The application of different types of adaptive control for the power-frequency control of the power-generating system in the Netherlands is considered. Because of the large fluctuations in load, a fixed algorithm in the conventional area controller has some serious disadvantages. In the paper model reference adaptive control (MRAS) is applied in order to deal with variations in the parameter which relates the variations in the frequency to variations in the load. Adaptive control and conventional control are compared. Further improvements have been realized by changing the structure of the conventional power frequency control algorithm and by introducing a feed forward adaptive action. In the simulation numerical values of the power stations in Amsterdam (GEP) and Zeeland (PZEM), which operate within the tie-line system in the Netherlands, have been used.
{"title":"Power frequency control in a system of coupled generating units - Conventional versus adaptive approach","authors":"J. Amerongen, G. Honderd","doi":"10.1109/CDC.1980.271994","DOIUrl":"https://doi.org/10.1109/CDC.1980.271994","url":null,"abstract":"The application of different types of adaptive control for the power-frequency control of the power-generating system in the Netherlands is considered. Because of the large fluctuations in load, a fixed algorithm in the conventional area controller has some serious disadvantages. In the paper model reference adaptive control (MRAS) is applied in order to deal with variations in the parameter which relates the variations in the frequency to variations in the load. Adaptive control and conventional control are compared. Further improvements have been realized by changing the structure of the conventional power frequency control algorithm and by introducing a feed forward adaptive action. In the simulation numerical values of the power stations in Amsterdam (GEP) and Zeeland (PZEM), which operate within the tie-line system in the Netherlands, have been used.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128978323","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}
The composite control proposed in an earlier paper for a class of singularly perturbed nonlinear systems is now shown to possess properties essential for near-optimal feedback design. It asymptotically stabilizes the desired equilibrium and produces a finite cost which tends to the optimal cost for a slow problem as the singular perturbation parameter tends to zero. Thus the well-posedness of the full regulator problem is established. The stability results are also applicable to two-time scale systems which are not singularly perturbed, and the paper does not assume the knowledge of singular perturbation techniques.
{"title":"A two stage Lyapunov-Bellman feedback design of a class of nonlinear systems","authors":"J. Chow, P. Kokotovic","doi":"10.1109/CDC.1980.271972","DOIUrl":"https://doi.org/10.1109/CDC.1980.271972","url":null,"abstract":"The composite control proposed in an earlier paper for a class of singularly perturbed nonlinear systems is now shown to possess properties essential for near-optimal feedback design. It asymptotically stabilizes the desired equilibrium and produces a finite cost which tends to the optimal cost for a slow problem as the singular perturbation parameter tends to zero. Thus the well-posedness of the full regulator problem is established. The stability results are also applicable to two-time scale systems which are not singularly perturbed, and the paper does not assume the knowledge of singular perturbation techniques.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114417203","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}
A problem of practical importance in the design of message-switched data-communication networks is that of optimal capacity assignment. The problem consists of specifying the capacity for each link in a network in order to minimize the average message delay subject to a constraint on the total capacity available for assignment. This problem, and its dual in which the total capacity is minimized subject to an average message delay constraint, have been treated in detail in [1-3]. In this short paper, we consider a version of the dual problem in which the minimization is subject to a set of one or more end-to-end average message delay constraints. The motivation for this work stems from the fact that satisfaction of an average message delay constraint may not always provide an acceptable delay for certain source-destination pairs. This would, in general, be the case for communication between nodes which are widely separated in terms of the number of links that messages must traverse from one node to the other.
