center as Discipline Expert for Nondestructive Evaluation and in 2007 was named a NASA Technical Fellow. He has served as technical lead and program manager for the research and application of NDE and Structural Health Management (SHM) systems for aerospace vehicles. Dr. Prosser’s research has been in the field of ultrasonic and acoustic emission sensing techniques. His work contributed to the successful development and implementation of a system to detect impacts on the Space Shuttle wing leading edge in response to the Shuttle Columbia accident. He has led NASA, industry, university and government agency teams to implement NDE and SHM systems for a variety of NASA programs including the Space Shuttle, International Space Station, X-33, and Aerospace Vehicle Systems Technology Program.
Dr. Prosser was the 1997 recipient of the NASA Floyd Thompson Fellowship, a 2003 recipient of a NASA Superior Accomplishment Award for efforts during the Columbia Accident Investigation, and a 2005 recipient of NASA’s Exceptional Achievement Medal. He is past Chair and a Fellow of the Acoustic Emission Working Group and is also the Scientific Editor of Structural Health Monitoring: An International Journal.
Dr. Prosser received his B.S. degree in Math and Physics from the College of William and Mary and his M.S. and Ph.D. degrees in Materials Science and Engineering from Johns Hopkins University.





General Keynote Address

Trend and research of contactless measurements for environmental testing of space systems


cozzaniMr. Alessandro Cozzani

Head of the Engineering Services Section
Test Centre Division
European Space Research and Technology Centre
Keplerlaan 1, 2201 AG Noordwijk (NL)

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Imaging systems have a variety of applications in environmental testing. They can be used for thermal mapping, for assessment of thermo-elastic deformations, for observation, or to verify for example the correct movement of a specimen. The ESA/ESTEC Test Centre has been developing in the past decade  modular and flexible visualization systems, which are the result of a long development plan aiming to offer to the customers of environmental testing a variety of advanced testing capabilities. The visualization system consists of two main set of subsystems, one for the visible and one for the infrared spectrum. The subsystem for the visible spectrum is used to observe and record deployments or in general movements of structures in thermal vacuum-thermal balance conditions, by means of a dedicated illumination system and high speed cameras, or to measure thermo-elastic deformations by means of a miniaturized, canister-free photogrammetry system. The subsystem for the infrared spectrum is meant to be used, instead, for thermal mapping. Research activities with very promising results are paving the way to extend the coverage to full point-clouds reconstruction combined with high speed 3D coordinates determination, applied to mechanical vibration testing, or to 3D thermography combined with IR wave-length ray-tracing This keynote provides a survey of the existing visualization systems at the ESTEC Test Centre, gives some details of results of the on-going research activities and describes several examples of application of already performed space system and subsystem testing.



Mr. Cozzani joined the European Space Agency in 1999 at the European Space Operations Centre (ESOC) In Darmstadt (Germany) after some years of work first as Young Graduate Trainee for ESA and later as on-site Contractor at ESOC as a member of the team to develop the new 35-m ESA Deep Space Antennas network. Between 1999 and 2002,  Mr. Cozzani worked as servo-mechanical engineer in the Ground Station Systems Division as has followed a number of R&D activities concerning the engineering, testing and operation of ground station antennas for the TT&C operations of spacecraft missions. Mr. Cozzani joined in 2002 the European Space Research and Technology Centre (ESTEC) in Noordwijk (The Netherlands) as electro-mechanical design engineer at the Test Centre Division. At ESTEC Mr. Cozzani was involved in a variety of tasks covering the design and qualification of in orbit experiments (the MEDET spectrometer wheel-mechanism on board of the EuTEF, Columbus module, ISS), the development of multi-physics virtual testing tools (the HYDRA hydraulic shaker virtual shaker simulator) and the development, qualification and operation of video test instrumentation for space systems testing (for Herschel-Planck and Gaia missions). In 2010 Mr. Cozzani was appointed as Head of the Engineering Services of the Test Centre Division, where he supported the testing of several ESA missions (BepiColombo, SOLO, SGEO, MTG, GAIA) and lead the research, development and operation of test instrumentation for the customers of the ESTEC Test Centre. Mr. Cozzani received his MSc degree in Aeronautical Engineering (with a major on Aerospace Systems) in 1992 at the Politecnico di Milano (Italy) with a thesis on Vibration Control Systems for Space Applications.