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This paper reports low bit-error-rate (BER) polar codes concatenated low density parity check (LDPC) codes for wireless communication systems. The LDPC code has been validated on the error correction capable to approaching the theoretical value. However, the BER performance of this code is still limited because of the effect of the error floor. Therefore, a concatenated coding scheme based on polar...
The paper proposes a new technique for deadlock control for a class of generalized Petri net (PN) with S4PR net, from the concept of control siphon. One important property of PN is to design structure, in terms of siphons, in order to the characterization of the deadlock prevent, and analytic structure of the synchronization subsystem which is needed to control place in a system. An efficient siphon...
The value of sub-transient reactance depends on the design of damper winding or amortissuer. All synchronous generators have sub-transient reactants even though it does not have damper winding physically. The damper winding can contribute to reduce the sub-transient current when generator in fault condition. The generator quantitative parameters are used to perform the simulation using MATLAB/Simulink...
Distributed Generation (DG) is a sustainable alternative energy paradigm that allows flexible customer-participated demand response management, however when coupled with battery storage in a carbon costed policy setting true reduction of greenhouse gas emissions may not necessarily be rewarded. This paper examines the role of policy settings using an established multi-agent simulation framework that...
Driver-in-the-loop and different human-machine goal consistency should be considered when designing driver-AFS interactive steering control system. In this paper, a novel design approach, namely dynamic game theory is used for the modelling of shared steering control between driver and AFS. Linear Quadratic dynamic optimization approach is used to derive the non-cooperative Nash, non-cooperative Stackelberg,...
In this paper, an improved grid voltage modulated control (GVM) with power compensation is proposed for grid-connected voltage inverters when the grid voltage is unbalanced. The objective of the proposed control is to remove the power ripple and to improve current quality. Three power compensation objectives are selected to eliminate the negative sequence components of currents. The modified GVM method...
In order to test the performance of the motor driver, a power converter can be used to replace the real motor, both of which have the same electrical characteristics. This is a real-time control system. The foremost challenge in this system is the modeling of the real-time motor simulator based on the mathematical model of permanent magnet synchronous motor. This paper introduces the background and...
How to design an effective and efficient load-frequency controller (LFC) for a multi-area interconnected power system to improve its power quality is a challenging issue. In order to deal with this issue, this paper presents a novel distributed fractional-order PID (DFOPID) control method for the load-frequency control of each area by using an adaptive population-based extremal optimization (APEO)...
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...
In this paper, the system-level performance of nonorthogonal multiple access (NOMA) in coordinated direct and relay transmission (CDRT) is investigated. Considering a successive interference cancellation (SIC) receiver under the 3D channel model for LTE, the system-level performance of the NOMA-CDRT is compared to the NOMA in non-coordinated direct and relay transmission (nCDRT). Simulation results...
Sparse code multiple access (SCMA) is a nonorthogonal multiple access scheme based on a multi-dimensional codebook with sparse codewords. The sparsity property of SCMA allows the receiver to take advantage of low-complexity message passing algorithm (MPA) detector with maximum likelihood (ML)-like performance. The use of multiple antennas at the SCMA receiver will improve the detection performance...
This paper analyzes energy cost reduction from peak demand shaving when a CES provider adopts ESS for the CHP-based CES microgrid site in Seoul, Korea. The simulation results show that about 9% of peak shaving can be realized when a 270kWh ESS is used for three thousand CES households. When two or three ESSs are adopted, peak demand shaving increases at most into 12% or 14%, which concludes that ESS...
As a key component of DC medium voltage breaker, the switch mechanism is required to open in high-speed and can withstand the breaking voltage which is generated during opening motion. Thus, the design of driving circuit of switch mechanism is very important to optimize the mechanism structure and improve mechanism opening characteristics. First the motion principle of high-speed switch was given...
A coupled fluid-mechanical dynamics analysis method is presented in this paper. A commercial simulation package is used for mechanical dynamics calculation, which employs user-developed dynamic-link library files as routine interface to enable data exchange with gas pressure calculation. This part is responsible for the calculation of mechanical motion, including the tripping of trip trigger, releasing...
Interruption of short circuit currents in high voltage circuit breakers requires high SF6 gas pressure, which can be generated by compression of SF6 gas and/or energy transfer from the arc. The pressure difference between circuit breaker chambers causes SF6 gas flow. The rise of pressure in the chambers is highly dependent on the design of the circuit breaker. This paper presents a universal approach...
In this paper, using the virtual flight evaluation system, the verification of energy model of a solar-powered UAV considering the flight motion is conducted. The energy sources of a solar-powered UAV are the solar energy and rechargeable batteries. The acquired energy of solar-powered UAV is determined by the sun position and the attitude of a UAV. Therefore, the energy acquisition and consumption...
The world is facing the pandemic of infectious diseases. Together with the development of transportation technology, the global spread of diseases continues to accelerate. To examine the correlation between transportation and infection, we did the statistical analysis on the highway transport and the domestic flight based on the GIS in the South Korea. Consequentially, the traffic movement through...
This paper investigates the deployment of an SDN-based UAV network providing communication service. Such a network is extremely useful in emergency scenarios. In such a network, the mobility of UAVs is minimal. We consider the placement of the SDN controller and its implications in terms of communication overhead and end-to-end delay of the control packets exchanged between the UAVs and the controller...
An original and modern integrated current sensor is designed and presented in this paper. It can provide a sense current proportional to an output current available to the microcontroller via an external resistor. The ratio between output and sense current is modeled and simulated. The errors between the two currents increase in low currents domain. A solution consisting in a gate back regulation...
In vacuum interrupters, anode spot formation is commonly known as a high-current anode discharge mode and it significantly decreases the current interruption capacity of the vacuum interrupters. To understand the mechanism of the anode spot formation, the heat flux density delivered to the anode is of vital importance. The objective of this paper is to determine the peak heat flux density at a transition...
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