{"title":"Optimal capacity assignment in message-switched networks subject to end-to-end constraints","authors":"J. Meditch","doi":"10.1109/CDC.1980.272035","DOIUrl":"https://doi.org/10.1109/CDC.1980.272035","url":null,"abstract":"A problem of practical importance in the design of message-switched data-communication networks is that of optimal capacity assignment. The problem consists of specifying the capacity for each link in a network in order to minimize the average message delay subject to a constraint on the total capacity available for assignment. This problem, and its dual in which the total capacity is minimized subject to an average message delay constraint, have been treated in detail in [1-3]. In this short paper, we consider a version of the dual problem in which the minimization is subject to a set of one or more end-to-end average message delay constraints. The motivation for this work stems from the fact that satisfaction of an average message delay constraint may not always provide an acceptable delay for certain source-destination pairs. This would, in general, be the case for communication between nodes which are widely separated in terms of the number of links that messages must traverse from one node to the other.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121686311","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}
The present research has sought to understand human information-processing and task selection procedures in a dynamic multi-task environment. The approach has been to assimilate the results of a joint experimental and analytic program into a normative dynamic decision model(DDM) for predicting human task sequencing performance. To this end, a general multi-task paradigm was developed that retains the essential features of task selection in a manageable, yet manipulative, context. Via this framework, we have studied the effects of length of opportunity window, task values, and processing times on the human decision-making processes.
{"title":"\"A model for real-time human decision-making in a multi-task environment\"","authors":"K. Pattipati, D. Kleinman, A. Ephrath","doi":"10.1109/CDC.1980.271830","DOIUrl":"https://doi.org/10.1109/CDC.1980.271830","url":null,"abstract":"The present research has sought to understand human information-processing and task selection procedures in a dynamic multi-task environment. The approach has been to assimilate the results of a joint experimental and analytic program into a normative dynamic decision model(DDM) for predicting human task sequencing performance. To this end, a general multi-task paradigm was developed that retains the essential features of task selection in a manageable, yet manipulative, context. Via this framework, we have studied the effects of length of opportunity window, task values, and processing times on the human decision-making processes.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121725262","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}
Military command control is described as a process for ultimately controlling a geographic area. Some of the requirements of this process are identified and models of it suitable for developing analytic procedures are presented. Two examples which highlight possible system trade-offs are discussed. The differences in system and environmental parameters in different military scenarios are pointed out, and some promising avenues for future investigation are proposed.
{"title":"Command control as a process","authors":"J. Lawson","doi":"10.1109/CDC.1980.272008","DOIUrl":"https://doi.org/10.1109/CDC.1980.272008","url":null,"abstract":"Military command control is described as a process for ultimately controlling a geographic area. Some of the requirements of this process are identified and models of it suitable for developing analytic procedures are presented. Two examples which highlight possible system trade-offs are discussed. The differences in system and environmental parameters in different military scenarios are pointed out, and some promising avenues for future investigation are proposed.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130114635","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}
The purpose of this paper is to discuss, in an informal way, some of the challenging research opportunities that arise in the analysis and synthesis of Command, Control, and Communications (C3) systems. It is concluded that significant advances in the theory of distributed decision theory under dynamic uncertainty are necessary to properly understand and synthesize complex military C3 systems, and to advance the state-of-the-art.
{"title":"System theoretic challenges and research opportunities in military C3 systems","authors":"M. Athans","doi":"10.1109/CDC.1980.272010","DOIUrl":"https://doi.org/10.1109/CDC.1980.272010","url":null,"abstract":"The purpose of this paper is to discuss, in an informal way, some of the challenging research opportunities that arise in the analysis and synthesis of Command, Control, and Communications (C3) systems. It is concluded that significant advances in the theory of distributed decision theory under dynamic uncertainty are necessary to properly understand and synthesize complex military C3 systems, and to advance the state-of-the-art.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131357558","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}
"Control spillover" and "observation spillover" have surfaced as major roadblocks to successful application of state-of-the-art control techniques to vibration control of large space structures. Nevertheless, control (observation) spillover may be prevented by proper placement of actuators (sensors). If proper placement is not possible because of structural constraints, control spillover to (observation spillover from) secondary modes can still be prevented by synthesizing the existent actuator (sensor) influences. Alternatively, control spillover to (observation spillover from) nonprimary modes can be reduced, to various extent, by adding some bandstop filter to each input (output) channel. A combined systematic use of placement, synthesis, and filtering will yield better results. This paper presents the underlying theoretical foundation of a proposed three-step approach for alleviating the spillover problems, along with conditions and techniques for proper placement, proper synthesis, and proper filtering. An illustrative numerical example is also included.
