Nonlinear Acoustics for the conditioning monitoring of Aerospace structures (NACMAS)

航空航天部门面临着在飞行准备系统和子系统中嵌入传感器的压力，以便状态监测可以在制造期间、地面上或维护期间就此类系统的适飞性提供连续和早期的报告。Theta Technologies是一家总部位于英国的全球领先企业，将非线性共振技术商业化，用于航空航天部件的无损检测。适用的部件可以是金属、复合材料或陶瓷，它们可以是常规制造或添加制造的。非线性共振提供了一种独特的机会，可以在任何最终故障发生之前很久就检测出非常细微的裂纹(称为“接触裂纹”或“隐形缺陷”)或分层(如“接吻结合”)和冲击损伤的形成和扩展。然而，该方法的性质要求发射和接收传感器及其与被测系统的关系必须充分和可靠地线性，以便检测到的任何非线性都可以确信地与该系统中的缺陷相关联。该项目将对嵌入到复合材料组件中的一系列传感器进行性能评估。预期的结果是最佳实践技术，表明哪些传感器和联轴器适用于一系列航空航天子系统，以便利用非线性共振对航空航天结构进行条件监测。

There is pressure in and on the aerospace sector to embed sensors in flight-ready systems and subsystems in order that Condition Monitoring may provide continuous and early-warning reports as to the flightworthiness of such systems during their manufacture, while on the ground or during maintenance intervals.Theta Technologies is a UK-based global leader in the commercialisation of the Nonlinear Resonance technique for Non-Destructive Testing of aerospace components. Applicable components can be metallic, composite or ceramic, and they can be conventionally or additively manufactured.Nonlinear Resonance offers a unique opportunity to detect the formation and propagation of very fine cracks (known as 'contact cracks' or 'stealth flaws') or delaminations (such as 'kissing bonds') and impact damage far in advance of any eventual failure. The nature of the method, however, requires that transmission and reception sensors and their relationship with the system under test must be sufficiently and reliably linear, in order that any nonlinearity detected can be confidently associated with flaws in that system.The project will conduct a performance assessment of a range of sensors when embedded into composite subassemblies. The intended outcome is best-practice knowhow indicating which sensors and couplings are appropriate for a range of aerospace subsystems in order to carry out Conditioning Monitoring of aerospace structures using Nonlinear Resonance.