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A reusable SMA actuated non-explosive lockrelease mechanism for space application

International Journal of Smart and Nano Materials 2020年第1期11卷 65-77页

作者： Xueting Pan Yuliang Zhang Yifan Lu Fei Yang Honghao Yue State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbinChina Beijing Spacecraft BeijingChina

After the satellite is launched with the carrier rocket,it is necessary to separate the satellite from the rocket at an appropriate time to ensure that the satellite enters the intended *** this process,it is vital to ensure a reliable connection and accurate *** the increasing use of microsatellite in orbit,the contradiction between the shock of separation and the requirement of the platform’s dynamic environment is becoming increasingly ***,the traditional pyrotechnic separation device can no longer meet the *** paper presents a reusable non-explosive release actuator using shape memory alloy(SMA)wire for high load and low *** system is based on the Fast Acting Shock-less Separation Nut(FASSN)*** the shape memory effect of SMA,a biased SMA wire trigger has been developed,which is used as the driver source of the *** the moment of receiving the electrical signal,the SMA wire generates stress and *** trigger set free the constraints on the mechanical components,and the target is *** results indicate that the trigger device can unlock successfully and well meet the technical objectives.

关键词： SMA actuator non-explosive lock-release space application

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The effect of LPSO phase on the high-temperature oxidation of a stainless Mg-Y-Al alloy

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Journal of Magnesium and Alloys 2024年第10期12卷 4045-4052页

作者： Zhipeng Wang Zhao Shen Yang Liu Yahuan Zhao Qingchun Zhu Yiwen Chen Jingya Wang Yangxin Li Sergio Lozano-Perez Xiaoqin Zeng National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Institute of Medical Robotics Shanghai Jiao Tong UniversityShanghai 200240China Department of Materials Science University of OxfordParks RoadOxford OX13PHUK

In this study,we investigated the oxidation of the Mg-11Y-1Al alloy at 500℃in an Ar-20%*** analysis showed the network-like long-period stacking ordered(LPSO)phase transformed into needle-like LPSO and polygonal Mg24Y5 phases,leading to the formation of a high-dense network of needle-like oxides at the oxidation *** oxides grew laterally along the oxide/matrix interfaces,forming a thicker,continuous scale that effectively blocked elemental ***,the preferential oxidation along the needle-like LPSO is believed to accelerate the formation of a thicker and continuous oxide scale,further improving the oxidation resistance of the Mg-11Y-1Al alloy.

关键词： Mg alloy LPSO phase Oxidation TEM TKD.

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Research on Database Construction and Assembly Path Planning Method for key Components of Phased Array Antennas 8

Research on Database Construction and Assembly Path Planning...

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8th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2024

作者： Chen, Minghui Jin, Chaoning Xi, Lei Han, Yong Zhou, Bo Nanchang Yanchang Electromechanical Technology Co. Ltd Jiangxi Nanchang330096 China The 39th Research Institute of China Electronics Technology Group Corporation Shaanxi Xi'an710065 China Shenyang Institute of Automation Chinese Academy of Sciences State Key Laboratory of Robotics Liaoning Shenyang110016 China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Liaoning Shenyang110169 China

ISBN: (纸本)9798331506230

Compared with traditional antennas, phased array antennas with key structural components such as multi Vilvadi oscillators and grid plates have advantages such as high gain and high directional ability. Due to the need for a large number of structural components in phased array antennas, this will affect the performance and assembly accuracy of the assembled antenna. How to quickly and reasonably provide an assembly error distribution plan is the key to improving the performance of phased array antennas. This paper proposes a database based on geometric feature extraction of contact surfaces and finite element analysis of contact stress to obtain an optimized assembly plan for key components of phased array antennas, which requires the use of a large number of key components. Considering the real-time updated assembly data, a reasonable assembly path planning method was planned to avoid assembly interference. The simulation results show that this method can significantly improve assembly efficiency and provide a reasonable assembly error distribution scheme. © 2024 IEEE.

关键词： Database systems

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A Novel Lightweight Architecture of Deep Convolutional Neural Networks 12

A Novel Lightweight Architecture of Deep Convolutional Neura...

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12th International Conference on CYBER Technology in Automation, Control, and Intelligent systems, CYBER 2022

作者： Liu, Baichen Chen, Xi'ai Han, Zhi Jia, Huidi Tang, Yandong State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang110016 China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences University of Chinese Academy of Sciences Beijing100049 China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences China

ISBN: (数字)9781665472678

ISBN: (纸本)9781665472678

Deep convolutional neural networks have achieved much success in many computer vision tasks. However, a network has millions of parameters which limit its inference speed and usage for some situations with limited storage space. Low-rank based methods and pruning methods are verified effective to compress the number of parameters and accelerate inference speed of deep convolutional neural networks. As the price, the performance of the networks decreases. To overcome this problem, in this paper, we design a novel low-rank and sparse architecture of convolutional neural networks. Besides accelerating inference speed and reducing parameters, our approach achieves better performance than baseline networks. © 2022 IEEE.

