Pub Date : 2019-01-01DOI: 10.31534/engmod.2018.3.ri.05m
Xiaoen Wu, Pingyuan Yang, Junhua Chen
Deformation and failure of brittle material under compression are different from those under tension. The differences are characteristic for the brittle material such as rock, concrete and others. At present, few constitutive models for rock can reflect the differences. A damage-induced softening model for rock constitutive relations is presented based on statistical strength theory, continuum damage mechanics and elastic mechanics. The model can consider properties of rock mechanics such as strain softening, difference in strength between compression and tension, nonliner stress-strain relation, compressive hardening, brittleness and so on. The model is welladapted, simple and practical as it is flexible and has only 7 parameters which can be easily obtained from uniaxial test under compression and tension. Under triaxial compression, uniaxial compression and uniaxial tension, the stress-strain relations obtained from the presented model are compared with those obtained from laboratory tests. The comparisons show that the differences between results obtained respectively from the presented model and laboratory tests are small. The presented model is rational.
{"title":"The strain softening model of rock damage under compression and tension","authors":"Xiaoen Wu, Pingyuan Yang, Junhua Chen","doi":"10.31534/engmod.2018.3.ri.05m","DOIUrl":"https://doi.org/10.31534/engmod.2018.3.ri.05m","url":null,"abstract":"Deformation and failure of brittle material under compression are different from those under tension. The differences are characteristic for the brittle material such as rock, concrete and others. At present, few constitutive models for rock can reflect the differences. A damage-induced softening model for rock constitutive relations is presented based on statistical strength theory, continuum damage mechanics and elastic mechanics. The model can consider properties of rock mechanics such as strain softening, difference in strength between compression and tension, nonliner stress-strain relation, compressive hardening, brittleness and so on. The model is welladapted, simple and practical as it is flexible and has only 7 parameters which can be easily obtained from uniaxial test under compression and tension. Under triaxial compression, uniaxial compression and uniaxial tension, the stress-strain relations obtained from the presented model are compared with those obtained from laboratory tests. The comparisons show that the differences between results obtained respectively from the presented model and laboratory tests are small. The presented model is rational.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.3.ri.05m","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996513","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}
Pub Date : 2019-01-01DOI: 10.31534/engmod.2018.4.si.07s
Huilong Fan, Yongbin Qin
This paper aims to overcome the defects of the existing multi-label classification methods, such as the insufficient use of label correlation and class information. For this purpose, an improved probabilistic neural network for multi-label classification (ML-IPNN) was developed through the following steps. Firstly, the traditional PNN was structurally improved to fit in with multi-label data. Then secondly, a weight matrix was introduced to represent the label correlation and synthetize the information between classes, and the ML-IPNN was trained with the backpropagation mechanism. Finally, the classification results of the ML-IPNN on three common datasets were compared with those of the seven most popular multi-label classification algorithms. The results show that the ML-IPNN outperformed all contrastive algorithms. The research findings brought new light on multi-label classification and the application of artificial neural networks (ANNs).
