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基于ARM的步进电机控制系统 |
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在现代的工业控制系统中步进电机是一个重要的执行器件,其被广泛地应用于自动化工业控制系统和机电一体化的产品。在现代的大部分电子产品和工业产品中都是以步进电机为动力核心,如工业机器人、打印机、数控机床、绘图仪等。随着对产品的要求越来越高,对其控制也要求越来越高,以前的步进电机控制系统的控制能力无法满足现在的要求,因此,提出一种更高效、实用性更强的控制系统变得更加重要。
传统的工业控制大多数是采用8位单片机为控制内核,其价格便宜、设计简单,容易满足一般控制要求,但是该单片机存储空间小,外设资源较少,往往需要与PC机联合控制才能实现,这样带来的问题是实时性较差,人机交互较为复杂,操作麻烦等问题。采用功能较为强大的32位ARM为控制核心,把电源、电机控制板、步进电机和人机界面集成一体将形成一个更为强大的嵌入式一体化控制系统。其优势是控制性能强,实时控制强、人机界面友好、总体成本低、外设资源丰富、控制精度高,可以根据控制情况适时地调整控制参数以实现更优化控制。本文提出的是基于ARM7内核的LPC2131为控制核心的步进电机控制系统,实现对步进电机的驱动和速度准确控制,并具有很好的人机界面。
1 LPC2131概述
根据系统的实际需要和成本,该系统选择了NXP公司生产的基于LPC2131,它的CPU是ARM7TDMI,是一种高性能、低功耗、价格便宜的RISC处理器,具有丰富的片上外设资源,可在3.3 V的电压下工作,非常适合于嵌入式产品的开发。其主要特点如下:
(1)32位144引脚的ARM7TDMI内核;
(2)L/O电压是3.3 V,CPU工作电压是1.8 V;
(3)有16K字节的SRAM,8K的片内Flash;
(4)通过片内PLL可实现60 MHz的主频;
(5)对片内FLASH支持三种编程方式:ISP,IAP,JTAG在线仿真调试;
(6)具有两个低功耗模式:空闲和掉电模式;
(7)2路32位定时器,6路PWM,实时时钟和看门狗;
(8)具有2路工业标准的异步串口(UART)、高速I2C和2个SPI接口;
(9)8路数据转换器(ADC),转换时间可低至2.44 m;
(10)通过配置可有112个GPIO。
综上所述,LPC2131非常适合于该步进电机的控制系统的设计,并且具有很好的功能扩展性。
2 步进电机的工作原理
步进电机是一种将电脉冲转换为对应的角度或者位移的执行器件。如果电机没有超载,电脉冲信号的频率罗顿娱乐城和脉冲数决定步进电机的转速和电机的位移长度,负载的变化对其没有影响。也就是说只要给电机一个脉冲,那么电机就转一个对应的角度;按照步进电机的正转时序给脉冲,那么电机就正转,如果给的是反转时序,那么电机就反转。步进电机的种类很罗顿娱乐城多,按其结构可分为永磁式、激励式和反应式三种,按其相数分可分为单相、两相和多相三种。
2.1 步进电机的主要特征
(1)步进电机需要驱动电路才能转动,驱动电路产生驱动电脉冲信号,如果没有脉冲信号,步进电机静止不动,如果按照电机的驱动时序驱动电机,则电机按照一定的方向转动。电机转动的速度与脉冲的频率正比关系,不受负载影响。
(2)步进电机可以方便地实现瞬间启动、急速停止、正转、反转,并且速度响应特性好。
(3)步进电机没有累计误差,因为步进电机只有周期性的误差,完成一周以后误差清零。
(4)步进电机可以通过改变电脉冲信号的顺序实现改变其转动方向。
(5)当步进电机停止时可以实现自锁。
(6)步进电机的驱动信号一般要专门的控制电路产生,不能直接使用普通的交流或直流电源驱动。步进电机必须由双环形脉冲信号、功率驱动电路等组成驱动控制系统方可使用。
2.2 步进电机的测速办法
将驱动信号的电脉冲信号转换为角位移或者线位移,这样的测速优势是:
(1)过载性好:由于步进电机的转速不受负载的影响,即当负载加大时电机的速度保持不变。
(2)容易控制:由于步进电机是一步一步的运转,可以按角度来对其控制。
(3)整体结构简单:由于测速是将转速转换为电压,并传递到输入端实现闭环控制,整体结构减少了传统的机械部分和位置控制结构部分
推荐阅读:http://blog.xlzx.cn/index.php/108004/action_viewspace_itemid_332655.html |
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Mentor.Graphics.ADTB.V2.0.Linux
Mentor.Graphics.AMS.V2007.Linux
Mentor.Graphics.Capital.Capture.V2007
Mentor.Graphics.IC.Flow.V2007
Mentor.Graphics.DMS.V2007
Mentor.Graphics.BST.V2007.Linux.DVD
Mentor.Graphics.EXP.V2007.Linux.DVD
Mentor.Graphics.IND.v2007.DVD
Mentor.Graphics.PADS.v2007
Mentor.Graphics.Board.Station.Flow.2007.DVD
Mentor.Graphics.Expedition.Suite.V2007.DVD
...
