tailieunhanh - báo cáo hóa học:" Research Article Word Length Selection Method for Controller Implementation on FPGAs Using the VHDL-2008 Fixed-Point and Floating-Point Packages"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Word Length Selection Method for Controller Implementation on FPGAs Using the VHDL-2008 Fixed-Point and Floating-Point Packages | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2010 Article ID 593264 11 pages doi 2010 593264 Research Article Word Length Selection Method for Controller Implementation on FPGAs Using the VHDL-2008 Fixed-Point and Floating-Point Packages I. Urriza L. A. Barragan D. Navarro J. I. Artigas and O. Lucia Departamento de Ingenieria Electronica y Comunicaciones Universidad de Zaragoza Maria de Luna 1 50018 Zaragoza Spain Correspondence should be addressed to I. Urriza urriza@ Received 23 December 2009 Revised 9 April 2010 Accepted 29 July 2010 Academic Editor Miriam Leeser Copyright 2010 I. Urriza et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. This paper presents a word length selection method for the implementation of digital controllers in both fixed-point and floatingpoint hardware on FPGAs. This method uses the new types defined in the VHDL-2008 fixed-point and floating-point packages. These packages allow customizing the word length of fixed and floating point representations and shorten the design cycle simplifying the design of arithmetic operations. The method performs bit-true simulations in order to determine the word length to represent the constant coefficients and the internal signals of the digital controller while maintaining the control system specifications. A mixed-signal simulation tool is used to simulate the closed loop system as a whole in order to analyze the impact of the quantization effects and loop delays on the control system performance. The method is applied to implement a digital controller for a switching power converter. The digital circuit is implemented on an FPGA and the simulations are experimentally verified. 1. Introduction The advances in FPGAs technology 1 2 have had a big impact on the implementation of digital .