bluuebunny/crossref_metadata_2025 huggingface dataset:
Strength Analysis of Towing Extending-Retracting Equipment Based on Dynamics and Statics
Authors: Zhou Zhi , Yang Xing Man , Zhao Zhi Ming , Chen Gang
Published: February 2014

With the increasing development of ocean engineering, towing extending-retracting equipment used widely is the basic platform realizing the engineer value of towfish. In this paper, the dynamic model of the equipment in rough sea condition is created based on Adams, and the operating parameters are determined by maximum dynamic load, as the input data of static model of the equipment. Then the static models of capture unit, swing arm and base frame are created to calculate the strength respectively. Lastly, from the results, the valuable suggestions are put forward to provide valuable references for optimization design and engineer application in future.
Analysis on Strength of Dropping System Based on Dynamics and Statics
Authors: Yang Xing Man , Zhou Zhi , Xi Gang
Published: February 2014

Shipborne dropping system is used widely in national defense and ocean engineer. Dropping system is moving with ship in voyage, so it's difficult to analyze precisely the strength of dropping system resulting from the complex dynamics. To solve the problem, firstly based on ADAMS software, in the paper the dynamic model is created and analyzed, and maximum load of every part of dropping system is achieved one by one. Then, static analysis of every part is researched to checkout structural strength based on ANSYS software platform, and improving part structure with weak point. In the paper the method and research make sure that the dropping system is safety and available.
Microstructural and Mechanical Characterization of Multipass Friction Stir Processed Al-Mg Alloy
Authors: Pradeep S. , Pancholi Vivek
Published: February 2014

In the present investigation friction stir processing (FSP) is carried out using multipass FSP on a 5086 aluminum alloy to modify microstructure and mechanical properties. Two processing conditions P1 and P2 were used, P1 is carried out at constant rotation speed of 1025 rpm and at a traverse speed of 50 mm/min, P2 is carried out at constant rotation speed of 720 rpm and at a traverse speed of 155 mm/min. Inhomogeneous microstructural distribution was observed across the processed zone. EBSD analysis has been done to evaluate the microstructure. Overlapping passes is showing same grain size in the FSPed material. Material processed using P2 processing condition is showing maximum superplastic ductility. The bulk material produced due to multipass FSP seems to be good for superplastic forming applications.
AMT Control Quality Evaluation Test System Based on CANoe
Authors: Lei Yu Long , Liu Ke , Fu Yao
Published: February 2014

After the analysis of the requirements of starting and shifting process of vehicle equipped with Automatic mechanical Transmission (AMT) system, the AMT control quality evaluation test is designed. The test includes performance test and control strategy benchmarking test. Data from CAN bus and external sensors are collected by CANoe which makes the data synchronization. By processing the collected data, the transmission performance can be evaluated in objective and the feasibility of the test system is also verified.
Fuzzy Control with Adjustable Factors in Tension Control System
Authors: He Fang , Han Jia , Wang Qiang
Published: February 2014

The variable tension control system of strip winding is a nonlinear, strong coupling and time-varying system. Traditional fuzzy controller with fixed control rules cannot obtain the desired control performance of the strip winding system. So the fuzzy control algorithm with adjustable factorαis proposed, and the introduction of adjustable factors can change the fuzzy control rules. The tension fuzzy controller with adjustable factorαis designed, and simulation model of the system is established using Matlab software. The result of simulation shows that tension fluctuation of the tension fuzzy control system with adjustable factor get small, comparing the tension fuzzy control system with adjustable factors with the ordinary tension fuzzy control system. The tension fuzzy control system with adjustable factors has fast system response and strong anti-interference ability.
Friction-Compensating Feedback Linearization Control Applied to a Pneumatic Servo System
Authors: Sobczyk S. Mario R. , Suzuki Ricardo M. , Sarmanho Jr. Carlos A.C. , Perondi Eduardo A.
Published: February 2014

This work proposes a feedback linearization control algorithm to be applied to a pneumatic positioning system. Such algorithm aims to compensate the undesirable effects due to the highly nonlinear dynamic behavior of such type of actuator. A mathematical model of the system is presented and the proposed controller is described. Besides, an analysis is provided of the convergence properties of the closed-loop tracking errors of the system when such controller is used. The main features of the proposed controller are illustrated by means of experimental results and respective discussions.
Model Simplification of Hoses in a Hydraulic Lifting System
Authors: Hou Jiao Yi , Zhang Zeng Meng , Gong Yong Jun
Published: February 2014

Rubber hose is normally adopted in the connection between the lifting cylinders and the control valves. Low bulk modulus of hose reduces the natural frequency of hydraulic system and brings difficulties to the controller design. This paper focuses on the model simplification of hoses in the hydraulic system. First, a hydraulic lifting system is presented in the paper. Then, simulation model of the lifting system is built in AMESim, and the simplified model of hose is conducted using an improved lumped parameter method. Finally, comparative simulations with the proposed model and the original model provided in the software are carried out. Results show that the simplified model can be used to replace the original model in the simulation of hydraulic systems.
The Design and Application of WiFi-Smart Socket in Smart Home
Authors: Huang Li Hua , Ye Xi En , Shi Xin Jun
Published: February 2014

