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Particle swarm optimization (PSO) has been proven to be a simple yet effective algorithm for searching the optimal solutions of objective functions. The main advantage of PSO is its simplicity, but it easily gets stuck in local optima. In order to remain the original merit and raise its performance, a novel idea is proposed in this paper, which selects the best model of PSO based on the previous performance...
This paper considers the sliding mode control (SMC) for a class of state delayed systems subject to persistent disturbances. First, a disturbance compensator is proposed to eliminate the influence from persistent disturbances, and the stability of control system is discussed. Then, the control problem is transformed into sliding mode control problem for state delayed system without expression of disturbances...
Technological complexity and faster revision have led to an increasingly complicated design process; hence, there is great interest in such issues as efficiency and reliability. The focus of this paper is a conceptual (in contrast to mathematical or logical) analysis to assist in accomplishing such a task. Specifically, the paper focuses on the design phase of functional decomposition, in which an...
In situations when several participants collaborate with each other, it is desirable to come up with a fair way to divide the resulting gain between the participants. Such a fair way was proposed by John von Neumann and Oscar Morgenstern, fathers of the modern game theory. However, in some situations, the von Neumann-Morgenstern solution does not exist. To cover such situations, we propose to use...
A new architecture of class-D amplifier with a multibit delta-sigma modulator control is presented in this paper. In the presented amplifier, the 3-bit 8-level digital outputs of the second-order delta-sigma modulator are utilized to generate switching signals with different pulse widths for the class-D power amplifier. A closed-loop class-D amplifier is adopted by feeding the analog output signal...
The paper addresses the problem of sensor location regarding the solvability of the disturbance decoupling problem in finite automata. Two methods are given to find the measured output, which guarantees the solvability of the disturbance decoupling problem. Besides being of interest itself, the solution of this problem allows to address the disturbance decoupling problem in hybrid systems.
Safety requirements are of great importance in Railway Interlocking Systems. However it is still very difficult to obtain all of the safety requirements in practice. In this paper, we propose an approach to capture safety requirements based on safety requirements patterns. From a variety of sources, such as interlocking tables and existing safety relevant functional requirements of railway interlocking...
This paper describes a low power 2.4GHz receiver front end with wideband frequency shift keying (FSK) modulation and a two-point modulation fractional-N PLL in 65nm CMOS. The wideband FSK relaxes design requirements of building blocks in the receiver, thus enabling low power and low complex receiver performance. To avoid the image-rejection problem of the conventional heterodyne receiver as well as...
Learning OOP for novice learners remains a major problem for many students at University level. Students still find OOP concepts difficult to grasp. They are not able to grasp the easiest OOP topic and they are asked to move to another topic. Therefore, this paper illustrates a concept which was tested with 10 students to ease OOP learning process for novice learners. The approach mainly consists...
In this position paper we identify the design of “wise systems” as an open research problem addressing new technology-based systems. Increasing complexity and sophistication make those systems hard to understand and to master. Human users are very often involved in learning processes that capture all their attention while being of little interest for them. To alleviate human interaction with such...
Reconfiguration of radial distribution system is a significant way of altering the power flow through the lines. This paper presents a novel method to interpret the network reconfiguration problem with an objective of minimizing real power loss and simultaneously, improving the voltage profile in radial distribution system (RDS). A Meta-heuristic Particle swarm optimization (PSO) is used to reconfigure...
In this paper; a single-stage three-loop power factor correction (PFC) technique is proposed for DC-DC converters used as driver for LED lights. The technique is demonstrated on a dc-dc Cuk converter which is used as driver for LED lamps wherein a two-zero; two pole digital compensator is used in the three-loop control structure for power factor correction. The converter is designed to operate in...
The multilevel inverters are extensively used in high voltage and high power dc-ac applications but these are of possibility of buck conversion type. The boosting of output voltage is required in the power conversion of dc-dc or dc-ac especially for electric motor vehicles. The effective solutions can be given by using dc-dc boost converter or conventional Z-source inverter. The combination of multilevel...
In this paper, an average current mode controlled DC/DC boost converter is designed for automotive industry applications. The detailed steady-state mathematical modeling and small-signal analysis are carried out. Here, the aim is to design an average current mode controlled DC/DC boost converter having soft switching capability i.e. during start-up the output voltage should gracefully increase and...
A country's economic activity has a direct corelation with the energy scenario of that country. With the increase in the power demand and limited fossil fuels the renewable energy source plays a vital role to overcome these challenges. This paper presents a comparative study and performance analysis of synchronous SEPIC Converter and synchronous Zeta Converter by using PV system with MPPT technique...
The paper presents new topology for flyback converter which can be used for various applications. Generally in a flyback converter there is one primary winding and other secondary winding. But new topology deals with the introduction of tertiary winding which would create multiple outputs on secondary side. On one side there will be traditional DC output and on the other side there will be AC output...
The maximum power point tracker/controller extracts maximum power from the PV module. Therefore, an intensive research has been going on to design an effective and efficient method to transfer maximum power from PV module to load. This paper presents an overview of some classical MPPT methods such as Perturb and Observe (P&O), Incremental Conductance (IC), Fuzzy Logic Controller (FLC) and introduces...
In the recent era, distributed generation, micro grid, and smart grid has gained the attention and has become an important area of research to find solutions to overcome the difficulties raised due to energy crisis. Renewable energies derived from natural sources that are renewed continually and have various forms. Electricity and heat obtained from solar, wind, geothermal, hydropower, biomass, and...
This paper deals with the stochastic point location (SPL) problem which can be described as: a learning mechanism (LM) determines the optimal point on the line and it only receives the stochastic information from the environment, which guides LM the direction it should move. Scholars have proposed various methods to solve this problem, and the latest method hierarchical stochastic searching on the...
We focus on designing efficient flow monitoring algorithms in SDN/OpenFlow by fully exploiting all three polling mechanisms, poll-single, poll-some and poll-all. Notably, the poll-some mechanism has not been adopted by any existing flow monitoring algorithm due to the inflexible match structure standardized in the early version of the OpenFlow specification. To enable the poll-some mechanism, we need...
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