Pub Date : 1997-11-09DOI: 10.1109/IECON.1997.671051
K. Suyama
The objective of this paper is to propose a new type reliable sampled-data control system against sensor failures using decision by majority among redundant sensors. It is a practical way of solving questions of the conventional reliable control theory without loss of its advantages.
{"title":"Reliable sampled-data control systems using decision by majority","authors":"K. Suyama","doi":"10.1109/IECON.1997.671051","DOIUrl":"https://doi.org/10.1109/IECON.1997.671051","url":null,"abstract":"The objective of this paper is to propose a new type reliable sampled-data control system against sensor failures using decision by majority among redundant sensors. It is a practical way of solving questions of the conventional reliable control theory without loss of its advantages.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"89 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":"124247314","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.1997.671806
Jian Sun, R. Bass
Conventional averaged models of switching power converters are useful for control loop design, but are inadequate for the main circuit design because of their inability to predict waveform details. A systematic method for recovering ripple components from the averaged model is presented in this paper. The method has been implemented in a symbolic analysis program package which allows automatic ripple analysis in conjunction with averaged modeling. Applications of the method and the package are demonstrated using a PWM DC/DC power converter and a line-frequency AC/DC power converter.
{"title":"Automated ripple analysis using KBM method [switching power convertor harmonics]","authors":"Jian Sun, R. Bass","doi":"10.1109/IECON.1997.671806","DOIUrl":"https://doi.org/10.1109/IECON.1997.671806","url":null,"abstract":"Conventional averaged models of switching power converters are useful for control loop design, but are inadequate for the main circuit design because of their inability to predict waveform details. A systematic method for recovering ripple components from the averaged model is presented in this paper. The method has been implemented in a symbolic analysis program package which allows automatic ripple analysis in conjunction with averaged modeling. Applications of the method and the package are demonstrated using a PWM DC/DC power converter and a line-frequency AC/DC power converter.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"115 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":"124578708","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.1997.668470
P. Marino, M. Domínguez
The authors have been involved in the implementation of a total quality control project in communications equipment company, whose products are mounted and tested in a manufacturing plant controlled by an IBM Token Ring LAN. The most significant products are RF and microwave amplifier boards for satellite TV receivers, with electronic components based on SMT technology. The first implementation of total quality control project was an ATE (automatic test equipment) LAN node that runs a program of verification for single-channel and multichannel electronic amplifiers, in which bandwidth is in the TV spectrum (50+850 MHz). This ATE LAN node is supported in its performance for an RF analyzer connected to it through an IEEE 388 bus. The last implementation is an automated inspection LAN node to detect the missing of SMT and non SMT components mounted in the electronic cards of above mentioned amplifiers. This LAN node for automated inspection is based on artificial vision and will be called MVI (Machine-Vision Inspection).
{"title":"On-line automated inspection based on image digitization boards","authors":"P. Marino, M. Domínguez","doi":"10.1109/IECON.1997.668470","DOIUrl":"https://doi.org/10.1109/IECON.1997.668470","url":null,"abstract":"The authors have been involved in the implementation of a total quality control project in communications equipment company, whose products are mounted and tested in a manufacturing plant controlled by an IBM Token Ring LAN. The most significant products are RF and microwave amplifier boards for satellite TV receivers, with electronic components based on SMT technology. The first implementation of total quality control project was an ATE (automatic test equipment) LAN node that runs a program of verification for single-channel and multichannel electronic amplifiers, in which bandwidth is in the TV spectrum (50+850 MHz). This ATE LAN node is supported in its performance for an RF analyzer connected to it through an IEEE 388 bus. The last implementation is an automated inspection LAN node to detect the missing of SMT and non SMT components mounted in the electronic cards of above mentioned amplifiers. This LAN node for automated inspection is based on artificial vision and will be called MVI (Machine-Vision Inspection).","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"16 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":"134180658","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.1997.668494
P. Drews, P. Fromm
For the operation of mobile robots, the design of the man-machine interface has a major impact on the acceptance by the user. This is especially valid when dealing with users of minor or no training, which can be found in almost any application area, ranging from transport or construction tasks to assistive technology for elderly and disabled. The following essay introduces a natural language processing software which transforms a natural language sentence into a series of commands for a mobile service robot. Both the language processor and the command set of the controller may be modified by the user to adapt it to different application areas. The language processor is based on a modified finite state transducer network. The grammar/word pattern extracted by the network is processed by a transformation module which converts the contained information into the controller command. A context memory and a question generator allow the processing of incomplete instructions and command modifications. A prototype application is presented which allows severely disabled persons bound to a wheelchair to control the chair and their home environment by natural language.
{"title":"A natural language processing approach for mobile service robot control","authors":"P. Drews, P. Fromm","doi":"10.1109/IECON.1997.668494","DOIUrl":"https://doi.org/10.1109/IECON.1997.668494","url":null,"abstract":"For the operation of mobile robots, the design of the man-machine interface has a major impact on the acceptance by the user. This is especially valid when dealing with users of minor or no training, which can be found in almost any application area, ranging from transport or construction tasks to assistive technology for elderly and disabled. The following essay introduces a natural language processing software which transforms a natural language sentence into a series of commands for a mobile service robot. Both the language processor and the command set of the controller may be modified by the user to adapt it to different application areas. The language processor is based on a modified finite state transducer network. The grammar/word pattern extracted by the network is processed by a transformation module which converts the contained information into the controller command. A context memory and a question generator allow the processing of incomplete instructions and command modifications. A prototype application is presented which allows severely disabled persons bound to a wheelchair to control the chair and their home environment by natural language.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"17 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":"134295539","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.1997.671050
T. Roppel, K. Dunman, M. Padgett, D. Wilson, T. Lindblad
A recurrent back-propagation neural algorithm is trained to classify nine odors. The algorithm is capable of correctly identifying the odors regardless of the time sequence of presentation. The classification is performed in near-real time and is based upon the transient response of an array of 15 tin-oxide gas sensors.