{"title":"Multi-Label Classification Based on the Improved Probabilistic Neural Networ","authors":"Huilong Fan, Yongbin Qin","doi":"10.31534/engmod.2018.4.si.07s","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.07s","url":null,"abstract":"This paper aims to overcome the defects of the existing multi-label classification methods, such as the insufficient use of label correlation and class information. For this purpose, an improved probabilistic neural network for multi-label classification (ML-IPNN) was developed through the following steps. Firstly, the traditional PNN was structurally improved to fit in with multi-label data. Then secondly, a weight matrix was introduced to represent the label correlation and synthetize the information between classes, and the ML-IPNN was trained with the backpropagation mechanism. Finally, the classification results of the ML-IPNN on three common datasets were compared with those of the seven most popular multi-label classification algorithms. The results show that the ML-IPNN outperformed all contrastive algorithms. The research findings brought new light on multi-label classification and the application of artificial neural networks (ANNs).","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.07s","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997083","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}
Pub Date : 2019-01-01DOI: 10.31534/engmod.2018.4.si.04g
Xuanxuan Zhang
The decision-making of logistics vehicle scheduling is difficult under varying constraints, multiple disturbances and strong time-variation. The multi-agent system (MAS) is a new approach to investigate the real-time decision-making of logistics vehicle scheduling. It satisfies the various requirements of the logistics system, such as the geographical distribution of vehicles, the dynamic changes of information, and the constant changes in consumer orders. In view of the theoretical and practical significance of the MAS, this paper explores the decision-making of logistics vehicle scheduling based on the MAS, and relies on two-level planning modelling method to construct the mathematical model of outsourcing-based container port vehicle scheduling problem. Then, an effectively exchange neighbourhood tabu search algorithm was designed to solve the model. Through the research, it is concluded that the proposed hierarchical decomposition method of logistics distribution task can reduce the overall scheduling difficulty and reduce the actual planning error effectively; the established MAS-based intelligent logistics scheduling model can minimize the total distribution cost through continuous adjustment of resources according to the distribution task. Finally, the feasibility of the proposed algorithm was verified by the results of a calculation example.
{"title":"Automatic Task Matching and Negotiated Vehicle Scheduling for Intelligent Logistics System","authors":"Xuanxuan Zhang","doi":"10.31534/engmod.2018.4.si.04g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.04g","url":null,"abstract":"The decision-making of logistics vehicle scheduling is difficult under varying constraints, multiple disturbances and strong time-variation. The multi-agent system (MAS) is a new approach to investigate the real-time decision-making of logistics vehicle scheduling. It satisfies the various requirements of the logistics system, such as the geographical distribution of vehicles, the dynamic changes of information, and the constant changes in consumer orders. In view of the theoretical and practical significance of the MAS, this paper explores the decision-making of logistics vehicle scheduling based on the MAS, and relies on two-level planning modelling method to construct the mathematical model of outsourcing-based container port vehicle scheduling problem. Then, an effectively exchange neighbourhood tabu search algorithm was designed to solve the model. Through the research, it is concluded that the proposed hierarchical decomposition method of logistics distribution task can reduce the overall scheduling difficulty and reduce the actual planning error effectively; the established MAS-based intelligent logistics scheduling model can minimize the total distribution cost through continuous adjustment of resources according to the distribution task. Finally, the feasibility of the proposed algorithm was verified by the results of a calculation example.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.04g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996887","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}
Pub Date : 2019-01-01DOI: 10.31534/ENGMOD.2018.3.RI.06D
Yuanxiang Zhang, L. Liang, Dongdong Zhu
ENGINEERING MODELLING 31 (2018) 3, 79-93 79 The effects of grain structure on electromigration failure of the lead-free solder bump Yuanxiang Zhang(1), Lihua Liang(2), Dongdong Zhu(1) (1) Key Laboratory of Air-driven Equipment Technology of Zhejiang Province, Quzhou University, Quzhou 324000, CHINA e-mail: zhangyx@qzu.zj.cn (2) College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, CHINA
{"title":"The effects of grain structure on electromigration failure of the lead-free solder bump","authors":"Yuanxiang Zhang, L. Liang, Dongdong Zhu","doi":"10.31534/ENGMOD.2018.3.RI.06D","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.3.RI.06D","url":null,"abstract":"ENGINEERING MODELLING 31 (2018) 3, 79-93 79 The effects of grain structure on electromigration failure of the lead-free solder bump Yuanxiang Zhang(1), Lihua Liang(2), Dongdong Zhu(1) (1) Key Laboratory of Air-driven Equipment Technology of Zhejiang Province, Quzhou University, Quzhou 324000, CHINA e-mail: zhangyx@qzu.zj.cn (2) College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, CHINA","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.3.RI.06D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996567","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}
Pub Date : 2019-01-01DOI: 10.31534/engmod.2018.4.si.08s
Chao Zhang, Yudan Yang, Su Pan
The Smart Cross Platform guarantees content compatibility of various smart devices and supports numerous programming languages, which is a solution to increasing development productivity. The SVM (Smart Virtual Machine) is the core virtual machine of the smart cross platform. This paper presents a technology which allows the SVM previously operating on smart devices to operate in the web environment. In the whole design and implementation of the SVM operating in the web based environment, this paper focuses on the interpreter, which is used as a method to execute the contents.
