【作者】 郑慧；

【导师】 李勇智； 陈定方；

【作者基本信息】 武汉理工大学 ， 机械电子工程， 2010， 硕士

【摘要】 Lab VIEW (Laboratory Virtual Instrument Engineering Workbench)是一种用图标代替文本创建应用程序的图形化编程语言,可以完成一套完整测试仪器的数据采集、分析、显示和存储功能,是目前国际上应用最广的数据采集和控制软件之一。GMM (Giant Magnetostrictive Material)是超磁致伸缩材料的简称,用其制作的进给驱动装置,具有微位移进给、高精度响应、驱动能力强以及响应速度快等优点,在超精密加工以及精密微进给领域中应用广泛。基于GMM的微进给装置是目前研究的热点,由于磁场、预压力等因素对GMM材料的磁致伸缩性是直接影响的,使得GMM微进给装置的设计与测试具有一定的难度。本文以智能材料和超精密加工技术为背景,总结了GMM微进给装置在超精密加工领域应用的优势和实际意义,论述了磁致伸缩效应及其机理、超磁致伸缩材料性能特点及其在微驱动器件上的应用,为超磁致伸缩微进给装置的研究和应用提供了必要的基础。GMM微进给装置结构设计的关键在于磁场结构设计、温控结构设计、预压力设计和传感器设计四个方面。本文研究了GMM棒设计参数、电磁线圈设计方案,设计并制作出位移自感知传感器。并将GMM微进给装置应用到刀架上,设计出GMM微进给刀架,并研究出微进给刀架中的测量切削力的八角环传感器。GMM微进给装置的工作特性与其主要工作条件预应力、驱动磁场密切相关,论文通过实验分析了GMM微进给装置中预压力与电流的特性、装置的加卸载回线和磁滞回线特性,分析了各因素对GMM准静态工作条件下特性曲线的应变值、线性度、重合度、磁滞的影响。论文针对GMM装置测试系统采用事件驱动的程序设计方法,实现了对GMM微进给装置的信号采集、分析、显示的实时操作。论文使用国家仪器公司(National Instrument)提供的软件平台(LabVIEW)和国产USB式的数据采集模块搭建了基于虚拟仪器的位移测量系统,并通过LabVIEW编程实现了多通道数据的采集和监测,并且实现了采集数据的分析和数据库存储。对微进给位移信号的测量证明了以虚拟仪器为基础的测量系统是可靠精确而且实用的。最后,论文通过实验对位移传感器和八角环测力仪装置进行了标定,获得了标定曲线和标定系数。更多还原

【Abstract】 LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is a kind of graphical programming language which use an icon instead of text to create applications, it can accomplish a complete set of test instrument data acquisition, analysis and display functions, which is one of the most widely used international data acquisition and control software.GMM (Giant Magnetostrictive Material) is the short of super-magnetostrictive material, with its production of micro-feed drive tool carrier,it has the advantage of micro-displacement feed, high-precision response, drive ability and fast response, which is widely used in the field of ultra-precision machining and precision micro-feed. GMM-based micro-feed device is a hot spots in current research. But as the direct impact of magnetic field, the pre-stress and other factors on magnetostrictive of GMM materials, it makes the design and test of GMM feed device has a certain degree of difficulty.In the background of intelligent materials and ultra-precision machining technology, this paper gave a summary of the advantages and practical significance of GMM micro-feed device in the field of ultra-precision machining applications. And it discussed magnetostrictive effect and its mechanism, super-magnetostrictive material performance characteristics and applications in micro-actuator device, which provided foundation for the necessary research and application of super-magnetostrictive actuator. The key of device of the GMM structural design of micro-feeding was the design of magnetic field structure, temperature-controlled structural, pre-stress and sensor. It studied the material design parameters of GMM and the electromagnetic coil design. On the control of temperature stability, it proposed a cooling structure with dual water-cooled chamber, through the insulation material which can inhibit heat transfer, it achieved an effective temperature control, ensured the stability of the output of the GMM.Operating characteristics of GMM feeding device is closely related to its main features of the working conditions of pre-stressed, driving the magnetic field. By Experiment, the paper analysised the pre-pressure of the device, current characteristics, loading and unloading loop, hysteresis loop, and analysised effects of various factors on the strain hysteresis curve, hysteresis and linearity in the GMM quasi-static working conditions. This paper also carried out calibration for equipment through experiments, which fitting the loaded curve and unloaded curve to obtain calibration curves and calibration coefficients.For the test system of GMM device, the paper established a comprehensive test platform based on a virtual instrument, which used multi-threaded program design method, it realized the real-time operation for signal acquisition, analysis and display of GMM Micro-displacement devices. The paper used a software platform (LabVIEW) that National Instruments (National Instrument) provided and domestic type of USB module for data acquisition, built up a displacement measurement system which based on the virtual instrument, and studied on the measurement system of this structure, achieved multi-channel collection and monitoring. And it realized database storage, data playback analysis of the data collection. Through measurement and research of signals of the power, it also proved that measurement system based on the virtual instrument is convenient, low-cost, practical, and reliable.更多还原