Tutorials
| Ferdinando Tonicello, ESA |
Failure propagation in electrical and electronic space systems The tutorial on failure propagation in electrical and electronic space systems is intended as an introduction to the subject of failure propagation containment and avoidance for space electrical and electronic items. It is directed both to system and subsystem electrical architects and to electronic/ electrical equipment designers. The tutorial has mainly a didactical purpose, for enlarging target groups awareness on the problems of failure propagation and prevention, and to propose pragmatic yet effective solutions. The covered subjects are the following:
In any case, specific examples at circuit level are provided to illustrate the concepts. |
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| Short Biography Ferdinando Tonicello, Italian, resident in the Netherlands since 1997. Presently (since 2015) Power Management And Distribution Lead Engineer in ESTEC, Noordwijk, The Netherlands. He is author/co-author of a number of papers and patents on power system, power supply and conditioning for space applications. In the course of his professional life, he has working on a number of ESA satellites (Rosetta, Integral, MEX, VEX, Goce, Gaia, Bepi Colombo, Juice and others) and directly or indirectly been responsible of technical management of a number of R&D activities. He prepared/presented a number of tutorials on the electrical and electronic domain for space applications. |
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| David Delafuente, NASA-JSC |
Lithium ion Batteries Cell-to-Cell Propagation Risk for Crewed Space Flight Li-ion batteries pose a significant fire risk should a single cell go into thermal runaway due to an internal short propagating to the rest of the battery. While this type of event is not a common occurrence, the consequence of a cell-to-cell propagating fire can be catastrophic to both the crew and the vehicle especially for larger batteries. NASA has invested resources into the understanding and mitigating the cell-to-cell propagation risk for human space flight with a focus on using commercial small cells for battery developments. Cell-to-cell propagation test requirements with pass/fail criteria have been established and are applicable to current crewed space missions. The relevant design parameters for a battery to be passively propagation resistant and how to verify through test, the battery meets the requirements will be reviewed. |
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| Short Biography David Delafuente, Ph.D. is the Battery Safety Technical Discipline Lead at NASA Johnson Space Center in Houston, Texas. He is responsible to evaluate the safety of flight batteries for ISS and other crew missions for NASA. David is also focused on developmental efforts to improve the safety of batteries while increasing the energy storage capabilities for crewed space flight. He has over 10 years of battery experience with applications from underwater to space and everything in between. David is one of the pioneers in the field of non-propagating lithium-ion batteries and successfully matured a large format, non-propagating battery design for operational use in a manned submersible vehicle. He continues to improve and implement unique battery designs while increasing the safety and capability of battery operations for space applications. David holds a B.S. in Chemistry from Berry College and a Ph.D. in Chemistry from the University of Virginia. |
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| Carsten Baur, ESA |
Modelling of solar cell degradation in space due to particle irradiation Modelling of solar cell degradation due to particle irradiation forms an important part of the power analysis for space missions. Two methods are nowadays applied to carry out this kind of analysis – the so-called “equivalent fluence method” that was first described by scientist from JPL (Jet Propulsion Laboratory) and the “displacement damage dose” method that was introduced by NRL (Naval Research Laboratory). Both methods will be described in detail. Pros and cons of each method will be discussed and the way to get consistent results when applying one or the other method will be provided. An important part of the tutorial will be dedicated to practical examples. Questions like: “How do I analyse a given data set?” and “How do I get a remaining factor for a given mission by using SPENVIS?” will be addressed. |
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| Short Biography Carsten Baur studied Physics in Freiburg, Germany, where he joined the Fraunhofer Institute for Solar Energy Systems in 2000 for doing his diploma thesis and his PhD on the development and characterisation of III-V space solar cells”. Since 2006 Carsten is with ESA as a solar cell engineer where he has responsibility in the definition and supervision of R&D activities and in project support for missions like JUICE or ELECTRA. In the field of modelling of solar cell degradation due to particle irradiation, Carsten is active since almost 20 years within which he also published a number of scientific papers on the topic. |
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| Sven Landstroem, ESA |
Design of EMC filters for DC/DC converters and Stability of cascaded power system One of the most recurrent problems found in electrical designs for ESA spacecraft are resonance circuits that are not properly damped. The underestimated efforts for the topic, manifest itself into many different problems of which a few to mentioned are:
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