Abstract Systems for remote monitoring and control on energy consumption, efficiency and proper operation of the controlled objects are very often used in different spheres of industry, building automation, electricity distribution network etc. Various types of intelligent energy meters, PLCs and other control devices are involved in such systems. On the other hand, soft starters are widely used in industry and building automation for control on asynchronous drives when the speed regulation is not a mandatory requirement. They are cheaper than inverters and frequency converters and allow temporal reduction of the torque and current surge during start-up, as well as smooth deceleration. This is why the study of the principles of operation and setting up of intelligent energy meters, soft starters and PLC is very important. A laboratory system has been designed and built. An asynchronous motor is controlled by a soft starter and remote monitoring and control by contemporary devices has been provided. A methodology of design and setting up has been developed.
{"title":"Design and Setting up of a Laboratory Drive System with Remote Monitoring and Control","authors":"V. Dimitrov","doi":"10.1515/itc-2017-0024","DOIUrl":"https://doi.org/10.1515/itc-2017-0024","url":null,"abstract":"Abstract Systems for remote monitoring and control on energy consumption, efficiency and proper operation of the controlled objects are very often used in different spheres of industry, building automation, electricity distribution network etc. Various types of intelligent energy meters, PLCs and other control devices are involved in such systems. On the other hand, soft starters are widely used in industry and building automation for control on asynchronous drives when the speed regulation is not a mandatory requirement. They are cheaper than inverters and frequency converters and allow temporal reduction of the torque and current surge during start-up, as well as smooth deceleration. This is why the study of the principles of operation and setting up of intelligent energy meters, soft starters and PLC is very important. A laboratory system has been designed and built. An asynchronous motor is controlled by a soft starter and remote monitoring and control by contemporary devices has been provided. A methodology of design and setting up has been developed.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124023855","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 A linear programming model is proposed for interpretation of the problem for allocation of resources between a finite number of consumption stores at which the risks occurring are considered. At that linear constraints are imposed between the resources in the detached points and between the risks occurring at that. Results are obtained related to reducing this problem to a general Linear Programming (LP) program in which optimal solution is sought for minimization of the expenses for allocation of the resources as well as for taking the risks. A numerical realization of the linear model proposed is carried out that confirms the theoretical results received.
{"title":"Optimal Allocation of Resources at Risks Occurring in the Nodes of a Network","authors":"V. Sgurev, S. Drangajov","doi":"10.1515/itc-2017-0021","DOIUrl":"https://doi.org/10.1515/itc-2017-0021","url":null,"abstract":"Abstract A linear programming model is proposed for interpretation of the problem for allocation of resources between a finite number of consumption stores at which the risks occurring are considered. At that linear constraints are imposed between the resources in the detached points and between the risks occurring at that. Results are obtained related to reducing this problem to a general Linear Programming (LP) program in which optimal solution is sought for minimization of the expenses for allocation of the resources as well as for taking the risks. A numerical realization of the linear model proposed is carried out that confirms the theoretical results received.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133043300","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 A mathematical model of a cascade of two continuously stirred anaerobic bioreactors is presented in this paper and the extremum seeking control is applied on it. The dilution rate of the first bioreactor is chosen as control action and the joint biogas flow rate both bioreactors is the measured output to be maximized. The concentration of inlet organics is accepted as the disturbance. The correction of the working volume of the second bioreactor is studied as the inner loop of the cascade control system. The outer control loop is represented by the extremum seeking controller, which finds the optimum control action and reacts to the disturbance. Computer simulation studies show the feasibility of this scheme.
{"title":"Mathematical Modelling and Extremum Seeking Control of Cascade of Two Bioreactors for Production of Hydrogen and Methane","authors":"V. Lakov, E. Chorukova, I. Simeonov","doi":"10.1515/itc-2017-0022","DOIUrl":"https://doi.org/10.1515/itc-2017-0022","url":null,"abstract":"Abstract A mathematical model of a cascade of two continuously stirred anaerobic bioreactors is presented in this paper and the extremum seeking control is applied on it. The dilution rate of the first bioreactor is chosen as control action and the joint biogas flow rate both bioreactors is the measured output to be maximized. The concentration of inlet organics is accepted as the disturbance. The correction of the working volume of the second bioreactor is studied as the inner loop of the cascade control system. The outer control loop is represented by the extremum seeking controller, which finds the optimum control action and reacts to the disturbance. Computer simulation studies show the feasibility of this scheme.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"14 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134132515","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 Facility Management is an important part in the commercial buildings and installations lifecycle, which includes permanent checks and monitoring of all systems and installations, helping to achieve the organizational objectives. The execution of activities of Maintenance and Inspection is often redistributed to contracted service providers which raises the issue of managing and supervising the results of work done. The major factor for proper execution of distributed tasks is the formalization of the activities in manner of who-what-when-why-how has to be done to accomplish the work. These rules have to be used as guidelines during the tasks execution and for the purpose of managing and supervising the overall progress of maintenance activities.
