基于混沌技术的“逼近搜索”测频新方法研究

Study on New Method of Frequency Test Named Approach-and-Search Method Based on Chaos Technology

着重从测试应用的角度研究了典型的混沌方程Duffing方程的特征,指出Duffing方程所具有幅值敏感性、频率敏感性、宽的混沌区和单一大周期区的性质是进行测试的前提,特别是找到了有规律间歇混沌的频率条件,进而首次提出采用数字滤波技术,以期望的有规律间歇混沌现象为判据的'逼近搜索'测量频率的新方法,该方法可实现全量程内频率的等绝对精度测量.

The character of chaotic equation is studied in view of test application. It is the property such as amplitude sensitivity, frequency sensitivity and wide section of chaos and singular large period possessed by Duffing Equation that is precondition of test. The new Approach-and-search method which adopts digital filter technology and uses phenomena of anticipant regular intermittent chaotic motion as criterion is presented for the first time. The method can realize equi-absoluteness precision test in full test range.