{"title":"A Cooperative High-Speed Positioning Control System for Dual-Axis Permanent-Magnet Linear Motor","authors":"Chao Zhang, Yudan Yang, Su Pan","doi":"10.31534/engmod.2018.4.si.08s","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.08s","url":null,"abstract":"The Smart Cross Platform guarantees content compatibility of various smart devices and supports numerous programming languages, which is a solution to increasing development productivity. The SVM (Smart Virtual Machine) is the core virtual machine of the smart cross platform. This paper presents a technology which allows the SVM previously operating on smart devices to operate in the web environment. In the whole design and implementation of the SVM operating in the web based environment, this paper focuses on the interpreter, which is used as a method to execute the contents.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.08s","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997164","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}
Pub Date : 2019-01-01DOI: 10.31534/ENGMOD.2018.3.RI.02F
Mario Veić, S. Jozić, D. Bajić
Super duplex stainless steels are alloys that have good corrosion resistance properties and are intended for applications in corrosive environments. Due to their chemical composition and microstructure providing high strength and thermal resistance as well as high ductility, the machinability of these alloys is difficult, resulting in longer production cycles and higher costs in terms of more frequent replacement of tools. In this paper, the machinability of the super duplex EN 1.4410 was investigated under environmentally friendly machining process by using cold compressed air as a coolant. Experimental data were generated using the range of selected input parameters and correspondingly analysed surface roughness as output data. Predictive models were developed in order to make a comparison of their prediction performance. In addition, this paper also describes the methodology for optimised development of a particular predictive model. Finally, comparative analysis of the accuracy of predictive models was performed in order to define which model represents the best fit for the analysed experimental data, and also to show validity of the optimisation process.
{"title":"Surface roughness modelling in super duplex stainless steel turning","authors":"Mario Veić, S. Jozić, D. Bajić","doi":"10.31534/ENGMOD.2018.3.RI.02F","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.3.RI.02F","url":null,"abstract":"Super duplex stainless steels are alloys that have good corrosion resistance properties and are intended for applications in corrosive environments. Due to their chemical composition and microstructure providing high strength and thermal resistance as well as high ductility, the machinability of these alloys is difficult, resulting in longer production cycles and higher costs in terms of more frequent replacement of tools. In this paper, the machinability of the super duplex EN 1.4410 was investigated under environmentally friendly machining process by using cold compressed air as a coolant. Experimental data were generated using the range of selected input parameters and correspondingly analysed surface roughness as output data. Predictive models were developed in order to make a comparison of their prediction performance. In addition, this paper also describes the methodology for optimised development of a particular predictive model. Finally, comparative analysis of the accuracy of predictive models was performed in order to define which model represents the best fit for the analysed experimental data, and also to show validity of the optimisation process.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.3.RI.02F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996445","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}
Pub Date : 2019-01-01DOI: 10.31534/engmod.2018.4.si.03g
Zou Xia, Wu Yaohua, Xiao Delong, Chen Yunxia
In this paper operating-time models for single and multiple instructions are set up considering an AVS/RS (automated vehicle storage and retrieval system). The operation times of AVS/RS and AS/RS (automated storage and retrieval system) are simulated in different situations by changing the shelf structure and order density. The results show that the AVS/RS is more efficient than the AS/RS in all situations. Furthermore, the numbers of rows and columns of storage shelves greatly influence the operation time. The graph of operation-time compression ratio against number of columns shows an inverted U-type distribution, and the compression ratio decreases and ultimately tends to zero as the number of rows is increased. Also, the order density affects the efficiency difference between the two systems: the higher the order density, the higher the AVS/RS operatingtime compression rate. Finally, compared with the AS/RS, the AVS/RS operating-time compression ratio improves greatly with increasing density and number of rows because of parallel operations, whereas with decreasing density and number of rows the AVS/RS advantages are gradually lost and the compression ratio decreases and eventually even reaches zero.
