Rapid Mental Workload Detection of Air Traffic Controllers with Three EEG Sensors

• Published in: Sensors (Basel, Switzerland) Vol. 24; no. 14; p. 4577
• Main Authors: Li, Hui, Zhu, Pei, Shao, Quan
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 15.07.2024
• Subjects: Accuracy; air traffic controller; Air traffic controllers; Brain research; Classification; Cognitive ability; Decision making; detection of mental workload; Fatigue; Fourier transforms; gamma wave; Genetic algorithms; Methods; mRMR algorithm; NASA-TXL; Physiology; Workloads; NASA-TXL; gamma wave; detection of mental workload; mRMR algorithm; air traffic controller
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s24144577

Air traffic controllers’ mental workload significantly impacts their operational efficiency and safety. Detecting their mental workload rapidly and accurately is crucial for preventing aviation accidents. This study introduces a mental workload detection model for controllers based on power spectrum features related to gamma waves. The model selects the feature with the highest classification accuracy, β + θ + α + γ, and utilizes the mRMR (Max-Relevance and Min-Redundancy) algorithm for channel selection. Furthermore, the channels that were less affected by ICA processing were identified, and the reliability of this result was demonstrated by artifact analysis brought about by EMG, ECG, etc. Finally, a model for rapid mental workload detection for controllers was developed and the detection rate for the 34 subjects reached 1, and the accuracy for the remaining subjects was as low as 0.986. In conclusion, we validated the usability of the mRMR algorithm in channel selection and proposed a rapid method for detecting mental workload in air traffic controllers using only three EEG channels. By reducing the number of EEG channels and shortening the data processing time, this approach simplifies equipment application and maintains detection accuracy, enhancing practical usability.