{"title":"Feature-level signal processing for odor sensor arrays","authors":"T. Roppel, K. Dunman, M. Padgett, D. Wilson, T. Lindblad","doi":"10.1109/IECON.1997.671050","DOIUrl":"https://doi.org/10.1109/IECON.1997.671050","url":null,"abstract":"A recurrent back-propagation neural algorithm is trained to classify nine odors. The algorithm is capable of correctly identifying the odors regardless of the time sequence of presentation. The classification is performed in near-real time and is based upon the transient response of an array of 15 tin-oxide gas sensors.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"51 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":"133808694","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.1997.671069
S. Beineke, F. Schutte, H. Grotstollen
For high performance speed and position control of electrical drives, fast online identification is needed for time-varying inertia or load conditions in combination with adaptive controllers. In this paper extended Kalman filters are applied and optimized for deterministic parameter variations by integrating basis function networks into the common structure of the Kalman filter. It is shown that learning of nonlinear load or parameter characteristics becomes feasible by this measure and the performance of the extended Kalman filter can be improved.
{"title":"Online identification of nonlinear mechanics using extended Kalman filters with basis function networks","authors":"S. Beineke, F. Schutte, H. Grotstollen","doi":"10.1109/IECON.1997.671069","DOIUrl":"https://doi.org/10.1109/IECON.1997.671069","url":null,"abstract":"For high performance speed and position control of electrical drives, fast online identification is needed for time-varying inertia or load conditions in combination with adaptive controllers. In this paper extended Kalman filters are applied and optimized for deterministic parameter variations by integrating basis function networks into the common structure of the Kalman filter. It is shown that learning of nonlinear load or parameter characteristics becomes feasible by this measure and the performance of the extended Kalman filter can be improved.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"6 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":"133763545","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.1997.671033
J. Zhao, M. Kamper, F. van der Merwe
In this paper a simple on-line control method is proposed to reduce torque ripple and resonance mechanical vibration due to amongst others the slot harmonic torques of the reluctance synchronous machine. Different transfer functions of the control system are derived. Hence, by keeping a certain relation between the parameters of the control system, the torque ripple is reduced without affecting the transient speed response of the drive. Digital signal processing technology was adapted for the control system. The proposed control method is verified by simulation and experimental work on an actual reluctance synchronous machine drive.
{"title":"On-line control method to reduce mechanical vibration and torque ripple in reluctance synchronous machine drives","authors":"J. Zhao, M. Kamper, F. van der Merwe","doi":"10.1109/IECON.1997.671033","DOIUrl":"https://doi.org/10.1109/IECON.1997.671033","url":null,"abstract":"In this paper a simple on-line control method is proposed to reduce torque ripple and resonance mechanical vibration due to amongst others the slot harmonic torques of the reluctance synchronous machine. Different transfer functions of the control system are derived. Hence, by keeping a certain relation between the parameters of the control system, the torque ripple is reduced without affecting the transient speed response of the drive. Digital signal processing technology was adapted for the control system. The proposed control method is verified by simulation and experimental work on an actual reluctance synchronous machine drive.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"175 S408","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132906286","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}
Pub Date : 1997-11-09DOI: 10.1109/IECON.1997.664908
G. Buja, D. Casadei, G. Serra
Direct torque control (DTC) is an emerging technique for controlling the PWM inverter-fed induction motor (IM) drives. It allows the precise and quick control of the IM flux and torque without calling for complex control algorithms. In principle, moreover, DTC requires only the knowledge of the stator resistance. The tutorial starts by reviewing the basic operation of an IM and of a PWM inverter using the space vector theory. The field-oriented (FO) control is also reviewed. Then the concept of DTC is illustrated and three DTC-based strategies (i.e. switching table (ST), direct self control (DSC), space vector modulation (SVM)) are described. The ST strategy is dealt with in depth, illustrating by means of experimental data the flux and torque responses generated with different choices of the switching table and the influence of the amplitude of the hysteresis bands of the flux and torque controllers on the drive performance. Furthermore, an improved stator flux estimator is presented which allows the system under to be kept under control even at standstill. Finally the sensitivity of the control system to parameter variations is presented.
{"title":"DTC-based strategies for induction motor drives","authors":"G. Buja, D. Casadei, G. Serra","doi":"10.1109/IECON.1997.664908","DOIUrl":"https://doi.org/10.1109/IECON.1997.664908","url":null,"abstract":"Direct torque control (DTC) is an emerging technique for controlling the PWM inverter-fed induction motor (IM) drives. It allows the precise and quick control of the IM flux and torque without calling for complex control algorithms. In principle, moreover, DTC requires only the knowledge of the stator resistance. The tutorial starts by reviewing the basic operation of an IM and of a PWM inverter using the space vector theory. The field-oriented (FO) control is also reviewed. Then the concept of DTC is illustrated and three DTC-based strategies (i.e. switching table (ST), direct self control (DSC), space vector modulation (SVM)) are described. The ST strategy is dealt with in depth, illustrating by means of experimental data the flux and torque responses generated with different choices of the switching table and the influence of the amplitude of the hysteresis bands of the flux and torque controllers on the drive performance. Furthermore, an improved stator flux estimator is presented which allows the system under to be kept under control even at standstill. Finally the sensitivity of the control system to parameter variations is presented.","PeriodicalId":404447,"journal":{"name":"Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066)","volume":"42 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":"117227182","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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