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最新CAX/EDA/CFD/GIS/光学/化工/液压软件资源网
阳光软件园
所有软件资料都随时更新,急需软件可以去看看,基本上能找到你想要的!
http://www.ygrj.org
http://www.ygrj.info
e-mail:
even2one@vip.sina.com;even2one@sohu.com
将以上任意链接连接起来输入IE 窗口即可进入网站
下面是一部分软件,更多软件在我们的软件列表,如需要请到列表中去找!
ACTRAN v14.0 Win32_64.&.Linux-ISO 3DVD
Agilent.IC-Cap.v2008-ISO 1CD
AMESim/AMESet R9 1DVD(液压传动系统高级建模与仿真环境)
Analytical.Graphics.STK.Pro.v10.0 2DVD(先进的宇宙航天分析工具,专为航天和防御专业人员设计)
AnyCASTING.v4.0.Win32_64-ISO 1CD
ASAP Pro 2009 V1R1 1CD
ASAP 9CD(正版光源库)
Aspen Technology AspenONE Suite v8.6 Win7_8-ISO 3DVD
AutoForm R2 Plus v4.4 Final-ISO 1DVD
AVEVA Marine 12.1 SP2.2 1DVD(最先进的船舶设计软件)
AVL.Workspace.Suite.2013.0.Win32_64.&.Linux-ISO 3DVD
AVL CRUISE 2011.3 Win32_64-ISO 1CD
AVL.Fire.2013.0.Win32_64.&.Linux32_64-ISO 4DVD
AVL.SWIFT.v3.1.1-ISO 1CD
B&K PULSE v12.5-ISO 2CD(振动分析软件)
Bentley AutoPIPE Vessel (Microprotol) V8i v33.01.00.11 1CD
CAESAR II 2013 R1 v6.10 WinXP_7-ISO 1DVD(管道应力分析软件)
CAM-TOOL v4.0-ISO 1DVD(简/繁体中文版)
CarSim v8.1 Build 8141-ISO 1CD
CFDRC v2008-ISO 1CD
Code-V 10.4 SP1-ISO 1CD
Coade CADWorx 2014-ISO 1CD
CFturbo v9.2.5 1CD
Design Data SDS/2 v7.025 1CD
Deform.2D/3D.v10.2-ISO 1CD
DNV Phast v6.7-ISO 1DVD(石化事故后果模拟软件)
DNV Phast Risk v6.7-ISO 1DVD(原名Safeti, 现在更名为Phast Risk)
Drillbench Suite v6.1 1CD(钻井作业设计及规划软件)
Drillbench Cemcalc v3.9 1CD(动态固井设计分析软件)
ESI.SysWeld.2010.v12.0.Win32_64-ISO 1DVD
ESI Welding Simulation Suite(PAM-Assembly+Weld Planner) 2010.0 1DVD
ETA.VPG.v3.3.WiNNT2K 1CD(完全破解版)
FLOW-3D.v10.1.1.Win32_64.&.Linux32_64 2CD
Fraunhofer.SCAI.MpCCI.v4.0 1DVD
FRI Device Rating Program v2.3.3 1CD(美国精馏公司开发的化工软件,可用于塔板
(筛板, 浮阀)的严格的水力学计算)
GH-Bladed v3.67 1CD
GMI Imager v5.6 1CD
GMI PressCheck v2.5 1CD
GMI SFIB v5.4 1CD
GT-Suite 7.2 Build 1 Win32_64 & Lniux 1DVD(发动机模拟分析软件)
HTFS.Software.v7.1-ISO 1DVD
HTRI Exchanger Suite v6.0 SP3 Full-ISO 1CD
HydroComp.NavCad.2009.v9.05 1CD