{"title":"Compliance between ANSI/ACCA/ASHRAE 180 and ANSI/ISA-95 for Maintenance Management","authors":"P. Vasilev, V. Filipov","doi":"10.1515/itc-2017-0025","DOIUrl":"https://doi.org/10.1515/itc-2017-0025","url":null,"abstract":"Abstract Facility Management is an important part in the commercial buildings and installations lifecycle, which includes permanent checks and monitoring of all systems and installations, helping to achieve the organizational objectives. The execution of activities of Maintenance and Inspection is often redistributed to contracted service providers which raises the issue of managing and supervising the results of work done. The major factor for proper execution of distributed tasks is the formalization of the activities in manner of who-what-when-why-how has to be done to accomplish the work. These rules have to be used as guidelines during the tasks execution and for the purpose of managing and supervising the overall progress of maintenance activities.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133516420","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 In the context of learning new skills by imitation for children with special educational needs, we propose Wireless Kinect-NAO Framework (WKNF) for robot teleoperation in real time based on Takagi-Sugeno (T-S) Fuzzy Inference System. The new solutions here are related to complex whole-body motion retargeting, standing body stabilization, view invariance and smoothness of robot motions. The raw depth Kinect data are fuzzified and processed by median filter. The joint angles estimation for motion mapping of Human to NAO movements is based on fuzzy logic and featured angles rather than direct angles are calculated by Inverse Kinematics due to differences in the human and robot kinematics. During the joint angles calculation nonlinearities are observed as a result of ambiguity of Kinect 3D joint coordinates in different offsets. NAO kinematic limitations and nonlinearities in workspace are decomposed and linearly approximated by T-S fuzzy rules of zero and first order that have local support in 2D projections. To prevent the robot to fall down, the center of mass is considered in order NAO to stay within a support and safe polygon. The feasibility of the proposed framework has been proven by real experiments.
{"title":"Wireless Kinect-NAO Framework Based on Takagi-Sugeno Fuzzy Inference System","authors":"A. Lekova, A. Krastev, I. Chavdarov","doi":"10.1515/itc-2017-0023","DOIUrl":"https://doi.org/10.1515/itc-2017-0023","url":null,"abstract":"Abstract In the context of learning new skills by imitation for children with special educational needs, we propose Wireless Kinect-NAO Framework (WKNF) for robot teleoperation in real time based on Takagi-Sugeno (T-S) Fuzzy Inference System. The new solutions here are related to complex whole-body motion retargeting, standing body stabilization, view invariance and smoothness of robot motions. The raw depth Kinect data are fuzzified and processed by median filter. The joint angles estimation for motion mapping of Human to NAO movements is based on fuzzy logic and featured angles rather than direct angles are calculated by Inverse Kinematics due to differences in the human and robot kinematics. During the joint angles calculation nonlinearities are observed as a result of ambiguity of Kinect 3D joint coordinates in different offsets. NAO kinematic limitations and nonlinearities in workspace are decomposed and linearly approximated by T-S fuzzy rules of zero and first order that have local support in 2D projections. To prevent the robot to fall down, the center of mass is considered in order NAO to stay within a support and safe polygon. The feasibility of the proposed framework has been proven by real experiments.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"11 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131956904","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 In this paper, a software system for 2-dimensional and 3-dimensional modeling of frozen and not frozen logs and prismatic wood materials is used as a basis for optimization of the thermal treatment process of such materials. Then, the dependence of the optimal heating time on various parameters is approximated by means of neural networks. This would allow a fast real-time computation of the optimal heating time instead of performing extensive numerical simulations of the model comprised of partial differential equations.
{"title":"Application of Neural Networks to the Optimization of the Thermal Treatment Process of Wood Materials","authors":"M. Hadjiski, N. Deliiski, A. Grancharova","doi":"10.1515/itc-2017-0016","DOIUrl":"https://doi.org/10.1515/itc-2017-0016","url":null,"abstract":"Abstract In this paper, a software system for 2-dimensional and 3-dimensional modeling of frozen and not frozen logs and prismatic wood materials is used as a basis for optimization of the thermal treatment process of such materials. Then, the dependence of the optimal heating time on various parameters is approximated by means of neural networks. This would allow a fast real-time computation of the optimal heating time instead of performing extensive numerical simulations of the model comprised of partial differential equations.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121411132","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 most serious appearance of modern malware is Botnet. Botnet is a fast growing problem that is still not well understood and studied. One widely spreading variant of the botnet attacks is an IRC botnet. There are a number of techniques to detect botnet attacks and infections, but they do not have the functionality to prevent malicious botnet activity. The development of a quality equipment to detect and remove botnet infection needs a good simulation environment that is safe and fully meets the functionality of botnet DoS attacks. The paper presents the features of the implementation of network simulator for DoS attacks. The simulator allows creating different attacks with various parameters. Some performance experiences are performed and the obtained results are shown.
