SMART AIRCRAFT SKIN IMPACT AREA POSITIONING METHOD BASED ON TRUNCATED REVERSE WEIGHTED SUM

摘要

Disclosed is a truncated reverse-weighted sum based impact region localization method of aircraft smart skin, belonging to the technical fields of aerospace smart structure and health monitoring. A piezoelectric sensor array is placed on an aircraft smart skin structure, and is connected with multiple impact region monitoring systems. After each impact region monitoring system obtains digital sequences induced by an impact, the method includes: firstly, truncating each digital sequence as a characteristic digital sequence, and calculating a reverse-weighted value of the characteristic digital sequence; then, calculating, by a monitoring center according to piezoelectric sensors constituting impact monitoring sub-regions, a reverse-weighted sum of each impact monitoring sub-region; and finally, identifying the impact monitoring sub-region with the maximum reverse-weighted sum as a region where the impact occurs. The method is simple, high in impact region localization accuracy, favorable for embedded programming implementation, and can solve the problem of localization conflicts existing in network monitoring of multiple impact region monitoring systems and the problem of difficulty in accurately locating an intermediate region.