Pub Date : 2014-05-22DOI: 10.1109/AQTR.2014.6857833
D. Sas, M. Ungureșan, T. Colosi, M. Secara
This paper presents a control system where the controlled plant is a distributed parameter process. Numerical simulation of the control system is accomplished using the method of Matrix of Partial Derivatives of the State Vector (Mpdx) associated with Taylor Series. By including a process modeled by a partial differential equation of second order with two independent variables, this presents (Mpdx) method with approximate solutions, which are needed to ensure the start of the calculations and to check the results.
{"title":"Process modeling and simulation of distributed parameter using (Mpdx) method with approximating solutions","authors":"D. Sas, M. Ungureșan, T. Colosi, M. Secara","doi":"10.1109/AQTR.2014.6857833","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857833","url":null,"abstract":"This paper presents a control system where the controlled plant is a distributed parameter process. Numerical simulation of the control system is accomplished using the method of Matrix of Partial Derivatives of the State Vector (Mpdx) associated with Taylor Series. By including a process modeled by a partial differential equation of second order with two independent variables, this presents (Mpdx) method with approximate solutions, which are needed to ensure the start of the calculations and to check the results.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123274570","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857906
E. Dulf, R. Both, C. Muresan
Isotope separation columns are known as complex, nonlinear systems with large, variable time delays. The control of such a process is a difficult task, in specific literature being proposed complex control algorithms. The main goal of the present paper is to design a simple control scheme based on active disturbance rejection method. For accurate modeling of the plant a fractional-order model is used. The active disturbance rejection control (ADRC) considers the gain uncertainty of the fractional-order plant model as a common disturbance. Using a proper observer will reject it. Simulation results are provided to demonstrate the effectiveness of the proposed method.
{"title":"Active disturbance rejection controller for a separation column","authors":"E. Dulf, R. Both, C. Muresan","doi":"10.1109/AQTR.2014.6857906","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857906","url":null,"abstract":"Isotope separation columns are known as complex, nonlinear systems with large, variable time delays. The control of such a process is a difficult task, in specific literature being proposed complex control algorithms. The main goal of the present paper is to design a simple control scheme based on active disturbance rejection method. For accurate modeling of the plant a fractional-order model is used. The active disturbance rejection control (ADRC) considers the gain uncertainty of the fractional-order plant model as a common disturbance. Using a proper observer will reject it. Simulation results are provided to demonstrate the effectiveness of the proposed method.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114285041","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857849
P. Dobra, M. Dobra, D. Moga, I. Sita, R. Munteanu
Continuous improvements in microelectronic circuitry make possible the implementation of process diagnostics to a variety of systems in order to increase performances and reliability. The monitoring stage in the area of failure detection and isolation aims to classify and arrange the failure sources. In case of BLDC machines, one of the most important methods for failure detection and diagnosis starts with the analysis of the variations of the machine estimated parameters. The paper focuses on the implementation details of failure detection and diagnosis based on continuous time parameters estimation of BLDC motor mathematical model. Continuous time parameters are directly related to the physical characterizations of BLDC Motor. The parameters are estimated by the well-known prediction error methods devised for dynamic system identification. By changing the process coefficients and by applying statistical decision methods, failure detection occurs. The case of frequency domain identification in fail detection is also covered on a real CNC machine. Discrete Fourier Transform (DFT) with the particular case of Goertzel algorithms is implemented for fault detection purposes. Unlike existing work and results in the fault detection area, the failure can be detected among time-varying process parameters.
{"title":"Model based fault detection for electrical drives with BLDC motor","authors":"P. Dobra, M. Dobra, D. Moga, I. Sita, R. Munteanu","doi":"10.1109/AQTR.2014.6857849","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857849","url":null,"abstract":"Continuous improvements in microelectronic circuitry make possible the implementation of process diagnostics to a variety of systems in order to increase performances and reliability. The monitoring stage in the area of failure detection and isolation aims to classify and arrange the failure sources. In case of BLDC machines, one of the most important methods for failure detection and diagnosis starts with the analysis of the variations of the machine estimated parameters. The paper focuses on the implementation details of failure detection and diagnosis based on continuous time parameters estimation of BLDC motor mathematical model. Continuous time parameters are directly related to the physical characterizations of BLDC Motor. The parameters are estimated by the well-known prediction error methods devised for dynamic system identification. By changing the process coefficients and by applying statistical decision methods, failure detection occurs. The case of frequency domain identification in fail detection is also covered on a real CNC machine. Discrete Fourier Transform (DFT) with the particular case of Goertzel algorithms is implemented for fault detection purposes. Unlike existing work and results in the fault detection area, the failure can be detected among time-varying process parameters.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115932897","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857873
B. Galdau, N. Plitea, C. Vaida, F. Covaciu, D. Pisla
The design and control of a new parallel robot for brachytherapy is presented. In brachytherapy, a local minimally invasive oncological treatment known also as internal radiation, a needle is placed with high precision, in or near the tumor, to deliver higher doses of radiation. Currently most of the structures used for brachytherapy are designed for easy access areas, more than 70% targeting only the prostate. Due to the positive outcomes of the treatment, there is a big need for a robotic structure that could perform brachytherapy in hard-to-reach areas that are declared inoperable cases. Parallel structures have been widely appreciated for their positioning precision and stiffness, making them a viable option for brachytherapy. The control system and the user interface are presented, followed by some numerical simulations on a scale model.
