Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets
Background and objective: In human-machine (HM) hybrid control systems, human operator and machine cooperate to achieve the control objectives. To enhance the overall HM system performance, the discrete manual control task-load by the operator must be dynamically allocated in accordance with continu...
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| Format: | Article |
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/44578/ |
| _version_ | 1848796949599223808 |
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| author | Zhang, Jian-Hua Xia, Jia-Jun Garibaldi, Jonathan M. Groumpos, Petros P. Wang, Ru-Bin |
| author_facet | Zhang, Jian-Hua Xia, Jia-Jun Garibaldi, Jonathan M. Groumpos, Petros P. Wang, Ru-Bin |
| author_sort | Zhang, Jian-Hua |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Background and objective: In human-machine (HM) hybrid control systems, human operator and machine cooperate to achieve the control objectives. To enhance the overall HM system performance, the discrete manual control task-load by the operator must be dynamically allocated in accordance with continuous-time fluctuation of psychophysiological functional status of the operator, so-called operator functional state (OFS). The behavior of the HM system is hybrid in nature due to the co-existence of discrete task-load (control) variable and continuous operator performance (system output) variable.
Methods: Petri net is an effective tool for modeling discrete event systems, but for hybrid system involving discrete dynamics, generally Petri net model has to be extended. Instead of using different tools to represent continuous and discrete components of a hybrid system, this paper proposed a method of fuzzy inference Petri nets (FIPN) to represent the HM hybrid system comprising a Mamdani-type fuzzy model of OFS and a logical switching controller in a unified framework, in which the task-load level is dynamically reallocated between the operator and machine based on the model-predicted OFS. Furthermore, this paper used a multi-model approach to predict the operator performance based on three electroencephalographic (EEG) input variables (features) via the Wang-Mendel (WM) fuzzy modeling method. The membership function parameters of fuzzy OFS model for each experimental participant were optimized using artificial bee colony (ABC) evolutionary algorithm. Three performance indices, RMSE, MRE, and EPR, were computed to evaluate the overall modeling accuracy.
Results: Experiment data from six participants are analyzed. The results show that the proposed method (FIPN with adaptive task allocation) yields lower breakdown rate (from 14.8% to 3.27%) and higher human performance (from 90.30% to 91.99%).
Conclusion: The simulation results of the FIPN-based adaptive HM (AHM) system on six experimental participants demonstrate that the FIPN framework provides an effective way to model and regulate/optimize the OFS in HM hybrid systems composed of continuous-time OFS model and discrete-event switching controller. |
| first_indexed | 2025-11-14T19:56:07Z |
| format | Article |
| id | nottingham-44578 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:56:07Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-445782020-05-04T19:57:17Z https://eprints.nottingham.ac.uk/44578/ Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets Zhang, Jian-Hua Xia, Jia-Jun Garibaldi, Jonathan M. Groumpos, Petros P. Wang, Ru-Bin Background and objective: In human-machine (HM) hybrid control systems, human operator and machine cooperate to achieve the control objectives. To enhance the overall HM system performance, the discrete manual control task-load by the operator must be dynamically allocated in accordance with continuous-time fluctuation of psychophysiological functional status of the operator, so-called operator functional state (OFS). The behavior of the HM system is hybrid in nature due to the co-existence of discrete task-load (control) variable and continuous operator performance (system output) variable. Methods: Petri net is an effective tool for modeling discrete event systems, but for hybrid system involving discrete dynamics, generally Petri net model has to be extended. Instead of using different tools to represent continuous and discrete components of a hybrid system, this paper proposed a method of fuzzy inference Petri nets (FIPN) to represent the HM hybrid system comprising a Mamdani-type fuzzy model of OFS and a logical switching controller in a unified framework, in which the task-load level is dynamically reallocated between the operator and machine based on the model-predicted OFS. Furthermore, this paper used a multi-model approach to predict the operator performance based on three electroencephalographic (EEG) input variables (features) via the Wang-Mendel (WM) fuzzy modeling method. The membership function parameters of fuzzy OFS model for each experimental participant were optimized using artificial bee colony (ABC) evolutionary algorithm. Three performance indices, RMSE, MRE, and EPR, were computed to evaluate the overall modeling accuracy. Results: Experiment data from six participants are analyzed. The results show that the proposed method (FIPN with adaptive task allocation) yields lower breakdown rate (from 14.8% to 3.27%) and higher human performance (from 90.30% to 91.99%). Conclusion: The simulation results of the FIPN-based adaptive HM (AHM) system on six experimental participants demonstrate that the FIPN framework provides an effective way to model and regulate/optimize the OFS in HM hybrid systems composed of continuous-time OFS model and discrete-event switching controller. Elsevier 2017-06 Article PeerReviewed Zhang, Jian-Hua, Xia, Jia-Jun, Garibaldi, Jonathan M., Groumpos, Petros P. and Wang, Ru-Bin (2017) Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets. Computer Methods and Programs in Biomedicine, 144 . pp. 147-163. ISSN 1872-7565 Man-machine system Fuzzy inference petri net Operator functional state Human performance Adaptive functional allocation Electroencephalography http://www.sciencedirect.com/science/article/pii/S0169260716303546?via%3Dihub doi:10.1016/j.cmpb.2017.03.016 doi:10.1016/j.cmpb.2017.03.016 |
| spellingShingle | Man-machine system Fuzzy inference petri net Operator functional state Human performance Adaptive functional allocation Electroencephalography Zhang, Jian-Hua Xia, Jia-Jun Garibaldi, Jonathan M. Groumpos, Petros P. Wang, Ru-Bin Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title | Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title_full | Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title_fullStr | Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title_full_unstemmed | Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title_short | Modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| title_sort | modeling and control of operator functional state in a unified framework of fuzzy inference petri nets |
| topic | Man-machine system Fuzzy inference petri net Operator functional state Human performance Adaptive functional allocation Electroencephalography |
| url | https://eprints.nottingham.ac.uk/44578/ https://eprints.nottingham.ac.uk/44578/ https://eprints.nottingham.ac.uk/44578/ |