{"title":"Three steps to alleviate control and observation spillover problems of large space structures","authors":"JiGuan G. Lin","doi":"10.1109/CDC.1980.271834","DOIUrl":"https://doi.org/10.1109/CDC.1980.271834","url":null,"abstract":"\"Control spillover\" and \"observation spillover\" have surfaced as major roadblocks to successful application of state-of-the-art control techniques to vibration control of large space structures. Nevertheless, control (observation) spillover may be prevented by proper placement of actuators (sensors). If proper placement is not possible because of structural constraints, control spillover to (observation spillover from) secondary modes can still be prevented by synthesizing the existent actuator (sensor) influences. Alternatively, control spillover to (observation spillover from) nonprimary modes can be reduced, to various extent, by adding some bandstop filter to each input (output) channel. A combined systematic use of placement, synthesis, and filtering will yield better results. This paper presents the underlying theoretical foundation of a proposed three-step approach for alleviating the spillover problems, along with conditions and techniques for proper placement, proper synthesis, and proper filtering. An illustrative numerical example is also included.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":" 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114051186","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}
A method for parameter estimation is derived that is insensitive to the noise distribution, and an example of its use for nonlinear systems is given. The method combines the sensitivity of the maximum-likelihood parameter estimator with the robustness of order statistics to reduce estimation uncertainty significantly, with only a slight increase in the variance. This algorithm shows improvements over conventional parameter estimates, in particular, in the case of small data sets.
{"title":"Parameter estimation in the presence of non-Gaussian noise","authors":"H. Salzwedel","doi":"10.1109/CDC.1980.271885","DOIUrl":"https://doi.org/10.1109/CDC.1980.271885","url":null,"abstract":"A method for parameter estimation is derived that is insensitive to the noise distribution, and an example of its use for nonlinear systems is given. The method combines the sensitivity of the maximum-likelihood parameter estimator with the robustness of order statistics to reduce estimation uncertainty significantly, with only a slight increase in the variance. This algorithm shows improvements over conventional parameter estimates, in particular, in the case of small data sets.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129382009","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}
The problem of state estimation in linear dynamic systems with fuzzy initial states and poorly defined perturbation input signals (i.e fuzzy inputs) is considered. A new notion of vector summ of n-dimensional fuzzy sets provides the basis for state and input "imprecision" propagation trough the systems dynamics. Recursive state estimation formulae are developed to obtain a fuzzy set of possible states at each instant of time.
{"title":"Fuzzy state estimation in linear dynamic systems","authors":"H. Sira-Ramírez","doi":"10.1109/CDC.1980.271820","DOIUrl":"https://doi.org/10.1109/CDC.1980.271820","url":null,"abstract":"The problem of state estimation in linear dynamic systems with fuzzy initial states and poorly defined perturbation input signals (i.e fuzzy inputs) is considered. A new notion of vector summ of n-dimensional fuzzy sets provides the basis for state and input \"imprecision\" propagation trough the systems dynamics. Recursive state estimation formulae are developed to obtain a fuzzy set of possible states at each instant of time.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"2619 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116404417","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}
This paper describes a multiloop root locus technique which has been used to study velocity output feedback controllers in very lightly damped structures. An example illustrates the pitfalls of a common model truncation approach used in designing these controllers.
{"title":"Study of velocity output vibration suppression controllers with a multiloop root locus","authors":"D. Herrick","doi":"10.1109/CDC.1980.271970","DOIUrl":"https://doi.org/10.1109/CDC.1980.271970","url":null,"abstract":"This paper describes a multiloop root locus technique which has been used to study velocity output feedback controllers in very lightly damped structures. An example illustrates the pitfalls of a common model truncation approach used in designing these controllers.","PeriodicalId":332964,"journal":{"name":"1980 19th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1980-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116826827","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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