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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 existing half-duplex relay-based device-to-device (D2D) communication equips with single antenna infrastructure and receives and transmits signals in two equivalent slots which lead to poor performance in term of rate achievement. To solve this problem, we propose a new relay-based D2D scheme with two-antenna infrastructure and bring in slot splitting factor to divide one frame into double unequal...
Business process is also a complex area which receives much attention in recent years especially in increasing productivity and saving cost. Meanwhile, situation at the company allows existing business processes to be enlarged. This paper proposed the performance measurement based on coloured petri net simulation of scalable business processes, which has purpose to compare the performance of scalable...
Experience Mapping based prediction controller (EMPC)is a newly developed control strategy which has transformed the learning-prediction-adaptation capability of Human motor control (HMC)into engineering world. The control is achieved by forming input-output mapping of the system to be controlled through direct interaction with it in the intended environment. This paper presents the use of EMPC for...
The world has recently witnessed a great tendency towards rapid urban development. This has been accompanied by an increase in the population and a development in the uses of the land, which changes the reality of transport and increases its problems over time. The city of Mansour suffers from traffic jams in certain parts of its road network due to the increase in population and the shift in the...
This paper presents the circuit model that is used for the cross-coupled charge pump design algorithm. Symbolic description of the pump stage model as an analog functional block for high-voltage application is firstly discussed. Design process has been done by using simplified BSIM model equations assuming the long channel MOSFET. Characteristics have been verified by ELDO Spice and compared with...
Shrinking reserves of natural resources as well as incisive environmental pollution oblige humanity to rethink its generally favored propulsion concept: in the last decade electro-mobility as a refurbished technology gained greater significance once more. Due to political course setting, many German cities are testing Electric Vehicles (EV) especially in public bus transport. To get to the bottom...
Simulation of the traffic flow is an effective approach to resolve the traffic congestion problem and expect to elucidate the traffic congestion mechanism. In this paper, we propose a traffic flow model based on the MLD (Mixed Logical Dynamical) system approach which regard the lane change and overtaking behavior. The research revealed that traffic jam spreads from driving lane to overtake lane.
The article presents results of parametric identification of mechanical part of drive system with permanent magnet synchronous motor by means of heuristic method of Particle Swarm Optimization (PSO). The assumed mechanical part has a complex structure, consisting of two-mass connected by an elastic joint with backlash. The optimization process was designed to find model parameters that assure the...
Misalignment during wireless charging of EVs can lead to low efficiencies (<85%) of power transfer which can lead to thermal issues and high leakage fields. This paper explores the most optimal solution towards a misalignment tolerant system. To that end, a DD-DDQ coil system with series-series compensation combined with an impedance matching control algorithm is explored. A multi-objective optimization...
Medium frequency transformers are an essential part of new energy conversion systems, and are very often subject to non-sinusoidal excitation. Therefore, usual methods to represent magnetic materials behavior inside transformers with electrical equivalent scheme are very limited in this case. This paper focuses on the development of a new model based on the loss separation method. This model is implemented...
The paper considers and substantiates the possibility of using induction motors with frequency regulation instead of special engine types for precision control of large antennas. The dynamic errors arising in control systems during the low Earth orbit (LEO) satellites trajectories tracking are investigated. The simulation results of the test trajectory tracking using different laws of frequency regulation...
The article proposes a new method of digital loop control based on the sharing of digital PID control formula, characterized by preventive assessment of the control object during each control cycle to select the control action. The selected control action for a subsequent control cycle corresponds to the discrete PID control formula that will ensure the best dynamics control parameter during the next...
Recently, in the field of building energy efficiency, many works focused on model based energy management services but developing models consistent with a measured reality is still an issue. Fine physical models with many parameters cannot be adjusted while non-physical models cannot extrapolate to situations never met in the training data. In this paper, pure data models will be implemented with...
This work presents a mathematical model of a mobile robot based on a wheel-mover for the movement on nonlinear ferromagnetic surfaces. The paper consists of the original geometrical relationships between the magnetically-operated wheel-mover's components and an analysis of their properties. The authors created a simulation of a wheel moving on an arbitrary ferromagnetic surface (inclined and vertical)...
In this paper the calculations of the robustness of a network is addressed. After a brief description of the most relevant metrics, our Network Robustness Simulator(NRS) is presented as well as its structure and working model. The NRS computes the robustness I a dynamic scenario, it copes with multiple failures and different types of attack. In particular, the addition of the epidemic based model...
This study presents simulation results of nonholonomic mobile robot control with path planning which is based on Bézier Curves. The purpose of this paper is set to develop a simulation model for differential drive wheeled (DDW) robot by using MATLAB/Simulink environment. Fractional order PID structure is used to increase the tracking performance of DDW robot. Simulation results are compared for the...
In this paper, a new approach to a nonlinear dq model is proposed for transient simulations of a salient-pole wound-rotor synchronous machine with dampers. Despite the nonlinearity between the flux linkage and the current, the comparison with finite element simulations shows that the new model is reliable for saturated transient state of the machine. This method allows to obtain far more accurate...
The simulation of transmission and distribution grids comes with a trade-off between the number of modeled components and the modeling depth on the one hand and the simulation speed on the other hand. An example system of a grid converter of a 2 MW full scale converter system is used to show a step-by-step model order reduction. Starting from a detailed switched model the order reduction is shown...
Simulation represents the major research method in all knowledge domains and a scientifically valid method of estimating the characteristics of complex systems used for decision making in different areas of engineering. The existing and projected systems can be explored effectively using mathematical models (analytical and simulation) implemented on high-performance computers, which act in this case...
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