基于PLC和触摸屏的数控钻床控制系统

根据钻床加工的需求,设计一种数控钻床控制系统,系统采用PLC与触摸屏结合的自动控制.介绍钻床的加工要求与工作原理,控制系统的软件设计,以及人机界面的设计实现过程.     

PCB高速数控钻床独立运动控制器的研究与设计

分析了国内外PCB高速数控钻床运动控制系统特点和技术现状,结合PCB钻孔实际加工要求,提出一种性能先进、稳定可靠的独立运动控制器。     

基于ROS的智能代步车嵌入式运动控制系统

针对目前智能代步车运动控制系统功耗高、体积大和开发成本高和工作量大等不足,提出一种基于机器人操作系统(Robot Operating System,ROS)的智能代步车嵌入式运动控制系统。该运动控制系统将ROS移植到arm嵌入式板卡,将arm作为中央处理器,运用ROS中的导航功能包实现智能代步车的地图建立、路径规划、室内外自主导航、运动控制等功能,最后通过仿真实验验证了该运动控制系统的可行性。     

基于Visual C＋＋数控插补的动态控制分析与实现

分析了数字积分法数控插补原理;以圆弧数字积分法插补为例,在VisualC＋＋开发平台下编制了数控插补运算程序,实现了插补的可视化动态控制仿真,完成了对数控机床运动控制模块的开发。     

DSP控制卡在高速数控雕铣机中的研究实现

分析了传统数控雕铣机运动控制系统的缺陷，针对基于DSP＋FPGA运动控制卡的特点，开发了一种高速度、高精度、高效率和高可靠性的数控雕铣机运动控制系统。同时将伺服驱动脉冲发生模块、码盘反馈信号处理模块、插补命令FIFO缓冲区、辅助命令FIFO缓冲区、状态缓冲区、DSP外部扩展存储区都集成在一块FPGA芯片上，这样大大地减少了外围电路的设计工作量，并增强了系统的可靠性和稳定性。谊系统已成功应用于8．5kw四轴数控雕铣机控制系统中，并且应用效果达到了设计目标。     

基于运动控制的纤维缠绕机控制系统设计

五轴联动数控纤维缠绕机包括收线系统、伺服电机、引导小车和控制系统.缠绕机控制系统采用双CPU结构模式和位置控制方法,并结合缠绕机实现纤维缠绕的动作要求编制10程序,基于PMAC(多轴运动控制卡)的主从式控制系统的软件结构、通信方式以及PVT插补模式等相关问题得到详细讨论.     

数控皮革裁剪机裁割运动控制系统研究及其实现

针对当前数控单层皮革裁剪机不适用于多层皮革的自动裁割,且效率较低,难以推广等问题,提出了多层数控皮革裁剪机裁割运动控制系统的软硬件总体结构设计方案;该方案根据多层数控皮革裁剪机的工作原理及其裁刀的运动特点,采用切向智能跟随运动控制插补算法,并基于嗣高运动控制器的控制平台,以VC++为软件开发工具,实现了其运动控制系统软件的开发,该运动控制系统在多层皮革裁剪机上试运行中,刀具切割皮革平滑,速度快,系统软件和硬件设计合理可行,具有一定的工程应用价值.     

基于Java的数控冲床系统的研究与开发

提出了一种基于Java语言的数控冲床控制系统的设计方案。方案采用JavaSWT/Jface搭建操作系统界面,利用监听器对界面事件进行监听和处理;利用JNI在Java程序中调用运动控制卡中的库函数实现系统对机床加工的状态监视和运动控制。该系统可运行于普通PC上,PC机作为上位机对系统进行任务管理,而运动控制卡实时完成上位机发出的任务请求。利用Java作为开发工具,不仅能满足一般厂商对于数控冲床系统的要求,且系统具有开发周期短、稳定性好、易于拓展等优势。     

基于ARM Cortex-M3的运动控制系统与算法设计

提出一种基于ARM Cortex-M3为核心的运动控制器的新运动控制方案,并给出关键算法.控制系统采用“ARM运动控制器+PC机”的结构.PC机实现界面功能以及部分预处理功能,运动控制器则完成关键的算法与处理.在数控冲孔机控制上进行的应用表明,该系统具有较高的可行性.     

基于AutoCAD2002的数控切割系统

本文介绍了运动控制卡MPC02的功能结构和主要特性,提出了采用MPC02开发基于AutoCAD2002的数控火焰、等离子两用切割控制系统.该系统不仅实现了加工中暂停、继续、沿原轨迹返回、调速等功能,而且充分利用AutoCAD2002强大的绘图能力和开放性,开发出良好的人机界面,切割过程无需编程,操作方便,真正实现了CAD/CAM一体化.     

虚拟轴数控机床刀具运动状态的实时规划

提出了虚拟轴数控机床的递阶控制方法, 并着 重介绍了递阶控制的第一级——刀具运动状态实时规划所涉及的切削路径生成、刀具运动路 径计算和刀具运动姿态规划三个关键问题的求解过程, 为虚拟轴机床数控系统的研究开发奠 定了必要的理论与技术基础．     

Impedance model force control using a neural network-based effective stiffness estimator for a desktop NC machine tool

In manufacturing industries of metallic molds, various NC machine tools are used. A desktop NC machine tool with compliance control capability has been already proposed to automatically cope with the finishing process of an LED lens mold. The NC machine tool can control the polishing force acting between an abrasive tool and a workpiece, where the force control method developed is an impedance model force control. The most important gain, which gives a large influence to the stability, is the desired damping of the impedance model. Ideally, the desired damping is calculated from the critical damping condition of the force control system in consideration of the effective stiffness. The effective stiffness means the total stiffness including the characteristics composed of the NC machine tool itself, force sensor, tool attachment, abrasive tool, workpiece, zig and floor. One of the serious problems is that the effective stiffness of the NC machine tool has undesirable nonlinearity, so that it may destroy the stability of the force control system. In this paper, a systematic tuning method of the desired damping in the control system is considered by using neural networks, where the neural networks acquire the nonlinearity of effective stiffness. It is confirmed that the impedance model force controller with the neural network-based (NN-based) stiffness estimator allows the NC machine tool to achieve a high quality finished surface of an LED lens mold with a diameter of 3.6 mm.     