Smart home system mainly consists of home networking, home wireless LAN and the external network components. It will achieve the intelligentize and informatization of the home furnishing. Smart socket is one of which belongs to the smart home terminal devices. This article is to talk about smart socket. The core chips of this system are Texas Instruments CC3000MOD and MSP430FR5739MCU. Using WiFi wireless communications technology control and process signals coming from the side of the handheld PDA. Controller side can support two software platforms IAR or CCS. This design uses IAR workbench. PDA client software using the Android operating system is used to receive and process analog signals from controller side. In this paper, WiFi wireless transmission technology as the basis, based on IEEE802.11b/g wireless protocol, It achieves a WiFi wireless communication system for remote or local client and terminal equipment, enabling the intelligent control of the home furnishing.
A Study on Comparison of Mechanical, Thermal Properties of High Strength Structural Steels at High Temperature
Authors: Kwon In Kyu
Published: February 2014

As the strength of structural steels is increasing, the performance of fire resistance should be evaluated clearly and suggested. While their application has been expanded, the evaluation of the fire resistance is inclined to adopt that derived from ordinary strength steels. In order to compare the fire resistance performance of high strength structural steels at high temperature, databases such as mechanical and thermal properties at elevated temperature were compared with those of Eurocode 3. After comparison, it is recommended that the passive protective material is more needed than those for the ordinary strength structural steels to meet the fire resistance requirement.
Based on T-S Fuzzy Classification of the Double Inverted Pendulum Multi Mode Adaptive Control
Authors: Li Ai Lian , Qi Hong Yu , Liang Li
Published: February 2014

Double Inverted pendulum as an important object of study on robotics and aviation field, is also a major platform for teaching and scientific research.Usually double Inverted pendulum modeling is usually will be linearized processing system, ignoring the effect of the angle of system. But the realization of double inverted pendulum is a nonlinear system, the angle affect the stability control. From the actual situation of double Inverted pendulum motion, double Inverted pendulum system of the input space is divided into 9 sub-space, by T-S fuzzy and feedback gain matrix to select the corresponding state equation, making the system more close to its dynamic performance. The multi mode adaptive control and T-S fuzzy method of combining the successful implementation of double inverted pendulum system simulation and real-time control.The number of rules they use far less than Mamdani fuzzy, but also successfully resolved the fuzzy control algorithm due to the presence of multiple variables and the resulting "rule explosion problem".
A Microscopic Image Sharpness Metric Based on the Local Binary Pattern (LBP)
Authors: Lai Jian Ning , Wang Yi Gang , Fan Sheng Li
Published: February 2014

Microscopic image sharpness metric is very sensitive to illumination changes, so the research of sharpness metric methods which have better robustness to illumination is required. A new method which utilized the specialty of different orientation of Local Binary Pattern (LBP) is proposed. Firstly, the effective information and judge orientation of them at fixed region of the image is extracted. Secondly, different connected pattern is adopted to deal with different orientation region and the most robust LBP image is gotten. Finally, the sharpness metric is measured from the LBP image. The experiment results show that this method can inhibit the influence of illumination to microscopic image sharpness metric, and the stability can be improved by 83.89% averagely and 99.90% maximum.
Mechanical Product Design Wizard Rapid Development Platform Research Based on Axiomatic Design
Authors: Wu Ying Jie , Gao Qi , Liu Gang , Xu Ting
Published: February 2014

In order to reduce time and cost in mechanical product design wizards development work, the Mechanical Product Design Wizard Rapid Development Platform (MPDW-RDP) was established. According to the Independence Axiom, the system architecture of the MPDW-RDP was obtained, then, the MPDW-RDP had been implemented by taking advantage of existing mature software and components in accordance with the Information Axiom, at last, application case indicated that this system can rapidly develop different kinds of mechanical product design wizard.
A Study on Intelligent Parting Line Design of Vehicle Door Based on CATIA CAA
Authors: Bao Jing Ru , Ding Yi , Hu Si Bo , Hu Ping
Published: February 2014

The parting line design for vehicle door is an indispensable step at the phase of auto-body conceptual design, and also the premise of door kinematic analysis. Combined the CATIA CAA platform characteristics with the hinge layout features, we propose an intelligent and semiautomatic algorithm for parting line design and build a layout and checking module based on CATIA software platform. The present method, which originates from an introduced procedure of hinge layout, could define two envelop curves called K-Lines to judge if the given parting line is reasonable. It calculates the minimum clearance size between doors and surrounding parts on each section by using a transform with some settled parameters. In reverse, when the sizes are set to 0s, a serial of extreme start and end points help the engineer to design two new parting lines. An example is carried out with our module and the position relationship between K-lines and parting line are analyzed. The results show that our method has great feasibility and validity to design the parting line and shorten the design periods.
A Joint Improved Irregular Accumulate Concatenated Tree Coding and Frequency Hopping OFDM Modulation Scheme for Wireless Networks
Authors: Geng Fu Quan , Huang Zhi Gang , Ning Xuan Jie , Yang Mao Fan
Published: February 2014

