Civil aircraft crew alarm ranking method

Abstract

Cockpit crew alerts are primarily used to draw the attention of flight crews to be aware of failures, malfunctions, abnormal states or unexpected state changes in aircraft and aircraft systems. After the 80s of the 20th century, the design of the cockpit crew alert system has made great progress, which can integrate vision, hearing and touch to more effectively provide alerts for the flight crew. New technology applications also bring new challenges and difficulties. As aircraft systems become more complex, so do the number and form of crew alerts. How to quickly locate the most urgent and prioritized faults when multiple faults exist at the same time has become an urgent problem to be solved.In this paper, the sequencing method of crew alerts in the cockpit of civil aircraft is studied, and a method for crew alert priority evaluation is proposed. In this method, a set of crew alert priority evaluation index system is first established and each index scoring standard is given, and then the weight of different indicators is determined by the Precedence Chart to form a multi-index comprehensive evaluation model, and then the crew alarm is evaluated one by one to form a crew alarm ranking list.When establishing the priority evaluation index system, first of all, from the aspects of crew alert awareness and urgency of crew operation, "Impact on aircraft status", "Impact on crew", "Impact on passengers" and "Eventual risk without crew reaction" are selected as the indices. Then, from the aspects of fault impact, crew operation content and fault isolation after crew operation, "Affected system", "Function loss" and "Consequence on aircraft after crew action" are selected as the supplementary indicators; Finally, a set of crew alert priority evaluation index system is formed by combining the two aspects.When formulating the scoring standards for each indicator, according to the content of each indicator, combined with subjective evaluation and objective data, the scoring standard is formed, such as loss of function, different scores can be given according to complete loss, loss of one-third, loss of half, etc.When determining the weights of different indicators, the importance of each index in the flight crew when performing flight tasks is comprehensively weighed by the scoring of flight crews and flight experts. After analyzing the crew alerts one by one, the index score and weight can be superimposed to obtain a comprehensive score, and the crew alert ranking list can be obtained through the comprehensive score.The crew alert sequencing method proposed in this paper can help the flight crew quickly locate the fault that needs to be solved first when multiple faults exist at the same time, so as to effectively reduce the cognitive load of the pilot, improve the operational efficiency, ensure flight safety, and provide a new thinking for the cockpit crew alert sequencing of civil aircraft.