{"title":"Network Simulator for Botnet DoS Attacks","authors":"Y. Aleksieva, H. Valchanov","doi":"10.1515/itc-2017-0020","DOIUrl":"https://doi.org/10.1515/itc-2017-0020","url":null,"abstract":"Abstract The most serious appearance of modern malware is Botnet. Botnet is a fast growing problem that is still not well understood and studied. One widely spreading variant of the botnet attacks is an IRC botnet. There are a number of techniques to detect botnet attacks and infections, but they do not have the functionality to prevent malicious botnet activity. The development of a quality equipment to detect and remove botnet infection needs a good simulation environment that is safe and fully meets the functionality of botnet DoS attacks. The paper presents the features of the implementation of network simulator for DoS attacks. The simulator allows creating different attacks with various parameters. Some performance experiences are performed and the obtained results are shown.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132423963","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 In software architecture the dynamic structure of a software system can be described in terms of components and connectors and expressed through the use of Architectural Description Languages (ADLs). We present jADL, a new ADL, designed for the creation and validation of dynamic and mobile architectures. It, also, aims to help towards the process of “unifying” the definition and implementation of an architecture in a way that the final result is consistent with the architecture in terms of both functional requirements and quality attributes. In this paper, we examine into details the definition and expression of jADL’s architectural elements; components, connectors, ports, roles and behaviour describing statements – attach, detach, config, bind. The attributes of synchronicity and multiplicity concerning the connections between architectural elements are presented. A special case of connections is presented – the bind statement and the construction of composite architectural elements. Also, a case study of the client-server dynamic model in jADL is presented and the possibilities of jADL for dynamic reconfiguration are explored.
{"title":"Architecture Evolution through Dynamic Reconfiguration in jADL","authors":"A. Papapostolu, D. Birov","doi":"10.1515/itc-2017-0019","DOIUrl":"https://doi.org/10.1515/itc-2017-0019","url":null,"abstract":"Abstract In software architecture the dynamic structure of a software system can be described in terms of components and connectors and expressed through the use of Architectural Description Languages (ADLs). We present jADL, a new ADL, designed for the creation and validation of dynamic and mobile architectures. It, also, aims to help towards the process of “unifying” the definition and implementation of an architecture in a way that the final result is consistent with the architecture in terms of both functional requirements and quality attributes. In this paper, we examine into details the definition and expression of jADL’s architectural elements; components, connectors, ports, roles and behaviour describing statements – attach, detach, config, bind. The attributes of synchronicity and multiplicity concerning the connections between architectural elements are presented. A special case of connections is presented – the bind statement and the construction of composite architectural elements. Also, a case study of the client-server dynamic model in jADL is presented and the possibilities of jADL for dynamic reconfiguration are explored.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"8 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131829753","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 A hybrid algorithm for searching the global minimum of a multimodal function is proposed in the paper. It is a two stages search technique, the first stage is the twice carrier wave based chaotic optimization algorithm (COA) for global searching, and the second stage is the gradient descent algorithm (GDA) for accurate local searching. The chaotic dynamics is realized through one-dimensional map in three variants: logistic, cubic and sine map. Three testing functions are used. A hundred simulations (each starting from different initial point generated randomly) were carried out for each of the test functions using two optimization algorithms: the proposed hybrid algorithm and the GDA working alone. The success and accuracy of locating the extremum, as well as the convergence of the algorithms using the three different chaotic maps were discussed.
{"title":"Global Optimization Algorithm Based on One-Dimensional Chaotic Maps and Gradient Descent Technique","authors":"D. Tsankova, S. Lekova","doi":"10.1515/itc-2017-0018","DOIUrl":"https://doi.org/10.1515/itc-2017-0018","url":null,"abstract":"Abstract A hybrid algorithm for searching the global minimum of a multimodal function is proposed in the paper. It is a two stages search technique, the first stage is the twice carrier wave based chaotic optimization algorithm (COA) for global searching, and the second stage is the gradient descent algorithm (GDA) for accurate local searching. The chaotic dynamics is realized through one-dimensional map in three variants: logistic, cubic and sine map. Three testing functions are used. A hundred simulations (each starting from different initial point generated randomly) were carried out for each of the test functions using two optimization algorithms: the proposed hybrid algorithm and the GDA working alone. The success and accuracy of locating the extremum, as well as the convergence of the algorithms using the three different chaotic maps were discussed.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124801576","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 paper deals with a developed mathematical model describing the operation of automatic system for controlling of cross-flow water turbine in laboratory conditions. Fuzzy governor is synthesized and the transient processes in the system are compared toward these ones during utilization of classical PD controller. The results from numerical experiment are presented in graphical form.
{"title":"Synthesis of Fuzzy Controller for Cross-Flow Water Turbine","authors":"K. Ormandzhiev, S. Yordanov, S. Stoyanov","doi":"10.1515/itc-2017-0017","DOIUrl":"https://doi.org/10.1515/itc-2017-0017","url":null,"abstract":"Abstract The paper deals with a developed mathematical model describing the operation of automatic system for controlling of cross-flow water turbine in laboratory conditions. Fuzzy governor is synthesized and the transient processes in the system are compared toward these ones during utilization of classical PD controller. The results from numerical experiment are presented in graphical form.","PeriodicalId":336799,"journal":{"name":"Information Technologies and Control","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131132225","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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