Joint channel coding and spread spectrum modulation technologies bring to wireless networks the tremendous amount of performance improvement, the elimination, and the mitigation of interference. This paper proposes an improved design for irregular accumulate concatenated tree (IACT) codes, which can be viewed as simply precoded by an accumulator. This class of codes belongs to the special turbo-like codes, which combines the advantages of fast encoder structures of turbo codes, and the advantages of parallel high-speed belief-propagation (BP) iterative decoding algorithm of low-density parity-check (LDPC) codes. The improved IACT codes can be coded via a Tanner graph. With these improved codes, we propose a joint IACT coding and frequency hopping orthogonal frequency division multiplexing (FH-OFDM) modulation scheme for wireless networks. We compare the performance of different coding bases such as the irregular concatenated tree (ICT) codes and turbo codes in the scheme by theoretical analysis and simulation. Numerical results are shown that the proposed scheme with these IACT codes has really good performance.
Research on Vibration Signal Feature Extraction Method to the Wind Turbine Generator
Authors: Wu Guo Xin , Zuo Yun Bo , Shi Yan Hui
Published: February 2014

Aiming at the safe operation of the wind turbine, a feature extraction method of vibration signal based on the principle of blind source separation was proposed. Blind source and the current state of fault signal was separated and predicated by Using historical data of wind turbine vibration signal as the observation noise, and then fault diagnosis signal mechanical operation was analyzed, the HMM/SVM series fault diagnosis models structure was proposed. By calculating the matching degree of unknown signal and wind power equipment in the state using HMM, the features for SVM was formed to achieve the finally discriminant. The experimental results showed that the fault diagnosis method can precisely and effectively complete the wind power equipment, higher than pure HMM or SVM diagnostic accuracy.
Tolerances Modeling in Assemblies: An Approach Based on Graphs
Authors: Avila Rondón R.L. , Rodríguez R. Pérez , Cordovés García A. , Avila Alfaro R.P. , Mendoza Núñez Z. , Seañez de Villa J.M. , Estévez Parra E. , Rodríguez Ramírez Y.
Published: February 2014

In the mechanical design process, the interpretation of geometrical and dimensional tolerances is a common task in a products life cycle because tolerances are of decisive importance in the decisions related to cost and quality. At present, there are numerous approaches and investigations related to the modeling of tolerances in mechanical assemblies, related to Computer Aided Design Systems. The goal of this paper is to show a method to modeling an assembly based on a graph map structure, to guarantee the resolution of dimensional chains and tolerance analysis. In this process, which is based on a graph map structure, the dimensional chains associated to the functional requirements that influence the relative location of the parts are determined. A subset of a belt conveyor as an example, illustrates the proposed method.
A Research of Earthquake Marking System Based on 2D GIS with ArcGIS
Authors: Yan Jin Jiang , Zeng Zheng , Liu De Shan
Published: February 2014

Taking ArcEngine as the 2D map symbols marking systems development tool, this study designs a 2D GIS marking desktop application system byusing Ortho vector map as its basic map, and implements such functions as map navigation operation, labelling major targets of earthquake-stricken areas, animation deduction of emergency rescue solutions, and exporting emergency rescue plans, etc.
Neuronetwork Decision Support System for Oilfield Equipment Condition Online Monitoring
Authors: Korovin Iakov S. , Khisamutdinov Maxim V.
Published: February 2014

In this paper we offer the solution of the problem of oil-extracting production efficiency and safety raise by decision support system (DSS) application developed on the artificial neuronetwork technology basis. The description of new database knowledge discovery neuronetwork methods, applied for diagnostics and forecasting is provided. The architecture and the functions of DSS applied for oilfield objects state online monitoring, developed on proposed methods and algorithms basis, is described.
Effect of SO2 on the Performance of LSCF Cathode
Authors: Liu Run Ru , Wang De Jun , Jing Leng
Published: February 2014

Sulfur poisoning effect on the electrochemical performance and long-term durability of SOFC cathode has been investigated for La0.6Sr0.4Co0.2Fe0.8O3(LSCF) by Galvanic Current Interruption (GCI) technology. Cell performance was measured supplying with SO2-containing air to the cathode under a constant current density of 200 mA cm-2. At 800 °C, LSCF cathode showed low tolerance to the sulfur poisoning. SO2tends to react with strontium in LSCF material resulting in the formation of SrSO4in the cathode. This reaction gave rise to microstructural change in the cathode and caused gradual degradation of cell performance.
Study on the 3D Pattern of Hole Wall in Drilling Carbon Fiber Reinforced Plastics Using Orthogonal Experiment
Authors: Li Xue Lin , Li Gui Yu , Li Xing Quan
Published: February 2014

The drilling damage forms of hole wall is presented and the reasons for drilling quality are analyzed in drilling carbon fiber reinforced plastics. Based on the study of experiments, the relationship between the drilling damage and the drilling parameters are obtained. The results indicate that the drilling hole wall forms drawn fiber and fallen off fiber bundle more easily and the surface roughness of hole wall becomes worse with the increase of the spindle speed, and the final drilling surface presents obvious anisotropy. In order to obtain good drilling quality, lower spindle speed should be selected on the premise of lower feed rate.
Review on Surface Failure Mode of Metallic Materials in Very High Cycle Fatigue Regime
Authors: Li Wei
Published: February 2014

