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全数字伺服电机轴角转换单元建模与分析_刘亚静.pdfVIP

全数字伺服电机轴角转换单元建模与分析_刘亚静.pdf

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33 3 Vol.33 No.3 Jan.25, 2013 148 2013 1 25 Proceedings of the CSEE ©2013 Chin.Soc.for Elec.Eng. 0258-8013 (2013) 03-0148-07 TM 383 A 470 40  ( 100044) Modeling and Analysis of an All-digital Magnetic Encoder-to-digital Converters for Servo Motors LIU Yajing, FAN Yu, LÜ Gang (School of Electrical Engineering, Beijing Jiaotong University, Haidian District, Beijing 100044, China) ABSTRACT: Magnetic encoder-to-digital converters (MEDC) (coordinate rotational digital computerCORDIC) based on a tracking method had the merits of noise-rejection capability, simultaneous extraction of the angular position and XY Z speed and so on. Application specific integrated circuits (ASIC) had the advantages of parallelism, flexibility and real-time. There were some problems such as choice of system FPGA architecture and algorithm structure, determination of A/D 10 12 14 parameters-region, and optimization of word-length etc, while implementing all-digital and full-hardware MEDC on ASIC. The coordinate rotational digital computer (CORDIC) algorithm was proposed instead of numeric controlled oscillator (NCO) and multiplier in the conventional tracking 0 method, and then an equivalent subtraction operator was derived through error analysis and calibration of the XY and Z channels. On the basis

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