Realization of STEP-NC enabled machining

A STEP-compliant CNC machine tool that demonstrated a G-code free machining scenario is presented. The aim of this research is to showcase the advantages of, and evaluate, STEP-NC—a new NC data model—by implementing it in a legacy CNC system. The work consists of two parts: retrofitting an existing CNC machine and the development of a STEP-compliant NC Converter called STEPcNC. The CompuCam's motion control system is used for retrofitting the machine, which is programmable using its own motion control language—6K Motion Control language and capable of interfacing with other CAPP/CAM programs through languages such as Visual Basic, Visual C++ and Delphi. STEPcNC can understand and process STEP-NC codes, and interface with the CNC controller through a Human Machine Interface. It makes use of STEP-NC information such as “Workplan”, “Workingstep”, machining strategy, machining features and cutting tools that is present in a STEP-NC file. Hence, the system is truly feature-based. The Application Interpreted Model of STEP-NC has been used.     

数控车削零件的仿真加工

本文介绍了数控车削零件的仿真加工技术。它采用CAXA软件生成NC代码,利用CAXA软件的CAM功能进行数控仿真,加载到VNUC仿真软件的计算机模拟机床里,模拟真实机床运动,最后通过数据线将G代码传输到实际机床,形成＂虚拟＋现实＂的仿真模式。这种模式弥补了CAD/CAM软件数控仿真的不足,将虚拟的机床运动与实际的数控操作融为一体,可使用户既掌握数控铣削加工的基本原理,又掌握数控系统操作的基本技能。     

台达20PM PLC在精密冲压成型机上的应用

本文主要介绍一种精密冲压成型机的生产工艺和电气控制系统,以及通过台达运动型控制器20PM的电子凸轮功能配合台达高性能ASD—A＋伺服驱动器的控制系统实现方式。台达20PM运动型PLC具有强大而灵活的电子凸轮功能,如凸轮曲线自动生成、动态修改、偏移、平滑等,为该精密冲压成型机的研发提供了良好的技术条件,同时单虚拟主轴与多电子凸轮从轴配合的运动控制模式为多轴协调运动控制提供了一种新的解决方案。     

基于MCX314控制器的数控机床运动控制系统

分析了传统数控机床控制系统的缺陷，并针对MCX314运动控制器的特点，开发了一种高速度、高精度、高效率和高可靠性的数控机床运动控制系统。该系统已成功应用于某数控机床控制系统中，并且应用效果达到了设计目标。     

Microprocessor-based controls for drilling — retrofitting aspects

This paper considers the updating of NC (numerical control) machine tools with control systems demonstrating modern features. To illustrate such machine tool retrofitting, the paper describes the structure of microprocessor-based hardware and software which was developed to achieve improved control of a first generation NC drilling machine.     

Time-optimal tool motion planning with tool-tip kinematic constraints for robotic machining of sculptured surfaces

A time-optimal motion planning method for robotic machining of sculptured surfaces is reported in this paper. Compared with the general time-optimal robot motion planning, a surface machining process provides extra constraints such as tool-tip kinematic limits and complexity of the curved tool path that also need to be taken into account. In the proposed method, joint space and tool-tip kinematic constraints are considered. As there are high requirements for tool path following accuracy, an efficient numerical integration method based on the Pontryagin maximum principle is adopted as the solver for the time-optimal tool motion planning problem in robotic machining. Nonetheless, coupled and multi-dimensional constraints make it difficult to solve the problem by numerical integration directly. Therefore, a new method is provided to simplify the constraints in this work. The algorithm is implemented on the ROS (robot operating system) platform. The geometry tool path is generated by the CAM software firstly. And then the whole machine moving process, i.e. the feedrate of machining process, is scheduled by the proposed method. As a case study, a sculptured surface is machined by the developed method with a 6-DOF robot driven by the ROS controller. The experimental results validate the developed algorithm and reveal its advantages over other conventional motion planning algorithms for robotic machining.     

双焊枪自动焊接机数控系统设计

针对散热器多T型管相贯线的连续焊接问题,提出了一种基于PC机和6K运动控制器的双焊枪自动焊接机数控系统。采用"PC+多轴控制器"的上下位机控制结构,上位机采用VisualBasic编制控制程序,实现系统的管理、控制功能。下位机采用6K4控制器独有的6000运动语言开发底层的伺服驱动程序,并可由上位机通过以太网接口调用。整个系统能够完成各轴状态实时显示、故障自动诊断、焊接路径规划、焊接参数调节等任务。     

Bilinear modelling,control and stability of directional drilling

This paper proposes an approach for the attitude control of directional drilling tools for the oil and gas industry. A bilinear model of the directional drilling tool is proposed and it characterises the nonlinear properties of the directional drilling tool more accurately than the existing linear model, hence broadens the range of adequate performance. The proposed bilinear model is used as the basis for the design of a Bilinear Proportional plus Integral (BPI) controller. The stability of the proposed BPI control system is proven using stability notions for LTI and LPV systems. The transient simulation results show that the proposed BPI controller is more effective, robust and stable for the attitude control of the directional drilling tool than the existing PI controller. The proposed BPI controller provides improved invariant azimuth responses and significantly reduces the adverse effects of measurement delays and disturbances with respect to stability and performance of the directional drilling tool.