With higher cleanness upgraded steadily, surface failure of metallic materials in very high cycle fatigue (VHCF) regime beyond 107 cycles has been reported one after another. The occurrence of surface crack initiation to failure in VHCF regime is closely related to the following factors: (i) surface finishing condition of specimen, i.e. whether some grinding scratches, grooves and cavities with a relatively larger size than the subsurface defect exist at the surface of specimen; (ii) type, size, location, distribution and density of metallurgical defects such as inclusion contained in the subsurface of material; (iii) degree of persistent slip band (PSB) deformation induced by surface roughening of specimen, mainly corresponding to the some ductile single-phase metallic materials.
Fabrication of 6.5wt%Si Composite Plate by Coat Casting and Hot Deformation Processes
Authors: Ji Shuai , Han Jing Tao , Liu Jing
Published: February 2014

The high silicon electrical steel composite plate, which contains Q235 low carbon steel and 10%Si ferrosilicon alloy, is fabricated by coat casting and hot rolling. The bonding strength, microstructure and distribution of elements of the coating and core layers are analysed by the photographs of metallographic phase and EDS. Experimental results show that the high silicon composite plate could carry out lager plastic deformation by conventional hot mill after the 10%Si ferrosilicon alloy coated by Q235 low carbon steel in the vacuum induction furnace. The uniform distribution of elements could be achieved through the diffusion annealing process after the stage of hot rolling processing. This study provides a referable method to produce the 6.5wt% high silicon electrical steel plates.
Microstructure and Tensile Strength of Rapid Manufacturing Parts
Authors: Abd Aziz Izhar , Gabbitas Brian , Stanford Mark
Published: February 2014

The purpose of this work is to investigate the microstructure and tensile strength of Ti6Al4V pre-alloyed powders produced by a direct metal laser sintering technique. Traditionally, Ti6Al4V products for biomedical applications were produced through hot working or machining of wrought semi-finished products. A change in the production route for manufacturing Ti6Al4V products, from the more traditional methods to an additive manufacturing route, requires an investigation of microstructure and mechanical properties because these are strongly influenced by the production route. The microstructure obtained through rapid solidification during laser sintering shows a very fine α+β lamellar morphology. There is also evidence of martensite which was expected due to high solidification rate of the liquid pool from a temperature above the β-transus during the laser sintering process. Structurally, good mechanical properties which are comparable to the bulk material were obtained.
Experimental Study of the Static Modal Analysis on Milling Machine Tool
Authors: Jamil Norlida , Yusoff Ahmad Razlan , Mansor Muhammad Hatifi
Published: February 2014

Machine tool vibrations have great impact on machining process. Modal testing is a form of vibration testing which is able to determine the Frequency Response Function (FRF) of the mechanical test structures. In this paper, the main focus is to identify a procedure to obtain natural frequency values for machine tool components in order to establish better conditions in the cutting process on the machine tool. For this purpose, a 3D model of the machine tools structure is made using design software and exported to analysis software. Later on, the Finite Element Method (FEM) modal analysis was used to obtain the natural frequencies. The model is evaluated and corrected through an experimental modal test. In the experiment, the machine tool vibration is excited by impact hammer and the response of excited vibration is recorded. In the end, the result of both FEM and experimental shows a good consistency in comparison.
Optimization of Electro Discharge Machining Parameters for Drilling Titanium in Small Holes Using Taguchi Method
Authors: Hussain Hazami Che , Yusoff Ahmad Razlan
Published: February 2014

Electro discharge machining (EDM) is a process that use an electric sparks to generate the high temperature and melts the work piece. One of the processes using this method is drilling process. By using this concept, an electro thermal mechanism between electrode and work piece can creates the hole enlargement and the size of the hole its depend on the diameters of electrode are used. The present study performs Taguchi method to investigate the optimal process parameters for high speed super drill machine that was used to make a small hole from titanium alloy (Ti-6: ASTM B348 Grade 5) by using 2.0 mm diameter of copper electrodes. In this experiment, the process parameters namely, current pulse off; maximum current and standard voltage level were selected to optimize. An orthogonal array L9 was employed to analyze the material removal rate (MRR) of the copper electrode of diameter 2.0 mm penetration. The optimum EDM hole process can be established through this method and the major parameters that effect the MRR can be also detected and verified the effectiveness through experimental results.
Study on Potential Waste Insulating Material Properties in Water for Thermal Storage Application
Authors: Shamshir Ali Tanti Zanariah , Rosli Abu Bakar , Ming Gan Leong , Anak Sup Billy , Zainudin Mohd Farid
Published: February 2014

