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The phenomenon of an internal fault arc in a closed container has been investigated in a magnetohydrodynamic method, which simulates the arcing process ignited between two rod electrodes in air with ac current, including the distributions of temperature and pressure. Particularly, the pressure rises due to the fault arc at different locations within the container are calculated. More significant is...
Based on basic electrochemical principles, an equivalent circuit model of a Li-ion battery is developed. The eventual aim of the work is to use such a model in the accurate control of power flow for a battery energy storage system (BESS) in grid-scale applications. The model developed here allows one to monitor the BESS internal states, by taking into consideration the internal dynamics of the battery...
Requirements engineering (RE) is crucial for software projects. However, formal requirements engineering is often ignored in scientific software projects. To enhance the quality of scientific software and to adopt more good software engineering practices, we claim that requirements need to be elicited and specified. We present DRUMS Board, which supports lightweight requirements elicitation. DRUMS...
Variable-fidelity optimization (VFO), which utilizes the precise value of high-fidelity (HF) model and underlying trend of low-fidelity (LF) model, has solved many computationally expensive problems by simulation-based design. Though it has been developed rapidly in recent years, the simpler and cheaper ones are still needed. In this paper, a new optimization framework based on Kriging method with...
Agent-based modeling is a paradigm that simulates the simultaneous operations and interactions of multiple agents, in an attempt to re-create and predict the appearance of complex phenomena. Its key advantages are that a) it provides the most natural way to model real-world systems and b) it has much more modeling power than traditional mathematical methods such as differential equations as the latter...
This paper establishes a hardware-in-the-loop realtime simulation system of long stator linear synchronous motor (LSM) drive with neutral point clamp (NPC) 3-level AC-DC-AC converter for high speed maglev train. The dynamic model of the LSM supplied by two parallel converters is described in detail. Hardware configuration, simulation algorithms and system model based on dSPACE real-time simulation...
Requirements engineering is a core activity in software engineering. However, formal requirements engineering methodologies and documented requirements are often missing in scientific computing projects. We claim that there is a need for methodologies, which capture requirements for scientific computing projects, because traditional requirements engineering methodologies are difficult to apply in...
A novel real time simulation (RTS) system for high power rail traction is developed. It includes simulation models of high power back-to-back converter and a synchronous motor (SM). The system runs on a dSPACE based platform connected to real converter and motor controllers by actual hardware interface. An algorithm of decoupling discrete event of converters and continuous time systems of SM is proposed...
This paper analyzes the long-stator linear synchronous motor (LLSM) which is powered by two parallel converters. When LLSM is applied in high speed rail traffic, the long distance feeder cable has to be considered. Real time simulation is introduced to test the controller of the LLSM by using dSPACE real-time simulation platform. A real dynamic mathematical model utilizing MATLAB/SEVIULINK is built...
Through analyzing non-linear, time-varying characteristics of the economic system and summing up the basic idea of nonlinear economic model, BP neural network is used to do non-linear economic modeling methodology and specific implementation steps, by which new ideas is put forward for the existence of model, and implementation of the circumstances in Matlab is given.
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