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:
Title:
T603-13ES
Modern Control Techniques Applied to Satellite FDIR
Although the currently implemented algorithms are responding rather adequately to large class of the mission requirements,
advanced new FDIR techniques recently introduced through modern control theory need to be further explored. From a cost
perspective it is not manageable to have everywhere fault redundant hardware and complex and costly ground operation
intervention. Therefore it is more efficient to study the analytic model based on-line fault monitoring techniques that use
measured data fed into a detection filter responding with a threshold signal in the face system anomalies.
The design of such FDI filters can be done using estimation and filtering techniques such as Kalman filters. In many cases
residual generation becomes problematic in off-nominal conditions leading to a high occurrence of false alarms which can lead
to unnecessary complex operational interventions.
Therefore robust filtering techniques originating from the as H-infinity, mu-, LMI as well as LPV theories provide a well founded
framework for the development of future FDIR systems to better respond to unforeseen situations. The development of FDI
filters using these methods need to be investigated with the overall objective of enhancing the detection and isolation strategy
in terms of robustness.
Another important field that needs to be investigated is the interaction and cascading of multiple failure modes and models.
The proposed activity shall further include the implementation of selected algorithms. The evaluation of the associated
performances and robustness shall also be combined with trade-off analysis conducted within common and unambiguous
testing scenario. Relevant test cases worth to be investigated are Lisa Pathfinder, Lisa and Gaia, agile and accuracy pointing
satellites, Darwin formation flying facing thruster failures. Under that context, the definition of standardised benchmark
developed typically under Matlab and Stateflow environment is also expected.
Deliverables:
Documentation and software.
Current TRL: TRL1 Target TRL: TRL3 Application Need/Date: TRL5 by 2009
Application/Mission: EO and Science Contract Duration: 18 months
SW Clause : Open Source Code Dossier0 Ref.: T-7821
Consistency with Harmonisation
Roadmap and Conclusions:
TRP Reference: T603-30EC
Title:
Sensor on a Chip Feasibility study and Avionics Evolution
The technological feasibility of producing an entire sensor on a chip (i.e. optics, detector, processing and digital interface) shall
be investigated using digital sun sensor, star tracker and navigation or descent and landing cameras as examples. The
feasibility investigation shall cover the integration of imaging, processing and data interface functions on the same silicon chip,
the production and performance of useable optics with MEMS technology (e.g. wafer stacking and bonding for 3-D integration
of MEMS optical systems with the electrical functions) and the integration of such an assembly with power conditioning
electronics within a hybrid. Key technologies will be demonstrated by production and test of a dedicated prototype (e.g. of an
optical system).
The system aspects surrounding the use in space of a sensor on a chip concept shall be investigated at both sensor unit and
system level. These investigations shall cover the packaging of the 'sensor on chip', the thermal implications of such a
concept for externally mounted sensors, power supply options, mounting and alignment problems and data interface methods
and techniques.
With the results of the technology investigations, unit level studies and system impact studies, a development plan shall be
written for AOCS sensors on a chip covering sun sensor, star tracker and navigation camera and descent and landing camera
applications, giving realistic target requirements and highlighting all critical areas of outstanding technology devlopment.
Deliverables:
Demonstration model.
Current TRL: TRL1 Target TRL: TRL4 Application Need/Date: TRL5 by 2012
Application/Mission: All missions Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-7799
Consistency with Harmonisation
Roadmap and Conclusions:
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