Pub Date : 1996-03-31DOI: 10.1109/SSST.1996.493500
S. Hsu
Properties of a reactive power compensator with a harmonic blocking feature that enables the author to reduce the waveform distortion caused by harmonic generating loads are discussed in this paper. The discussed compensator is built of a series filter tuned to the fundamental frequency and a shunt capacitor. Due to voltage resonance, the series filter does not increase the line impedance for the fundamental, but increases this impedance for higher harmonics. Because of this property, such a compensator is termed as a 'harmonic blocking compensator' (HBC) in the paper. The shunt capacitor provides the needed susceptance for reactive power compensation and a low impedance shunt path for current harmonics generated in the load. This paper discusses the design procedure and presents simulation results of the HBC.
{"title":"Reactive power compensator with harmonic blocking feature","authors":"S. Hsu","doi":"10.1109/SSST.1996.493500","DOIUrl":"https://doi.org/10.1109/SSST.1996.493500","url":null,"abstract":"Properties of a reactive power compensator with a harmonic blocking feature that enables the author to reduce the waveform distortion caused by harmonic generating loads are discussed in this paper. The discussed compensator is built of a series filter tuned to the fundamental frequency and a shunt capacitor. Due to voltage resonance, the series filter does not increase the line impedance for the fundamental, but increases this impedance for higher harmonics. Because of this property, such a compensator is termed as a 'harmonic blocking compensator' (HBC) in the paper. The shunt capacitor provides the needed susceptance for reactive power compensation and a low impedance shunt path for current harmonics generated in the load. This paper discusses the design procedure and presents simulation results of the HBC.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123985785","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 : 1996-03-31DOI: 10.1109/SSST.1996.493490
Mon-Chu Chen, Yu-Tung Liu
Recognizing multiple shape is one kind of human visual behavior. People usually recognize several distinct emergent subshapes from multiple shapes and give them different interpretations. This paper presents a symbolic/neural hybrid system to provide computers with this kind of ability. Through this approach, the recognition system is divided into three modules. Source images are sent to the first module, that is a neural network, of the hybrid system. The network is responsible for transforming the source image into abstract visual data, named pre-attention distribution and local feature information. Then, the abstract visual data are processed in the second module that is a symbolic subsystem. The subsystem is responsible for making decision in the visual search attention processes and for managing the features of the whole shape. Finally, another neural network takes the previous results from the symbolic subsystem and performs the final recognition.
{"title":"A symbolic/neural hybrid approach to multiple shape recognition","authors":"Mon-Chu Chen, Yu-Tung Liu","doi":"10.1109/SSST.1996.493490","DOIUrl":"https://doi.org/10.1109/SSST.1996.493490","url":null,"abstract":"Recognizing multiple shape is one kind of human visual behavior. People usually recognize several distinct emergent subshapes from multiple shapes and give them different interpretations. This paper presents a symbolic/neural hybrid system to provide computers with this kind of ability. Through this approach, the recognition system is divided into three modules. Source images are sent to the first module, that is a neural network, of the hybrid system. The network is responsible for transforming the source image into abstract visual data, named pre-attention distribution and local feature information. Then, the abstract visual data are processed in the second module that is a symbolic subsystem. The subsystem is responsible for making decision in the visual search attention processes and for managing the features of the whole shape. Finally, another neural network takes the previous results from the symbolic subsystem and performs the final recognition.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121285726","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 : 1996-03-31DOI: 10.1109/SSST.1996.493476
A. Azemi, E. Yaz
Extensions of a robust adaptive observer are presented for state reconstruction of nonlinear systems with uncertainty having unknown bounds. The observers use nonlinear gains which are continuously updated to guarantee a globally asymptotically convergent observation error. A generalization to known waveform type disturbances and measurement uncertainties is pointed out and an example is included for illustrative purposes.
