The Design Of Displacement Self-induced Of Micro-feed Device Driven By GMM And Research On The Measuring System

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.