Pub Date : 1989-11-06DOI: 10.1109/IECON.1989.69629
G. Joós, J. Levasseur
The author proposes and analyzes a digital implementation of parallel control loops in electrical drives that allows fast and accurate switching from one control loop to the other. Problems such as those caused by the presence of ripple and noise on the feedback signals are addressed. Experimental results obtained on a microcontroller-based DC servo-drive indicate the excellent performance achieved with this scheme. Performance comparisons are made with the cascaded loop structure to show the advantages of parallel loops. In the case of DC motor drives, the speed regulator gains for an equivalent performance are smaller than in the cascade structure, making the system more immune to noise.<>
{"title":"Digital implementation of parallel control loops in electric drives","authors":"G. Joós, J. Levasseur","doi":"10.1109/IECON.1989.69629","DOIUrl":"https://doi.org/10.1109/IECON.1989.69629","url":null,"abstract":"The author proposes and analyzes a digital implementation of parallel control loops in electrical drives that allows fast and accurate switching from one control loop to the other. Problems such as those caused by the presence of ripple and noise on the feedback signals are addressed. Experimental results obtained on a microcontroller-based DC servo-drive indicate the excellent performance achieved with this scheme. Performance comparisons are made with the cascaded loop structure to show the advantages of parallel loops. In the case of DC motor drives, the speed regulator gains for an equivalent performance are smaller than in the cascade structure, making the system more immune to noise.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127344011","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 : 1989-11-06DOI: 10.1109/IECON.1989.69709
D. Garcia, M. Tarrío, G. Ojea
The authors present a novel approach to the problem of data logging and online quality control in an electrolytic tin production line. The main functions realized by the system are: tracking (supervision) of the manufacturing process of the coils, simulation of drains in defective coils in order to improve their final quality, and consulting of data from coils previously manufactured. All these functions are realized online concurrently with data capturing. The application is of a low-cost type, running on an IBM-XT compatible computer under the MS-DOS operating system and mainly developed in Pascal. This system was installed in the ENSIDESA-Aviles factory in July 1988, and has performed continuously since then without any problems.<>
{"title":"A new approach to data logging and on-line quality control for an electrolytic tin-plate production line","authors":"D. Garcia, M. Tarrío, G. Ojea","doi":"10.1109/IECON.1989.69709","DOIUrl":"https://doi.org/10.1109/IECON.1989.69709","url":null,"abstract":"The authors present a novel approach to the problem of data logging and online quality control in an electrolytic tin production line. The main functions realized by the system are: tracking (supervision) of the manufacturing process of the coils, simulation of drains in defective coils in order to improve their final quality, and consulting of data from coils previously manufactured. All these functions are realized online concurrently with data capturing. The application is of a low-cost type, running on an IBM-XT compatible computer under the MS-DOS operating system and mainly developed in Pascal. This system was installed in the ENSIDESA-Aviles factory in July 1988, and has performed continuously since then without any problems.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123788746","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 : 1989-11-06DOI: 10.1109/IECON.1989.69681
D. Hanselman
An analysis of the effects of the most common nonideal resolver signal characteristics on the position accuracy achievable using a tracking R/D (resolver-to-digital) converter is conducted. Expressions for position accuracy achievable due to inductive harmonics, inductive DC component feedthrough, quadrature error, amplitude imbalance, and imperfect quadrature component rejection are developed. The difficulty in achieving the high position resolution and accuracy capabilities of a tracking R/D converter is assessed, and several methods for minimizing nonideal resolver signals are discussed. The results of this work establish criteria which can be used in the design of resolvers.<>
{"title":"Resolver signal requirements for high accuracy resolver-to-digital conversion","authors":"D. Hanselman","doi":"10.1109/IECON.1989.69681","DOIUrl":"https://doi.org/10.1109/IECON.1989.69681","url":null,"abstract":"An analysis of the effects of the most common nonideal resolver signal characteristics on the position accuracy achievable using a tracking R/D (resolver-to-digital) converter is conducted. Expressions for position accuracy achievable due to inductive harmonics, inductive DC component feedthrough, quadrature error, amplitude imbalance, and imperfect quadrature component rejection are developed. The difficulty in achieving the high position resolution and accuracy capabilities of a tracking R/D converter is assessed, and several methods for minimizing nonideal resolver signals are discussed. The results of this work establish criteria which can be used in the design of resolvers.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126738960","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 : 1989-11-06DOI: 10.1109/IECON.1989.69718
T. Fukuda, O. Hasegawa
Generally, the conventional pattern matching method is hard to apply to objects which have individually variable sizes, such as ceramic products, because of their expansion, shrinkage, or cracking in the baking process. To solve this problem, especially for automatic manipulation of these kinds of products, the authors propose an expert system. Avoiding individual differences, the system reasons about and recognizes bending, twists, and cracks of an object by integrating image information about six surfaces. The system calculates and reasons about the most suitable grasping point, given the manipulator's working area and the position of the object. When the most suitable grouping point is not in the working area, the grasping planning mode is activated. The effectiveness of this method was confirmed experimentally.<>