{"title":"Nonlinear robust adaptive observers","authors":"A. Azemi, E. Yaz","doi":"10.1109/SSST.1996.493476","DOIUrl":"https://doi.org/10.1109/SSST.1996.493476","url":null,"abstract":"Extensions of a robust adaptive observer are presented for state reconstruction of nonlinear systems with uncertainty having unknown bounds. The observers use nonlinear gains which are continuously updated to guarantee a globally asymptotically convergent observation error. A generalization to known waveform type disturbances and measurement uncertainties is pointed out and an example is included for illustrative purposes.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652476","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 : 1996-03-31DOI: 10.1109/SSST.1996.493483
M. C. Mickle, J.J. Zhu
This paper presents simulation case studies of a missile autopilot design as presented in a previous paper. The autopilot design is for angle of attack and normal acceleration tracking using a previously developed extended-mean assignment (EMA) control technique for linear time varying (LTV) systems. The EMA control technique is based on a new eigenvalue concept called series D-eigenvalue, for LTV systems. Closed-loop stability is achieved by the assignment of the extended-mean of these time-varying SD-eigenvalues to the left-half complex plane in a way similar to the eigenvalue (pole) assignment technique for linear time invariant (LTI) systems. The simulation results are for three desired command tracking case studies and are all very good.
{"title":"Simulation results for missile autopilot design based on extended mean assignment","authors":"M. C. Mickle, J.J. Zhu","doi":"10.1109/SSST.1996.493483","DOIUrl":"https://doi.org/10.1109/SSST.1996.493483","url":null,"abstract":"This paper presents simulation case studies of a missile autopilot design as presented in a previous paper. The autopilot design is for angle of attack and normal acceleration tracking using a previously developed extended-mean assignment (EMA) control technique for linear time varying (LTV) systems. The EMA control technique is based on a new eigenvalue concept called series D-eigenvalue, for LTV systems. Closed-loop stability is achieved by the assignment of the extended-mean of these time-varying SD-eigenvalues to the left-half complex plane in a way similar to the eigenvalue (pole) assignment technique for linear time invariant (LTI) systems. The simulation results are for three desired command tracking case studies and are all very good.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128443675","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 : 1996-03-31DOI: 10.1109/SSST.1996.493553
O. Ismail, J. M. Jahabar
In this paper a method for structured linear uncertain system reduction is presented. The reduced model is obtained by retaining [/spl beta//sub 1//sup -/, /spl beta//sub 1//sup +/] and [/spl alpha//sub 1//sup -/, /spl alpha//sub 1//sup +/] (for the steady state of reduced model and original system be equal) along with [/spl beta//sub 1//sup -/, /spl beta//sub 1//sup +/] and [/spl alpha//sub 1//sup -/, /spl alpha//sub 1//sup +/] for (i=2, 3, ..., r-1) which are contributing most to impulse response energy [I/sub s//sup -/, I/sub s//sup +/]. A numerical example illustrates the procedure.
{"title":"Structured linear uncertain systems reduction","authors":"O. Ismail, J. M. Jahabar","doi":"10.1109/SSST.1996.493553","DOIUrl":"https://doi.org/10.1109/SSST.1996.493553","url":null,"abstract":"In this paper a method for structured linear uncertain system reduction is presented. The reduced model is obtained by retaining [/spl beta//sub 1//sup -/, /spl beta//sub 1//sup +/] and [/spl alpha//sub 1//sup -/, /spl alpha//sub 1//sup +/] (for the steady state of reduced model and original system be equal) along with [/spl beta//sub 1//sup -/, /spl beta//sub 1//sup +/] and [/spl alpha//sub 1//sup -/, /spl alpha//sub 1//sup +/] for (i=2, 3, ..., r-1) which are contributing most to impulse response energy [I/sub s//sup -/, I/sub s//sup +/]. A numerical example illustrates the procedure.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"885 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128708667","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 : 1996-03-31DOI: 10.1109/SSST.1996.493546
F. Simons, R. Harden, A.L. Robinson
In spite of the proliferation of signals and system texts, authors have tended to avoid adequate treatments of continuous singularity functions. Furthermore, the limited treatments of singularity functions are not only incomplete, they often include erroneous concepts. Thus, the authors attempt to provide some insight to the nature of singularity functions, present a generalized extension of singularity function definitions, and correct a serious error in several signal and system texts. All topics are designed to supplement signal and system text instructions.
{"title":"Continuous singularity functions insight, extensions, and corrections","authors":"F. Simons, R. Harden, A.L. Robinson","doi":"10.1109/SSST.1996.493546","DOIUrl":"https://doi.org/10.1109/SSST.1996.493546","url":null,"abstract":"In spite of the proliferation of signals and system texts, authors have tended to avoid adequate treatments of continuous singularity functions. Furthermore, the limited treatments of singularity functions are not only incomplete, they often include erroneous concepts. Thus, the authors attempt to provide some insight to the nature of singularity functions, present a generalized extension of singularity function definitions, and correct a serious error in several signal and system texts. All topics are designed to supplement signal and system text instructions.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"80 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130718769","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 : 1996-03-31DOI: 10.1109/SSST.1996.493544
W. E. Hutchcraft, R. Gordon
Richardson extrapolation can be used to obtain an accurate solution to a problem while being efficient with both computer time and memory. In this paper, Richardson extrapolation is used in conjunction with the finite difference method to solve both one- and two-dimensional electrostatics problems. Numerical results are presented for both cases, and it is seen that high accuracy can be achieved.