Energy is a continuous driving power for the social and technological development. Developing thermal energy storage(TES) is a competent way to provide continuous power generation. The key issue in designing the TES system is its thermal capacity of storage materials. This study is focusing on the potential waste material as an insulator for thermal energy storage applications. The insulator usage is to reduce the heat transfer between two medium and the capability is measured by its heat flow resistance. The bigger the value, the more blocking capacity or insulating it provides. It is needed to find optimal material to energy conversion at the same time reduce the waste generation. Therefore, a small-scale experimental testing of natural cooling process of an insulated tank within a confined room without any forced cooling system, e.g. fan. The testing is repeated by changing the insulator using the potential waste material from natural and industrial waste. The analysis is performed on the relationship between heat loss and the reserved period by the insulator. The results represent the percentage of period of the insulated tank withstand the heat compared to non-insulated tank, e.g. cotton reserved the period of 19% more than non-insulated tank to withstand the heat transfer of water to the surrounding. The paper finally justifies that cotton is the most potential waste material as an insulator in water.
Cooling System for Electric Motor of an Electric Vehicle Propulsion
Authors: Abdul Karim Zainal Ambri , Mohd Yusoff Abdul Hadi
Published: February 2014

Electric motor performance directly affects the overall performance of an electric vehicle (EV). The electric motor windings heats up when operated under extreme load and hence, reducing the efficiency of the vehicle. As such, EV propulsion system requires cooling systems, not only to the electric motor but also to the battery banks in order to ensure efficient operation and maximizing the electric components and vehicle lifetime. The project focuses on the design and development of a liquid cooling system for an electric vehicle propulsion system to determine the optimum size and cooling capacity by thermodynamic analysis. This paper described the analysis of energy transfer (heat removal) by using thermal resistance network approach in determining the suitable design for the cooling system of an AC-50 induction electric motor. The CAD drawing was generated to suit the dimension constrain and the cooling system was completed using CATIA software. The results showed that the optimal design for the water jacket for the maximum heat removal of 5500 W from the electric motor, should have a wall thickness of 0.5 cm with an annular thickness of 2.4 cm. Both copper and aluminium exhibited similar cooling capabilities with the latter having lower cost and ease of manufacturing.
Effect of Cutting Parameters on Tool-Chip Interface Temperature in an Orthogonal Turning Process
Authors: Sulaiman Shamsuddin , Roshan Amir , Borazjani Soroosh
Published: February 2014

The aim of this paper is to investigate the effect of cutting speed and uncut chip thickness on cutting performance. A Finite Element Method (FEM) based on the ABAQUS explicit software which involves Johnson-Cook material mode and Coulombs friction law was used to simulate of High Speed Machining (HSM) of AISI 1045 steel. In this simulation work, feed rate ranging from 0.05 mm/rev to 0.13 mm/rev and cutting speed ranging from 200 m/min to 600 m/min at three different cutting speeds were investigated. From the simulation results it was observed that increasing feed rate and cutting speed lead to increase temperature and stress distribution at tool/chip interface. The results obtained from this study are highly essential to predict machining induced residual stresses and thermo-mechanical deformation related properties on the machined surface.
From Manufacturing to Logistics: Development of a Kinematic for Autonomous Unloading of Containers
Authors: Echelmeyer Wolfgang , Bonini Marco , Rohde Moritz
Published: February 2014

In many branches of production and manufacturing the level of automation has reached saturation. Further automation would be possible but would also affect negatively their economic efficiency. On the contrary, in logistics the level of automation is low due to the lack of process standardization. This is caused on the one hand by the high number of protagonists involved in global supply chains and on the other hand by the weak demand for standardization that characterizes areas with low costs of labor. Among the logistics processes the highest challenge for automation is the unloading of goods from carriers, i. e. containers, which are used for international and intermodal transports. In containers a wide range of goods is transported among which, unpalettized mass goods have the highest relevance for autonomous unloading, because of their size, shape and weight. Mass goods are arbitrarily packed neatly or loose, stuck or slack patterns and with respect to their properties homogeneous or heterogeneous. Nowadays these containers are unloaded mostly manually. A system for the autonomous unloading of all the kinds of mass goods from containers doesnt exist as a market ready product. This paper presents a kinematic suited to unload all kinds of mass goods from a container.
Robust PID Controller Tuning for 2D Gantry Crane Using Kharitonov's Theorem and Differential Evolution Optimizer
Authors: Solihin Mahmud Iwan , Wen Mah Chia , Heltha Fahri , Lye Lim Chong
Published: February 2014

PID (proportional+integral+derivative) controller is well known as a simple and easy-to-implement controller. However, the design procedure is not straightforward for multi-input multi-output (MIMO) systems. It is even more complicated when robustness criterion must be handled. In this paper, a stable robust PID controller for anti-swing control of automatic gantry crane is proposed. The proposed method employs an automatic tuning using DE (differential evolution) to search for a set of PID controller gains that satisfy Kharitonovs polynomials robust stability criterion. This robust stability criterion is used to deal with parametric uncertainty occurs in gantry crane model. The simulation results show that a satisfactory robust PID control performance can be achieved. The PID controller is able to quickly move the cart of the crane while suppressing the swing of the payload for various conditions, i.e. payload mass and cable length variations.
Finite Element Analysis of Aluminum-Kevlar/Epoxy Pressure Vessel
Authors: Sulaiman Shamsuddin , Borazjani Soroosh , Roshan Amir
Published: February 2014

