Structural Health Monitoring (SHM) systems provide a useful tool to diagnose any engineered structural system and eventual critical damage that may occur at any moment during the operational life. In the past two decades progress has been made in all the fields of SHM, from sensor technology to system integrated techniques. The common goal of any SHM system, whatever the specific application is, may be synthesized in three main points: identify structural deterioration stage, recognize its severity and evaluate the necessity to make a more detailed inspection or proceed to maintenance on condition, based on a potential hazard that may lead to a catastrophic failure. The implementation of such a system leads to making normal operations with the same safety levels but with more efficient maintenance procedures. In addition, it allows avoiding the oversizing of structural components extending the inspection and maintenance intervals. Both these results help to reduce the life-cycle cost of the specific engineered system as it is possible to perform maintenance when it is necessary, i.e. on-condition.

The current state of the art about the guided waves (GW) based structural health monitoring of aerospace composite structures is reviewed in this paper, looking at the implementation of the methodologies proposed and assessed by the authors and giving an outlook on what has been done by the scientific community.

结构健康监测 (SHM) 系统提供了一种有用的工具，可用于诊断任何工程结构系统以及在使用寿命期间的任何时刻可能发生的最终严重损坏。在过去的二十年中，SHM 的所有领域都取得了进展，从传感器技术到系统集成技术。任何 SHM 系统的共同目标，无论具体应用是什么，都可以归纳为三个要点：识别结构退化阶段、识别其严重程度并评估进行更详细检查或进行条件维护的必要性，基于可能导致灾难性故障的潜在危险。这种系统的实施导致正常操作具有相同的安全水平，但具有更有效的维护程序。此外，它可以避免结构部件的尺寸过大，从而延长检查和维护间隔。这两个结果都有助于降低特定工程系统的生命周期成本，因为可以在必要时（即在条件下）进行维护。

本文回顾了基于导波 (GW) 的航空航天复合结构结构健康监测的最新技术，研究了作者提出和评估的方法的实施情况，并对已完成的工作进行了展望。科学界。