飞机气体系统泄漏超声信号的处理方法  

Research on Ultrasonic Leakage detection of Military Aircraft Gas System

作　　者：李俊杰[1] 王宏伟[1] 王俊生[1] 

机构地区：[1]空军航空大学航空机械工程系,长春130022

出　　处：《无损检测》2010年第11期861-864,共4页Nondestructive Testing

摘　　要：利用FIR带通数字滤波器、混沌系统和AR模型功率谱估计相结合的方法,实现在有较大噪声背景的机场环境下对飞机气体系统泄漏超声信号的提取。给出了基于该理论的具体算法及设计思路,进行了基于Matlab/simulink的仿真。经验证,该方法能够实现飞机气体管路的微小泄漏的检测,大大减少了背景噪声的影响,为飞机气体系统泄漏检测提供了新的思路。The method of bandpass digital filter,chaos theory and AR model spectrum estimation was used to test the ultrasonic signal of airplane gas system leakage from strong background noise on airport.The design and method based on the theory were given and simulated by Matlab/simulink.It was verified that the method can detect the tiny leakage of aircraft gas system and reduce the influence of noise.It is a new leakage detection of aircraft gas system.

关 键 词：气体泄漏 超声检测 FIR滤波器 混沌系统 谱估计 

分 类 号：V233.3[航空宇航科学与技术—航空宇航推进理论与工程] V245.3