{"title":"Dynamic Modelling of an Automated Vehicle Storage and Retrieval System and a Simulation Analysis of its Efficiency","authors":"Zou Xia, Wu Yaohua, Xiao Delong, Chen Yunxia","doi":"10.31534/engmod.2018.4.si.03g","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.03g","url":null,"abstract":"In this paper operating-time models for single and multiple instructions are set up considering an AVS/RS (automated vehicle storage and retrieval system). The operation times of AVS/RS and AS/RS (automated storage and retrieval system) are simulated in different situations by changing the shelf structure and order density. The results show that the AVS/RS is more efficient than the AS/RS in all situations. Furthermore, the numbers of rows and columns of storage shelves greatly influence the operation time. The graph of operation-time compression ratio against number of columns shows an inverted U-type distribution, and the compression ratio decreases and ultimately tends to zero as the number of rows is increased. Also, the order density affects the efficiency difference between the two systems: the higher the order density, the higher the AVS/RS operatingtime compression rate. Finally, compared with the AS/RS, the AVS/RS operating-time compression ratio improves greatly with increasing density and number of rows because of parallel operations, whereas with decreasing density and number of rows the AVS/RS advantages are gradually lost and the compression ratio decreases and eventually even reaches zero.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.03g","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69996695","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}
Considering the importance of the receiver (RX) selection strategy for the packet success probability (PSP) in ad hoc network, this paper probes into the PSPs with nearest RX selection strategy and farthest RX selection strategy and determines the number of hops with the two strategies. Next, the performance of the successful transmission probability (STP) and PSP were discussed through numerical simulation with the above mentioned two strategies. The simulation results show that the PSP is affected by the terminal density, the RX selection strategy, the packet length and the STP; the number of hops mainly depends on the terminal density, the RX selection strategy, the length between the source TX and the destination RX. Furthermore, the nearest RX selection strategy and the farthest RX selection strategy differ insignificantly in the packet transmission duration between source TX to destination RX at a small terminal density.
{"title":"The Influence of Receiver Selection Strategy on Packet Success Probability in Ad Hoc Network","authors":"Nana Li, Changhai Chen, Dongyao Zou, Shaolei Zhang","doi":"10.31534/engmod.2018.4.si.06s","DOIUrl":"https://doi.org/10.31534/engmod.2018.4.si.06s","url":null,"abstract":"Considering the importance of the receiver (RX) selection strategy for the packet success probability (PSP) in ad hoc network, this paper probes into the PSPs with nearest RX selection strategy and farthest RX selection strategy and determines the number of hops with the two strategies. Next, the performance of the successful transmission probability (STP) and PSP were discussed through numerical simulation with the above mentioned two strategies. The simulation results show that the PSP is affected by the terminal density, the RX selection strategy, the packet length and the STP; the number of hops mainly depends on the terminal density, the RX selection strategy, the length between the source TX and the destination RX. Furthermore, the nearest RX selection strategy and the farthest RX selection strategy differ insignificantly in the packet transmission duration between source TX to destination RX at a small terminal density.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2018.4.si.06s","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997057","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}
Pub Date : 2019-01-01DOI: 10.31534/engmod.2019.1.ri.02m
A. Harapin, Jure Radni, Marina Sunara Kusi
The paper presents the numerical model developed for the simulation of the fluid-structure interaction problem. The model is based on the so called “partition scheme”, in which the Smoothed Particle Hydrodynamics (SPH) method is used for the fluid and the standard Finite Element Method (FEM), based on shell elements, is used for the structure. Then, the two solvers are coupled to obtain the behaviour of the coupled fluid-structure system. The effects of large displacements and small strains are taken into account in the model for shells. The elasto-plastic material model for the structure (shell), which includes some important nonlinear effects like yielding in compression and tension, is briefly discussed. Some of the model’s possibilities are illustrated in a practical example of a rectangular medium sized fluid tank with rigid and deformable walls under several ground excitations.
