In this research the influence of wire electrical discharge machining on surface roughness and volumetric material removal rate is conducted. With use of experimental result analysis, design of experiments method and mathematical modeling, the correlation between corresponding parameters and process output characterization are studied. The investigated input parameters include electrical current, pulse-off time, open- circuit voltage and gap voltage. With use of experimental results and, subsequently, with exploitation of variance analysis, importance and effective percentages of each parameter are studied. In order to find optimal conditions, outputs extracted from Non-dominated Sorting Genetic and Tabu search algorithms compared with each other led in achieving appropriate models. Tabu search algorithm and Non-dominated Sorting Genetic Algorithm were compared with each other proving the superiority of Non-dominated Sorting Genetic Algorithm over Tabu search algorithm in optimizing machining parameters.
{"title":"Comparison of Intelligent Optimization Algorithms for Wire Electrical Discharge Machining Parameters","authors":"A. Golshan, S. Gohari, A. Ayob","doi":"10.1109/CIMSIM.2011.32","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.32","url":null,"abstract":"In this research the influence of wire electrical discharge machining on surface roughness and volumetric material removal rate is conducted. With use of experimental result analysis, design of experiments method and mathematical modeling, the correlation between corresponding parameters and process output characterization are studied. The investigated input parameters include electrical current, pulse-off time, open- circuit voltage and gap voltage. With use of experimental results and, subsequently, with exploitation of variance analysis, importance and effective percentages of each parameter are studied. In order to find optimal conditions, outputs extracted from Non-dominated Sorting Genetic and Tabu search algorithms compared with each other led in achieving appropriate models. Tabu search algorithm and Non-dominated Sorting Genetic Algorithm were compared with each other proving the superiority of Non-dominated Sorting Genetic Algorithm over Tabu search algorithm in optimizing machining parameters.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123209186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract — The article presents a Fuzzy structure for a Model Predictive Control (MPC) system. MPC theorem has earlier been incorporated with fuzzy models. Such an integration provides controller design methods for an MPC control system. The paper concentrates on aspects of fuzzy based MPC for multivariable systems. Mathematical formulation of linearized MPC is utilized to introduce the concept of fuzzy based MPC scheme, then fuzzy MPC is constructed based on a modeled pH reactor. Results have shown that although the plant was nonlinear in characteristics, but still the employed Neuro-fuzzy system was able to model the plant into three different linear regions.
{"title":"Synthesizing Fuzzy Based Model Predictive Controller","authors":"Ebrahim A. Mattar, K. Mutib","doi":"10.1109/CIMSIM.2011.29","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.29","url":null,"abstract":"Abstract — The article presents a Fuzzy structure for a Model Predictive Control (MPC) system. MPC theorem has earlier been incorporated with fuzzy models. Such an integration provides controller design methods for an MPC control system. The paper concentrates on aspects of fuzzy based MPC for multivariable systems. Mathematical formulation of linearized MPC is utilized to introduce the concept of fuzzy based MPC scheme, then fuzzy MPC is constructed based on a modeled pH reactor. Results have shown that although the plant was nonlinear in characteristics, but still the employed Neuro-fuzzy system was able to model the plant into three different linear regions.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126603727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to satisfy the growing demand for individualization within the automotive sector, the concept of mass customization has been continuously evolving over the past years. As a consequence, the complexity within the underlying data structures has been steadily increasing. In this article we introduce an approach of how to ensure consistency within car manufacturing data with the help of a Multi-Valued Decision Diagram (MDD). The data basis of the car manufacturing application is not derived from higher level models and therefore lacks structural information. For large real world applications, the corresponding MDD cannot be constructed due to memory limitations even if well-known dynamic variable reordering techniques are used. Therefore, a combination of three dynamic variable reordering approaches and the sorting of the sequence of data compilation are introduced. Using this algorithm, the decision diagram can now be constructed with a low memory consumption in reasonable time.