In this present work, the composite pressure vessel type three has been investigated by finite element method (FEM). The aluminum pressure vessel reinforced with Kevlar/Epoxy (Aramid 149) was analyzed under internal pressure to predict the ultimate failure pressure of the vessel. Also the optimum winding angle which provides the highest strength for the vessel was determined by applying Tsai-Wu and Tsai-Hill failure theories. The asymmetric fiber orientation for six different winding angles was utilized to reinforce the aluminum vessel. The commercial code ABAQUS/CAE was employed to analyze the composite vessel. Results obtained from the simulation were in good consistency with the analytical and the experimental outcomes.
Performance Analysis for a Gantry Crane System (GCS) Using Priority-Based Fitness Scheme in Binary Particle Swarm Optimization
Authors: Jaafar Hazriq Izzuan , Mohamed Zaharuddin , Abidin Amar Faiz Zainal , Md Sani Zamani , Jamian Jasrul Jamani , Kassim Anuar Mohamed
Published: February 2014

This paper presents development of an optimal PID and PD controllers for controlling the nonlinear Gantry Crane System (GCS). A new method of Binary Particle Swarm Optimization (BPSO) algorithm that uses Priority-based Fitness Scheme is developed to obtain optimal PID and PD parameters. The optimal parameters are tested on the control structure to examine system responses including trolley displacement and payload oscillation. The dynamic model of GCS is derived using Lagrange equation. Simulation is conducted within Matlab environment to verify the performance of the system in terms of settling time, steady state error and overshoot. The result not only confirmed the successes of using new method for GCS, but also shows the new method performs more efficiently compared to the continuous PSO. This proposed technique demonstrates that implementation of Priority-based Fitness Scheme in BPSO is effective and able to move the trolley as fast as possible to the desired position with low payload oscillation.
Analysis of Threshold Voltage Variance in 45nm N-Channel Device Using L27 Orthogonal Array Method
Authors: Salehuddin Fauziyah , Zain Anis Suhaila Mohd , Idris Niza Mohd , Yamin Ahmad Kamal Mat , Hamid Afifah Maheran Abdul , Ahmad Ibrahim , Menon P. Susthitha
Published: February 2014

In this research, orthogonal array of L27 in Taguchi Method was used to optimize the process parameters (control factors) variation in 45nm n-channel device with considering the interaction effect. The signal-to-noise (S/N) ratio and analysis of variance (ANOVA) are employed to study the performance characteristics of the device. There are only five process parameters (control factors) were varied for 3 levels to performed 27 experiments. Whereas, the two noise factors were varied for 2 levels to get four readings of Vth for every row of experiment. In this study, nominal-the-best characteristic was used in an effort to minimize the variance of Vth. The results show that the Vth values have least variance and percent different from the target value (0.287V) for this device is 1.42% (0.293V). This value is closer with International Technology Roadmap for Semiconductor (ITRS) prediction.
Effect of Obstacle Angles on Signal Strength for Different Mounting Elevations of XBee Pro Module in Viral Advertisement System
Authors: Yaacob M.R. , Teck L.W. , Anwar N.S.N.
Published: February 2014

This paper presents a study on the effect of obstacle angles on signal strength for different mounting elevations of XBee Pro module. The study has been conducted by using two units of XBee Pro modules which each represents a receiver and a transmitter. The transmitter is mounted in three different elevations which are 0.5, 1.5 and 2.5 meter from the ground while the receiver is fixed at the same elevation but at different positions which yield to different angles. When the transmitter continuously transmits the wireless signal carrying its particular address, the receiver will detect the signal address once the range of communication of both receiver and transmitter intersects. The results obtained are the values of signal strength, in percentage, with respect to the obstacle angles between receiver and transmitter for different mounting elevations of transmitter. These data are then converted into graph that illustrates the signal strength characteristics for each mounting elevation. Finally, the best mounting elevation is to be identified based on the result obtained.
Modeling and Simulation of Swarm Intelligence Algorithms for Parameters Tuning of PID Controller in Industrial Couple Tank System
Authors: Khairuddin Ismail Mohd , Ahmad Dahalan Amira Sarayati , Abidin Amar Faiz Zainal , Lai Yee Yang , Nordin Nur Anis , Sulaiman Siti Fatimah , Jaafar Hazriq Izzuan , Mohamad Syahrul Hisham , Amer Noor Hafizah
Published: February 2014

Industrial tank system is widely used in consumer liquid processing and chemical processing industry. In liquid-based product manufacturing system, one of the main components consists of an industrial tank. This paper explores the applications of two swarm intelligence algorithms in optimizing the PID controller parameters. These swarm intelligence algorithms are Particle Swarm Optimization (PSO) and Firefly Algorithm (FA). Each agent of the swarm intelligence will represent a possible solution of the problem where each dimension corresponds to the PID controllers parameters. Result obtained shows that there are potential in improving these algorithms to replace the conventional way of obtaining PID controllers parameters
Frictional Characteristics of Steel Materials Sliding against Mild Steel
Authors: Chowdhury Mohammad Asaduzzaman , Nuruzzaman Dewan Muhammad , Rahaman Mohammad Lutfar
Published: February 2014

