A Methodology to Design FPGA-based PID Controllers

• Autor(a) principal: Lima, João
• Data de Publicação: 2006
• Outros Autores: Menotti, Ricardo, Cardoso, João M. P., Marques, Eduardo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.1/1153
• topic: PID (Proportional; FPGAs (Field-Programmable Gate Arrays); Bit-width analyzer; Derivative) controllers; Integral

This paper presents a methodology to implement PID (Proportional, Integral, Derivative) controllers in FPGAs (Field-Programmable Gate Arrays) using fixed-point numerical representation. The Matlab/Simulink environment is used for modeling, simulation and evaluation the performance provided by different fixed-point representations using a given control process. A static bit-width analyzer is used to give a specialized fixed-point representation for each operand/operator in the controller system. After bit-width analysis, a VHDL represen-tation of the system is generated. Results show that the proposed methodology leads to shorten design cycles achieving important resource savings by employing specialized fixed-point repre-sentations.