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Self-calibration and Compensation of Setting Errors for Surface Profile Measurement of a Microstructured Roll Workpiece 被引量:3
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作者 GAO Wei XU Bin +2 位作者 TAKEISHI Toshiki SHIMIZU Yuki ITO So 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第1期14-22,共9页
Microstructured roll workpieces have been widely used as functional components in the precision industries. Current researches on quality control have focused on surface profile measurement of microstructured roll wor... Microstructured roll workpieces have been widely used as functional components in the precision industries. Current researches on quality control have focused on surface profile measurement of microstructured roll workpieces, and types of measurement systems and measurement methods have been developed. However, low measurement efficiency and low measurement accuracy caused by setting errors are the common disadvantages for surface profile measurement of microstructured roll workpieces. In order to shorten the measurement time and enhance the measurement accuracy, a method for self-calibration and compensation of setting errors is proposed for surface profile measurement of microstructured roll workpieces. A measurement system is constructed for the measurement, in which a precision spindle is employed to rotate the roll workpiece and an air-bearing displacement sensor with a micro-stylus probe is employed to scan the microstructured surface of the roll workpiece. The resolution of the displacement sensor is 0.14 nm and that of the rotary encoder of the spindle was 0.15r~. Geometrical and mathematical models are established for analyzing the influences of the setting errors of the roll workpiece and the displacement sensor with respect to the axis of the spindle, including the eccentric error of the roll workpiece, the offset error of the sensor axis and the zero point error of the sensor output. Measurement experiments are carded out on a roll workpiece on which periodic microstructures are a period of 133 i^m along the circumferential direction. Experimental results demonstrate the feasibility of the self-compensation method. The proposed method can be used to detect and compensate the setting errors without using any additional accurate artifact. 展开更多
关键词 measurement profile setting error SELF-CALIBRATION COMPENSATION microstructure roll workpiece
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Influence of Setting Error of Tool on Tooth Profile and Contact Point of Face Gear Drive 被引量:2
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作者 李晓贞 朱如鹏 +1 位作者 李政民卿 李发家 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2014年第4期370-376,共7页
In order to analyze the influence of setting error of tool on both tooth profile and contact characteristic of orthogonal face gear drive,the coordinate systems with and without setting error are established.Moreover,... In order to analyze the influence of setting error of tool on both tooth profile and contact characteristic of orthogonal face gear drive,the coordinate systems with and without setting error are established.Moreover,the equations of tooth profile and contact points of face gear drive are derived by envelope principle.According to the equations,the change of tooth profile and the contact points position on face gear are analyzed.The tooth surface and contact points are obtained by numerical simulation.Results show that the tooth profile and contact characteristic of face gear drive are not sensitive to the setting error of tool. 展开更多
关键词 face gear setting error tooth profile contact characteristic
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Density Functional Theory Study of the Interaction between Thymine and Luteolin 被引量:1
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作者 王晓岚 蔡皖飞 +2 位作者 郑妍 李来才 田安民 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第3期727-732,共6页
The density function B3LYP method has been used to optimize the geometries of the luteolin, thymine and lute- olin-thymine complexes at 6-31+G* basis. The vibrational frequencies have been studied at the same level ... The density function B3LYP method has been used to optimize the geometries of the luteolin, thymine and lute- olin-thymine complexes at 6-31+G* basis. The vibrational frequencies have been studied at the same level to ana- lyze these seventeen complexes, respectively. Theories of atoms in molecules (AIM) and natural bond orbital (NBO) have been utilized to investigate the hydrogen bonds involved in all the systems. The interaction energies of the complexes corrected by basis set superposition error are between -93.00-76.69 kJ/mol. The calculating results indicate that strong hydrogen bonding interactions have been found in the luteolin-thymine complexes. 展开更多
关键词 density functional theory hydrogen bond basis set superposition error THYMINE LUTEOLIN
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