旋转叶片鸟撞动态应变测量系统设计

Design of Dynamic Strain Measurement System of Rotor Blades Impacted by Bird

为了解决旋转叶片鸟撞时动态应变测量困难的问题,提出一种基于在线检测和高速暂存的测量方法。通过实时在线检测,将鸟撞发生时全过程的应变量采集并高速存储在非易失性存储器中。重点设计多通道动态应变测量系统,包括检测存储单元和地面辅助装置,满足精度、速率要求,实现在线检测、高速存储和无线数据传输等功能。试验表明,系统具有较高的测量精度,能实时检测到鸟撞发生,最快以6通道200 kHz的速率采集和存储,并利用无线数据传输,满足旋转叶片鸟撞动态应变测量要求。

In order to solve the difficulties of dynamic strain measurement of rotor blades impacted by bird, a method based on on-line detection and high-speed temporary storage is put forward. Through the real-time on- line detection, the strain data of bird impact in the whole process is collected and stored in a non-volatile SRAM. A multi-channel dynamic strain measurement system is designed mainly, including the detection and storage unit and the ground auxiliary device, which can meet the requirements of accuracy and speed, and real- ize the functions of on-line detection, high-speed storage and wireless data transmission. Tile tests indicate that the system has high accuracy and can detect the bird impact in real-time, and the speed of collection and stor- age is 200 kHz with 6 channels, and the test is convenient by using radio communication, which satisfies the dynamic strain measurement of rotor blades impacted by bird.