Pub Date : 1997-11-09DOI: 10.1109/IECON.1997.668467
L. Horváth, I. Rudas, J. Bencze
This paper presents a methodology for modeling of manufacturing processes of mechanical parts. The demand for integration of manufacturing process model into product model is taken into account. In this important field of application, a need has been emerged for description of all process variants in a single model and for generic model descriptions for a cluster of manufacturing tasks. The authors have developed a four levelled generic process model. Entities of this model are easy to understand for production engineers that are represented by Petri net. In the paper, first the importance of the manufacturing process model and its interconnections with other product related models are emphasized. Following this, the manufacturing process model is described and the method of its application is outlined. Next, creating and evaluation of the model are explained. Finally, features of the model and the modeling activity are concluded.
{"title":"Petri net modeling of manufacturing processes for CAD/CAM and FMS applications","authors":"L. Horváth, I. Rudas, J. Bencze","doi":"10.1109/IECON.1997.668467","DOIUrl":"https://doi.org/10.1109/IECON.1997.668467","url":null,"abstract":"This paper presents a methodology for modeling of manufacturing processes of mechanical parts. The demand for integration of manufacturing process model into product model is taken into account. In this important field of application, a need has been emerged for description of all process variants in a single model and for generic model descriptions for a cluster of manufacturing tasks. The authors have developed a four levelled generic process model. Entities of this model are easy to understand for production engineers that are represented by Petri net. In the paper, first the importance of the manufacturing process model and its interconnections with other product related models are emphasized. Following this, the manufacturing process model is described and the method of its application is outlined. Next, creating and evaluation of the model are explained. Finally, features of the model and the modeling activity are concluded.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115501296","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 : 1997-11-09DOI: 10.1109/IECON.1997.670904
K. Yamada, S. Komada, M. Ishida, T. Hori
In earlier papers, it has been reported that a fast and precise servo system, which has low-sensitivity to parameter variation and disturbance, can be realized with simple structure by using a high order disturbance observer. However, a clear and simple design method satisfying specifications for robust stability, influence of measurement noise, and relative stability has hardly been proposed. In this paper, we clarify the class of the robust servo system realized by adjusting the order of the disturbance observer and show design of an estimated disturbance feedback by the disturbance observer, which can represent a classical control approach. We apply this strategy to a design of a position servo system and realize the high performance robust servo system using the high order disturbance observer.
{"title":"Analysis and classical control design of servo system using high order disturbance observer","authors":"K. Yamada, S. Komada, M. Ishida, T. Hori","doi":"10.1109/IECON.1997.670904","DOIUrl":"https://doi.org/10.1109/IECON.1997.670904","url":null,"abstract":"In earlier papers, it has been reported that a fast and precise servo system, which has low-sensitivity to parameter variation and disturbance, can be realized with simple structure by using a high order disturbance observer. However, a clear and simple design method satisfying specifications for robust stability, influence of measurement noise, and relative stability has hardly been proposed. In this paper, we clarify the class of the robust servo system realized by adjusting the order of the disturbance observer and show design of an estimated disturbance feedback by the disturbance observer, which can represent a classical control approach. We apply this strategy to a design of a position servo system and realize the high performance robust servo system using the high order disturbance observer.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114149334","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 : 1997-11-09DOI: 10.1109/IECON.1997.671041
K. Shyu, H. Shieh
In this paper, the nonlinear sliding-mode control combining binary control approach for an input-output linearization based induction motor model is proposed to design the robust torque and flux controllers. With the proposed control, we can obtain the advantages of that: (1) the generated torque of the induction motor presents a completely linear variable, (2) the rotor flux amplitude can be accurately controlled, (3) the transient performance is substantially improved, and (4) the robustness with respect to matched and mismatched uncertainties is provided.
{"title":"Robust nonlinear torque control for induction motor drive","authors":"K. Shyu, H. Shieh","doi":"10.1109/IECON.1997.671041","DOIUrl":"https://doi.org/10.1109/IECON.1997.671041","url":null,"abstract":"In this paper, the nonlinear sliding-mode control combining binary control approach for an input-output linearization based induction motor model is proposed to design the robust torque and flux controllers. With the proposed control, we can obtain the advantages of that: (1) the generated torque of the induction motor presents a completely linear variable, (2) the rotor flux amplitude can be accurately controlled, (3) the transient performance is substantially improved, and (4) the robustness with respect to matched and mismatched uncertainties is provided.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114698149","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 : 1997-11-09DOI: 10.1109/IECON.1997.671825
Shu Lu, C.E. Lin, C. Huang
Harmonic losses are a common problem in the harmonic research area. A 12-pulse AC-DC power converter is the most widely topology used in different heavy industrial loads because the 5th, 7th, etc. harmonic currents will disappear in the primary side of the power converter transformer under ideal operation conditions. Simultaneously, other terms are produced from the power converter through its transformer, and injected into the distribution system. However no exact analytical method has been proposed to analyze such effects via the new real power definition in the literature. Therefore, in this paper, the authors propose an effective method to solve the above problem. Via the proposed method and statistical theory, a 12-pulse MVA-rating power converter load in a heavy chemical industry is presented to analyze and estimate harmonic losses. These results of harmonic losses can provide available data to enable power engineers to understand power losses and the characteristics of demand-side loads.
