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原文传递 Hazard Assessment for Usage Credits on Helicopters Using Health and Usage Monitoring System. Final rept.

题名：	Hazard Assessment for Usage Credits on Helicopters Using Health and Usage Monitoring System. Final rept.
作者：	Augustin-M.
关键词：	Helicopters-; Monitoring-systems.;Load-Force; Fatigue-Mechanics; Technology-; Data-collection; Rotorcraft-aircraft; Methodology-; Errors-; Analysis-; Prototype-.
摘要：	A rotorcraft Health and Usage Monitoring System (HUMS) has two important roles. First, by accounting for maneuvers and conditions that are more severe than those that the aircraft was designed for, premature fatigue and other types of failures that could be catastrophic can be avoided. Second, by obtaining credit for service that is less demanding than those for which the aircraft was certified, longer service times can be justified, which will allow more economical operations. However, while usage monitoring has prevented failures, to date, no applicants have successfully followed the guidance of the Federal Aviation Administration Advisory Circular (AC) to develop individual aircraft usage credits. This report collects data and other information that was developed by Bell Helicopter Textron for its HUMS applications and provides it in a systematic manner to support more general and informed use of this important technology by its incorporation into the AC. A detailed overview of the HUMS methodology is provided in this report that describes how flight condition recognition is used to determine an individual aircraft load spectrum that, in turn, is used to calculate the effective hours that correspond to this usage. The report then focuses on sources of error in usage monitoring and how these can be overcome. These include inaccurate data, missing data, and incorrect algorithms. Next, system compliance with usage applications is discussed. Finally, a prototype usage system for implementing and using HUMS is outlined, which has been evaluated for compliance with the HUMS AC. This analysis verified that the prototype system and its architecture are compliant with the intent of the AC, including required parameter rates and accuracy levels. This report provides a valuable resource for usage monitoring that can both increase safety and enhance more economical operations, while also providing the basis for the eventual linkage of HUMS with the rotorcraft damage tolerance methodology.
报告类型：	科技报告