A Fixed-point Design of Control Algorithm Based on FPGA

Heng Yuan; Wu Jian-cheng; Yang Zhi-jun

doi:10.12052/gdutxb.190089

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A Fixed-point Design of Control Algorithm Based on FPGA

更新时间：2026-05-27

- A Fixed-point Design of Control Algorithm Based on FPGA
- Vol. 37, Issue 3, Pages: 55-58(2020)
- 作者机构：
  
  广东工业大学广东省微纳加工技术与装备重点实验室,广东,广州,510006
- 作者简介：
- 基金信息：
- DOI：10.12052/gdutxb.190089
  CLC： TN492
- Online First：12 May 2020，
  
  Published：2020
- 稿件说明：
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衡园, 吴建成, 杨志军. 基于FPGA的控制算法定点化设计[J]. 广东工业大学学报, 2020, 37(3): 55-58.

Heng Yuan, Wu Jian-cheng, Yang Zhi-jun. A Fixed-point Design of Control Algorithm Based on FPGA[J]. 2020, 37(3): 55-58.
衡园, 吴建成, 杨志军. 基于FPGA的控制算法定点化设计[J]. 广东工业大学学报, 2020, 37(3): 55-58. DOI： 10.12052/gdutxb.190089.

Heng Yuan, Wu Jian-cheng, Yang Zhi-jun. A Fixed-point Design of Control Algorithm Based on FPGA[J]. 2020, 37(3): 55-58. DOI： 10.12052/gdutxb.190089.

摘要

运动控制算法在现场可编程逻辑门阵列(Field Programmable Gate Array

FPGA)上实现过程中

当数据类型由浮点转定点时

存在无法保证高精度的问题。为此使用simulink中的定点工具(Fixed-Point Tool)对算法内部各信号数据的范围进行分析

然后人为地对Fixed-Point Tool给出的建议位宽进行修正

从而使算法在保证较高精度的同时

也解决了采用统一较长位宽在FPGA上实现时造成的资源浪费问题。与传统的人为定义数据位宽相比

使用Fixed-Point Tool设置数据位宽

在输入数据范围发生变化时

能够更加灵活、动态地调整算法内部数据位宽。

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.

关键词

Keywords

references

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