HydroComp Propcad 2005 Full 1CD
HydroComp PropExpert 2005 Full 1CD
HyperMILL v2009.1 Multilanguage-ISO 1DVD
iMOLD v12 SP0-ISO 1CD(solidworks专用模具设计软件)
Intec.Simpack.v9.6.Win32_64.&.Linux32_64-ISO 4CD
Intergraph PDS v2011-ISO 1DVD
Intergraph.Tank.2014.v6.0-ISO 1CD
Jason v8.3 Win32-ISO 1DVD
JMatPro v7.0 1CD(材料性能模拟软件)
KBC Petro-SIM Suite v4.0 SP2-ISO 1CD
LensVIEW 2003.1-ISO 1CD
LightTools v8.1.0 RC1 Win32_64-ISO 2DVD(光学软件)
LMS Raynoise v3.0 1CD(大型声场模拟软件系统)
Lucidshape v1.72 1CD
MAGMASOFT v4.4-ISO 1CD(完全破解版,铸造仿真软件)
Maxsurf v13.01-ISO 1CD(计算机辅助船舶设计和建造软件)
MIDAS GTS v2.5.1 1CD
Neotec WELLFLO v8.3.0-ISO 1CD
NUMECA Fine v8.72 1CD
OLGA v7.1-ISO 1CD
OSLO Premium v6.44 1CD(光学软件)
Petrel v2010.2.2-ISO 1DVD
Petrel v2013.2.Win64 1DVD
Phoenics 2009-ISO 1CD
PipelineStudio v3.6.1.0-ISO 1CD
Plaxis v8.5 pro 1CD
PRG Paulin v2011 1CD
ProCAST 2013.0-ISO 1CD(全模块最新完全版)
Process.Systems.Enterprise.gPROMS.v3.71 1CD
PSS/E v33.40-ISO 1CD
PTV VISSIM v4.3-ISO
Pumpcalc v7.00-ISO(离心泵分析程序)
PVElite 2014 v16.00.00.000 Full-ISO 1CD
PVTSim v20.0-ISO 1CD
ReflectorCAD 1.5(ASAP的配套软件,专门用于车灯灯罩设计)
RSoft.Photonic.Component.Suite.2013.12.Win32_64 2CD(光学元件模拟软件)
RSoft.Photonic.Component.Suite.2013.12.Linux32_64 2CD
RSoft.System.Suite.2013.12.Win32_64 1CD(光通信设计套件)
Schlumberger Techlog 2013.3 Win64 1CD
ShipConstructor 2008 R2-ISO 1CD
SafeTech.FE-SAFE.v6.4.Win32_64 2CD(精度极高的疲劳分析软件)
SIMSCI.Pro/II v9.2-ISO 1DVD(流程模拟程序)
Space-E 4.3 1CD(简体中文版)
Stoner Pipeline Simulator(SPS) v9.9-ISO 1CD
Synergee gas v4.52 1DVD
Sysnoise v5.6.WinNT2k 2CD(噪声分析软件)
TFC.Essential.Macleod.v9.7.0 1CD(光学薄膜设计软件)
TruckSim v8.1-ISO 1CD
TracePro v7.04-ISO 1CD(光学机构仿真软件)
VANTAGE PDMS v12.0 SP6-ISO 1DVD
VMGSim.v8.0.Build42 1CD
Winsim.Design.II.v9.31 Working 1CD
WorkNC G3 v21.0-ISO 1CD(多语言版)
ZEMAX v2009.06.09 1CD
华铸CAE 10.0 铸钢 1CD
压力容器计算软件SW6-2011 单机版 1CD
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