{"title":"Design and control system of a parallel robot for brachytherapy","authors":"B. Galdau, N. Plitea, C. Vaida, F. Covaciu, D. Pisla","doi":"10.1109/AQTR.2014.6857873","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857873","url":null,"abstract":"The design and control of a new parallel robot for brachytherapy is presented. In brachytherapy, a local minimally invasive oncological treatment known also as internal radiation, a needle is placed with high precision, in or near the tumor, to deliver higher doses of radiation. Currently most of the structures used for brachytherapy are designed for easy access areas, more than 70% targeting only the prostate. Due to the positive outcomes of the treatment, there is a big need for a robotic structure that could perform brachytherapy in hard-to-reach areas that are declared inoperable cases. Parallel structures have been widely appreciated for their positioning precision and stiffness, making them a viable option for brachytherapy. The control system and the user interface are presented, followed by some numerical simulations on a scale model.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123189498","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857855
M. Radu
This paper presents the results of parametric testing of digital ICs using a dedicated Mixed Signal Automatic Testing Equipment. Due to the prohibitive price of the ATE equipment and dedicated Device Interface Board (DIB) for digital Integrated Circuits (ICs), a DIB for analog circuits was used to perform the testing. Despite the challenges presented by the experiments, the results prove to be accurate for the performed tests, according to the data sheet of the digital ICs and production test data provided by the manufacturer.
{"title":"Testing digital circuits using a Mixed-Signal Automatic Test Equipment","authors":"M. Radu","doi":"10.1109/AQTR.2014.6857855","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857855","url":null,"abstract":"This paper presents the results of parametric testing of digital ICs using a dedicated Mixed Signal Automatic Testing Equipment. Due to the prohibitive price of the ATE equipment and dedicated Device Interface Board (DIB) for digital Integrated Circuits (ICs), a DIB for analog circuits was used to perform the testing. Despite the challenges presented by the experiments, the results prove to be accurate for the performed tests, according to the data sheet of the digital ICs and production test data provided by the manufacturer.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123166870","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857835
L. Mic, R. Fat, M. M. Santa, T. Letia
Flexible Manufacturing Systems (FMSs) are complex systems with machines that execute thousands of operation types with complex interactions. Three kinds of problems have to be solved: product specifications, production scheduling and the control the FMS to correctly manufacture the desired products. Wrong control signals can lead to scraps instead of the desired products or often to deadlocks. Current research solves the FMS problems of the wood industry. The production process is considered a Discrete Event System (DES) that can be modeled by Delay Time Petri Nets (DTPN). The control system is hierarchical centralized modeled by Time Petri Net (TPN). Besides the usual textual description of the product specification, the UML (Unified Modeling Language) class diagrams and a formal language, called here Time Petri Net based Language (TPNL), are used. The FMS structure and its capabilities are specified by UML class diagram and DTPN. Using these specifications some examples of the control system were conceived using TPN and TPNL.
{"title":"From product specification to manufacturing control","authors":"L. Mic, R. Fat, M. M. Santa, T. Letia","doi":"10.1109/AQTR.2014.6857835","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857835","url":null,"abstract":"Flexible Manufacturing Systems (FMSs) are complex systems with machines that execute thousands of operation types with complex interactions. Three kinds of problems have to be solved: product specifications, production scheduling and the control the FMS to correctly manufacture the desired products. Wrong control signals can lead to scraps instead of the desired products or often to deadlocks. Current research solves the FMS problems of the wood industry. The production process is considered a Discrete Event System (DES) that can be modeled by Delay Time Petri Nets (DTPN). The control system is hierarchical centralized modeled by Time Petri Net (TPN). Besides the usual textual description of the product specification, the UML (Unified Modeling Language) class diagrams and a formal language, called here Time Petri Net based Language (TPNL), are used. The FMS structure and its capabilities are specified by UML class diagram and DTPN. Using these specifications some examples of the control system were conceived using TPN and TPNL.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130376746","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857824
Manuel A. Hernandez-Mejias, C. Ariño, A. Sala, A. Querol
This work considers fault-tolerant control (FTC) for discrete-time Markov Jump Linear System (MJLS) subject to constraints on the state an control variables. The objective is to design a control law which depends on the jump variable, minimizing an average quadratic function. Improving over previous MJLS literature, input and state constraints are enforced. The initial condition of the system and the transition probability of the Markov chain are available to the controller at each instant of time. Concepts arising from the receding horizon framework and invariant set theory are incorporated in a constrained fault-tolerant predictive control approach.
