FPGA Implementation of a Best-precision Fixed-point Digital PID Controller

摘要：

Proportional-Integral-Derivative (PID) controllers have been broadly used in many areas. Compared with analog controllers, digital ones by Digital Signal Processor (DSP) or Field Programmable Gate Arrays (FPGA) are more stable and easier to adjust parameter. Digital controllers are usually implemented with FPGA for its fast and stable performance. When it is implemented with FPGA, floating-point arithmetic is usually converted to fixed-point arithmetic. However the process of a floating-fixed conversion is complex, the period is long and the precision is proved to be low. Since the above problems, this paper proposes both best-precision fixed point arithmetic and the FPGA implementation details of a digital PID controller. And it illustrates the process of converting analog controllers to digital one. The simulation results show that the best-precision fixed point digital PID Controller is simple, and it outperforms by high-speed response, better precision, minor error and high dynamic range.

关键词： Best-precision Fixed-point digital PID controller FPGA

作者: Yankai XU Kai SHUANG Shan JIANG Xiaoliang WU

作者单位: Faculty of Mechanical and Electronic Engineering China University of Petroleum(Beijing)Beijing,China Faculty of Mechanical and Electronic Engineering China University of Petroleum(Beijing)Beijing, Chin

会议类型: 国际会议

会议名称: 2009 International Conference on Measuring Technology and Mechatronics Automation(ICMTMA 2009)(2009年检测技术与机电自动化国际会议)

会议地点: 张家界

会议语种:英文

页码: 384-387

在线出版日期: 2009-04-11（万方平台首次上网日期，不代表论文的发表时间）