Modern electrical locomotives are powered by controlled power converters. Integration testing of the vehicle control system is performed using real-time simulation. The present contribution presents an evaluation of a digital real-time simulator for this purpose, with particular emphasis on switching and events, which is one of the more demanding tasks in the real-time simulation of hybrid syst...

The development and implementation of a novel structural testing method involving the combined use of shake tables, actuators, and computational engines for the seismic simulation of structures is presented herein. The hybrid simulation is intended to discover through physical testing the behavior of parts or whole substructure assemblies for which knowledge is limited, while the known parts of...

This Study describes a six degree -of-freedom hybrid simulation for the optimum design of a space vehicle re entry flight control system, utilizing the E A I HYDAC ® 2400 Combined Hybrid Computing System. The specific purpose of the simulation is the evaluation of a temperature-rate flight control system (TRFCS) which utilizes temperature sensors to provide shortperiod stabilization and long te...

Air traffic system is analyzed from the aspects of system's attributes internal operating mechanisms and external behaviors. A hybrid air traffic simulation model described by the combination of discrete event and continuoustime models is proposed. The simulation model uses Agent-based techniques to describe micro behaviors of the air traffic individuals and integrates micro behaviors into dyna...

MATLAB/Simulink is a popular software environment used by engineers and scientists. It offers integrated modeling and simulation tools and numerous toolboxes employable in conjunction with modeling and simulation tasks. However, modeling and simulation of discrete event systems is often confusing and sometimes not compliant with the established system theory. This contribution presents a MATLAB...

in this work, we had examined 7 different types of neutron sources -an isotropic point source, sending 14.1(mev) monoenergetic neutrons ,an spherical source with 30 micron radius sending 14.1 (mev) monoenergetic neutrons, and a 30 micron radius spherical source having gaussian fusion energy spectrum from a d-t fusion, with different bandwidths -1,10,50,100 and 1000 kev and investigated 5 differ...

In this paper we propose a technique to extend the simulation of a Zeno hybrid system beyond its Zeno time point. A Zeno hybrid system model is a hybrid system with an execution that takes an infinite number of discrete transitions during a finite time interval. We argue that the presence of Zeno behavior indicates that the hybrid system model is incomplete by considering some classical Zeno mo...

A hybrid simulation approach is developed to study chemical reactions coupled with long-range mechanical phenomena in materials. The finite-element method for continuum mechanics is coupled with the molecular dynamics method for an atomic system that embeds a cluster of atoms described quantum-mechanically with the electronic density-functional method based on real-space multigrids. The hybrid ...

In this paper we present a class of hybrid systems made of deterministic differential equations and random discrete jumps. We then show how to construct a simulation of such a stochastic hybrid system that provides perfect samples of its asymptotic behavior based on the extension to continuous state-space of coupling-from-the-past techniques introduced by Foss and Tweedie (1998) and using suita...

Whether a real system is approximated in a discrete or continuous simulation model depends on the more predominating type of variables determining the system’s behavior over time. If both discretely and continuously changing variables have to be considered, hybrid simulation techniques have to be applied, where discrete events have an influence on the otherwise continuously changing system stat...