SYSTEM FOR TEMPERATURE INSENSITIVE DAMAGE DETECTION
To provide a system and a method for temperature insensitive damage detection.SOLUTION: The system includes an aircraft structure and a structural health monitoring (SHM) system for monitoring the health of the aircraft structure independent of temperature. The SHM system includes an actuator bonded...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a system and a method for temperature insensitive damage detection.SOLUTION: The system includes an aircraft structure and a structural health monitoring (SHM) system for monitoring the health of the aircraft structure independent of temperature. The SHM system includes an actuator bonded to the aircraft structure and configured to generate a reference vibration signal having a reference amplitude that propagates through the aircraft structure at a first time, and generate a comparison vibration signal having a comparison amplitude that propagates through the aircraft structure at a second time after the first time. The comparison amplitude represents damage incurred by the aircraft structure between the first time and the second time. The SHM system includes a sensor bonded to the aircraft structure that receives the reference vibration signal and the comparison vibration signal, and a processor configured to compute a gain damage index as a function of the reference amplitude divided by the comparison amplitude.SELECTED DRAWING: Figure 1
【課題】温度に敏感でない損傷検出のためのシステムおよび方法を提供する。【解決手段】このシステムは、航空機構造と、航空機構造の健全性を温度と無関係に監視するための構造健全性監視(SHM)システムと、を含む。SHMシステムは、航空機構造に接合され、第1の時刻に航空機構造を通して伝搬する基準信号を有する基準振動信号を発生させ、そして第1の時刻の後の第2の時刻に航空機構造を通して伝搬する比較振幅を有する比較振動信号を発生させるアクチュエータを含む。比較振幅は、第1の時刻と第2の時刻との間に航空機構造が受けた損傷を表す。SHMシステムは、基準振動信号および比較振動信号を受信する航空機構造に接合されたセンサと、基準振幅を比較振幅で除算した値の関数として利得損傷指数を計算するプロセッサと、を含む。【選択図】図1 |
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