Pub Date : 1998-08-31DOI: 10.1109/IECON.1998.723960
Y. Dohi, W. Takano, T. Horiguchi, H. Murakoshi
When a large Petri net system is implemented, several LSI Petri net controllers are used and connected in order to build a whole system. For this purpose, the authors propose a new Petri net controller, which can hold much more places than the one proposed before. It also has the new control of tokens for kill-arc and shared-places among sub Petri nets are also proposed. Four accessible registers of tokens makes it possible to access four tokens at the same time, so one can use place-numbers instead of bit-patterns of places as used by the previous controller. This reduces the memory to log n/n of the previous. The new control of tokens makes it easy to keep consistency of tokens among a group of sub Petri net controllers. One can implement LSI Petri net controllers for several time larger Petri nets than previous ones and it is as fast as previous controllers.
{"title":"New Petri net controller for distributed Petri net","authors":"Y. Dohi, W. Takano, T. Horiguchi, H. Murakoshi","doi":"10.1109/IECON.1998.723960","DOIUrl":"https://doi.org/10.1109/IECON.1998.723960","url":null,"abstract":"When a large Petri net system is implemented, several LSI Petri net controllers are used and connected in order to build a whole system. For this purpose, the authors propose a new Petri net controller, which can hold much more places than the one proposed before. It also has the new control of tokens for kill-arc and shared-places among sub Petri nets are also proposed. Four accessible registers of tokens makes it possible to access four tokens at the same time, so one can use place-numbers instead of bit-patterns of places as used by the previous controller. This reduces the memory to log n/n of the previous. The new control of tokens makes it easy to keep consistency of tokens among a group of sub Petri net controllers. One can implement LSI Petri net controllers for several time larger Petri nets than previous ones and it is as fast as previous controllers.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124097649","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 : 1998-08-31DOI: 10.1109/IECON.1998.724138
P.J.R. de Oliveira, P. F. Seixas, L. A. Aguirre, Z. Peixoto
This work describes a method for estimating all electrical parameters of an induction cage motor using a continuous time model and a standard recursive least square algorithm. The problem of derivative calculation of voltage and currents signals, inherent to continuous time models, is solved by polynomial interpolation. This simple yet effective methodology is applied to known speed operation, when the transient response of the motor excited by a PWM inverter is used during the estimation. Experimental results are included and confirm the good performance of the proposed procedure.
{"title":"Parameter estimation of a induction machine using a continuous time model","authors":"P.J.R. de Oliveira, P. F. Seixas, L. A. Aguirre, Z. Peixoto","doi":"10.1109/IECON.1998.724138","DOIUrl":"https://doi.org/10.1109/IECON.1998.724138","url":null,"abstract":"This work describes a method for estimating all electrical parameters of an induction cage motor using a continuous time model and a standard recursive least square algorithm. The problem of derivative calculation of voltage and currents signals, inherent to continuous time models, is solved by polynomial interpolation. This simple yet effective methodology is applied to known speed operation, when the transient response of the motor excited by a PWM inverter is used during the estimation. Experimental results are included and confirm the good performance of the proposed procedure.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126366366","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 : 1998-08-31DOI: 10.1109/IECON.1998.724208
J. M. Moreno-Eguilaz, J. Peracaula
Efficient variable-speed drives are becoming more and more common in today's industry. With increasing harmonic pollution in the power system, real-time monitoring and analysis of harmonic variation have become important. To evaluate power quantities, it is necessary to consider the presence of harmonics because the drive is fed by a power electronics converter. In this paper, a fully digital algorithm to measure and evaluate main power definitions (active power, fundamental reactive power, fundamental apparent power, apparent power, nonfundamental apparent power, total power factor, displacement power factor, intensity total harmonic distortion, etc.) is presented and applied to an efficient variable-speed vector-controlled 1.5 kW induction motor drive. The system is useful to evaluate efficiency and harmonic pollution at different speed and load conditions. Besides, it allows other power quantities to be used as control variables in the efficiency controller.
