HHT方法在遥测振动信号检测中的应用研究

介绍了HHT的基本原理、特点、存在问题及解决手段,应用该法对仿真振动信号和遥测振动信号进行了处理分析,结果表明其能够有效地对非线性、非平稳振动信号进行分解,且具有自适应性,在时域和频域内具有较好的分辨能力,分解出的分量具有较为清晰的物理意义,由于其表示结果的多样性,可以对单个分量做进一步精确分析,能够检测出信号的突变,并能定位突变的时间点,为飞行器飞行状态判定、优化方案设计以及故障检测提供重要依据。

Application and Research of the HHT Method in the Telemetry Vibration Signal Detection

This paper introduced the HHT of the basic principles, characteristics, problems and solutions means. The simulation and telemetry vibration signals were processed and analysis from the application of the method. Results show that it can effectively decompose nonlinear and nonstationary vibration signal with selfadaptive and a better resolving power in the time domain and the frequency domain. And the de composition of the components has a clear physical meaning. Due to their diversity, the single component can further do accurate analysis, to detect signal mutations and locate a point in time, which provides an important basis for judgment of aircraft flight conditions, optimization design and fault detection.