In this study, friction coefficients of different steel materials are investigated and compared. Experiments are carried out when different types of steel discs such as stainless steel 201 (SS 201), stainless steel 301 (SS 301) and mild steel slide against mild steel pin. Experiments are conducted at normal load 5, 7.5 and 10 N, sliding velocity 0.5, 0.75 and 1 m/s and relative humidity 70%. The effects of duration of rubbing on the friction coefficient of different steel materials are investigated. Results show that during friction process, test disc takes less time to stabilize with the increased normal load or sliding velocity. It is found that friction coefficient decreases with the increase in normal load while it increases with the increase in sliding velocity for all the tested materials. As a comparison, it is found that at identical operating conditions, friction coefficients are different for different steel materials depending on normal load or sliding velocity.
Implementation of Quality Management System in Malaysian Construction Industry
Authors: Tiong Kung Leong , Norhayati Mohmad Zakuan , Saman Muhamad Zameri Mat , Md Arif Mohd Shoki , Bahari Ahamad Zaidi
Published: February 2014

This paper sets out to explore the degree of Quality Management System (QMS) implementation in current Malaysian construction industry. This research test these with a questionnaire based on nine major QMS aspects which are gathered from literature review. Data collected was analyzed using Mean and ANOVA. The findings indicate that QMS are implemented in moderate level with slight differences between mean values from various aspects. Besides, top management level respondents react more positive towards implementation of QMS in all aspects compared to middle management level and lower management respondents. Future research will benefit by using different QMS aspects for further improvement and replication to other industries.
A Comprehensive and Practical Framework for Reliable Scheduling in Project Management
Authors: Mansoorzadeh Shiva , Yusof Sha’ri Mohd , Mansoorzadeh Shahriar , Zeynal Hossein
Published: February 2014

Schedule reliability is essential to successfully achieve EPC (engineering, procurement and constriction) project objectives. Several studies in the past were based on traditional risk management technique which has its own limitations that lack one to obtain a reliable project schedule. To overcome these limitations a comprehensive framework is developed based on the integration of risk management and Critical Chain Project Management (CCPM) that can give a much reliable project scheduling. In the proposed framework, risk analysis is first determined through fuzzy FMEA technique to provide identification of critical risk events (CRE). The effect of CRE on project schedule is then defined and total project time which considers risk factors is calculated. To support risk mitigation, fault tree and event tree analysis are combined which allows the root causes of the risk event be defined and also mitigation strategies determined to control each identified CRE. Eventually, CCPM is distributed which enable implementation of the project based on initial plan and to obtain reasonable Feeding Buffer time on risky tasks. This paper presents the proposed framework using a real case study on construction phases of EPC projects in an electrical power industry.
Effect of Different Qualities of Foam on Fill Particle Transport in Horizontal Well Cleanup Operation Using Coiled Tubing
Authors: Khan Javed A. , Pao William K.S.
Published: February 2014

This study focuses on the effect of foam quality on fill concentration during coil tubing cleanup operation. Thus, to quantify such effect, it is required to develop the numerical model to investigate the well cleaning. ANSYS CFX-14 is used for numerical study of fill transport in the horizontal well. A horizontal well geometry (5.76"×3.5" concentric annulus) was created for fill concentration analysis. Present study is carried out with 70, 80 and 90% quality at four different velocities 3, 4, 5 and 6 ft/sec. The results indicated that the 90% quality foam was good even at low velocity.
The Effect of Pressure on Warpage of Dumbbell Plastic Part in Injection Moulding Machine
Authors: Amran Mohd , Salmah Siti , Zaki Mohd , Izamshah Raja , Hadzley Mohd , Sivarao  , Kasim Mohd Shahir , Amri Mohd
Published: February 2014

The optimization of processing parameters on warpage of polypropylene (PP) in the application of injection moulding machine was studied. The appropriate parameters were adjusted to reduce the warpage defect on the tensile test specimen of dumbbell. The type of injection moulding machine used in this research is Arburg 420C 800-250C. Four parameters that have been investigated; injection pressure, clamping pressure, back pressure and holding pressure. A concept of design of experiment (DOE) has been applied using Taguchi method to determine the suitable parameters. To measure the warpage of the dumbbell, digital height gauge was used to measure the flatness of the part surface. According the analysis of variance (ANOVA), the most significant factor that effect the warpage was holding pressure by 57.82%, followed with back pressure by 25.75%, clamping pressure by 16.27% and injection pressure by 0.16%. It is found that the optimum parameters setting that have been obtained were injection pressure at 950 bar, clamping pressure at 600 kN, holding pressure at 700 bar and back pressure at 75 bar. The depreciation value of warpage minimum index in this experiment was decreased by 4.6% after confirmation run.
Feasibility Study of Casted Natural Fibre-LM6 Composites for Engineering Application
Authors: binti Mohd Nurul Farah Adibah , Sahroni Taufik Roni , Abd Kadir Mohammad Hafizudin
Published: February 2014

