基于FPGA的数控折边机控制系统的设计与实现.pdf

浙江理工大学
硕士学位论文
基于FPGA的数控折边机控制系统的设计与实现
姓名:胡一枫
申请学位级别:硕士
专业:测试计量技术与仪器
指导教师:周砚江
20091218
基于FPGA的数控折边机控制系统的设计与实现
Design and Realization of Control System Based on FPGA
for Numerical Control Folding Machine
硕土学位论文
摘要
折边”是皮革加工的一项基本工艺,折边机对皮革产品的一致性、美观性及折边生产
效率起着重要作用。目前,国内外对折边机的研究主要集中在上胶控制,自动上胶折边机、
热熔折边机等。折边机在一定程度实现了上胶的智能控制,但现有折边机的折边运动控制仍
然通过机械运动机构驱动和人工操作共同完成而数控折边机开发和研究在国外尚未见报道。
本文提出了并实現了一种基于FRGA( Field Programmable Gate Array)的数控折边机控制系
统,该系统采用VHDL( Very High Speed Integrated Circuit Hardware Description)语言层次
化、软硬件协同设计和模块化的程序设计方法,缩短了开发周期,增强了系统的可靠性,便
于系统的升级。
随着徵处理器的发展,嵌入式技术在复杂工业控制中的应用日益广泛,基于FPGA-MCU
的控制系统技术逐渐成为工业控制技术发展的方向。折边机控制系统是一种典型的机电控制
系统,它是由不同性质、不同控制对象组合而成的多参数系统,既有多轴运动和位置控制,
又有流量、温度的过程控制,是一个较为复杂的机电控制系统。若采用单片机为核心的微机
控制系统,由于其程序的顺序控制复杂,控制对象多,使得CPU的工作负担过重,影响了
系统实时性和稳定性。本文提出了一种ARM-FPGA架构的嵌入式工业控制系统的软硬件方
案,ARM处理器负责人机接口界面以及与FPGA通讯,FPGA则负责多路/O输出、温度检
测和极限位置检测,其中IO输出主要包括:多轴联动控制、存储器读写控制、流量控制、
键盘扫描和温度信号采集等。在本控制系统中,FPGA占有重要地位,其嵌入式软核处理器
( Nios I)用于完成与ARM通信、数据处理以及各功能模块的任务调度,并凭借其较强的
处理能力、灵活的配置方式使系统设计更为简单、灵活。
本课题的数控折边机控制系统以FPGA为控制核心,具有板级设计简单、并行处理能力
强、可移植性好等特点,不仅简化了外围集成电路和数据采集接口,增强了控制系统内部的
数据交互能力,提高了折边机的自动化水平,也促进了折边机的数字化发展。
关键词:数控折边机;FPGA:;自动化;VHDL: NOS I
硕士学位论文
Design and Realization of the Control System Based on FPGA for the
Numerical Control of Folding Machine
Abstrac
Folding"is a basic craft in leather processing and the folding machine is one of the leather
products processing equipments. The automation of folding machine plays an important role in the
consistency of leather products, aesthetics and efficiency of the machine. Researches of the control
system of folding machine recently focus on the glue-supply control, automatic lue-provided
folding machine and hot-melt folding machine for automation in a certain area of the lue supply
The control of the folding is still completed by mechanical motion mechanism coordinated with
manual operation and research of the numerical control and au omatic folding machine hasn't been
reported in foreign countries. A control system for numerical control folding machine based on
FPGA which uses hierarchical VHDL(Very High Speed Interated Circuit Hardware
Description)language, software and hardware co-design and modular programming method is
presented in this paper. This system created has the features of short design cycle, high reliability
of the system and convenient for updating the system
With the development of Microprocessor, applications of the embedded technology have been
increasing in complex industrial control and the technology for control system based on
FPGA-MCU is gradually becoming the new field of the industrial control systems. There are
multiple requiremen s of different properties and control items for the control system of the folding
machine to control the movements of multiple axes, the temperature and hydro-flow. These
requirements constitute a typically complex electromechanical control system. The former design
adopting traditional control system for such a complex electromechanical control system absents
the control property of real time and the working stability because of the overweight of CPU and
multi-tasks. An embedded industrial control system ARM-IPPGA structure promoted in this paper.