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第三届国际仪器科学技术学术研讨会

作者： ZHAO Wei-qian WANG Zhi-bo XUE Zi TAN Jiu-bin Institute of Ultra Precision Optical & Electronic Instrument Engineering Harbin Institute of Technology Harbin 150001 China

The analyses of the effect of influence factors on cylindricity measuring instruments(CMI) measurement accuracy indicates that the reference guidance movement error is the technical bottleneck which h

关键词： error compensation three beams monitoring guidance method cylindricity straightness

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2-D Measuring System with Nanometer Resolution and Long Range

2-D Measuring System with Nanometer Resolution and Long Rang...

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第三届国际仪器科学技术学术研讨会

作者： QI Yong-yue ZHAO Mei-rong LIN Yu-chi State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University 300072 China

A new laser displacement measuring system with nanometric resolution has been developed. Optical system with 8 times optical path difference is designed. The following materials and methods are utiliz

关键词： nano-measurement laser interferometer coupled difference error compensation

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FEMTOSECOND LASER TWO-PHOTON MICROFABRICATION CONTROL AND MONITORING SYSTEM BASED ON VIRTUAL INSTRUMENTS

FEMTOSECOND LASER TWO-PHOTON MICROFABRICATION CONTROL AND MO...

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2006年中国机械工程学会年会暨中国工程院机械与运载工...

作者： GAO Guohua, ZHU Yu, DUAN Guanghong, ZHANG Ming Department of Precision Instrument & Mechanology, Tsinghua University, Beijing 100084, China

Femtosecond (fs) laser Two-photon Microfabrication is a new true 3D microstructure fabricating method with sub-micron resolution power based on the characteristic of fs laser that ultrahigh peak inten

关键词： Femtosecond laser two-photon microfabricat-ion control and monitoring error compensation virtual instru-ments.

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误差补偿提高机床精度研究的回顾及展望

机械技术史

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机械技术史 1998年 508-509页

作者：张卧波济南职工科技大学

通常,提高机床精度有两种基本方法:误差防止和误差补偿。误差防止是试图通过设计和制造途径消除可能的误差源。误差补偿涉及机床误差的测量以及对误差作用的纠正。

关键词： Machine Accuracy error compensation

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Prediction of Grinding Granularity Based on the Combination of Grey Model and Neural Network

Prediction of Grinding Granularity Based on the Combination ...

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第30届中国控制与决策会议

作者： ZHANG Yong LIU Xuqiang Electronic and Information Engineering University of Science and Technology Liaoning

The beneficiation process is an important production process of smelting economic indicators,and a process of dressing production grinding and classification plays a vital role in the beneficiation process,the grinding particle size is an important index of grinding production in the production process,not only affects the concentrate grade and recovery rate and subsequent operation.The key factors in the grinding process.The grinding production process is a very complex control system.There are many interference factors,large inertia and serious nonlinearity.The prediction cost is high and the prediction error is very large.Based on the analysis of the structure and characteristics of GM（1,N） grey prediction model,the grey prediction model is applied to predict the grinding granularity and the prediction error is compensated by neural network.The experimental results show that the predicted values obtained by using the constructed grey model and the neural network for error compensation are closer to the actual value.Meanwhile,the learning time is short,the amount of data needed is small,and the running speed is fast,which can meet the requirements of subsequent processes.

关键词： Grinding granularity GM（1,N） model neural network error compensation

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An Universal Modeling Method for Enhancing the Volumetric Accuracy of CNC Machine Tools

An Universal Modeling Method for Enhancing the Volumetric Ac...

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第十届国际制造工程与管理会议

作者： FAN Jin-wei GUAN Jia-liang WANG Wen-chao LUO Qi ZHANG Xiao-long WANG Ling-yu(Department of Mechanical and Applied Electronic Engineering BeijingPolytechnic University Beijing 100022 China)

＜正＞ Volumetric error modeling method is an important technique for enhancement the accuracy of CNC machine tools by error compensation. In the research field, the main question is how to find an universal kinematics modeling method for different kinds of NC machine tools. Multi-body system theory is always used to solve the dynamics problem of complex physical system. But till now, the error factors that always exist in practice system is still not considered. In this paper, the accuracy kinematics of MBS （multi-body system） are developed by adding the movement error items and the positioning error items for every couple of adjacent bodies. After make an analysis for different kinds of NC machine tools we can find that NC machine tools can be looked as a kind of special MBS. It’s main construction only contains two movement branch, the one is from base part to workpiece and the other is from base part to cutter. So an universal volumetric error modeling method and the error analysis method for NC machine tools can be built in this paper based on MBS theory. The essential condition for precision machining is derived through mathematics equations and the concept of ICCP （inverse changed cutter path ） and ICNI （inverse changed NC instruction ） are presented in this paper. The numerical solution methods for ICCP and ICNI are also given in this paper which can be directly used to enhance the machining accuracy of NC machine tools. In order to verifying the above works, the double frequency laser interface detecting instrument of RENISHAW is used to measure the error parameters of the MAKING 3-axis NC machine tools and the softwares are developed using C++ developing language to simulate the cutter trail under different kind conditions in the computer. Latterly the standard work parts are selected to be machined on the MAKINO 3-axis NC machine tools before and after use the above mentioned error compensation method respectively. The simulation and experiment results show that the volumetric error modeling method is eff

关键词： error compensation NC machine multi-body system

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A Method of Coarse Alignment for FOG Based Inertial Platform System Using Rotation Modulation

A Method of Coarse Alignment for FOG Based Inertial Platform...

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第30届中国控制与决策会议

作者： Zhou Yuan Wang Ting Beijing Institute of Aerospace Control Device

A platform inertial platform system(IPS) is a kind of independent navigation system.A fiber optic gyro(FOG)based IPS can stabilize its inertial measurement unit(IMU) in inertial space using its FOG readouts,and calculate its carrier’s real-time displacement and velocity using its accelerometer readouts.Alignment is the initialization process of the IPS.During the coarse alignment of the FOG based IPS,the instrument errors,random noise and base vibration can cause decline of the alignment accuracy.To improve the precision of coarse alignment,the IMU rotation modulation is used to suppress the errors of inertial instruments by utilizing the equivalent integration process contained in the averaging computation.On the stationary base,calculate the attitude matrix of the rotating IMU in each sampling period,and averaging computation can compensate the errors caused by biases of inertial instruments.When the carrier is in vibration condition,the alignment coordinate frame(CF) is introduced to assist the rotation modulation.Carry out the attitude updating within the alignment CF in each sampling period to correct the estimated attitude matrix,and the rotation modulation based method can still improve the precision of coarse alignment in vibration condition.

关键词： Inertial Platform System Coarse Alignment Rotation Modulation error compensation

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