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The end of Dennard scaling has led to an increase in demand for energy-efficient custom hardware accelerators, but current hardware design is slow and laborious, partly because each iteration of the compile-run-debug cycle can take hours or even days with existing simulation and emulation platforms. Cyclist is a new emulation platform designed specifically to shorten the total compile-run-debug cycle...
The modeling, simulation and analysis of the energy conversion equations describing the behavior of a hybrid system PV and wind turbine, hybrid system for electrical power generation. A numerical model based on the aforementioned equations was developed, coded and results were compared to experimental data. The model is intended to be used as an optimization and design tool for such hybrid systems...
Cyber-Physical Systems (CPS) are composed of computing devices interacting with physical systems. Model-based design is a powerful methodology in CPS design in the implementation of control systems. For instance, Model Predictive Control (MPC) is typically implemented in CPS applications, e.g., in path tracking of autonomous vehicles. MPC deploys a model to estimate the behavior of the physical system...
The voltage equation of asynchronous motor was established in synchronous rotating coordinate system. This model was implemented by using the Matrix Concatenation module in Simulink software. Simulation experiments were carried out. The results showed that this modeling method was simple, fast operation and high accuracy.
The difficulty of modeling a resonant converter is the fact that, unlike a pulse-width-modulation (PWM) converter, an average concept doesn't work. The only successful equivalent circuit model, proposed by E. Yang, is based on fundamental approximation and harmonic balance theory. However, it is conceptually hard to understand because of an unidentified “equilibrium state.” A resonant converter was...
The vision is considered the most important sense in humans, the visual field may be affected by various diseases or conditions that can even be congenital, resulting in a high percentage of people with visual problems, low vision to blindness. In the majority of cases can be corrected with conventional methods, however, if a suitable control could be prevented and up to early detection of various...
Considering the shortages of current modeling methods of gas turbine engine simulation systems, this paper analyzes in detail the process of modeling using object-oriented approach. The class structure suitable to the simulation system was designed. Properties and methods for each component class are increased, the basic class library of the simulation system is completed, and a set of model components...
Sophisticated cyber attacks by state-sponsored and criminal actors continue to plague government and industrial infrastructure. Intuitively, partitioning cyber systems into survivable, intrusion tolerant compartments is a good idea. This prevents witting and unwitting insiders from moving laterally and reaching back to their command and control (C2) servers. However, there is a lack of artifacts that...
Cyber attacks are a critical threat to government infrastructure, commercial enterprises and personal devices. When belligerents attack cyber systems, they need to spread laterally to reach high value targets and communicate with their command and control sites. Intuitively, a layered defense including intrusion detection systems will limit the adversary's exploitation of the target. We apply lessons...
In this work, some smart appliances (i.e., smart refrigerator and smart washing machine) and the corresponding smart home model are introduced to show the importance of smartness to improve user comfort and energy efficiency in homes. Detailed Petri net models of the considered appliances are also given in order to enable a good general view of their operation and integration with the smart home....
SimVascular is an open source software platform for cardiovascular simulation, providing a complete pipeline from medical image data to volumetric model construction, meshing, and blood flow simulation. Previous workshops and educational programs have utilized SimVascular, but learning assessments have not been used to rigorously quantify gains in conceptual understanding. Goal: The purpose of this...
The extensive involvement of energy conversion and storage technologies is becoming increasingly important in the context of energy transition. A sufficient modeling and simulation of large-scale and coherent cross-energy systems is essential to enable decision makers to put the right course. This process implies growing complexity in terms of physical and market economy modeling on the device-level,...
In this paper there is detailed the asynchronous operation caused by an important overload, of a synchronous motor. There are mentioned the currents of all the windings, main flux, electromagnetic torque, electrical angular speeds of the rotating field and of the rotor which define the amplitudes of the electrical, magnetic and mechanical stresses. The effect of the damping windings resistance in...
The article presents a use case evaluation of the robustness of a physical protection system for the Vodňany water tank, designated as a national critical infrastructure element. The evaluation will be performed based on three probable attack scenarios; the aim of these would be poisoning the drinking water source and intoxication of the population of the nearby city or destruction of the water tank...
Cyber-Physical Systems (CPS) are composed of computation, networking, and physical processes. Model-based design is a powerful technique to apply mathematical modeling in CPS design. A model of a physical system is the description of variations in some aspects and properties of the system such as motion, velocity, and pressure. The variations of physical quantities such as motion, velocity, and pressure...
The purpose of this paper is to present the achievement of the Hybrid Petri Nets techniques used for modeling and behavioral analysis of a class of hybrid systems. In our sense, a dynamic hybrid system contains at least two distinct subsystems which interact: a continuous subsystem (linear, or not) and a discrete subsystem with a finite number of states. In this context, after a brief introduction...
Energy management system (EMS) using renewable energy such as sunlight is expected to build a low-carbon society. In this paper, we report the modeling of EMS components using SPICE (simulation program with integrated circuit emphasis) and the estimation of the energy self-sufficiency rate by EMS simulation. We develop the simulation models of photovoltaic (PV) power generation system, storage battery...
In order to study the charging characteristics of aerospace dielectric materials and analyze the influence of the material thickness on the equilibrium potential and the charging time, the differential equation of the surface potential is obtained. The charging expression of the ground simulation space charged process can be attained by solving the differential equation, the simulation curves comparing...
The transportation sector is greatly responsible for air pollution. Therefore, electric vehicles can play an important role in the near future in order to improve the air quality in cities and metropolitan areas. In general, we cannot assume that the electricity for charging batteries is only generated by renewable energy sources. For this reason, the aim of this work is to present the development...
In this paper a novel axial-flux segmented rotor switched reluctance motor (AFSSRM) with a stator sandwiched by two rotors with a particular form of the segments is presented. The machine has magnetic short paths with no flux reversal and the active magnetic parts are made of soft magnetic composites. An in-wheel AFSSRM, specially intended for direct drive of light motorcycles, is designed. Electromagnetic...
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