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20th World Congress of the International-Federation-of-Automatic-Control (IFAC)

作者： Levant, Arie Livne, Miki Yu, Xinghuo Tel Aviv Univ Sch Math Sci Tel Aviv Israel Israel Aerosp Ind Lod Israel RMIT Univ Sch Engn Melbourne Vic 3001 Australia

Sliding-mode (SM) based differentiation is exact on a large class of functions and robust to the presence of input noises. The best-possible differentiator accuracy is for the first-time calculated. A few differentiators and their discretizations are presented. As an important application of the differentiation technique we propose the first robust exact method for the estimation of the equivalent control and of a number of its derivatives from a SM control input. (C) 2017, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Sliding mode control nonlinear observers and filter design robustness analysis discrete event modeling and simulation

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Distributed Statistical Analysis of Complex Systems Modeled Through a Chemical Metaphor

Distributed Statistical Analysis of Complex Systems Modeled ...

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International Conference on High Performance Computing & simulation (HPCS)

作者： Pianini, Danilo Sebastio, Stefano Vandin, Andrea Univ Bologna ALMA MATER STUDIORUM I-40126 Bologna Italy IMT Inst Adv Studies Lucca Lucca Italy Univ Southampton Elect & Comp Sci Southampton SO9 5NH Hants England

ISBN: (纸本)9781479953134

The chemical-inspired programming approach is an emerging paradigm for defining the behavior of densely distributed and context-aware devices (e.g., in ecosystems of displays tailored to crowd steering, or to obtain profile-based coordinated visualization). Typically, the evolution of such systems cannot be easily predicted, thus making of paramount importance the availability of techniques and tools supporting prior-to-deployment analysis. Exact analysis techniques do not scale well when the complexity of systems grows: as a consequence, approximated techniques based on simulation assumed a relevant role. This work presents a new simulation-based distributed analysis tool addressing the statistical analysis of such a kind of systems. The tool has been obtained by chaining two existing tools: MULTIVESTA and ALCHEMIST. The former is a recently proposed lightweight tool which allows to enrich existing discrete event simulators with automated and distributed statistical analysis capabilities, while the latter is an efficient simulator for chemical-inspired computational systems. The tool is validated against a crowd steering scenario, and insights on the performance are provided by discussing how the analysis tasks scale on a multi-core architecture.

关键词： discrete event modeling and simulation Analysis of Emergent Behaviors Automated Distributed Statistical Analysis Statistical Model Checking Chemical-Inspired Computation

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Laxity Release Optimization for Simulink Models

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IFAC Proceedings Volumes 2014年第3期47卷 9605-9610页

作者： Kaijie Qin Guiming Luo Xibin Zhao School of Software Tsinghua University Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

In Simulink models with single-processor multitask implementation, time delays and transaction buffers emerge when Rate Transition (RT) blocks are added. This paper examines Simulink modeling and buffer optimization. The concept of laxity release is defined for the priority assignment procedure. The algorithms of laxity prediction and laxity release are proposed for the task scheduling problem. The laxity bounds and laxity release bounds are obtained, and the response time based on laxity release is calculated. Some experimental results are given to show that with our approach, total system buffer costs are reduced and system performance is improved.

关键词： discrete event modeling and simulation Task scheduling of hybrid systems Model predictive control of hybrid systems

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Bias Reduction in Estimating Quantile Sensitivities

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IFAC Proceedings Volumes 2014年第3期47卷 10463-10468页

作者： Guangxin Jiang Michael C. Fu Chenglong Xu Department of Mathematics Tongji University Shanghai 200092 China Robert H. Smith School of Business and Institute for Systems Research University of Maryland College Park MD 20742 USA

In this paper, we introduce an Infinitesimal Perturbation Analysis (IPA) estimator with jackknifing to estimate quantile sensitivities, and theoretically prove the two-fold jackknife method reduces bias by eliminating the order 1/ n bias in the original IPA estimator. Numerical examples in finance on portfolio return and options pricing are presented to illustrate the superiority of the new estimator over the original IPA estimator, especially for high and low quantile levels. Antithetic variates are used to further reduce the variance.

关键词： discrete event modeling and simulation Stochastic hybrid systems Monte Carlo simulation Sensitivity analysis Perturbation analysis

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A Package System for Maintaining Large Model Distributions in VLE Software

A Package System for Maintaining Large Model Distributions i...

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21st IEEE International Workshop on Enabling Technologies - Infrastructure for Collaborative Enterprises (WETICE)

作者： Quesnel, Gauthier Trepos, Ronan INRA UR875 Biometrie & Intelligence Artificielle F-31326 Castanet Tolosan France

ISBN: (纸本)9780769547176

The modeling and simulation (M&S) is becoming a central activity in order to build, study and analyze new systems. To improve activities of M&S, we need to develop collaborative technologies. In this context, we develop the application software Virtual Laboratory Environment (VLE) to model, simulate and analyze dynamic systems. VLE is based on the discrete event System specification (DEVS) formalism, a widely recognized specification for modeling and simulating discrete events systems. The main features of the DEVS formalism are a modular and hierarchical approach of the M&S and a relative simplicity to develop the simulation algorithms. Researchers and engineers from different comunities used VLE to develop and study models. However, the modelers need to share source code in order to reuse, couple and combine models. It is not sufficient because they are not helped for maintenance and version upgrades issues. In this paper we present a package system manager that greatly helps modelers to publish source code, binary code, exchange models, data and software application in VLE.