{"title":"Real-time power measuring and monitoring for an efficient vector-controlled induction motor drive","authors":"J. M. Moreno-Eguilaz, J. Peracaula","doi":"10.1109/IECON.1998.724208","DOIUrl":"https://doi.org/10.1109/IECON.1998.724208","url":null,"abstract":"Efficient variable-speed drives are becoming more and more common in today's industry. With increasing harmonic pollution in the power system, real-time monitoring and analysis of harmonic variation have become important. To evaluate power quantities, it is necessary to consider the presence of harmonics because the drive is fed by a power electronics converter. In this paper, a fully digital algorithm to measure and evaluate main power definitions (active power, fundamental reactive power, fundamental apparent power, apparent power, nonfundamental apparent power, total power factor, displacement power factor, intensity total harmonic distortion, etc.) is presented and applied to an efficient variable-speed vector-controlled 1.5 kW induction motor drive. The system is useful to evaluate efficiency and harmonic pollution at different speed and load conditions. Besides, it allows other power quantities to be used as control variables in the efficiency controller.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126477438","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 : 1998-08-31DOI: 10.1109/IECON.1998.722931
G. Bemardy, B. Scherff
A number of production processes are characterised by having a large number of differing, but interdependent process sections and many complex influential factors. Despite great efforts in process control, fluctuations in the raw material properties often result in inconsistent qualities in the product because the raw material properties often cannot be measured online. Such quality inconsistencies are not detected during production and can only be determined on a random sample much later by laboratory testing. This paper attempts to show that modelling of such a production process and the prediction of quality properties result in reliable online quality control, model-based process optimisation and leads to model-based predictive process control (MPC) as a master control system. Using modern computing technology (SPOC Statistical Process Optimisation and Control) based on the relevant process parameters, statistical methods are able to precisely calculate online most of the quality properties. Optimisation methods calculate model-based production settings to meet quality optimally with respect to costs. Process adjustment using a model-based predictive feedback control is discussed. Highly promising results have been achieved, for example, in particleboard and fibreboard production processes. The results are transferable to other processes with similar characteristics (e.g., oil refinery or sugar production).
{"title":"SPOC-process modelling provides on-line quality control and predictive process control in particle and fibreboard production","authors":"G. Bemardy, B. Scherff","doi":"10.1109/IECON.1998.722931","DOIUrl":"https://doi.org/10.1109/IECON.1998.722931","url":null,"abstract":"A number of production processes are characterised by having a large number of differing, but interdependent process sections and many complex influential factors. Despite great efforts in process control, fluctuations in the raw material properties often result in inconsistent qualities in the product because the raw material properties often cannot be measured online. Such quality inconsistencies are not detected during production and can only be determined on a random sample much later by laboratory testing. This paper attempts to show that modelling of such a production process and the prediction of quality properties result in reliable online quality control, model-based process optimisation and leads to model-based predictive process control (MPC) as a master control system. Using modern computing technology (SPOC Statistical Process Optimisation and Control) based on the relevant process parameters, statistical methods are able to precisely calculate online most of the quality properties. Optimisation methods calculate model-based production settings to meet quality optimally with respect to costs. Process adjustment using a model-based predictive feedback control is discussed. Highly promising results have been achieved, for example, in particleboard and fibreboard production processes. The results are transferable to other processes with similar characteristics (e.g., oil refinery or sugar production).","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125630794","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 : 1998-08-31DOI: 10.1109/IECON.1998.722856
R. Suzuki, N. Kobayashi, M. Kawashima, M. Fujita
In this paper, a decoupling control for a nonminimum phase system is considered from a limiting form of a linear optimal regulator problem point of view. It is shown that an explicit relationship between the limiting properties by letting the weighting matrix of the output vector tend to infinity and a decoupling control. It also gives an experimental application to a robot manipulator to illustrate effectiveness on decoupling control with the limiting properties.
