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SVM-based Identification and Un-calibrated Visual Servoing for Micro-manipulation 被引量:3
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作者 Xin-Han Huang Xiang-Jin Zeng Min Wang Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PRC 《International Journal of Automation and computing》 EI 2010年第1期47-54,共8页
This paper presents an improved support vector machine (SVM) algorithm, which employs invariant moments-based edge extraction to obtain feature attribute. A heuristic attribute reduction algorithm based on rough set... This paper presents an improved support vector machine (SVM) algorithm, which employs invariant moments-based edge extraction to obtain feature attribute. A heuristic attribute reduction algorithm based on rough set's discernible matrix is proposed to identify and classify micro-targets. To avoid the complicated calibration for intrinsic parameters of camera, an improved Broyden's method is proposed to estimate the image Jacobian matrix which employs Chebyshev polynomial to construct a cost function to approximate the optimization value. Finally, a visual controller is designed for a robotic micromanipulation system. The experiment results of micro-parts assembly show that the proposed methods and algorithms are effective and feasible. 展开更多
关键词 micro-assembly support vector machine part identification Broyden method visual servoing
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Application of Heating Type Micro-Assembly Device in Two-Photon Micromachining 被引量:1
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作者 Jintao Xia Afei Ding +4 位作者 Pan Wang Hang Wang Yinwei Gu Weidong Tao Gang Wang 《Photonic Sensors》 SCIE EI CSCD 2021年第3期362-370,共9页
The development of micro-fabrication and micro-assembly technology is indispensable for the future manufacturing of miniaturized,functional,and integrated devices.This paper proposes a planar micro-assembly technology... The development of micro-fabrication and micro-assembly technology is indispensable for the future manufacturing of miniaturized,functional,and integrated devices.This paper proposes a planar micro-assembly technology to make the assembly of micro-objects easier.Firstly,delicate three-dimensional(3D)structures were fabricated on glass and silicon slice substrates using femtosecond laser two-photon polymerization(2PP).Secondly,transparent fluorescent scintillation ceramic powder,referred to as fluorescent powder,was assembled using a laboratory-made 3D moving heating micro-operator into a microstructure on a glass substrate,and this device is used to assemble the graphene powder into the microstructure on the silicon slice substrate.The fluorescence spectra and Raman spectra characterizations of the fluorescent powder and graphene powder in the microstructure were carried out by using excitation light at 405 nm and 532 nm,respectively.According to the above results,it can be concluded that the powder properties of the fluorescent powder and graphene powder assembled into the microstructure were not changed.The experimental device could not only assemble many micron-sized powder materials into hollow microstructures of arbitrary shape but also joined microstructures with different materials and characteristics to form a complex hybrid microstructure system. 展开更多
关键词 Two-photon polymerization micro-assembly FLUORESCENCE GRAPHENE
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Ionic Liquid Mediated Synthesis of Lath Shaped CuO Micro-Assembles as Extremely Stable Anode Material for Lithium-Ion Batteries 被引量:3
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作者 Man Wang Ruguang Ma +3 位作者 Ying Liu C.Y. Chung Yonghong Deng Zhouguang Lu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2017年第8期1299-1304,共6页
A novel lath-shaped CuO microassemble consisting of well-crystalized ultrafine nanocrystals was prepared by an ionothermal method with the assistance of ionic liquids (ILs, 1-butyl-3-methylimidazolium tetrafluorobor... A novel lath-shaped CuO microassemble consisting of well-crystalized ultrafine nanocrystals was prepared by an ionothermal method with the assistance of ionic liquids (ILs, 1-butyl-3-methylimidazolium tetrafluoroborate). As anode material of lithium ion batteries, the ILs-CuO exhibits high specific capacity, durability and good rate per- formance, superior to bare CuO. At a high current density of 1000 mA·g^-1, after 100 cycles, ILs-CuO still retains a discharge capacity of 483.2 mAh·g^-1. The improved electrochemical performances could be ascribed to the unique microscale lath-shape CuO assembles composed of ultrafine nanostructure. 展开更多
关键词 lithium ion batteries anode lath-shaped CuO micro-assembles ionic liquid
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Position/Force Hybrid Control System for High Precision Aligning of Small Gripper to Ring Object 被引量:2
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作者 Juan Zhang De Xu +1 位作者 Zheng-Tao Zhang Wen-Sheng Zhang 《International Journal of Automation and computing》 EI CSCD 2013年第4期360-367,共8页
A position/force hybrid control system based on impedance control scheme is designed to align a small gripper to a special ring object. The vision information provided by microscope vision system is used as the feedba... A position/force hybrid control system based on impedance control scheme is designed to align a small gripper to a special ring object. The vision information provided by microscope vision system is used as the feedback to indicate the position relationship between the gripper and the ring object. Multiple image features of the gripper and the ring object are extracted to estimate the relative positions between them. The end-effector of the gripper is tracked using the extracted features to keep the gripper moving in the field of view. The force information from the force sensor serves as the feedback to ensure that the contact force between the gripper and the ring object is limited in a small safe range. Experimental results verify the effectiveness of the proposed control strategy. 展开更多
关键词 Feature extraction position/force hybrid control movement control microscope vision micro-assembly.
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