In order to assess the reliability of a complex industrial system by simulation, and in reasonable time, variance reduction methods such as importance sampling can be used. We propose an adaptation of this method for a class of multi-component dynamical systems which are modeled by piecewise deterministic Markovian processes (PDMP). We show how to adapt the importance sampling method to PDMP, by introducing a reference measure on the trajectory space. This reference measure makes it possible to identify the admissible importance processes. Then we derive the characteristics of an optimal importance process, and present a convenient and explicit way to build an importance process based on theses characteristics. A simulation study compares our importance sampling method to the crude Monte-Carlo method on a three-component systems. The variance reduction obtained in the simulation study is quite spectacular.
Accepté le :
DOI : 10.1051/ps/2019015
Mots-clés : Monte-Carlo acceleration, importance sampling, hybrid dynamic system, piecewise deterministic Markovian process, cross-entropy, reliability
@article{PS_2019__23__893_0, author = {Chraibi, H. and Dutfoy, A. and Galtier, T. and Garnier, J.}, title = {On the optimal importance process for piecewise deterministic {Markov} process}, journal = {ESAIM: Probability and Statistics}, pages = {893--921}, publisher = {EDP-Sciences}, volume = {23}, year = {2019}, doi = {10.1051/ps/2019015}, mrnumber = {4045542}, zbl = {1506.60102}, language = {en}, url = {http://www.numdam.org/articles/10.1051/ps/2019015/} }
TY - JOUR AU - Chraibi, H. AU - Dutfoy, A. AU - Galtier, T. AU - Garnier, J. TI - On the optimal importance process for piecewise deterministic Markov process JO - ESAIM: Probability and Statistics PY - 2019 SP - 893 EP - 921 VL - 23 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ps/2019015/ DO - 10.1051/ps/2019015 LA - en ID - PS_2019__23__893_0 ER -
%0 Journal Article %A Chraibi, H. %A Dutfoy, A. %A Galtier, T. %A Garnier, J. %T On the optimal importance process for piecewise deterministic Markov process %J ESAIM: Probability and Statistics %D 2019 %P 893-921 %V 23 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ps/2019015/ %R 10.1051/ps/2019015 %G en %F PS_2019__23__893_0
Chraibi, H.; Dutfoy, A.; Galtier, T.; Garnier, J. On the optimal importance process for piecewise deterministic Markov process. ESAIM: Probability and Statistics, Tome 23 (2019), pp. 893-921. doi : 10.1051/ps/2019015. http://www.numdam.org/articles/10.1051/ps/2019015/
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