{"title":"MDD-based Verification of Car Manufacturing Data","authors":"Rüdiger Berndt, Peter Bazan, K. Hielscher","doi":"10.1109/CIMSIM.2011.40","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.40","url":null,"abstract":"In order to satisfy the growing demand for individualization within the automotive sector, the concept of mass customization has been continuously evolving over the past years. As a consequence, the complexity within the underlying data structures has been steadily increasing. In this article we introduce an approach of how to ensure consistency within car manufacturing data with the help of a Multi-Valued Decision Diagram (MDD). The data basis of the car manufacturing application is not derived from higher level models and therefore lacks structural information. For large real world applications, the corresponding MDD cannot be constructed due to memory limitations even if well-known dynamic variable reordering techniques are used. Therefore, a combination of three dynamic variable reordering approaches and the sorting of the sequence of data compilation are introduced. Using this algorithm, the decision diagram can now be constructed with a low memory consumption in reasonable time.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126590893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, we consider the utility maximization problem for proportional fairness using capacity with outage. Firstly, we formulate a log utility maximization problem in case of perfect orthogonal channels. With the gradient algorithm of convex optimization problem, we present the implementation algorithm for maximizing utility of capacity with outage. Also, we extend the result to the case with interference due to non-orthogonal channels. Finally, with the information of an outage indicator, we propose the estimation algorithm for average signal-to-interference-noise ratio (SINR) of wireless links. From numerical results, we confirm that the utility of capacity with outage is maximized and the average performance of proposed algorithm converges to the desired maximizing point.
{"title":"Proportional Fair Scheduling Using Capacity with Outage in Rayleigh Fading CDMA Wireless Networks","authors":"J. Jeon, Jaehyun Ko, Jong-Tae Lim","doi":"10.1109/CIMSIM.2011.71","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.71","url":null,"abstract":"In this paper, we consider the utility maximization problem for proportional fairness using capacity with outage. Firstly, we formulate a log utility maximization problem in case of perfect orthogonal channels. With the gradient algorithm of convex optimization problem, we present the implementation algorithm for maximizing utility of capacity with outage. Also, we extend the result to the case with interference due to non-orthogonal channels. Finally, with the information of an outage indicator, we propose the estimation algorithm for average signal-to-interference-noise ratio (SINR) of wireless links. From numerical results, we confirm that the utility of capacity with outage is maximized and the average performance of proposed algorithm converges to the desired maximizing point.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126221753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper the effect of the absorber layer and n-layer properties such as thickness and doping concentration on the electrical characteristic of the a-Si:H/a-SiGe:H thin film hetero structure solar cells such as photo-generation rate, recombination rate and electric field through the cell is investigated. Introducing Ge atoms to the Si lattice in Si-based solar cells is an effective approach in improving their characteristics. Especially, current density of the cell can be enhanced without deteriorating its open circuit voltage. Optimization shows that for an appropriate Ge concentration, the efficiency of a-Si: H/a-SiGe solar cell is improved by about 6.5% compared with the traditional a-Si: H solar cell. This work presents a novel numerical evaluation and optimization of amorphous silicon double junction (a-Si:H/a-SiGe:H) thin film solar cells and focuses on optimization of a-SiGe:H mid-gap single junction solar cell based on the optimization of the Ge content in the film, thick nesses of the i-layer and n-layer, and doping concentration of the films. Maximum efficiency of 23.5%, with short circuit current density of 265 A/m2 and open circuit voltage of 1.13V for double junction solar cell has been achieved.