关键词： Convolutional neural networks

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Acquiring Large Field-of-View Optical Super-Resolution Images Using Adaptive As-Natural-As-Possible (AANAP) Image Stitching Method 13

Acquiring Large Field-of-View Optical Super-Resolution Image...

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13th IEEE International Conference on CYBER Technology in Automation, Control, and Intelligent systems, CYBER 2023

作者： Sun, Hui Chen, Meng Wu, Cong Luo, Hao Chen, Qingjiu Jia, Boliang Zhang, Guanglie Li, Wen Jung City University of Hong Kong Department of Mechanical Engineering Hong Kong Hong Kong Shenyang Institute of Automation State Key Laboratory of Robotics Chinese Academy of Sciences Shenyang110016 China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang110169 China Shenzhen518000 China Hong Kong

ISBN: (纸本)9798350315196

Optical super resolution (OSR) is a technique that enhances the spatial resolution of images beyond the diffraction limit of the imaging system. OSR images can provide more details and information compared with conventional optical microscopes that are limited by the diffraction limit of light and thus have a best spatial resolution of about 200 nm. Moreover, the trade-off between magnification and field of view (FOV) hinders capturing large-scale structures and fine details simultaneously. Therefore, novel microscopy techniques that can overcome these limitations and provide high-resolution and large-FOV images of biological samples need to be developed. In this paper, a new method combining microsphere-based optical microscopic super-resolution imaging system and the image stitching method are proposed to improve the resolution and FOV conventional optical microscopy. First, the technique captures multiple images through the microsphere at different positions by moving the samples. Then, the technique stitches together the images using a registration algorithm to form a high-resolution, wide-field image. This technique can overcome the diffraction limit of optical microscopy and achieve sub wavelength resolution with a large FOV. It can be used in various fields of science and engineering, such as cell imaging, tissue imaging, and disease diagnosis. © 2023 IEEE.

关键词： Microspheres

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Enhancement of Two-Photon Fluorescence Microscopy Through Auxiliary Microspheres for Microscopic Observation 14

Enhancement of Two-Photon Fluorescence Microscopy Through Au...

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14th IEEE International Conference on Cyber Technology in Automation, Control, and Intelligent systems, CYBER 2024

作者： Zhang, Feng Jin, Zijian Jiang, Chaodi Yuan, Shuai Yang, Yongliang Wang, Xiaoduo School of Electrical & Control Engineering Shenyang Jianzhu University Liaoning Province Shenyang110168 China School of Computer Science and Engineering Shenyang Jianzhu University Liaoning Province Shenyang110168 China Shenyang Institute of Automation Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang110016 China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang110169 China

ISBN: (纸本)9798331506056

At present, it is still a great challenge to improve the observation accuracy of two-photon fluorescence microscope. A new method that using auxiliary microspheres as movable components on the sample is proposed to solve this challenge in this study, it can improve high-resolution imaging. In experiments using two-photon fluorescence microscopy, the half-width height (FWHM) of red fluorescent nanoparticles with a diameter of 20 nm was observed to be 296 nm using a primitive microscope system. In this paper by combining barium titanate microspheres with two-photon fluorescence microscopy, the accuracy of the point spread function of the nanoparticles can be improved by a factor of about 1.65, which results in a significant reduction of their half-width height measurements to 179 nm. The research is of great significance to improve the resolution of two-photon fluorescence microscope. This progress is very valuable for studying biological tissues and cell structures, it provides a new impetus for the sustainable development in the microscopic imaging field. © 2024 IEEE.

关键词： Microspheres

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Obstacle Identification Based on Deep Learning for Inspection Robot of FAST Wire Rope

Obstacle Identification Based on Deep Learning for Inspectio...

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Automation, robotics and Computer Engineering (ICARCE), International Conference on

作者： Chengxu Yang Xiangyu Sun Gangfeng Liu School of Mechatronics Engineering Harbin Institute of Technology Harbin China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

In this paper, for the requirements of image recognition and localization of the obstacles existing on the moving path in the inspection task of FAST cable inspection robot, the deep learning method is used to realize the recognition of multi-kind and multi-scale obstacles. The obstacles on FAST wire rope have not been identified before. By enhancing the data set and improving the network model, the recognition accuracy and speed are both improved, which meets the efficiency and accuracy requirements of obstacle detection on the wire rope, and provides help for the subsequent robot pace planning and overhaul tasks.

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Disturbance-observer-based Controll of the Underwater Vehicle for Manipulation

Disturbance-observer-based Controll of the Underwater Vehicl...

