基于植入式光纤传感网络的固体火箭发动机结构健康监测

Structural Health Monitoring of Solid Rocket Motor Based on Embedding Optical Fiber Sensing networks

摘要:

为实现对固体火箭发动机结构健康状态的实时检测和评估，设计并研制了高强度飞秒光栅传感网络，重点研究了传感与信号传输链路的涂覆和封装技术。开展了发动机界面脱粘扯模拟离实验研究，传感器可以准确测量脱粘及其发展趋势。设计了可用于发动机应变、温度和载荷施加的模拟演示系统，开发了基于传感器数据的发动机数字孪生模型，形成发动机实物与孪生体的精准映射。最后将光纤传感器阵列植入520型号发动机，对发动机壳体开展了水压监测实验、高低温存储实验、长周期监测实验和试车。传感器能够准确测量出发动机的应力应变状态，为固体火箭发动机的健康管理提供了有效的数据支撑。

Abstract:

In order to realize the real-time detection and evaluation of the structural health status of solid rocket motor (SRM), the high performance femtosecond grating sensing network was designed and developed. The coating and packaging technology of the sensing and signal transmission link was emphatically studied. The experimental study of SRM interface debonding simulation was carried out, and the sensor can accurately measure the debonding and its development trend. The simulation demonstration system for engine strain, temperature and load application is designed. The digital twin model of the SRM based on sensor data is developed to form a precise mapping between the SRM and the twin. Finally, the sensors array was implanted into the 520 SRM, and the water pressure monitoring experiment, high and low temperature storage experiment, long-term monitoring experiment and test run were carried out. The sensor can accurately measure the stress and strain state of the SRM, which provides effective data support for the health management of the SRM.