Abstract A novel method for Petri net controller synthesis to exclude forbidden states has been proposed. The method is based on the concepts of place invariants and the structural conflicts of Petri net theory. Design methodologies to deal with place (marking) constraints, transition (firing vector) constraints, and combined place/transition constraints are given. The Petri net controller derived is maximally permissive. Furthermore, it can be applied to any processes which can be modelled by ordinary Petri nets, without the restriction of safety. This method is very attractive even for large Petri net models and will be applicable to practical manufacturing systems due to its simplicity.
{"title":"DESIGN OF PETRI NET CONTROLLERS TO EXCLUDE FORBIDDEN STATES IN MANUFACTURING SYSTEMS","authors":"Y. Y. Yang, D. Linkens","doi":"10.1049/IC:19951563","DOIUrl":"https://doi.org/10.1049/IC:19951563","url":null,"abstract":"Abstract A novel method for Petri net controller synthesis to exclude forbidden states has been proposed. The method is based on the concepts of place invariants and the structural conflicts of Petri net theory. Design methodologies to deal with place (marking) constraints, transition (firing vector) constraints, and combined place/transition constraints are given. The Petri net controller derived is maximally permissive. Furthermore, it can be applied to any processes which can be modelled by ordinary Petri nets, without the restriction of safety. This method is very attractive even for large Petri net models and will be applicable to practical manufacturing systems due to its simplicity.","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133999452","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}
{"title":"Intelligent manufacturing: European and international research and development","authors":"W. V. Puymbroeck","doi":"10.1049/IC:19951557","DOIUrl":"https://doi.org/10.1049/IC:19951557","url":null,"abstract":"","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919608","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}
In order to remain competitive in the current economic climate an effective manufacturing strategy is vital for any business. The content elements defining a manufacturing strategy and the performance measures of these elements are clearly identified in the literature. Of these performance measures flexibility is one which is difficult to quantify. This paper therefore proposes a viable tool which can help businesses to identify current levels of flexibility, hence enabling the ability to improve manufacturing flexibility in accordance with strategic objectives. (5 pages)
{"title":"Evaluation of intelligent manufacturing system flexibility","authors":"N. Bateman, C. Wainwright","doi":"10.1049/IC:19951564","DOIUrl":"https://doi.org/10.1049/IC:19951564","url":null,"abstract":"In order to remain competitive in the current economic climate an effective manufacturing strategy is vital for any business. The content elements defining a manufacturing strategy and the performance measures of these elements are clearly identified in the literature. Of these performance measures flexibility is one which is difficult to quantify. This paper therefore proposes a viable tool which can help businesses to identify current levels of flexibility, hence enabling the ability to improve manufacturing flexibility in accordance with strategic objectives. (5 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121190634","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}
Cellular manufacturing principles allied with the single-cycle ordering concept is a promising way of reducing the complexity of manufacturing systems and speeding up the flow of material and information. Such an alliance calls for planning the operations of cellular manufacturing systems for flexible output and resource levels. This paper describes the way in which fuzzy logic can be applied for this purpose. (5 pages)
{"title":"PLANNING CELLULAR MANUFACTURING SYSTEMS USING FUZZY LOGIC","authors":"T. J. Wang, K. Chaharbaghi","doi":"10.1049/IC:19951562","DOIUrl":"https://doi.org/10.1049/IC:19951562","url":null,"abstract":"Cellular manufacturing principles allied with the single-cycle ordering concept is a promising way of reducing the complexity of manufacturing systems and speeding up the flow of material and information. Such an alliance calls for planning the operations of cellular manufacturing systems for flexible output and resource levels. This paper describes the way in which fuzzy logic can be applied for this purpose. (5 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123739585","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}
Describes some of the objectives and constraints of the operator of a FMS in a modern manufacturer and describes some software tools which have been written to support the operator in these tasks. (5 pages)
{"title":"Supporting the operator of a flexible manufacturing system with dynamic schedule repair","authors":"J. Efstathiou","doi":"10.1049/IC:19951561","DOIUrl":"https://doi.org/10.1049/IC:19951561","url":null,"abstract":"Describes some of the objectives and constraints of the operator of a FMS in a modern manufacturer and describes some software tools which have been written to support the operator in these tasks. (5 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132877102","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 study of machine processes using the mean-tracking cluster algorithm has provided useful results and a greater understanding of the processes. Clusters denoting faulty and fault-free machine behaviour derived from analyses in Sutanto and Warwick (1995) have provided guidance as to which regions to operate in and which to avoid. However, some clusters could not be so easily defined since they contained overlapping regions of faulty and fault-free machine behaviour. Clustering on process trajectories has separated these regions to a degree that they could be better defined. In doing so, correlations between errors were made more visible. The clustering exercise was then taken further to identify regions of successful and troublesome start-ups by clustering on start-up data. The results did not only define these regions successfully, but revealed that each start-up that was carried out had some probability of success and was never a non-starter start-up. (5 pages)