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robotics, Control and Automation (ICRCA), International Conference on

作者： Yiqun Wang Qiyan Tian Yiping Li Shuo Li Hailin Wang Zhibin Jiang State Key Laboratory of Robotics Chinese Academy of Sciences Shenyang Institute of Automation Shenyang China Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Shenyang China University of Chinese Academy of Sciences Beijing China Key Laboratory of Marine Robotics Liaoning Province Shenyang China

ISBN: (数字)9798350344721

ISBN: (纸本)9798350344738

Recently, more and more interventional underwater vehicles are widely used in marine industry and marine science. The vehicle-manipulator system is a hybrid vehicle composed of a remotely operated underwater vehicle (ROV) and an autonomous underwater vehicle (AUV). An importance issue for the vehicle-manipulator system is to keep consistent control performance of underwater manipulation. In this paper, a control scheme based on the disturbance observer is proposed to maintain high performance even under lumped disturbance that includes the motion of the manipulator, model uncertainties and currents. The compensation item of the controller is able to achieve quick response to attenuating disturbance, and is also able to decrease in the absence of disturbance. In other words, the proposed control scheme alleviates the restriction of the feedforward control that is regarded as a valid method to relieve the influence of disturbance. The effectiveness of the proposed control scheme is demonstrated by lake experiments.

关键词： Industries Autonomous underwater vehicles Uncertainty Automation Lakes Manipulators Disturbance observers

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A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow force measurement

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Frontiers of Mechanical Engineering 2023年第2期18卷 297-317页

作者： Wendi GAO Bian TIAN Cunlang LIU Yingbiao MI Chen JIA Libo ZHAO Tao LIU Nan ZHU Ping YANG Qijing LIN Zhuangde JIANG Dong SUN State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesOverseas Expertise Introduction Center for Micro/Nano Manufacturing and Nano Measurement Technologies Discipline InnovationXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265599China State Key Laboratory of Robotics and Systems(HIT) Harbin 150006China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China Department of Biomedical Engineering City University of Hong KongHong KongChina

Capacitive sensors are efficient tools for biophysical force measurement,which is essential for the exploration of cellular ***,attention has been rarely given on the influences of external mechanical and internal electrical interferences on capacitive *** this work,a bionic swallow structure design norm was developed for mechanical decoupling,and the influences of structural parameters on mechanical behavior were fully analyzed and optimized.A bionic feather comb distribution strategy and a portable readout circuit were proposed for eliminating electrostatic *** instability was evaluated,and electrostatic decoupling performance was verified on the basis of a novel measurement method utilizing four complementary comb arrays and applicationspecific integrated circuit *** electrostatic pulling experiment showed that the bionic swallow structure hardly moved by 0.770 nm,and the measurement error was less than 0.009% for the area-variant sensor and 1.118% for the gap-variant sensor,which can be easily compensated in *** proposed sensor also exhibited high resistance against electrostatic rotation,and the resulting measurement error dropped below 0.751%.The rotation interferences were less than 0.330 nm and(1.829×10^(-7))°,which were 35 times smaller than those of the traditional differential *** on the proposed bionic decoupling method,the fabricated sensor exhibited overwhelming capacitive sensitivity values of 7.078 and 1.473 pF/μm for gap-variant and area-variant devices,respectively,which were the highest among the current *** immunity to mechanical disturbances was maintained simultaneously,i.e.,less than 0.369% and 0.058% of the sensor outputs for the gap-variant and area-variant devices,respectively,indicating its great performance improvements over existing devices and feasibility in ultralow biomedical force measurement.

关键词： micro-electro-mechanical system capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force measurement

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On Networked Dynamical systems with Heterogeneous Constraints:Equilibrium Points and Stability 41

On Networked Dynamical Systems with Heterogeneous Constraint...

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第41届中国控制会议

作者： Qichao Ma Jiahu Qin Yu Kang Huijun Gao Department of Automation University of Science and Technology of China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Institute of Advanced Technology University of Science and Technology of China Research Institute of Intelligent Control and Systems and the State Key Laboratory of Robotics and System Harbin Institute of Technology

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

In this paper,we investigate multi-agent systems with heterogeneous constraints,which can represent the heuristic beliefs of the agents towards an issue or the physical constraints of the *** typical example is a group of interacting unmanned aerial vehicles in a complex environment with multiple physical *** a result of the heterogeneity of the constraints,an equilibrium point may not exist and is presumably to be a dissensus point when it *** investigate the existence of equilibrium points from the perspective of Kakutani's fixed point theory for a set-valued *** also prove the local/global stability of certain equilibrium ***,a special case that the constraints are homogeneous is taken into *** constrains are assumed to take interval forms with nonempty *** is proved that consensus can be achieved globally and asymptotically for this *** examples are designed to illustrate our theoretical findings.

关键词： Multi-agent systems heterogeneous constraints equilibrium point and its stability constrained consensus

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