16. 422 Alerting Systems Prof, r, john hansman Acknowledgements to Jim Kuchar
System Supervisory Control Computer Interface Display Control Sensors Direct Observation 16.422 Alerting Systems Prof. R. John Hansman Acknowledgements to Jim Kuchar
口中 Consider Sensor System Display Or Threshold Sensor System Alert Radar Engine fire Detection Other
System Supervisory Control Computer Interface Display Control Sensors Direct Observation Consider Sensor System Threshold System Display Or Alert Sensor y Radar y Engine Fire Detection y Other
Decision-Aiding /Alerting System Architecture Automation Sensors actuator Interface Actuator Human Information transduction Control/ Actuation Decision Making Courtesy: Jim Kuchar
System Supervisory Control Computer Interface Display Control Sensors Direct Observation Decision-Aiding / Alerting System Architecture Sensors Displays Human Actuator Sensors Automation Actuator Environment Process Information Transduction Decision Making Control / Actuation Interface Courtesy: Jim Kuchar
Fundamental tradeoff in Alerting Decisions Uncertain current state azard · When to a|ert? a Too early a Unnecessary Alert Operator would have avoided hazard without alert Leads to distrust of system, delayed response O Too late missed Detection Incident occurs even with the alerting system Must balance Unnecessary Alerts and Missed Detections Courtesy: Jim Kuchar
System Supervisory Control Computer Interface Display Control Sensors Direct Observation Fundamental Tradeoff in Alerting Decisions y When to alert? Too early ºUnnecessary Alert Operator would have avoided hazard without alert Leads to distrust of system, delayed response Too late º Missed Detection Incident occurs even with the alerting system y Must balance Unnecessary Alerts and Missed Detections Hazard Uncertain Future Trajectory Uncertain current state x1 x 2 Courtesy: Jim Kuchar
The alerting Decision Examine consequences of alerting /not alerting O Alert is not issued: Nominal Trajectory(N a Alert is issued: Avoidance Trajectory (A) Hazard Hazard Current state Compute probability of Incident along each trajectory Courtesy: Jim Kuchar
System Supervisory Control Computer Interface Display Control Sensors Direct Observation The Alerting Decision y Examine consequences of alerting / not alerting Alert is not issued: Nominal Trajectory (N) Alert is issued: Avoidance Trajectory (A) A A Hazard Current State Hazard N Compute probability of Incident along each trajectory Courtesy: Jim Kuchar