Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory
This paper presents a supervisory control theory based offline method for calculating restart states in a manufacturing control system. Given these precalculated restart states, an operator can be given correct instructions for how to resynchronize the control system and the manufacturing resources...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2013-12-01
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| Series: | Machines |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2075-1702/1/3/116 |
| _version_ | 1818245880380129280 |
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| author | Patrik Bergagård Martin Fabian |
| author_facet | Patrik Bergagård Martin Fabian |
| author_sort | Patrik Bergagård |
| collection | DOAJ |
| description | This paper presents a supervisory control theory based offline method for calculating restart states in a manufacturing control system. Given these precalculated restart states, an operator can be given correct instructions for how to resynchronize the control system and the manufacturing resources during the online restart process. The proposed method enables restart after unforeseen errors. It is assumed that the control system is modeled by operations and that possible operation sequences emerge through dependencies between the operations. The paper shows how reexecution requirements may be included in the calculation to obtain a correct behavior for the restarted system. In addition, it is shown how to filter out restart states that require less effort for the operator during the online restart, and how to adapt the nominal production to always enable restart in desired restart states. |
| first_indexed | 2024-12-12T14:39:57Z |
| format | Article |
| id | doaj.art-5d3468d23abc4f95b4c9655fba00e000 |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-12-12T14:39:57Z |
| publishDate | 2013-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-5d3468d23abc4f95b4c9655fba00e0002022-12-22T00:21:18ZengMDPI AGMachines2075-17022013-12-011311614110.3390/machines1030116machines1030116Calculating Restart States for Systems Modeled by Operations Using Supervisory Control TheoryPatrik Bergagård0Martin Fabian1Department of Signals and Systems, Chalmers University of Technology, Göteborg, SE-412 96, SwedenDepartment of Signals and Systems, Chalmers University of Technology, Göteborg, SE-412 96, SwedenThis paper presents a supervisory control theory based offline method for calculating restart states in a manufacturing control system. Given these precalculated restart states, an operator can be given correct instructions for how to resynchronize the control system and the manufacturing resources during the online restart process. The proposed method enables restart after unforeseen errors. It is assumed that the control system is modeled by operations and that possible operation sequences emerge through dependencies between the operations. The paper shows how reexecution requirements may be included in the calculation to obtain a correct behavior for the restarted system. In addition, it is shown how to filter out restart states that require less effort for the operator during the online restart, and how to adapt the nominal production to always enable restart in desired restart states.http://www.mdpi.com/2075-1702/1/3/116discrete event systemsrestartsystem recovery |
| spellingShingle | Patrik Bergagård Martin Fabian Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory Machines discrete event systems restart system recovery |
| title | Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory |
| title_full | Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory |
| title_fullStr | Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory |
| title_full_unstemmed | Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory |
| title_short | Calculating Restart States for Systems Modeled by Operations Using Supervisory Control Theory |
| title_sort | calculating restart states for systems modeled by operations using supervisory control theory |
| topic | discrete event systems restart system recovery |
| url | http://www.mdpi.com/2075-1702/1/3/116 |
| work_keys_str_mv | AT patrikbergagard calculatingrestartstatesforsystemsmodeledbyoperationsusingsupervisorycontroltheory AT martinfabian calculatingrestartstatesforsystemsmodeledbyoperationsusingsupervisorycontroltheory |