{"title":"Injected harmonic losses analysis and estimation due to a 12-pulse AC-DC converter load","authors":"Shu Lu, C.E. Lin, C. Huang","doi":"10.1109/IECON.1997.671825","DOIUrl":"https://doi.org/10.1109/IECON.1997.671825","url":null,"abstract":"Harmonic losses are a common problem in the harmonic research area. A 12-pulse AC-DC power converter is the most widely topology used in different heavy industrial loads because the 5th, 7th, etc. harmonic currents will disappear in the primary side of the power converter transformer under ideal operation conditions. Simultaneously, other terms are produced from the power converter through its transformer, and injected into the distribution system. However no exact analytical method has been proposed to analyze such effects via the new real power definition in the literature. Therefore, in this paper, the authors propose an effective method to solve the above problem. Via the proposed method and statistical theory, a 12-pulse MVA-rating power converter load in a heavy chemical industry is presented to analyze and estimate harmonic losses. These results of harmonic losses can provide available data to enable power engineers to understand power losses and the characteristics of demand-side loads.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115753134","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 : 1997-11-09DOI: 10.1109/IECON.1997.672028
D. Simonetti, E. Pascual, J. Sebastián, J. Uceda
An improved small-signal model for a discontinuous conduction mode (DCM) single-phase boost power factor preregulator (PFP) is presented. The model is derived using an approximation for the average current equation injected into the output of the power converter. After making small-signal perturbations, both control-to-output voltage and input voltage-to-output voltage transfer functions are obtained. Open and closed-loop experimental results validate the analysis.
{"title":"A representative small-signal model for the single-phase discontinuous boost PFP [power factor preregulator]","authors":"D. Simonetti, E. Pascual, J. Sebastián, J. Uceda","doi":"10.1109/IECON.1997.672028","DOIUrl":"https://doi.org/10.1109/IECON.1997.672028","url":null,"abstract":"An improved small-signal model for a discontinuous conduction mode (DCM) single-phase boost power factor preregulator (PFP) is presented. The model is derived using an approximation for the average current equation injected into the output of the power converter. After making small-signal perturbations, both control-to-output voltage and input voltage-to-output voltage transfer functions are obtained. Open and closed-loop experimental results validate the analysis.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116036769","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 : 1997-11-09DOI: 10.1109/IECON.1997.671079
M. Kaneko, T. Ishikawa, Y. Sogawa
There are two algorithms in the conventional elevator group control system: the minimum long-wait algorithm and the area-based control algorithm. These algorithms are designed to reduce service time (waiting time+riding time) by decreasing waiting time. This article proposes a new elevator group control system which addresses riding time as well as waiting time. This algorithm is denoted, "total fuzzy control system". Effectiveness of the total fuzzy control systems is thoroughly studied by computer simulation and the results show a better performance in wider traffic condition.
{"title":"Supervisory control for elevator group by using fuzzy expert system","authors":"M. Kaneko, T. Ishikawa, Y. Sogawa","doi":"10.1109/IECON.1997.671079","DOIUrl":"https://doi.org/10.1109/IECON.1997.671079","url":null,"abstract":"There are two algorithms in the conventional elevator group control system: the minimum long-wait algorithm and the area-based control algorithm. These algorithms are designed to reduce service time (waiting time+riding time) by decreasing waiting time. This article proposes a new elevator group control system which addresses riding time as well as waiting time. This algorithm is denoted, \"total fuzzy control system\". Effectiveness of the total fuzzy control systems is thoroughly studied by computer simulation and the results show a better performance in wider traffic condition.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"395 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115313010","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 : 1997-11-09DOI: 10.1109/IECON.1997.672010
Gi-Taek Kim, T. Lipo
Three-phase to three-phase VSI-PWM rectifier and inverter systems with eight switches have many advantages: capability of unity or even leading power factor; sinusoidal input current waveforms; bidirectional power flow etc. This paper derives a mathematical model of the DC link voltage control for such a system. The transient model for overall and difference voltages of split capacitor DC link is developed, and typical simulated and experimental results for dynamic responses are presented to illustrate important performance characteristics to verify the developed model.