{"title":"/spl Hscr//sub 2/ decoupling control and its application with limiting properties to robot manipulator","authors":"R. Suzuki, N. Kobayashi, M. Kawashima, M. Fujita","doi":"10.1109/IECON.1998.722856","DOIUrl":"https://doi.org/10.1109/IECON.1998.722856","url":null,"abstract":"In this paper, a decoupling control for a nonminimum phase system is considered from a limiting form of a linear optimal regulator problem point of view. It is shown that an explicit relationship between the limiting properties by letting the weighting matrix of the output vector tend to infinity and a decoupling control. It also gives an experimental application to a robot manipulator to illustrate effectiveness on decoupling control with the limiting properties.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125728976","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 : 1998-08-31DOI: 10.1109/IECON.1998.724087
H. Baumann, P. Heinemeyer, W. Staiger, M. Topfer, K. Unger, D. Muller
The straightforward air cooling of semiconductor devices has gradually been replaced by methods using liquid coolants, especially water cooling. In the work described, more efficient cooling devices than those already existing for hockey-puck and module type semiconductors are suggested. An existing heat sink made of aluminium nitride for the water-cooling of hockey-puck type semiconductors has been used as a basis for the development of high performance heat sinks for increased heat flux densities. By means of thermal and fluid dynamics simulation tools, the internal geometry has been optimized with regard to improved heat transfer and reduced pressure drop. The simulation results have been confirmed by a number of experiments using various measuring techniques. As an alternative cooling method for semiconductor modules, a modified baseplate comprising a number of fins for direct water cooling has been suggested. For an intelligent temperature management, control algorithms have been developed resulting in a prototype ASIC which has been implemented for testing purposes.
{"title":"Optimized cooling systems for semiconductor devices","authors":"H. Baumann, P. Heinemeyer, W. Staiger, M. Topfer, K. Unger, D. Muller","doi":"10.1109/IECON.1998.724087","DOIUrl":"https://doi.org/10.1109/IECON.1998.724087","url":null,"abstract":"The straightforward air cooling of semiconductor devices has gradually been replaced by methods using liquid coolants, especially water cooling. In the work described, more efficient cooling devices than those already existing for hockey-puck and module type semiconductors are suggested. An existing heat sink made of aluminium nitride for the water-cooling of hockey-puck type semiconductors has been used as a basis for the development of high performance heat sinks for increased heat flux densities. By means of thermal and fluid dynamics simulation tools, the internal geometry has been optimized with regard to improved heat transfer and reduced pressure drop. The simulation results have been confirmed by a number of experiments using various measuring techniques. As an alternative cooling method for semiconductor modules, a modified baseplate comprising a number of fins for direct water cooling has been suggested. For an intelligent temperature management, control algorithms have been developed resulting in a prototype ASIC which has been implemented for testing purposes.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125800841","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 : 1998-08-31DOI: 10.1109/IECON.1998.724067
K. Verbarg
We present an approach to tackle general motion planning problems in high dimensional configuration spaces. The position of a robot in a workspace can be uniquely described by a configuration vector. This vector for example encodes the angles between consecutive links of a robot manipulator, the length of this vector is the number of degrees of freedom (dof) of the robot and the dimension of the configuration space. For a scene of obstacles in the workspace the motion planning problem aims to find a collision-free motion between two given configurations of the robot. The running time of all exact algorithms is exponential in the number f of degrees of freedom in the worst case. This is due to the fact that the complexity of free space can be /spl Omega/(n/sup f/), where n is the number of constraints. Obviously these approaches are not well suited for practical applications, where f is usually larger than three. Here, we put forward the claim that in practical situations it may not be necessary to compute an optimal path. We develop a new heuristic taking advantage of the "sparsity" of the obstacles, which means that the clearance of the motion we are seeking is large. We focus especially on welding robots to argue that our assumptions are practical. Our algorithm is based on the A*-algorithm and pure clearance computations in the work space. Our algorithm has been implemented in its general form to verify and test its performance, that means there are no restrictions of the dimension, the type of the robot etc. The efficiency of our method is confirmed by experiments in simulated environments.