{"title":"3-D image processing and grasping planning expert system for distorted objects","authors":"T. Fukuda, O. Hasegawa","doi":"10.1109/IECON.1989.69718","DOIUrl":"https://doi.org/10.1109/IECON.1989.69718","url":null,"abstract":"Generally, the conventional pattern matching method is hard to apply to objects which have individually variable sizes, such as ceramic products, because of their expansion, shrinkage, or cracking in the baking process. To solve this problem, especially for automatic manipulation of these kinds of products, the authors propose an expert system. Avoiding individual differences, the system reasons about and recognizes bending, twists, and cracks of an object by integrating image information about six surfaces. The system calculates and reasons about the most suitable grasping point, given the manipulator's working area and the position of the object. When the most suitable grouping point is not in the working area, the grasping planning mode is activated. The effectiveness of this method was confirmed experimentally.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115332880","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 : 1989-11-06DOI: 10.1109/IECON.1989.69630
M. Farooq, J. Plant, Y. Plourde
The authors present the implementation of a suboptimal speed control algorithm for an SCR-DC motor drive. The algorithm is based on look-up tables that provide steady-state open-loop control. The nominal firing angle correction is based on constraints on the execution time and the maximum average armature current. The performance of the algorithm is compared to that of the two-step look-ahead controller. The algorithm is also verified through bench model testing. The algorithm considerably reduces the number of look-up tables and hence can be implemented on a single off-the-shelf microprocessor instead of two microprocessors in a master-slave configuration.<>
{"title":"A microprocessor-based suboptimal speed controller for an SCR-DC motor drive","authors":"M. Farooq, J. Plant, Y. Plourde","doi":"10.1109/IECON.1989.69630","DOIUrl":"https://doi.org/10.1109/IECON.1989.69630","url":null,"abstract":"The authors present the implementation of a suboptimal speed control algorithm for an SCR-DC motor drive. The algorithm is based on look-up tables that provide steady-state open-loop control. The nominal firing angle correction is based on constraints on the execution time and the maximum average armature current. The performance of the algorithm is compared to that of the two-step look-ahead controller. The algorithm is also verified through bench model testing. The algorithm considerably reduces the number of look-up tables and hence can be implemented on a single off-the-shelf microprocessor instead of two microprocessors in a master-slave configuration.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114589510","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 : 1989-11-06DOI: 10.1109/IECON.1989.69696
R. Luo, R. Scherp
The problem of automatically generating the possible 3-D sensor locations for observing a scene is defined, and an approach to its solution is presented. The approach taken assumes that the sensor characteristics are well understood and that objects expected in the scene are known and modeled. Then, given a set of constraints, a set of actions is specified directing a robot arm to position itself in such a manner that an attached 3-D sensor located in the robot gripper yields the maximum information content with minimum effort with respect to the constraints. Techniques that yield solutions for placement of a triangulation-type 3-D laser range finder are presented.<>
{"title":"Strategies for automated placement of a robot hand-held mobile 3D range sensor","authors":"R. Luo, R. Scherp","doi":"10.1109/IECON.1989.69696","DOIUrl":"https://doi.org/10.1109/IECON.1989.69696","url":null,"abstract":"The problem of automatically generating the possible 3-D sensor locations for observing a scene is defined, and an approach to its solution is presented. The approach taken assumes that the sensor characteristics are well understood and that objects expected in the scene are known and modeled. Then, given a set of constraints, a set of actions is specified directing a robot arm to position itself in such a manner that an attached 3-D sensor located in the robot gripper yields the maximum information content with minimum effort with respect to the constraints. Techniques that yield solutions for placement of a triangulation-type 3-D laser range finder are presented.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128274946","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 : 1989-11-06DOI: 10.1109/IECON.1989.69697
Y. Watanabe
An inspection system based on two-dimensional vision and the algorithms for inspecting various surface mount component defects are discussed. The surface mount postsolder inspection system described detects component polarity, shifted components, missing components, bridges, and the presence/absence of a solder fillet with an accuracy of 99.9%. Insufficient solder on a fillet can be detected with 99.5% accuracy.<>
{"title":"Automated optical inspection of surface mount components using 2D machine vision","authors":"Y. Watanabe","doi":"10.1109/IECON.1989.69697","DOIUrl":"https://doi.org/10.1109/IECON.1989.69697","url":null,"abstract":"An inspection system based on two-dimensional vision and the algorithms for inspecting various surface mount component defects are discussed. The surface mount postsolder inspection system described detects component polarity, shifted components, missing components, bridges, and the presence/absence of a solder fillet with an accuracy of 99.9%. Insufficient solder on a fillet can be detected with 99.5% accuracy.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124757409","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 : 1989-11-06DOI: 10.1109/IECON.1989.69678
C. Maciag, G. Cook
