基于FPGA的推进剂药柱应变测试装置研究  

Research on Solid Propellant Grain Strain Storage Measurement System Based on FPGA

作　　者：范徽[1] 孔德仁[1] 王芳[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《测控技术》2014年第9期52-55,共4页Measurement & Control Technology

摘　　要：固体火箭发动机工作于发射过载状态下,位于燃烧室内的推进剂药柱因承受惯性力作用产生一定的形变。为测试推进剂药柱在发射过载状态下的轴向应变响应特性,针对发动机装药结构、材质的特殊性,研制了一种基于FPGA的推进剂药柱大应变存储测试装置,解决了该环境下传统应变电测系统应用于装药应变检测过程中呈现出的数据捕获率低、非线性误差大等问题。装置采用FPGA芯片搭建主控模块,集信号调理、触发采集、存储等功能于一体,可安装于发动机内进行发射过载试验,实时完成装药应变响应信息的快速采集与存储。试验后回收装置,通过上位机提取测试数据,处理和再现装药应变时间历程曲线。When solid engine rocket is working in overloaded launching condition, the solid propellant grain in- side combustor will generate a certain amount of deformation because of inertial force. In order to investigate the characteristics response to the axial strain of the propellant grain in overloaded launching state, a kind of large strain storage test device based on FPGA is developed, aiming at the particularity of the propellant grain charging structure and material. This device solves the problems of low data capture rate and huge non-linear error presented in traditional strain electrical measuring system used in loading strain testing process under that circumstance. The FPGA chip is adopted to construct the host system and the strain signal disposal, trigger collection and storage are concentrated into one whole. This device can be installed in solid engine rocket to proceed overloaded launching test, and complete rapid acquisition and storage of the loading strain response information in real time.

关 键 词：固体推进剂 发射过载 FPGA 大应变测量 存储测试 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]