{"title":"Motion-planning for welding robots","authors":"K. Verbarg","doi":"10.1109/IECON.1998.724067","DOIUrl":"https://doi.org/10.1109/IECON.1998.724067","url":null,"abstract":"We present an approach to tackle general motion planning problems in high dimensional configuration spaces. The position of a robot in a workspace can be uniquely described by a configuration vector. This vector for example encodes the angles between consecutive links of a robot manipulator, the length of this vector is the number of degrees of freedom (dof) of the robot and the dimension of the configuration space. For a scene of obstacles in the workspace the motion planning problem aims to find a collision-free motion between two given configurations of the robot. The running time of all exact algorithms is exponential in the number f of degrees of freedom in the worst case. This is due to the fact that the complexity of free space can be /spl Omega/(n/sup f/), where n is the number of constraints. Obviously these approaches are not well suited for practical applications, where f is usually larger than three. Here, we put forward the claim that in practical situations it may not be necessary to compute an optimal path. We develop a new heuristic taking advantage of the \"sparsity\" of the obstacles, which means that the clearance of the motion we are seeking is large. We focus especially on welding robots to argue that our assumptions are practical. Our algorithm is based on the A*-algorithm and pure clearance computations in the work space. Our algorithm has been implemented in its general form to verify and test its performance, that means there are no restrictions of the dimension, the type of the robot etc. The efficiency of our method is confirmed by experiments in simulated environments.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125976770","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 : 1998-08-31DOI: 10.1109/IECON.1998.724301
J. Espinoza, G. Joós, L.A. Cea, L. Salazar
PWM current source rectifiers (PWM-CSRs) are gradually replacing phase-controlled thyristor-based rectifiers as front-end high power supplies. Advantages include reduced line current harmonic distortion and unity power factor operation. Moreover, with the help of regenerative and resonant snubbers, a three-phase six-switches bridge configuration can now control high power levels (1.2 MVA) while operating at switching frequencies up to 1 kHz. In this range of power and switching frequencies, the switching pattern must be carefully chosen since it defines the supply current harmonic distortion which finally restricts the maximum attainable total input power factor. This paper proposes two space vector based modulating techniques for high power/low switching frequency applications (<1 kHz). The developed switching patterns feature similar performance (low harmonic distortion, minimum switching frequency, and instantaneous line current control) to that obtained with optimum off-line pattern generators (such as selective harmonic elimination). Moreover, they add the following features: (a) the selection of the switches to turn-on/off and the calculation of their on/off-times are done by solving linear algebraic equations, (b) there is no need for stored data since calculations can be implemented on-line, (c) the overmodulation region is naturally covered, including six-step operation, and (d) the short circuit pulses are generated automatically and distributed symmetrically through all the power switches, which enables an even sharing of the switching and conduction losses.
{"title":"Space vector modulation techniques for current source rectifiers operating at switching frequencies up to 1 kHz","authors":"J. Espinoza, G. Joós, L.A. Cea, L. Salazar","doi":"10.1109/IECON.1998.724301","DOIUrl":"https://doi.org/10.1109/IECON.1998.724301","url":null,"abstract":"PWM current source rectifiers (PWM-CSRs) are gradually replacing phase-controlled thyristor-based rectifiers as front-end high power supplies. Advantages include reduced line current harmonic distortion and unity power factor operation. Moreover, with the help of regenerative and resonant snubbers, a three-phase six-switches bridge configuration can now control high power levels (1.2 MVA) while operating at switching frequencies up to 1 kHz. In this range of power and switching frequencies, the switching pattern must be carefully chosen since it defines the supply current harmonic distortion which finally restricts the maximum attainable total input power factor. This paper proposes two space vector based modulating techniques for high power/low switching frequency applications (<1 kHz). The developed switching patterns feature similar performance (low harmonic distortion, minimum switching frequency, and instantaneous line current control) to that obtained with optimum off-line pattern generators (such as selective harmonic elimination). Moreover, they add the following features: (a) the selection of the switches to turn-on/off and the calculation of their on/off-times are done by solving linear algebraic equations, (b) there is no need for stored data since calculations can be implemented on-line, (c) the overmodulation region is naturally covered, including six-step operation, and (d) the short circuit pulses are generated automatically and distributed symmetrically through all the power switches, which enables an even sharing of the switching and conduction losses.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126071121","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 : 1998-08-31DOI: 10.1109/IECON.1998.724270
I. Fonseca, J. Dias
This paper addresses the problem of performing navigation with a mobile robot using active vision exploring the image sphere properties in a stereo divergent configuration. The navigational process is supported by the control of the robot's steering and forward movements just using visual information as feedback. The steering control solution is based on the difference between signals of visual motion flow computed in images on different positions of a virtual image sphere. The majority of solutions based on motion flow and proposed until now, were usually very unstable because they normally compute other parameters from the motion flow. In our case the control is based directly on the difference between motion flow signals on different images. Those multiple images are obtained by small mirrors, that simulate cameras positioned in different positions on the image sphere. Another new version for the spherical sensor is under development. The control algorithm described in this work is based on a discrete-event approach to generate a controlling feedback signal for navigation of an autonomous robot with an active vision system as described.
