基于FPGA的控制算法定点化设计

doi:10.12052/gdutxb.190089

Abstract

Abstract: When the motion control algorithm is implemented on the FPGA(Field Programmable Gate Array), and the data type changed from floating point to fixed point, there is a problem that high precision cannot be guaranteed. To solve this problem, the range of each signal data in the algorithm is analyzed using the Fixed-Point Tool in simulink, and then the suggested bit width given by the Fixed-Point Tool is artificially modified. Therefore, the algorithm can solve the problem of resource waste caused by using a unified longer bit width on the FPGA while ensuring higher precision. Compared with the traditional artificially defined data bit width, the Fixed-Point Tool is used to set the data bit width, and the internal data bit width of the algorithm can be more flexibly and dynamically adjusted when the input data range changes.

Key words: control algorithm, FPGA(field programmable gate array), floating point to fixed point, high precision, fixed-point tool

CLC Number:

TN492

Heng Yuan, Wu Jian-cheng, Yang Zhi-jun. A Fixed-point Design of Control Algorithm Based on FPGA[J].Journal of Guangdong University of Technology, 2020, 37(03): 55-58.

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