Pub Date : 1996-03-31DOI: 10.1109/SSST.1996.493496
X. Sen, Wang Yu
This paper discusses a method, based on complete linearization, combining a nonlinear state observer design for nonlinear system. By applying the scheme to a polymeric reaction process, the simulation results show that it has not only good tracking ability and convergence but also better parameter robustness.
{"title":"Designs and applications of observer for nonlinear control system","authors":"X. Sen, Wang Yu","doi":"10.1109/SSST.1996.493496","DOIUrl":"https://doi.org/10.1109/SSST.1996.493496","url":null,"abstract":"This paper discusses a method, based on complete linearization, combining a nonlinear state observer design for nonlinear system. By applying the scheme to a polymeric reaction process, the simulation results show that it has not only good tracking ability and convergence but also better parameter robustness.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117247681","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.1996.493502
Steven R. Ashcraft, Mark Halpin
There has been significant interest in general classes of power electronic-based active power conditioners such as static condensers and dynamic voltage restorers. These systems are discussed in this paper with a focus on the inverter output stage. The inverters considered include conventional six- and twelve-pulse square wave, pulse-width modulated, and multi-level inverters. Current- and voltage-controlled inverters are considered where appropriate. Each of these inverter topologies has been successfully applied to a number of applications such as adjustable-speed motor drives and static VAr compensators but only limited information is available concerning the use of various topologies with active power conditioning equipment. This paper is intended to assimilate the information that is available in a convenient manner so as to provide the basis for continued research in this area.
{"title":"DC-AC inverters for static condenser and dynamic voltage restorer applications","authors":"Steven R. Ashcraft, Mark Halpin","doi":"10.1109/SSST.1996.493502","DOIUrl":"https://doi.org/10.1109/SSST.1996.493502","url":null,"abstract":"There has been significant interest in general classes of power electronic-based active power conditioners such as static condensers and dynamic voltage restorers. These systems are discussed in this paper with a focus on the inverter output stage. The inverters considered include conventional six- and twelve-pulse square wave, pulse-width modulated, and multi-level inverters. Current- and voltage-controlled inverters are considered where appropriate. Each of these inverter topologies has been successfully applied to a number of applications such as adjustable-speed motor drives and static VAr compensators but only limited information is available concerning the use of various topologies with active power conditioning equipment. This paper is intended to assimilate the information that is available in a convenient manner so as to provide the basis for continued research in this area.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132634334","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":null,"pages":null},"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.1996.493469
C. Vargas, M. Hegde, M. Naraghi-Pour
Presents modified least loaded routing (MLLR), a routing policy where no preference is given to the direct single link path but rather the first choice path is chosen statistically based on the results of an optimization problem. The authors calculate shadow prices for MLLR using the blocking probability obtained from a fixed point performance evaluation algorithm. Numerical results comparing performance of LLR and MLLR in, terms of blocking probability are introduced. As an application, the authors formulate and solve a nonlinear constrained optimization problem to calculate the load sharing coefficients that result in a maximum network rate of return for fixed levels of OD pair blocking probabilities.
{"title":"Shadow prices for modified least loaded routing (MLLR)","authors":"C. Vargas, M. Hegde, M. Naraghi-Pour","doi":"10.1109/SSST.1996.493469","DOIUrl":"https://doi.org/10.1109/SSST.1996.493469","url":null,"abstract":"Presents modified least loaded routing (MLLR), a routing policy where no preference is given to the direct single link path but rather the first choice path is chosen statistically based on the results of an optimization problem. The authors calculate shadow prices for MLLR using the blocking probability obtained from a fixed point performance evaluation algorithm. Numerical results comparing performance of LLR and MLLR in, terms of blocking probability are introduced. As an application, the authors formulate and solve a nonlinear constrained optimization problem to calculate the load sharing coefficients that result in a maximum network rate of return for fixed levels of OD pair blocking probabilities.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131859406","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.1996.493486
J.C. Lee, C. Swietlik
A SGML markup system is presented. One major obstacle for the SGML to gain more application is the prohibitively high cost of the markup process. The system the authors present adopts an incremental design approach. This approach helps to "divide and conquer" each specific problem encountered during the markup process and ensures that the system converges to a almost-fully automated markup system. The major software components of the system are described. Some selective algorithms are also introduced.
{"title":"Toward automated document reformatting: a SGML markup system","authors":"J.C. Lee, C. Swietlik","doi":"10.1109/SSST.1996.493486","DOIUrl":"https://doi.org/10.1109/SSST.1996.493486","url":null,"abstract":"A SGML markup system is presented. One major obstacle for the SGML to gain more application is the prohibitively high cost of the markup process. The system the authors present adopts an incremental design approach. This approach helps to \"divide and conquer\" each specific problem encountered during the markup process and ensures that the system converges to a almost-fully automated markup system. The major software components of the system are described. Some selective algorithms are also introduced.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133239583","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.1996.493463
S. Chemishkian
It is shown that complete design for a multivariable plant with unstructured additive uncertainty requires conforming of the plant model and controller, i.e. minimization of model uncertainty bound rated to the uncertainty bound, allowed by the controller for particular design specifications. A sample design procedure is developed using a SVD controller and quasi-normalization technique in order to re-solve a DC/AC convertor robust control problem.
{"title":"Conforming design of robust multivariable control with DC/AC convertor example","authors":"S. Chemishkian","doi":"10.1109/SSST.1996.493463","DOIUrl":"https://doi.org/10.1109/SSST.1996.493463","url":null,"abstract":"It is shown that complete design for a multivariable plant with unstructured additive uncertainty requires conforming of the plant model and controller, i.e. minimization of model uncertainty bound rated to the uncertainty bound, allowed by the controller for particular design specifications. A sample design procedure is developed using a SVD controller and quasi-normalization technique in order to re-solve a DC/AC convertor robust control problem.","PeriodicalId":135973,"journal":{"name":"Proceedings of 28th Southeastern Symposium on System Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131752717","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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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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