A method for identifying a linear plant with accessible state under servo control is described. The method is characterized by an attempt to perform the identification task on a system described by its continuous-time state-space model. Such an approach is desirable, since it allows greater insight into the physical mechanisms of the system than the input-output models. The method for identification of multiple input-output linear plants is general enough to allow for physical parametrization as well as a black-box approach to the modeling of the unknown disturbance. Initial formulation of the problem allows for identification of incremental changes rather than obsolete values of system parameters. The assumption made is that the unknown system parameters remain constant over the period of time over which identification is applied.<>
{"title":"Identification of linear plants using state-space models","authors":"C. Maciag, G. Cook","doi":"10.1109/IECON.1989.69678","DOIUrl":"https://doi.org/10.1109/IECON.1989.69678","url":null,"abstract":"A method for identifying a linear plant with accessible state under servo control is described. The method is characterized by an attempt to perform the identification task on a system described by its continuous-time state-space model. Such an approach is desirable, since it allows greater insight into the physical mechanisms of the system than the input-output models. The method for identification of multiple input-output linear plants is general enough to allow for physical parametrization as well as a black-box approach to the modeling of the unknown disturbance. Initial formulation of the problem allows for identification of incremental changes rather than obsolete values of system parameters. The assumption made is that the unknown system parameters remain constant over the period of time over which identification is applied.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129451361","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 : 1989-11-06DOI: 10.1109/IECON.1989.69616
F. Boudjema, M. Boscardin, P. Bidan, J. Marpinard, M. Valentin, J. Abatut
The authors present an application of variable structure systems (VSS) theory, and the associated sliding mode, to a full bridge buck converter used to produce an AC sine voltage. To design a sliding mode controller, the pole assignment method is used. The equivalent control method makes it possible to determine the existence of the sliding regime in the state space. A pulse-width-modulated (PWM) control technique method makes possible AC sine voltage generation. Under high-frequency control switchings, there is an ideal equivalence among sliding mode control and PWM. Experimental results for both of these methods show that under a fixed high switching frequency, the equivalent control corresponding to a sliding motion coincides with the duty ratio of the PWM technique.<>
{"title":"VSS approach to a full bridge buck converter used for AC sine voltage generation","authors":"F. Boudjema, M. Boscardin, P. Bidan, J. Marpinard, M. Valentin, J. Abatut","doi":"10.1109/IECON.1989.69616","DOIUrl":"https://doi.org/10.1109/IECON.1989.69616","url":null,"abstract":"The authors present an application of variable structure systems (VSS) theory, and the associated sliding mode, to a full bridge buck converter used to produce an AC sine voltage. To design a sliding mode controller, the pole assignment method is used. The equivalent control method makes it possible to determine the existence of the sliding regime in the state space. A pulse-width-modulated (PWM) control technique method makes possible AC sine voltage generation. Under high-frequency control switchings, there is an ideal equivalence among sliding mode control and PWM. Experimental results for both of these methods show that under a fixed high switching frequency, the equivalent control corresponding to a sliding motion coincides with the duty ratio of the PWM technique.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121449029","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 : 1989-11-06DOI: 10.1109/IECON.1989.69660
S. P. Chan
A novel technique for obtaining an acceleration feedback signal is proposed to achieve fast and accurate motion control in a servomotor drive. The preview tracking operation is used to compensate for the inherent time delay associated with the sampling process of digital controllers. In obtaining an estimate of the ahead-error, a pseudoacceleration feedback control action is accomplished. Since actual measurement of the acceleration signal is not required, practical implementation problems associated with acquisition of the acceleration are avoided. The information derived is equivalent to a discrete-time approximation to the second derivative operation. Computer simulation results showed that the servo system with digital PI (proportional-integral) controller incorporating pseudoacceleration feedback achieved fast and well-damped response to changes in the reference command as well as drastic disturbance suppression performance.<>
{"title":"Digital controller algorithm incorporating pseudo-acceleration feedback","authors":"S. P. Chan","doi":"10.1109/IECON.1989.69660","DOIUrl":"https://doi.org/10.1109/IECON.1989.69660","url":null,"abstract":"A novel technique for obtaining an acceleration feedback signal is proposed to achieve fast and accurate motion control in a servomotor drive. The preview tracking operation is used to compensate for the inherent time delay associated with the sampling process of digital controllers. In obtaining an estimate of the ahead-error, a pseudoacceleration feedback control action is accomplished. Since actual measurement of the acceleration signal is not required, practical implementation problems associated with acquisition of the acceleration are avoided. The information derived is equivalent to a discrete-time approximation to the second derivative operation. Computer simulation results showed that the servo system with digital PI (proportional-integral) controller incorporating pseudoacceleration feedback achieved fast and well-damped response to changes in the reference command as well as drastic disturbance suppression performance.<<ETX>>","PeriodicalId":384081,"journal":{"name":"15th Annual Conference of IEEE Industrial Electronics Society","volume":"23 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114022980","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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