{"title":"Fault-tolerant predictive control for Markov Linear Systems","authors":"Manuel A. Hernandez-Mejias, C. Ariño, A. Sala, A. Querol","doi":"10.1109/AQTR.2014.6857824","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857824","url":null,"abstract":"This work considers fault-tolerant control (FTC) for discrete-time Markov Jump Linear System (MJLS) subject to constraints on the state an control variables. The objective is to design a control law which depends on the jump variable, minimizing an average quadratic function. Improving over previous MJLS literature, input and state constraints are enforced. The initial condition of the system and the transition probability of the Markov chain are available to the controller at each instant of time. Concepts arising from the receding horizon framework and invariant set theory are incorporated in a constrained fault-tolerant predictive control approach.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132954678","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857842
S. Flonta, Laura Vegh, L. Miclea, I. Stefan, S. Enyedi
A multi-agent system organized hierarchically based on a set of hierarchical keys can analyze, decide and decrypt a message. The message is encrypted using a public key chosen randomly from a set of public keys. The system analyzes and determines the set of keys used for encryption and decrypts the message.
{"title":"Multi-agent system with hierarchical private key","authors":"S. Flonta, Laura Vegh, L. Miclea, I. Stefan, S. Enyedi","doi":"10.1109/AQTR.2014.6857842","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857842","url":null,"abstract":"A multi-agent system organized hierarchically based on a set of hierarchical keys can analyze, decide and decrypt a message. The message is encrypted using a public key chosen randomly from a set of public keys. The system analyzes and determines the set of keys used for encryption and decrypts the message.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115040198","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857850
R. Groza, M. Cirlugea
This paper presents a new Externally Linear Internally Nonlinear (ELIN) programmable gain amplifier (PGA). The topology was derived from a variable gain amplifier by using a current division network (CDN). The gain can be tuned by varying the DC bias currents. Simulation results demonstrate the analytical analysis.
{"title":"Current-mode log-domain programmable gain amplifier","authors":"R. Groza, M. Cirlugea","doi":"10.1109/AQTR.2014.6857850","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857850","url":null,"abstract":"This paper presents a new Externally Linear Internally Nonlinear (ELIN) programmable gain amplifier (PGA). The topology was derived from a variable gain amplifier by using a current division network (CDN). The gain can be tuned by varying the DC bias currents. Simulation results demonstrate the analytical analysis.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115354013","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 : 2014-05-22DOI: 10.1109/AQTR.2014.6857921
R. Drobot, C. Dinu, A. Draghia, M. Adler, C. Corbus, M. Mătreață
The river basins and water management systems are characterized by a high degree of complexity. In order to find the best operation rules of the reservoirs during floods all other time consuming data processing (like flood wave propagation) should be simplified at maximum. For this purpose, the Genetic Programming (GP) approach was used. The GP transfer functions derived for flood propagation provide an excellent agreement with the floods propagation based on Saint Venant equations, but without time and other resources consuming. The synthetic floods of the ungauged tributaries keeping the same probability of exceedance along the main river were derived using regionalization studies. The proposed approach was tested for Sitna and Miletin river, two main tributaries of Jijia river.
{"title":"Simplified approach for flood estimation and propagation","authors":"R. Drobot, C. Dinu, A. Draghia, M. Adler, C. Corbus, M. Mătreață","doi":"10.1109/AQTR.2014.6857921","DOIUrl":"https://doi.org/10.1109/AQTR.2014.6857921","url":null,"abstract":"The river basins and water management systems are characterized by a high degree of complexity. In order to find the best operation rules of the reservoirs during floods all other time consuming data processing (like flood wave propagation) should be simplified at maximum. For this purpose, the Genetic Programming (GP) approach was used. The GP transfer functions derived for flood propagation provide an excellent agreement with the floods propagation based on Saint Venant equations, but without time and other resources consuming. The synthetic floods of the ungauged tributaries keeping the same probability of exceedance along the main river were derived using regionalization studies. The proposed approach was tested for Sitna and Miletin river, two main tributaries of Jijia river.","PeriodicalId":297141,"journal":{"name":"2014 IEEE International Conference on Automation, Quality and Testing, Robotics","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122949161","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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