摘要
导弹发动机深层信息非常微弱,而且多次回波的时域频域严重重叠,信息提取难。通过系统响应的角度,对导弹发动机部位复合结构材料的超声信号进行建模,利用最优时间段截取分析建模,采用小波谱分析技术对导弹深层缺陷进行成功的识别。
Deep flaw information in missile engine composite structure is very weak and its echoes overlap badly in time field and frequency field, which lead to the difficulty in information abstraction. In this paper ultrasonic model of missile engine composite structure is set up and the optimal time window is selected to model, at last it can detect deep flaw in composite structure with the technology of wavelet-spectrum successfully.
出处
《噪声与振动控制》
CSCD
北大核心
2007年第1期45-47,53,共4页
Noise and Vibration Control
基金
国家自然科学基金(50475053)
关键词
振动与波
复合结构材料
小波谱
超声
导弹发动机
vibration and wave
composite structure
wavelet spectrum
ultrasonic
missile engine