This paper presents the investigation of casted natural fiber-LM6 composites for engineering application. The objective of this research is to study the feasibility of natural fibre to introduce in the metal matrix composites for sand casting process. LM6 is the core material used in this research while natural fibre used as composite materials as well as to remain the hardness of the materials. The preparation of natural fibre composites was proposed to introduce in metal matrix composite material. Empty Fruit Bunch (EFB) and kenaf fibre were used in the experimental work. Natural fibre is reinforced in the LM6 material by using metal casting process with open mould technique. LM6 material was melted using induction furnace which required 650°C for melting point. The structure and composition of the composite materials is determined using EDX (Energy Dispersive X-ray) to show that fibres are absent on the surface of LM6. The microstructure of casted natural fibre-LM6 composites was presented using Zeiss Scanning Electron Microscope (SEM) with an accelerating voltage of 15kV. As a result, natural fibre composites were feasible to be introduced in metal matrix composites and potential for engineering application.
The Structural and Surface Morphology of Annealed ZnO Films
Authors: Tat Peh Ly , bin Deraman Karim , Hussin Rosli , Wan Shamsuri Wan Nurulhuda , Ibrahim Zuhairi
Published: February 2014

ZnO thin films were deposited on the glass substrates via the sol-gel dip coating method. The films were annealed at various temperatures ranging from 350 °C to 550 °C. X-ray diffraction (XRD), and atomic force microscopy (AFM) were used to investigate the effect of annealing temperature on the structural and morphology properties of the films. The as grown films exhibited amorphous pattern while annealed films were polycrystalline structure with (002) preferential growth along c-axis orientation. The AFM micrographs revealed that the RMS roughness of the films increased as the annealing temperature increased. The grain size was ranging from 32.1 nm to 176.0 nm as the annealing temperature increased from 350 °C to 450 °C and decreased to 56.1 nm for 550 °C.
Surface Roughness of Casted LM6 Using Natural Fibre Sand Casting Mould
Authors: Hafizudin Mohammad , Taufik  , Razali Mohd , Farah Nurul
Published: February 2014

This paper presents the investigation of sand casting process in natural fibre reactions which is utilized kenaf fibre and empty fruit brunch fibre (EFB) in order to reinforce the silica sand casting mould. The investigation was carried out on selecting sand mould which mixture with natural fibre. As a result of surface roughness of kenaf fibre mixed with silica sand, empty fruit bunch fibre mixed with silica sand and silica sand for sand mould was evaluated. The comparison of these three types of sand mould for surface roughness are analysed by using portable surface roughness tester. Technique of mixing the natural fibre and silica sand was presented. The mould was prepared using similar volume of natural fibre between kenaf fibre and empty fruit bunch fibre. The ratio of natural fibre for two type of sand fibre mould using 100 g of natural fibre and 1 kg of silica sand. The third sand mould using only 3.3 kg of silica sand without mixed with natural fibre. Total weight of three type of sand mould is 3.3 kg. Besides, this investigation was employed with 3 mm to 5 mm length range of natural fibre and mixture mutually with silica sand. The addition of natural fibre in the sand casting mould was significantly absorbing the heat of molten metal to the surrounding. As a result, the utilization of kenaf fibre and EFB fibre for sand mould were significant on improving the surface roughness of casted LM6 material.
Assessment of Machining Cost for End-Milling of Ti-6Al-4V Titanium Alloy through RSM-Based Parametric Model
Authors: Karim A.N. Mustafizul , Ikram M. , Emrul Kays H.M. , Abdesselam M. , Ginta T.L.
Published: February 2014

Past few decades have been marked by significant achievements in the development of cutting tools and machining processes. End-milling operation with Polycrystalline Diamond (PCD) cutting tool insert presents a good technical solution for machining difficult-to-cut materials. However, the cost of each technical or technological solution is a major concern in the decision making process. It is quite common for a solution developer to encounter a question like How much will this new method cost? before proceeding for implementation. PCD insert applied as a cutting tool is a recent development and evaluation of economic performance of this cutting tool insert in end-milling of a-difficult-to-cut material such as Ti-6Al-4V titanium alloy can be of significant importance to the manufacturer. However, cost economy depends significantly on the correct choice of cutting conditions especially in the context of cutting parameters. To determine the economically desired levels of the cutting parameters for PCD insert to end-mill Titanium alloy we have presented a RSM-based mathematical model which would help to estimate the cost of removing unit volume of material and to find out the optimum cutting conditions leading to minimum machining cost.
Discussion on Andesite Asphalt Mixture Used as Pavement Lower Surface
Authors: Ding Ya Hui , Shang Fei , Li Shan , Gao Yan
Published: February 2014

Based on the expressway construction from Xilinhaote to Sanggendalai in China, this paper discussed difficulties and solutions of asphalt mixture using andesite aggregate used as pavement lower surface. There are a lot of andesite reserves in Ximeng area, China. However, andesite aggregate has poor adhesion with asphalt bitumen because of its fragile textures, dense surface and low water absorption rate .Consequently the moisture stability of asphalt mixture using andesite aggregate is poor. Meanwhile, the mixture can not be compacted easily due to the hardness of andesite aggregate. In this paper, in order to solve the problem on the poor adhesion and compaction for asphalt mixture using andesite aggregate, different methods were investigated. The results show that adding adhesion agent or using limestone fine aggregate is an effective way to make the asphalt mixture acting as pavement lower surface.