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《China Mechanical Engineering(中国机械工程)》 2006-01
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A Design Method for Digital Filter and Its Applications

Liu Zhengshi 1 Wang Yong 1 Chen Enwei 1 Ge Yunjian 2 1.Hefei University of Technology,Hefei,230009 2. Hefei Institute of Intelligent Instrument,Chinese Academy of Science,Hefei,230031  
A new design method for digital filter-Pole-Zero Matched Method based on Bilinear Transformation was developed. The design idea and the steps of this method were presented. The method developed in the paper was compared with the widely used approaches for designing IIR DT filter, and the design examples show that the method is a combination of PW-BLT method and MZT method actually, and the PW-BLT method is a special case of this method.It remains the advantages of both two methods.The frequency aliasing can be avoided, the zeroes can be added automatically and the low-pass property of the analog filter can be preserved, and the expected position of poles and zeroes of the analog filter can be arrived at after transformation by using this method. Therefore, the method is very suitable for designing low-pass digital filter and digital compensation filter. A dynamic compensation filter used in wrist force sensor was designed using the method developed, which improved dynamic performance of the sensor efficiently.
【Fund】: 国家自然科学基金资助项目(60175027);; 国家863高技术研究发展计划资助项目(2001AA337010)
【CateGory Index】: TN713.7
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