{"title":"Efficiency Improvement by Optimization of Absorber Layer and n-Layer in a-Si: H/a-SiGe:H Advanced Thin Film Solar Cells","authors":"A. Kosarian, P. Jelodarian","doi":"10.1109/CIMSIM.2011.83","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.83","url":null,"abstract":"In this paper the effect of the absorber layer and n-layer properties such as thickness and doping concentration on the electrical characteristic of the a-Si:H/a-SiGe:H thin film hetero structure solar cells such as photo-generation rate, recombination rate and electric field through the cell is investigated. Introducing Ge atoms to the Si lattice in Si-based solar cells is an effective approach in improving their characteristics. Especially, current density of the cell can be enhanced without deteriorating its open circuit voltage. Optimization shows that for an appropriate Ge concentration, the efficiency of a-Si: H/a-SiGe solar cell is improved by about 6.5% compared with the traditional a-Si: H solar cell. This work presents a novel numerical evaluation and optimization of amorphous silicon double junction (a-Si:H/a-SiGe:H) thin film solar cells and focuses on optimization of a-SiGe:H mid-gap single junction solar cell based on the optimization of the Ge content in the film, thick nesses of the i-layer and n-layer, and doping concentration of the films. Maximum efficiency of 23.5%, with short circuit current density of 265 A/m2 and open circuit voltage of 1.13V for double junction solar cell has been achieved.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126301748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hero Modares, R. Salleh, Amirhossein Moravejosharieh
Wireless sensor networks (WSN) are generally set up for gathering records from insecure environment. Nearly all security protocols for WSN believe that the opponent can achieve entirely control over a sensor node by way of direct physical access. The appearance of sensor networks as one of the main technology in the future has posed various challenges to researchers. Wireless sensor networks are composed of large number of tiny sensor nodes, running separately, and in various cases, with none access to renewable energy resources. In addition, security being fundamental to the acceptance and employ of sensor networks for numerous applications, also different set of challenges in sensor networks are existed. In this paper we will focus on security of Wireless Sensor Network.
{"title":"Overview of Security Issues in Wireless Sensor Networks","authors":"Hero Modares, R. Salleh, Amirhossein Moravejosharieh","doi":"10.1109/CIMSIM.2011.62","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.62","url":null,"abstract":"Wireless sensor networks (WSN) are generally set up for gathering records from insecure environment. Nearly all security protocols for WSN believe that the opponent can achieve entirely control over a sensor node by way of direct physical access. The appearance of sensor networks as one of the main technology in the future has posed various challenges to researchers. Wireless sensor networks are composed of large number of tiny sensor nodes, running separately, and in various cases, with none access to renewable energy resources. In addition, security being fundamental to the acceptance and employ of sensor networks for numerous applications, also different set of challenges in sensor networks are existed. In this paper we will focus on security of Wireless Sensor Network.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125014059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article proposed the model predictive control method to stabilize the Lorenz-type chaotic attitude of a satellite. The attitude equation of a satellite is a six-dimensional nonlinear system, which includes some types of nonlinear behavior such as periodic trajectory, chaotic dynamics. The Lorenz-type chaotic attitude system is adopted in this study. A generalized predictive controller is applied to this class of chaotic dynamical attitude equations to suppress the chaos and regulate the state trajectory of this system to a desire fixed point. Simulation results demonstrate that the proposed method can satisfy the control object and enhanced stability as well as ease of tuning.
{"title":"Lorenz-Type Chaotic Attitude Control of Satellite through Predictive Control","authors":"A. Mohammadbagheri, M. Yaghoobi","doi":"10.1109/CIMSIM.2011.34","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.34","url":null,"abstract":"This article proposed the model predictive control method to stabilize the Lorenz-type chaotic attitude of a satellite. The attitude equation of a satellite is a six-dimensional nonlinear system, which includes some types of nonlinear behavior such as periodic trajectory, chaotic dynamics. The Lorenz-type chaotic attitude system is adopted in this study. A generalized predictive controller is applied to this class of chaotic dynamical attitude equations to suppress the chaos and regulate the state trajectory of this system to a desire fixed point. Simulation results demonstrate that the proposed method can satisfy the control object and enhanced stability as well as ease of tuning.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132558713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Nwizege, Friday M. Good, Anthony N. Taneh, S. Neenwi
Dedicated Short Range Communication (DSRC) designed to be built in to every vehicle for safety and commercial non-safety application, is a robust technology that is supported by IEEE 802.11p standard due to the mobility of vehicle that cannot be avoidable. High data rate is one of the requirements for devices operating in this category. As with such, there is need for vehicles to change data rate depending on channel condition. In this paper, we have present a detailed simulation on two popular rate algorithms, Onoe and AARF in an infrastructure wireless network, and evaluation of results for different metrics is carried out.
