Model-based flight phase suppression safety design and evaluation process for crew warnings
Authors: Lina Wu, Kai Liu
Abstract: The crew warning information provides the crew with status indication information that they need to know during normal or abnormal flight, accurately and effectively inform the crew of the aircraft status, and guide the crew to take corresponding measures or establish situational awareness to reduce the impact of failure.However, in some critical flight stages, the flight crew needs to concentrate on manipulating the aircraft. The appearance of inappropriate warning messages will cause interference to the flight crew and affect flight safety. Therefore, in the warning design of civil aircraft, a flight phase suppression plan for warnings is generally formulated to suppress part of the crew warning information in some specific flight phases.The design of the flight phase suppression of the crew warning information will lead to the failure of the crew warning information during the flight phase of the crew warning information suppression when the warning function is normal. notice".Therefore, the flight phase suppression plan for the crew warning information should be evaluated by the safety engineer to ensure that the suppressed warning information will not affect the pilot's current flight control and meet the safety requirements.In the process of safety assessment, the analysis of the impact of "unannounced" failures is to consider that the crew is not aware of the failure during the entire flight phase, and the crew is unable to perform mitigation procedures or establish situational awareness, resulting in the impact of "unannounced" failures than "announced" failures. Bigger. However, the flight phase suppression of the crew warning information does not mean that the flight phase does not fail. The crew can know the failure after the suppression phase; therefore, the "unannounced" effect of the flight phase suppression phase may be the same as the "unannounced" effect during the entire flight phase. It's not the same. Used directly, the "unannounced" failure impact level of the entire phase is used as the "unannounced" impact level of the flight phase suppression phase, which may be too conservative.This paper presents a safety assessment method for the suppression of civil aircraft crew warning information during flight phase. Through determining the establishment of a list of factors affecting the failure; establishing one by one the corresponding relationship matrix between the factors and the failure impact levels and the relationship matrix of the factors changing with time; finally establishing the relationship matrix of the civil aircraft's various failure impact levels with time. As a criterion for the safety of civil aircraft crew warning information during flight phase suppression.
Keywords: Safety, Assessment, Flight Crew, Warning
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