Parameter Estimation and Noise Filter in Chaotic Measurement
CHEN Zhong-yong1, CHEN Zhuo2, ZHANG Hong3
1.Information Center,Zhejiang Bureau of Quality and Technical Supervision, Hangzhou, Zhejiang 310013, China;
2.Automation Department,Zhejiang University City College, Hangzhou, Zhejiang 310015, China;
3.Biomedical Engineering Department, Zhejiang University, Hangzhou, Zhejiang 310027, China
Abstract The way of improving parameter chaotic measurement precision with symbolic analysis is studied.A new circle map circuit is used in the system,according to symbolic dynamics,the rule of symbol partition and the symbol acquiring method only by logic judge is presented,and the distance formula of symbol sequence space is also defined.Firstly,fasten initial method is applied,and then Markov symbolic state transfer probability optimization is used to estimate measuring parameters more accurately.Simulation experiment for frequency measurement of base voltage is done.The results show that the method is effective in restraining noise and improving precision.
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2013, Vol. 34 