{"title":"Use of cluster analysis for the study of machine processes","authors":"E. Sutanto","doi":"10.1049/IC:19951565","DOIUrl":"https://doi.org/10.1049/IC:19951565","url":null,"abstract":"The study of machine processes using the mean-tracking cluster algorithm has provided useful results and a greater understanding of the processes. Clusters denoting faulty and fault-free machine behaviour derived from analyses in Sutanto and Warwick (1995) have provided guidance as to which regions to operate in and which to avoid. However, some clusters could not be so easily defined since they contained overlapping regions of faulty and fault-free machine behaviour. Clustering on process trajectories has separated these regions to a degree that they could be better defined. In doing so, correlations between errors were made more visible. The clustering exercise was then taken further to identify regions of successful and troublesome start-ups by clustering on start-up data. The results did not only define these regions successfully, but revealed that each start-up that was carried out had some probability of success and was never a non-starter start-up. (5 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127416004","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}
To design, implement and operate an efficient manufacturing organisation, a systems view is necessary; this picture is further complicated as manufacturing systems are also dynamic in nature. Holistic design of manufacturing systems, that is using dynamic systems thinking based on business strategy, can help to optimise technical, organisational and human factors in new system implementation. During the last decade numerous packages for the simulation of manufacturing systems have been developed as a support for the analysis and design of these systems. Simulation has traditionally concentrated on details, which is important at the design stage, but many of the total system aspects such as machine, organisation and human aspects are lost. This paper presents the concept of a virtual arena as a means of approaching the holistic design of manufacturing systems; the literature relating to this concept is also presented in outline. Special interest is placed upon work relating to the total or holistic view of manufacturing organisations. Current research initiatives in Scandinavia are also presented. (5 pages)
{"title":"Holistic design of manufacturing systems","authors":"Hans Bylesjö, U. Eriksson, T. Ilar, A. Kinnander","doi":"10.1049/IC:19951560","DOIUrl":"https://doi.org/10.1049/IC:19951560","url":null,"abstract":"To design, implement and operate an efficient manufacturing organisation, a systems view is necessary; this picture is further complicated as manufacturing systems are also dynamic in nature. Holistic design of manufacturing systems, that is using dynamic systems thinking based on business strategy, can help to optimise technical, organisational and human factors in new system implementation. During the last decade numerous packages for the simulation of manufacturing systems have been developed as a support for the analysis and design of these systems. Simulation has traditionally concentrated on details, which is important at the design stage, but many of the total system aspects such as machine, organisation and human aspects are lost. This paper presents the concept of a virtual arena as a means of approaching the holistic design of manufacturing systems; the literature relating to this concept is also presented in outline. Special interest is placed upon work relating to the total or holistic view of manufacturing organisations. Current research initiatives in Scandinavia are also presented. (5 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129235512","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}
Heracles is a system for applying the object-oriented techniques of modern software production to the construction of modern automated (i.e. “robot”) factories. In programming, an object consists of data and the actions defined on it: in HERACLES, an object is a hardware component (e.g a grabber), data, and a software template defining the methods implemented on that object. A CAD system and a software design environment are used to create the objects, which are stored in a library. Objects are used by the code generator, simulation, monitoring, and diagnostics systems. Traditional design methods have no integration of any of these components. HERACLES also allows class information to be re-used in future projects. (6 pages)
{"title":"APPLICATION OF OBJECT-ORIENTED TECHNIQUESTO THE DESIGN AND OPERATION OF FACTORIES","authors":"Graham Wheeler","doi":"10.1049/IC:19951559","DOIUrl":"https://doi.org/10.1049/IC:19951559","url":null,"abstract":"Heracles is a system for applying the object-oriented techniques of modern software production to the construction of modern automated (i.e. “robot”) factories. In programming, an object consists of data and the actions defined on it: in HERACLES, an object is a hardware component (e.g a grabber), data, and a software template defining the methods implemented on that object. A CAD system and a software design environment are used to create the objects, which are stored in a library. Objects are used by the code generator, simulation, monitoring, and diagnostics systems. Traditional design methods have no integration of any of these components. HERACLES also allows class information to be re-used in future projects. (6 pages)","PeriodicalId":250927,"journal":{"name":"Intelligent Manufacturing Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134317521","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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