Correction of Dynamic Error Result from Measurement System Limitations |
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Authors: | Zhi-jie ZHANG Dai-hua WANG Wen-lian WANG Wei WANG |
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Affiliation: | Key Lab of Instrumentation Science and Dynamic Testing (Ministry of Education),North University of China,Taiyuan 030051,China |
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Abstract: | The main cause of dynamic errors is due to frequency response limitation of measurement system.One way of solving this problem is designing an effective inverse tilter.Since the problem is ill-conditioned,a small uncertainty in the measurement will cause large deviation in reconstructed signals.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 freqtency 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 Signal-to-Noise ratio (SNR) are investigated.Flexibility of the method is verified.Application of correcting dynamic error is given. |
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Keywords: | dynamic error inverse filters correction of dynamic characteristic measurement system |
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