{"title":"The use of Richardson extrapolation to reduce the truncation error in the finite difference solution of one and two dimensional electrostatics problems","authors":"W. E. Hutchcraft, R. Gordon","doi":"10.1109/SSST.1996.493544","DOIUrl":"https://doi.org/10.1109/SSST.1996.493544","url":null,"abstract":"Richardson extrapolation can be used to obtain an accurate solution to a problem while being efficient with both computer time and memory. In this paper, Richardson extrapolation is used in conjunction with the finite difference method to solve both one- and two-dimensional electrostatics problems. Numerical results are presented for both cases, and it is seen that high accuracy can be achieved.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123005735","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 : 1996-03-31DOI: 10.1109/SSST.1996.493517
D.R. Brown, A. Phadke
A dispersed storage and generation system consists of both a source of energy for conversion to electricity and a means to interconnect this unit to the electric utility system. Most dispersed generators connected to the utility distribution system are less than 5 MW. A new emerging problem arises when a utility circuit breaker is opened while a capacitor-bank and load is energized very near a dispersed storage and generation unit. A new resonance-detecting relay will be developed that has the ability to trip if dangerously high off-nominal frequency voltages are produced at the capacitor-bank or load during this condition (capacitor-excitation).
{"title":"A new digital relay for dispersed storage and generation (DSG) units (power systems)","authors":"D.R. Brown, A. Phadke","doi":"10.1109/SSST.1996.493517","DOIUrl":"https://doi.org/10.1109/SSST.1996.493517","url":null,"abstract":"A dispersed storage and generation system consists of both a source of energy for conversion to electricity and a means to interconnect this unit to the electric utility system. Most dispersed generators connected to the utility distribution system are less than 5 MW. A new emerging problem arises when a utility circuit breaker is opened while a capacitor-bank and load is energized very near a dispersed storage and generation unit. A new resonance-detecting relay will be developed that has the ability to trip if dangerously high off-nominal frequency voltages are produced at the capacitor-bank or load during this condition (capacitor-excitation).","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117188587","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 : 1996-03-31DOI: 10.1109/SSST.1996.493536
D. W. Sellers
This paper presents a brief introduction to the three primary directions of research in job shop scheduling. These areas are heuristic rules, classical optimization methods, and neural network approaches. The primary purpose is to provide a starting point for researchers who are interested in this area, so there is a focus on references to helpful technical papers in each of these areas of research.
{"title":"A survey of approaches to the job shop scheduling problem","authors":"D. W. Sellers","doi":"10.1109/SSST.1996.493536","DOIUrl":"https://doi.org/10.1109/SSST.1996.493536","url":null,"abstract":"This paper presents a brief introduction to the three primary directions of research in job shop scheduling. These areas are heuristic rules, classical optimization methods, and neural network approaches. The primary purpose is to provide a starting point for researchers who are interested in this area, so there is a focus on references to helpful technical papers in each of these areas of research.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115390183","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 : 1996-03-31DOI: 10.1109/SSST.1996.493506
C. Jen, S. Nicosia, P. Valigi
The linearized dynamic model of a prototype robot arm of two flexible links is constructed using Ritz's approach and is validated by experimental frequency response functions. Some active control schemes are then designed to manipulate this robot arm on a small manoeuvre base, using pole placement technique, for the purpose of path tracking as well as vibration suppression, and are tested by computer simulations.
{"title":"Theoretical and experimental study of dynamics and control of a two-link flexible robot manipulator of revolute joints","authors":"C. Jen, S. Nicosia, P. Valigi","doi":"10.1109/SSST.1996.493506","DOIUrl":"https://doi.org/10.1109/SSST.1996.493506","url":null,"abstract":"The linearized dynamic model of a prototype robot arm of two flexible links is constructed using Ritz's approach and is validated by experimental frequency response functions. Some active control schemes are then designed to manipulate this robot arm on a small manoeuvre base, using pole placement technique, for the purpose of path tracking as well as vibration suppression, and are tested by computer simulations.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114138120","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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