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Duration: 9 months (starting date: August 2005)
Status: Concluded
Project Contact:
Rita Ribeiro

Scientific Advisors:
Rita Ribeiro, Ricardo Marques Pereira (University of Trento), Javad Jassbi (Azad University, Science and Research Campus).

Download: Project Handout, Executive Summary

ESA - Triangle Initiative project | NOMDIS - New Operators for Monitoring and Diagnostic Intelligent Systems - Past Research Projects
Project Summary
Monitoring and diagnostic tools are essential for mission control purposes, as well as for assessing and monitoring the health status of spacecraft and satellite components.

Even though there are proposals for fuzzy monitoring and diagnostic expert systems (e.g. ESOC/ ESA project ("Fuzzy Logic for Mission Control Purposes" - AO/1-3874/01/D/HK for the ENVISAT satellite) the important issue of how to perform rule aggregation and inferencing with synergetic operators (i.e. those aggregation operators that take into account the dependencies/synergies between overlapping rules/parameters) has never been addressed. The main reason for this is the lack of communication between the fields of mathematical multicriteria decision making, artificial intelligence, and space engineering.

Recent developments in the theory of weighted aggregation operators and fuzzy multicriteria decision making have established Choquet integration as an interesting and powerful generalization of both the standard weighted averaging (WA operators) and the ordered weighted averaging (OWA operators). The essential novel feature of Choquet integrals is their capability of modelling and encoding the interaction patterns which correlate the various criteria, making use of techniques borrowed from discrete mathematics, cooperative game theory and weighted aggregation theory.

Our main goal in this project is to translate the Choquet integral methodology from interacting fuzzy multicriteria decision systems to interacting rule-based expert systems for monitoring and diagnostic space problems. In this way we expect to extend significantly the effectiveness and applicability of interactive intelligent systems for monitoring and diagnostic, just as Choquet integration has largely extended the validity and scope of weighted aggregation in fuzzy multicriteria decision making.

Research Areas
  • Fuzzy logic and Fuzzy Rule Based Systems
  • Intersection, union and implication operators
  • Aggregation operators
  • Choquet integrals as synergetic aggregation operators


Apoio FCT – Fundação para a Ciência e a Tecnologia no âmbito da Unidade de Investigação CTS - Centro de Tecnologia e Sistemas, referência UID/EEA/00066/2013