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

摘要

A smart aircraft skin impact area positioning method based on a truncated reverse weighted sum, belonging to the technical fields of smart aerospace structures and health monitoring. Piezoelectric sensor arrays are arranged in a smart aircraft skin structure and are connected to multiple impact area monitoring systems. After each impact area monitoring system obtains a digital sequence generated by an impact, the method comprises: first truncating the digital sequence as characteristic digital sequences, calculating reverse weighted values of the characteristic digital sequences, then a monitoring center calculating, according to piezoelectric sensors constituting impact monitoring sub-areas, a reverse weighted sum of each impact monitoring sub-area, and finally determining the impact monitoring sub-area having the maximum reverse weighted sum as an area where the impact occurs. The method is simple, has high accuracy of impact area positioning, facilitates realizing embedded programming, and can solve the problem of a positioning conflict during networked monitoring of multiple impact area monitoring systems and the problem of the difficulty in accurately positioning a middle area.