{"title":"Robot navigation using visual information","authors":"I. Fonseca, J. Dias","doi":"10.1109/IECON.1998.724270","DOIUrl":"https://doi.org/10.1109/IECON.1998.724270","url":null,"abstract":"This paper addresses the problem of performing navigation with a mobile robot using active vision exploring the image sphere properties in a stereo divergent configuration. The navigational process is supported by the control of the robot's steering and forward movements just using visual information as feedback. The steering control solution is based on the difference between signals of visual motion flow computed in images on different positions of a virtual image sphere. The majority of solutions based on motion flow and proposed until now, were usually very unstable because they normally compute other parameters from the motion flow. In our case the control is based directly on the difference between motion flow signals on different images. Those multiple images are obtained by small mirrors, that simulate cameras positioned in different positions on the image sphere. Another new version for the spherical sensor is under development. The control algorithm described in this work is based on a discrete-event approach to generate a controlling feedback signal for navigation of an autonomous robot with an active vision system as described.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128184505","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 : 1998-08-31DOI: 10.1109/IECON.1998.723934
J. Silva Neto, H. Le-Huy
In this paper, the authors describe an improved fuzzy adaptation method to construct or change the knowledge base in the fuzzy logic controller (FLC). The objective of the fuzzy logic adaptation mechanism (FLAM) is to change the rules definition in the FLC rule base table, according to the comparison between a reference model output signal and the system output. The FLAM is composed by a fuzzy inverse model and a knowledge base modifier. The learning algorithm has a local effect but differently from previous fuzzy strategies it uses a weighting factor for each active rule, to avoid unnecessary control signal switching. They show the efficiency of this method in a TMS320C30 DSP-based speed fuzzy control scheme of a permanent magnet synchronous motor (PMSM). The fuzzy logic adaptive strategy can be easily implemented. It has fast learning features and very good tracking characteristics even under severe variations of the system parameters, due to the improved algorithm.
{"title":"An improved fuzzy learning algorithm for motion control applications [PM synchronous motors]","authors":"J. Silva Neto, H. Le-Huy","doi":"10.1109/IECON.1998.723934","DOIUrl":"https://doi.org/10.1109/IECON.1998.723934","url":null,"abstract":"In this paper, the authors describe an improved fuzzy adaptation method to construct or change the knowledge base in the fuzzy logic controller (FLC). The objective of the fuzzy logic adaptation mechanism (FLAM) is to change the rules definition in the FLC rule base table, according to the comparison between a reference model output signal and the system output. The FLAM is composed by a fuzzy inverse model and a knowledge base modifier. The learning algorithm has a local effect but differently from previous fuzzy strategies it uses a weighting factor for each active rule, to avoid unnecessary control signal switching. They show the efficiency of this method in a TMS320C30 DSP-based speed fuzzy control scheme of a permanent magnet synchronous motor (PMSM). The fuzzy logic adaptive strategy can be easily implemented. It has fast learning features and very good tracking characteristics even under severe variations of the system parameters, due to the improved algorithm.","PeriodicalId":377136,"journal":{"name":"IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121594892","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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