document title / titre du document TRP W ORK PLAN ... - emits - ESA

TRP Work Plan 2005-2007
Description of Activities
TEC-SB/7935/dc
12/Feb/09
TRP Reference:
T608-12QM
Study of the impact of the power meshed plane on electromagnetic behaviour of
Title:
electronic boards (PCBs).
To improve the adhesion between the successive layers, and thus the reliability of PCBs, a qualified manufacturer is willing to
replace full planes by meshed planes in PCBs. These modifications will impact the electromagnetic behaviour of electronic
equipment. The goal of the study is to evaluate, in large frequency band (up to 3 GHz), the impact of meshed plane on the
radiated emission, the signal integrity and the crosstalk. The study will consist on a bibliographic research on the topic, an
experimental study of comparative measurements between configuration with full plane and with meshed plane; and a
theoretical study in order to modelise the effect of meshed plane on electrical characteristics.
Deliverables:
Reports and documentation.
Current TRL: TRL1 Target TRL: TRL1-2 Application Need/Date: TRL5 by 2010
Application/Mission: All projects Contract Duration: 15 months
SW Clause : - Dossier0 Ref.: T-7894
Consistency with Harmonisation
Roadmap and Conclusions:
N/A
TRP Reference:
Title:
T608-15QM
Test and validation of contamination models through ground experiments modeling
Contamination can have a major detrimental impact on space systems. Its assessment is performed through physical models
of contaminant emission, transport and effects. At system level contamination can only be assessed through numerical
modeling, due to the complexity of a whole spacecraft. Unfortunately, the models and numerical tools under use have not yet
been physically validated. A first reason is the difficulty and cost of flight experiments. A second reason was the inability of the
old contamination software (ESABASE/OUTGASSING) to model ground experiments. This second problem has now been
solved by the new software COMOVA, developed in a QMC-EMA mini project which was completed in 2000 (this new code
also incorporates improved deposition models). It is thus now both possible and necessary to validate this new code and its
physical models through ground tests. The proposed action consists in:- gathering ground data involving outgassing,
deposition, re-emission. They can be existing VBQC data (with reemission) or a new dedicated experiment involving more
complex transport paths.- modelling these ground experiments with COMOVA and comparing data and simulation- improving
the modelling, either simply by improving the extraction of the deposition and re-emission parameters from basic experiments,
or if necessary by improved the physical models implemented in COMOVA.
Deliverables:
Proposal for ground testing of a complex structure in a large facility; model of the structure outgassing and contamination
characteristics; test and critical comparison of model and experiment (and adaptation of model if needed).
Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: TRL5 by 2010
modelling contaminants for optical
Application/Mission: Contract Duration: 12 months
satellite, such as GAIA, JWST, AEOLUS
SW Clause : - Dossier0 Ref.: T-855
Consistency with Harmonisation
Not directly linked to harmonised technology.
Roadmap and Conclusions:
Page 225 of 227