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Hierarchical fault tolerance in wireless networked control systems
Wireless Networked Control Systems (WNCS) have recently emerged as a replacement for wired control networks. Wireless networked control systems are more suitable for environments that require higher flexibility and robustness. In previous literature a wireless manufacturing line was proposed. The...
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2015
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| _version_ | 1867613407870451712 |
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| access_status_str | Open Access |
| author | Makled, Esraa Aziz |
| author_browse | Makled, Esraa Aziz |
| author_facet | Makled, Esraa Aziz |
| author_sort | Makled, Esraa Aziz |
| collection | Thesis |
| dc_rights_str_mv | The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. |
| description | Wireless Networked Control Systems (WNCS) have recently emerged as a replacement for wired control networks. Wireless networked control systems are more suitable for environments that require higher flexibility and robustness. In previous literature a wireless manufacturing line was proposed. The work-cells communication was through IEEE 802.11 technologies and a switched Ethernet backbone. This thesis is aiming to improve the current solution by adding a supervisor to the existing system. The supervisor could be either in passive or active mode. Passive supervisor would intervene when all controllers in the network fail, while active supervisor would act once any controller on the line fail. The system was simulated using OPNET software with 95% confidence analysis. The ability of the system to withstand external interference was assessed through adding a single band jammer to the OPNET simulation. The system was able to hold up to 8KB interfering file sent from a single band jammer affecting the full Wi-Fi spectrum. All results were subjected to a 95% confidence analysis The performability of passive and active supervisor systems was compared. A Markov model of both systems was built. It was shown that by time, the performability of a passive supervisor system is enhanced while that of an active supervisor system degraded. However, the active supervisor showed a better performability in all cases. |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-1133 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:39.635Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-1133 Hierarchical fault tolerance in wireless networked control systems Makled, Esraa Aziz Wireless Networked Control Systems (WNCS) have recently emerged as a replacement for wired control networks. Wireless networked control systems are more suitable for environments that require higher flexibility and robustness. In previous literature a wireless manufacturing line was proposed. The work-cells communication was through IEEE 802.11 technologies and a switched Ethernet backbone. This thesis is aiming to improve the current solution by adding a supervisor to the existing system. The supervisor could be either in passive or active mode. Passive supervisor would intervene when all controllers in the network fail, while active supervisor would act once any controller on the line fail. The system was simulated using OPNET software with 95% confidence analysis. The ability of the system to withstand external interference was assessed through adding a single band jammer to the OPNET simulation. The system was able to hold up to 8KB interfering file sent from a single band jammer affecting the full Wi-Fi spectrum. All results were subjected to a 95% confidence analysis The performability of passive and active supervisor systems was compared. A Markov model of both systems was built. It was shown that by time, the performability of a passive supervisor system is enhanced while that of an active supervisor system degraded. However, the active supervisor showed a better performability in all cases. 2015-06-01T07:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/134 https://fount.aucegypt.edu/context/etds/article/1133/viewcontent/Makled_Msc_Thesis.pdf The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. Theses and Dissertations AUC Knowledge Fountain Fault tolerance Wireless Networked Control Systems |
| spellingShingle | Fault tolerance Wireless Networked Control Systems Makled, Esraa Aziz Hierarchical fault tolerance in wireless networked control systems |
| title | Hierarchical fault tolerance in wireless networked control systems |
| title_full | Hierarchical fault tolerance in wireless networked control systems |
| title_fullStr | Hierarchical fault tolerance in wireless networked control systems |
| title_full_unstemmed | Hierarchical fault tolerance in wireless networked control systems |
| title_short | Hierarchical fault tolerance in wireless networked control systems |
| title_sort | hierarchical fault tolerance in wireless networked control systems |
| topic | Fault tolerance Wireless Networked Control Systems |
| url | https://fount.aucegypt.edu/etds/134 https://fount.aucegypt.edu/context/etds/article/1133/viewcontent/Makled_Msc_Thesis.pdf |
| work_keys_str_mv | AT makledesraaaziz hierarchicalfaulttoleranceinwirelessnetworkedcontrolsystems |