共查询到17条相似文献,搜索用时 437 毫秒
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直线度误差分离方法的误差分析 总被引:4,自引:0,他引:4
本文在研究精密和超精密加工技术的发展对直线度误差分离技术所提出的新要求的基础上,定量分析了传感器初始对准误差、忽略摆角误差和传感器漂移特性差异在时域和频域直线度误差分离方法中造成的误差,同时指出了频域方法中权系数对测量误差的放大作用。 相似文献
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时域二点法和三点法直线度EST的误差分析 总被引:10,自引:2,他引:8
时域二点法和三点法直线度EST的误差分析*张镭张玉(东北大学沈阳110006)0引言自八十年代初,日本学者田中等人首次将误差分离技术(EST)引入直线度误差测量中以来〔1、2〕,该项研究已成为国内外学者的重要前沿课题。尤其是时域EST避免了频域法所必... 相似文献
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使用短基准的超精密长导轨直线度误差测量方法 总被引:6,自引:2,他引:4
在超精密加工与检测技术中,高精度长导轨直线度误差的测量与补偿技术一直是一个研究重点。在系统研究现有各种导轨直线度误差测量方法的基础上,提出一种使用短基准的导轨直线度误差测量方法,将长导轨直线度误差的测量问题分解为具有一定重叠区域的数段较短导轨直线度误差的测量问题。直接利用超精密直线度物理基准测量各段导轨直线度误差,通过将各段导轨直线度误差拼接起来,重构出长导轨的直线度误差。利用空间坐标变换关系建立基于最小二乘法的直线度误差测量算法,以及相对机械运动误差对测量结果影响的数学模型,分析研究重叠区域二次采样点的匹配误差,以及测量误差、采样频率等因素对重叠区域长度选择的影响规律。对长550 mm的气浮导轨进行实际测量试验,仿真与测量试验表明上述方法简单实用,可操作性强。 相似文献
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高精度零件的直线度测量(例如理石平尺、精密导轨等),其测量误差可通过两次测量,利用误差分离的方法消除测量基准的误差影响,本文通过直线度检查仪对理石平尺的测量实例来探讨一下如何进行误差分离法检测直线度,以及平尺两平面的平行度。本文将以平尺的测量为例介绍如何利用误差分离技术测量高精度零件的直线度方法探讨。 相似文献
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Measurement of multi-degree-of-freedom error motions of a precision linear air-bearing stage 总被引:2,自引:0,他引:2
Wei Gao Yoshikazu Arai Atsushi Shibuya Satoshi Kiyono Chun Hong Park 《Precision Engineering》2006,30(1):96-103
This paper describes the measurement of straightness error motions (vertical straightness and horizontal straightness) and rotational error motions (pitch, yaw and roll) of a commercial precision linear air-bearing stage actuated by a linear motor. Each of the error motions was measured by two different methods for assurance of reliability. The stage was placed in the XY-plane and moved along the X-direction. The pitch error and yaw error, which were measured by an autocollimator and the angle measurement kit of a laser interferometer, were about 8.7 and 1.6 arc-s, respectively, over a travel of 150 mm with a moving speed of 10 mm/s. The roll error was measured by the autocollimator through scanning a flat mirror along the X-direction. The second method for roll error measurement was to scan two capacitance-type displacement probes along the flat surface placed in the XZ-plane. The two probes with their sensing axes in the Y-direction were aligned with a certain spacing along the Z-axis. The roll error can be obtained by dividing the difference of the outputs of the two probes by the spacing between the two probes. The roll error was measured to be approximately 11.8 arc-s over the 150 mm travel. The horizontal straightness error and the vertical straightness error (Y- and Z-straightness errors) were measured by using the straightness measurement kit of the laser interferometer. The second method for straightness measurement was to scan the flat surface with a capacitance-type displacement probe. The horizontal and vertical straightness errors of the stage over the 150 mm travel were measured to be approximately 207 and 660 nm, respectively. 相似文献
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Yong-hong Zhang Li-hua Wang Chun-xiang Ma Qi Wu De-jin Hu 《The International Journal of Advanced Manufacturing Technology》2008,36(3-4):305-314
In this paper, an online measurement and error compensation system for curve grinding based on pattern recognition was presented
and verified by experiments. The measurement system organization and its principle of operation were introduced in detail.
The work piece and grinding wheel image were sampled at certain positions to avoid spark influence. In order to increase system
resolution, images were sampled only at local areas of the work piece and grinding wheel. A discrimination technology based
on a circular tolerance zone was proposed which can solve the problem of local image edge comparison. For image de-noising,
a local threshold algorithm was applied to determine new wavelet coefficients. Furthermore, a two-step edge detection method
was used to realize sub-pixel precision. Finally, a series of experiments were carried out to examine the detection precision
of the image measurement system and its influencing factors. From experiments, it can be said that the proposed method in
this paper is effective, and its detection precision is much better than traditional methods. 相似文献
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The error separation technique is widely adopted for many machine tool performance tests. The most common applications include roughness measurement, straightness measurement and spindle measurement. In this paper, two error-separation technologies, the straightness reversal technique and the semi-reversal technique, are developed. The straightness reversal technique can be adopted for the straightness measurement of a linear axis. The semi-reversal technique can be adopted for setting error separation in a contouring test and in the spindle error measurement. In this paper, mathematical models have been developed. In order to verify the possibility of the semi-reversal technique, related experimental work has been carried out. 相似文献
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小型精密X-Y工作台误差的理论分析及补偿 总被引:5,自引:1,他引:4
从理论上分析了小型精密X-Y工作台的各种误差。针对这些误关,给出一些确实可行的措施来减小机械系统的误差;用软件对系统的几种误差进行了补偿。在此基础上,讨论了工作台开环系统及闭环系统的精度。提出了测量导轨直线性误差的新方案,使测量方法的原理误差降低到完全可以忽略不计的程度。 相似文献
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从理论上分析了小型精密x-Y工作台的各种误差。针对这些误关,给出一些确实可行的措施来减小机械系统的误差;用软件对系统的几种误差进行了补偿。在此基础上,讨论了工作台开环系统及闭环系统的精度。提出了测量导轨直线性误差的新方案,使测量方法的原理误差降低到完全可以忽略不计的程度。 相似文献