ParisTech

About: ParisTech is a education organization based out in Paris, France. It is known for research contribution in the topics: Residual stress & Finite element method. The organization has 1888 authors who have published 1965 publications receiving 55532 citations. The organization is also known as: Paris Institute of Technology & ParisTech Développement.

Application of EBIOS for the risk assessment of ICT use in electrical distribution sub-stations

Abstract: This paper addresses the challenge of applying an Information System risk assessment technique in the context of an Industrial Control System, specifically the electrical distribution network This paper describes the application of the technique EBIOS (Expression des Besoins et Identification des Objectifs de Securite) to evaluate the risk associated with use of supporting Information and Communication Technologies (ICT) within distribution substations operation The paper highlights the detailed and rigorous nature of the approach in addition to identifying some limitations of the approach notably the difficulties of representing both the interdependency between the electrical distribution network and its supporting ICT and the evolving risk profile of dynamic system Consequently, the paper will also highlight ongoing work aimed at addressing these limitations

A 3D study of the influence of friction on the Adiabatic Shear Band formation during High Speed Machining

Abstract: Adiabatic Shear Band (ASB) may form at very high speeds with materials having poor thermal conductivity. It results from the competition between plastic hardening and strain softening and initiates when the latter becomes predominant. Because of high speeds, the heat created does not have sufficient time to propagate, leading to the formation of high strain localized zones. Starting from a previous description of the ASB formation process where the friction phenomenon has been considered as negligible, the aim of this paper is to describe the influence of the latter on the ASB formation process. Consequently, using a very general 3D finite element code where mesh adaptation is triggered by an error estimator within an Arbitrary Lagrangian Eulerian formulation, the formation of several ASB has been simulated in 3D High Speed Machining taking friction into account. The results obtained allow proposing a description of its influence on both the ASB build up process and the final chip geometry.

Real time implementation of space vector pulse width modulation using Arduino DUE board

Abstract: In this paper, a real-time digital implementation of a two level space vector pule width modulation (SVPWM) algorithm is carried out using ARDUINO DUE development board. The main contribution in this work is that the implementation was performed by using directly the internal PWM module of the ARM cortex M3 processor of the ARDUINO DUE. By mean of this, the computation time and the resources utilization of the processor are greatly reduced. The other contribution is that this implementation may reduce power losses and harmonics by minimizing the number of switching and generating symmetrical signals. To validate the implemented algorithm, an experimental validation of the SVPWM for two level inverters is carried out by using a SEMIKRON multi-function converter. The results obtained from the experimentation are closer to that of simulation, which confirms the validity of the implemented algorithm.