关键词： Packages Package System Manager Distribution discrete event modeling and simulation

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Low intensity conflicts modeling framework based on dynamic hierarchical structure DEVS approach 07

Low intensity conflicts modeling framework based on dynamic ...

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Proceedings of the 2007 Summer Computer simulation Conference

作者： Lassaad Baati Claudia Frydman Norbert GIAMBIASI Mamadou Seck Université Paul Cézanne -- Aix Marseille Marseille France

ISBN: (纸本)9781565553163

Low intensity conflicts (LIC) become crucial in military operations. They are situations where contending groups are involved in a confrontation below the level of conventional war. To protect minorities and maintain or restore an acceptable level of peace a military force can be employed. Such a system is principally characterised by the importance of the interactions between and within factions. Salient properties of these interactions are their asymmetry, their effects at different scales and their dynamic nature. The multi-agent paradigm and the dynamic structure system are particularly suitable ways to represent a system with such characteristics. This paper proposes a discrete events Specification (DEVS) of autonomous agents and uses a related dynamic hierarchical structure approach to enable more realistic training of military personnel and scenario analysis.

关键词： low intensity conflicts hierarchical structure variable/dynamic structure DEVS discrete event modeling and simulation

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From abstract representation to formal modeling of tactical military operations 07

From abstract representation to formal modeling of tactical ...

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Proceedings of the 2007 Summer Computer simulation Conference

作者： Jean Caussanel Norbert Giambiasi Agostino G Bruzzone Université d'Aix-Marseille III Paul Cézanne Marseille cedex France University of Genoa Italy Genova Italy

ISBN: (纸本)9781565553163

Situations where armed forces are now engaged have become more and more varied and complex far away from conventional confrontations. Hence, headquarters have an increasing need of a large variety of scenarios, quickly designed and implemented, in order to anticipate such new kind of situations. This is one of Piovra objectives to provide such kind of model of scenario. Recently, several efforts have arisen seeking similar goal but we choose to keep an high level model usable by end-users. This paper is to present how manage and connect these two levels of modelling: conceptual level for end-user and an operational level in order to perform simulations without platform constraints.

关键词： discrete event modeling and simulation computer generated forces scenarios mission representation

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LSIS_DME M&S environment extended by dynamic hierarchical structure DEVS modeling approach 07

LSIS_DME M&S environment extended by dynamic hierarchical st...

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Proceedings of the 2007 spring simulation multiconference - Volume 2

作者： Lassaad Baati Claudia Frydman Norbert Giambiasi Université Paul Cézanne -- Aix Marseille Marseille France

ISBN: (纸本)9781565553132

modeling and simulation becomes crucial in analyzing dynamic system behavior. Many formalisms and methods are introduced in order to improve this process. The effort is twofold; a) reach more realistic models and results, b) obtain "simplified, flexible" models. Efforts are conducted to adapt formalisms to several domains and features. In our work, we are interested in the structure variability especially in DEVS modeling formalism. Structure variability allows models to be adapted to different situations along simulation. We proposed a dynamic hierarchical structure modeling approach and the corresponding algorithm based on the abstract simulator. This paper presents an implementation in an M&S environment.

关键词： hierarchical structure discrete event modeling and simulation variable/dynamic structure DEVS computer generated forces

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CD++: a toolkit to develop DEVS models

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SOFTWARE-PRACTICE & EXPERIENCE 2002年第13期32卷 1261-1306页

作者： Wainer, G Carleton Univ Dept Syst & Comp Engn Ottawa ON K1S 5B6 Canada

The features of a toolkit for modeling and simulation based on the DEVS formalism are presented. The tool is built as a set of independent software pieces running on different platforms. Not only are the main characteristics of the environment presented, a focus on its use is also considered by inclusion of application examples for a variety of problems. Many models can be defined in an automated fashion, simplifying the construction of new models and easing their verification. The use of this formal approach has allowed the development of safe and cost-effective simulations, significantly reducing development time. Copyright(C) 2002 John Wiley Sons, Ltd.

关键词： discrete event modeling and simulation modeling methodologies DEVS formalism Cell-DEVS modeling and simulation tools

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Generalized discrete event simulation of bond graph

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simulation 2001年第1-2期77卷 4-22页

作者： Naamane, A Giambiasi, N Damiba, A Inst Univ Sci Ing Enieur Marseille DIAM F-13397 Marseille 20 France

We propose a new approach dealing with the combination of bond-graph with GDEVS formalism for modeling and simulation of complex systems using discrete event techniques. We show how to build discrete event simulation models for bond graph elements, with either piecewise linear input-output trajectories or any kind of polynomial trajectories. One of the main advantages of our method is the reduction in the number of simulation Steps, and therefore the possibility of studying dynamic hybrid systems using only the discrete event paradigin.

关键词： bond graph computational causality discrete event modeling and simulation polynomial approximation

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