{"title":"Numerical Model for Fluid-Structure Interaction by the Coupled SPH and the FEM Method","authors":"A. Harapin, Jure Radni, Marina Sunara Kusi","doi":"10.31534/engmod.2019.1.ri.02m","DOIUrl":"https://doi.org/10.31534/engmod.2019.1.ri.02m","url":null,"abstract":"The paper presents the numerical model developed for the simulation of the fluid-structure interaction problem. The model is based on the so called “partition scheme”, in which the Smoothed Particle Hydrodynamics (SPH) method is used for the fluid and the standard Finite Element Method (FEM), based on shell elements, is used for the structure. Then, the two solvers are coupled to obtain the behaviour of the coupled fluid-structure system. The effects of large displacements and small strains are taken into account in the model for shells. The elasto-plastic material model for the structure (shell), which includes some important nonlinear effects like yielding in compression and tension, is briefly discussed. Some of the model’s possibilities are illustrated in a practical example of a rectangular medium sized fluid tank with rigid and deformable walls under several ground excitations.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/engmod.2019.1.ri.02m","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997028","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}
Pub Date : 2018-09-07DOI: 10.31534/ENGMOD.2018.1-2.RI.02_VJAN
Ibrahim K. Mohammed, Abdulla I. Abdulla
Wireless Capsule Endoscope (WCE) is a new medical device that can be used for examining the whole digestive tract if effectively actuated. In this paper, a new three-coil actuator is proposed for the capsule endoscope navigation system. The proposed system, which is based on the currentcontrolled magnetic levitation concept, utilises a small permanent magnet within the capsule body and an arrangement of controlled electromagnet actuator placed on a movable frame. The dynamics of the proposed control system is modelled mathematically and then formulated in state space form. In this research, the Linear Quadratic Regulator (LQR) technique is used for designing a 3DOF controller for the capsule actuation system. Artificial Bee Colony (ABC) tuning algorithm is used for obtaining optimum values for controller gain parameters. The optimised LQR controller is simulated by using the Matlab/Simulink tool, and its performance is then evaluated based on the stability and control effort parameters to validate the proposed system. Finally, the simulation results suggest that the LQR controller based on the ABC optimisation method can be adopted to synthesise an effective capsule actuation system.
{"title":"Design of optimised linear quadratic regulator for capsule endoscopes based on artificial bee colony tuning algorithm","authors":"Ibrahim K. Mohammed, Abdulla I. Abdulla","doi":"10.31534/ENGMOD.2018.1-2.RI.02_VJAN","DOIUrl":"https://doi.org/10.31534/ENGMOD.2018.1-2.RI.02_VJAN","url":null,"abstract":"Wireless Capsule Endoscope (WCE) is a new medical device that can be used for examining the whole digestive tract if effectively actuated. In this paper, a new three-coil actuator is proposed for the capsule endoscope navigation system. The proposed system, which is based on the currentcontrolled magnetic levitation concept, utilises a small permanent magnet within the capsule body and an arrangement of controlled electromagnet actuator placed on a movable frame. The dynamics of the proposed control system is modelled mathematically and then formulated in state space form. In this research, the Linear Quadratic Regulator (LQR) technique is used for designing a 3DOF controller for the capsule actuation system. Artificial Bee Colony (ABC) tuning algorithm is used for obtaining optimum values for controller gain parameters. The optimised LQR controller is simulated by using the Matlab/Simulink tool, and its performance is then evaluated based on the stability and control effort parameters to validate the proposed system. Finally, the simulation results suggest that the LQR controller based on the ABC optimisation method can be adopted to synthesise an effective capsule actuation system.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31534/ENGMOD.2018.1-2.RI.02_VJAN","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42354760","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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