基于阶比跟踪的全息谱技术  

Research of Holospectrum Technique Based on Order Tracking

作　　者：魏玉果[1] 汤宝平[1] 程发斌[1] 秦晓峰[1] 

机构地区：[1]重庆大学机械工程学院机械,重庆400030

出　　处：《重庆大学学报（自然科学版）》2007年第2期9-12,21,共5页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50405009);教育部新世纪优秀人才支持计划资助项目(NECT-04-0849);重庆市自然科学基金计划资助项目(2006BB2242)

摘　　要：分析了传统全息谱技术的原理,针对传统全息谱技术只能应用于平稳信号的不足,提出了一种基于阶比跟踪的全息谱分析方法.该方法通过阶比跟踪采样,把时域里的非平稳信号转化为角域里的平稳信号,再应用传统全息谱技术进行分析,减少了非平稳信号对全息谱图的影响,扩大了全息谱分析方法的应用范围.研究了阶比跟踪全息谱的原理,并进行了仿真实验.仿真实验和误差分析表明:与传统全息谱分析方法相比,此方法可以有效用于非平稳信号的分析中,谱图清晰,效果明显.This paper analyzes the principle of THS （Traditional Holo-Spectrum） technique, and in allusion to the deficiency of THS that only can be used in stationary signal, a new holo-spectrum technique based on order tracking is proposed. By order tracking sampling technology, non-stationary signal in the time domain is transformed into stationary signal in the angle domain, then the THS technique can be applied. Through this way, the influence of non-stationary to THS is reduced and the application of THS is extended. The paper researches the principle of order tracking holo-spectrum and verified by a simulation experiment. The simulation result and error analysis demonstrate that this method can be valid used to analyze the non-stationary signal. The spectrum is distinct and the effect is apparent.

关 键 词：全息谱 阶比跟踪 非平稳信号 

分 类 号：TH113[机械工程—机械设计及理论]