What is Siconos ?

SICONOS is the European Project  IST2001-37172, funded by the Commission of the European Communities, from September 1, 2002, to August 31, 2006. It is a project of the Information Society Technologies programme, fifth framework programme (FP5). This project's goal is the study of complementarity dynamical systems (a class of hybrid dynamical systems). It gathers scientists from various communities like Mechanics, Applied Mathematics, Systems and Control, and Numerical Analysis.


Project Summary


The name Siconos comes from the title of the project: Modelling, Simulation and Control of Nonsmooth Dynamical Systems.

The purpose of this grant is to develop algorithms and software for the simulation and feedbackcontrol of dynamical systems which are nonsmooth, and more specifically so-called complementarity dynamical systems. Nonsmoothness is usually introduced into the system either by some nonsmooth control action or by the presence of nonsmooth events at a macroscopic level (such as impacts or switchings). Nonsmooth models abound in many engineering systems such as sliding mode or hybrid control and rigid body mechanics such as rattle of automotive components and other mechanical freeplay, and switching circuits in power electronics. We choose complementarity systems as the mathematical framework for studying nonsmooth nonlinear systems. This framework is large in terms of the range of potential applications, yet specific enough to allow for deep investigation.

The research will tackle head on two fundamental issues. Firstly that smooth numerical methods fail on nonsmooth systems. Algorithms need to be developed that deal with hit crossings, impacts, complementarity problems, sliding and chatter in a robust and easily applicable way. Second, the qualitative understanding of the dynamics including the design of feedback
and robust control algorithms requires specific methods and cannot be solved with simple adaptations of known techniques for smooth linear or nonlinear dynamical systems.

The research teams comprise many of the world experts in the theory and applications of these disparate theories. Therefore, this grant represents a unique opportunity to synthesise current knowledge in order to achieve the much needed goal of a general software for nonsmooth dynamics.


Project Objectives