Asian Transactions on Engineering

Volume: 02, Issue: 01, March 2012
ISSN 2221-4267

Title: Email Communication Pattern in Global Software Development
Authors: Paulus Insap Santosa and Ridi Ferdiana
Paper ID: ATE-40222015
Pages: 1 - 6
Abstract: The most challenging aspect in global software development is a communication between team members. This problem become more challenging since the team member is separated geographically. In this case, the team should have same vision and mission to achieve the goal of the project. The project goal can be achieved when the team has same cognitive level. Email is one of the most used indirect communications tool to construct same cognitive level. This paper will describe how cognitive perception can be achieved by providing additional information in an email. This research is developed based on several case study in global software development. The result of this research will propose partial solution for the GSD team to use an email as a better communication tool to deliver better software.

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Title: Simulation, Design and Hardware Implementation of a Low Cost Processor
Author: Ateeq A. Khan
Paper ID: ATE-10227012
Pages: 7 - 12
Abstract: Embedded microprocessor has been widely used as a tool for technological innovations and cost reduction for the last forty years. The main characteristic determining its performance are its speed and programmability. Therefore, for a design to be competitive its processor has to fit for the characteristics like: relative inexpensiveness, flexibility, adaptation, speed and re-configurability. A solution to this is the use of Field Programmable Gate Arrays (FPGA). This paper describes the realization of a 4-bit FPGA based simple low cost processor. The system is implemented on the Xilinx Spartan 3 xc3s200FT256 using ISE foundation 9.2i and VHDL. 88(4%) of the slices are used. A maximum frequency of 61.451 MHz was reached with a maximum delay of 10.145 ns.

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Title: Cascade Position Control of Linear Reluctance Motor Fed by SVPWM VSI with Fuzzy Logic Controller
Authors: Khalid Mahdi Abdul-Hassan, Rabee' Hashim Thejeel, Haroutuon A. Hairik
Paper ID: ATE-70212018
Pages: 13 - 17
Abstract: A two-axis dynamic model of linear reluctance motor (LRM) is presented in this paper. The cascade position control with fuzzy logic controller is used to track the position of LRM fed by space vector pulse width modulation (SVPWM) inverter. The simulation results gained using Matlab/Simulink software show that the proposed motor model can give good performance in trackng the position reference using the proposed cascade controller.

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Title: Modeling and Characterization of an Aerosol Generation Chamber
Authors: Mahmudul Hasan, Md. Nurun Nabi, Md. Shamim Akhter
Paper ID: ATE-60225017
Pages: 18 - 24
Abstract: An analytical study has been conducted to determine the physical dimensions (i.e. height and diameter) of a cylindrical aerosol generation chamber in which an atomizer is presumed to generate poly-disperse aerosol from a certain solution. The chamber considered here is both structurally and operationally different from most of the collection devices (e.g. gravitational settling chambers, centrifugal separators, wet scrubbers, filters, electrostatic precipitators etc. reported in the literatures. Expressions for cut-off droplet diameter and subsequently for the velocity and particle displacement history inside the chamber have been developed in this study. For a particular cut-off aerodynamic diameter the motion of the droplets has been realized to be affected by the fluid velocity through the chamber and whether the droplets are in Stoke’s region or not. Finally, it has been concluded that, chamber height is to be determined by the maximum height reached by the largest droplet produced by the atomizer whereas its diameter is determined by fluid velocity within the chamber when atomization pressure and particle cut-off aerodynamic diameter are known. Several experimental results for the same configuration have been found in good agreement.

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Title: Modal Parameter Extraction Based on Hilbert Transform of Modal Responses
Authors: Zheng Min, Shen Fan
Paper ID: ATE-70209018
Pages: 25 - 33
Abstract: Two modal identification methods based on Hilbert Transform of modal responses are used to extract modal parameters of a structure in this paper. First, the acceleration response time history polluted by noises is processed using Empirical Mode Decomposition with Singular Value Decomposition. Then, the frequencies and damping ratios of the system can be estimated by performing Hilbert Transform for obtained modal responses. The mode shapes can be achieved when the responses at all degrees of freedom are measured. The proposed methods are illustrated using a simulated airplane model with dense modes built in ADAMS (Automatic Dynamic Analysis of Mechanical Systems) software. The simulation results demonstrate that the outlined two methods based on Hilbert Transform can identify modal parameters well with the help of EMD and SVD as signal preprocessor even for the structure with the closely space modes, low-energy components.

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Title: Simulink Model of a 3-Level Voltage Fed Soft-Switching Inverter with Two ARDCL Snubbers
Authors: Ali Kadhim Abdul-Abbas , Rabee' Hashim Thejel , Haroutuon A. Hairik
Paper ID: ATE-40206015
Pages: 34 - 44
Abstract: This paper presents a new simulation soft switching three level inverter using MATLAB program. This circuit uses two identical Auxiliary Active Resonant DC Link (ARDCL) snubbers connected to the high voltage DC bus line of three-level inverter. The circuit has the flexibility of selecting switching instants of the resonant link in synchronism with SVPWM technique. Control technique does not require the help of inverter switches to create the zero voltage instants in the main switches. In this paper, the principle of operation and detailed analysis of the proposed ARDCL inverter are presented and design considerations for achieving soft switching are obtained. Detailed MATLAB simulation studies are carried out to study the feasibility of the proposed topology under various load condition.

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