{"title":"Performance Analysis of Adaptive Rate Mechanism for IEEE 802.11p in DSRC for Road Safety Application in Vehicular Networks","authors":"K. Nwizege, Friday M. Good, Anthony N. Taneh, S. Neenwi","doi":"10.1109/CIMSIM.2011.72","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.72","url":null,"abstract":"Dedicated Short Range Communication (DSRC) designed to be built in to every vehicle for safety and commercial non-safety application, is a robust technology that is supported by IEEE 802.11p standard due to the mobility of vehicle that cannot be avoidable. High data rate is one of the requirements for devices operating in this category. As with such, there is need for vehicles to change data rate depending on channel condition. In this paper, we have present a detailed simulation on two popular rate algorithms, Onoe and AARF in an infrastructure wireless network, and evaluation of results for different metrics is carried out.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130107569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Use of sensor in data path to predict circuit failure before major errors occur in circuit performance due to reliability issues, especially negative bias temperature instability (NBTI), is common in new scaled CMOS circuits. In this paper, circuit failure prediction by timing degradation is employed to monitor semiconductor aging. For safe operation, we propose on-chip, on-line aging monitoring. The new aging sensor architecture is based on the behavior of inverter when the direct current is passing through the device. This sensor has less complexity and area overhead, while it provides higher speed with respect to similar sensors presented in the literature.
{"title":"A Novel Sensor for Prediction of Aging Failure","authors":"Zhila Amini-shehsdeh, A. Nabavi","doi":"10.1109/CIMSIM.2011.79","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.79","url":null,"abstract":"Use of sensor in data path to predict circuit failure before major errors occur in circuit performance due to reliability issues, especially negative bias temperature instability (NBTI), is common in new scaled CMOS circuits. In this paper, circuit failure prediction by timing degradation is employed to monitor semiconductor aging. For safe operation, we propose on-chip, on-line aging monitoring. The new aging sensor architecture is based on the behavior of inverter when the direct current is passing through the device. This sensor has less complexity and area overhead, while it provides higher speed with respect to similar sensors presented in the literature.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126583125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent years, robotic gripper is widely used for different tasks in various fields. Grippers operate with industrial robots for handling and manipulation of objects. Grippers also operate with hard automation for assembling; micro assembling, machining and packaging. In this paper, a smart robotic gripper is designed and developed with vision sensor for industrial applications. This vision sensor is employed to detect the presence of the object and send the information to the robot. Gripper with two fingers has been proposed. This smart gripper adopts force sensor that mounted into the finger tip in order to control the force applied when working with wide range of objects that having different weight without slipping or crushing it. Four servo motors are used to drive the four degree of freedom (D. O. F) of a robotic arm. Basic Stamp 2 microcontroller (BS2) is used as a controller unit to control the position and the movement of the smart gripper. A series of experiment shows that the proposed system is able to detect the present of the object and send the information/command directly to the robot to execute grasping and lifting phase of the object to the desired location that has been assigned.
{"title":"Design and Development of Smart Gripper with Vision Sensor for Industrial Applications","authors":"H. Ali, Low Hoi Hoi, Tei Chen Seng","doi":"10.1109/CIMSIM.2011.89","DOIUrl":"https://doi.org/10.1109/CIMSIM.2011.89","url":null,"abstract":"In recent years, robotic gripper is widely used for different tasks in various fields. Grippers operate with industrial robots for handling and manipulation of objects. Grippers also operate with hard automation for assembling; micro assembling, machining and packaging. In this paper, a smart robotic gripper is designed and developed with vision sensor for industrial applications. This vision sensor is employed to detect the presence of the object and send the information to the robot. Gripper with two fingers has been proposed. This smart gripper adopts force sensor that mounted into the finger tip in order to control the force applied when working with wide range of objects that having different weight without slipping or crushing it. Four servo motors are used to drive the four degree of freedom (D. O. F) of a robotic arm. Basic Stamp 2 microcontroller (BS2) is used as a controller unit to control the position and the movement of the smart gripper. A series of experiment shows that the proposed system is able to detect the present of the object and send the information/command directly to the robot to execute grasping and lifting phase of the object to the desired location that has been assigned.","PeriodicalId":125671,"journal":{"name":"2011 Third International Conference on Computational Intelligence, Modelling & Simulation","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115186151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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