{"title":"DC link voltage control of reduced switch VSI-PWM rectifier/inverter system","authors":"Gi-Taek Kim, T. Lipo","doi":"10.1109/IECON.1997.672010","DOIUrl":"https://doi.org/10.1109/IECON.1997.672010","url":null,"abstract":"Three-phase to three-phase VSI-PWM rectifier and inverter systems with eight switches have many advantages: capability of unity or even leading power factor; sinusoidal input current waveforms; bidirectional power flow etc. This paper derives a mathematical model of the DC link voltage control for such a system. The transient model for overall and difference voltages of split capacitor DC link is developed, and typical simulated and experimental results for dynamic responses are presented to illustrate important performance characteristics to verify the developed model.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123396493","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 : 1997-11-09DOI: 10.1109/IECON.1997.668457
B. Maaref, S. Nasri
The performance and the architecture of the network that interconnects the diverse functions of computer integrated manufacturing (CIM) are of much importance. Indeed, the majority of these functions have critical-time constraints that must be considered when designing this network. In this paper, an architecture based on the OSI reference model is presented with elements of services and protocols which match the requirements for these constraints. The authors discuss the implementation of their architecture and evaluate the performance of this implementation. Finally, they compare the performance improvement with the existing implementation.
{"title":"ATM for real-time manufacturing system architectures","authors":"B. Maaref, S. Nasri","doi":"10.1109/IECON.1997.668457","DOIUrl":"https://doi.org/10.1109/IECON.1997.668457","url":null,"abstract":"The performance and the architecture of the network that interconnects the diverse functions of computer integrated manufacturing (CIM) are of much importance. Indeed, the majority of these functions have critical-time constraints that must be considered when designing this network. In this paper, an architecture based on the OSI reference model is presented with elements of services and protocols which match the requirements for these constraints. The authors discuss the implementation of their architecture and evaluate the performance of this implementation. Finally, they compare the performance improvement with the existing implementation.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124894709","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 : 1997-11-09DOI: 10.1109/IECON.1997.668438
K. Vieira, Bogdan M. Wilamowski, R. Kubichek
This paper investigates automatic speaker recognition systems, which can be used for security purposes. The speech signal is compressed using linear prediction analysis and recognized by neural networks. This neural network technique is presented for the task of speech recognition and speaker verification. This technique first uses pattern recognition to identify the speech, then it is used to distinguish each user from all other speakers (impostors). With this method, unknown speech can be accurately classified as user or impostor speech. The approach used is based on the following steps: extraction of spectral features; training of an initial neural network to identify the speech; extraction of LPC-reflection coefficients for each user, training of a secondary neural-network to identify the user; and classification of unknown speech as either user or impostor.
{"title":"Speaker verification for security systems using artificial neural networks","authors":"K. Vieira, Bogdan M. Wilamowski, R. Kubichek","doi":"10.1109/IECON.1997.668438","DOIUrl":"https://doi.org/10.1109/IECON.1997.668438","url":null,"abstract":"This paper investigates automatic speaker recognition systems, which can be used for security purposes. The speech signal is compressed using linear prediction analysis and recognized by neural networks. This neural network technique is presented for the task of speech recognition and speaker verification. This technique first uses pattern recognition to identify the speech, then it is used to distinguish each user from all other speakers (impostors). With this method, unknown speech can be accurately classified as user or impostor speech. The approach used is based on the following steps: extraction of spectral features; training of an initial neural network to identify the speech; extraction of LPC-reflection coefficients for each user, training of a secondary neural-network to identify the user; and classification of unknown speech as either user or impostor.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121990787","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 : 1997-11-09DOI: 10.1109/IECON.1997.670906
T. Martin, B. Carr
Disturbance accommodation control (DAC) is a method of control which allows for the reduction of the adverse effects of the external disturbances acting on the linear and some nonlinear systems (and in some cases complete absorption of the disturbance effects). For this control scheme to work, the disturbances must be of known waveform type, such as a step function, ramp function, sinusoidal function, etc. The basic idea of DAC is to model the disturbance, augment its state equations to the system state equations, and then reconstruct the states of this augmented system for use in a controller that minimizes the effects of the disturbance. Disturbance accommodation control is applied to reduce the adverse effects of step, ramp, and sinusoidal disturbances acting on a servo system.
{"title":"Disturbance reduction in servo systems","authors":"T. Martin, B. Carr","doi":"10.1109/IECON.1997.670906","DOIUrl":"https://doi.org/10.1109/IECON.1997.670906","url":null,"abstract":"Disturbance accommodation control (DAC) is a method of control which allows for the reduction of the adverse effects of the external disturbances acting on the linear and some nonlinear systems (and in some cases complete absorption of the disturbance effects). For this control scheme to work, the disturbances must be of known waveform type, such as a step function, ramp function, sinusoidal function, etc. The basic idea of DAC is to model the disturbance, augment its state equations to the system state equations, and then reconstruct the states of this augmented system for use in a controller that minimizes the effects of the disturbance. Disturbance accommodation control is applied to reduce the adverse effects of step, ramp, and sinusoidal disturbances acting on a servo system.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121993001","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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