Zhi-jie ZHANG(张志杰), Dai-hua WANG(王代华), Wen-lian WANG(王文廉) , Wei WANG(王巍)
Key Lab of Instrumentation Science and Dynamic Testing(Ministry o f Education), North University of China, Taiyuan 030051, China)
Abstract-The main cause of dynamic errors is due to frequency response limitation of measurement system. One way of solving this problem is de signing an effective inverse filter. Since the problem is ill-conditioned, a sm all uncertainty in the measurement will cause large deviation in reconstructed s ignals. The amplified noise has to be suppressed at the sacrifice of biasing in estimation. The paper presents a kind of designing method of inverse filter in f requency domain based on stabilized solutions of Fredholm integral equations of the first kind in order to reduce dynamic errors. Compared with previous several work, the method has advantage of generalization. Simulations with different Si gnal-to-Noise ratio (SNR) are investigated. Flexibility of the method is verif ied. Application of correcting dynamic error is given.
Key words-dynamic error; inverse filters; correction of dynamic characteristic; measurement system
Manuscript Number: 1674-8042(2010)04-0307-05
dio: 10.3969/j.issn.1674-8042.2010.04.01
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