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mechanical design of an ultra-light vertex detector prototype for CEPC

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Radiation Detection Technology and Methods 2022年第2期6卷 159-169页

作者： Jinyu Fu Zhijun Liang Hao Zeng Gang Li Mingyi Dong Huamin Qu Joao Guimaraes da Costa Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Particle Detection and Electronics.Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Background The Circular Electron Positron Collider(CEPC)is a large international scientific facility proposed to study the Higgs boson in great *** requires state-of-the-art detectors,including extremely precise vertexing and tracking devices,such as a silicon vertex *** Silicon vertex detector with the precision required by the CEPC has never been built before and needs extensive research and *** paper describes the mechanical design of a vertex detector prototype being built to explore the required technologies and the major *** The exceptional high spatial resolution of the CEPC vertex detector is achievable only with a detector of extremely low mass to limit particle *** paper proposes a mechanical design for the vertex detector prototype,highlighting the choice of low-mass materials,the analysis of support structures,the solution of detector cooling issues,and the drafts of procedures for detector *** The ultra-light support of the ladder(a structural unit of the CEPC vertex detector prototype),which is mainly made of carbon fiber reinforced polymer composite,has been *** fabrication process has also been *** supporting and cooling method of the vertex detector prototype has been designed and chosen with results from finite element analysis and computational fluid dynamics *** assembly and installation schemes for the prototype have been developed,and the respective tooling has also been *** performance of the vertex detector prototype,using this low-mass mechanical structure,was demonstrated with fast simulation to closely meet the CEPC physics requirement.

关键词： CEPC Silicon detector mechanical design Carbon fiber reinforced polymer

mechanical design and Dynamic Compliance Control of Lightweight Manipulator

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International Journal of Automation and computing 2021年第6期18卷 926-934页

作者： Shao-Lin Zhang Yue-Guang Ge Hai-Tao Wang Shuo Wang State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In the existing modular joint design and control methods of collaborative robots, the inertia of the manipulator link is large,the dynamic trajectory planning ability is weak, the collision stop safety strategy is dependent, and the adaptability and safety to the changing environment are limited. This paper develops a six-degree-of-freedom lightweight collaborative manipulator with real-time dynamic trajectory planning and active compliance control. Firstly, a novel motor installation, joint transmission, and link design method is put forward to reduce the inertia of the links and improve intrinsic safety. At the same time, to enhance the dynamic operation capability and quick response of the manipulator, a smooth planning of position and orientation under initial/end pose and velocity constraints is proposed. The adaptability to the environment is improved by the active compliance control. Finally, experiments are carried out to verify the effectiveness of the proposed design, planning, and control methods.

关键词： Lightweight manipulator mechanical design dynamic trajectory planning compliance control robot control

mechanical design of a low β superconducting elliptical cavity for CSNS-II

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Radiation Detection Technology and Methods 2021年第3期5卷 315-323页

作者： Peihua Qu Huachang Liu Yun Wang Bo Li Xiaolei Wu Ahong Li Mengxu Fan Qiang Chen Jun Peng Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China

Background A lowβsuperconducting elliptical cavity was designed for the China Spallation Neutron Source phase II project(CSNS-II).Methods The method to improve the mechanical stability of the lowβsuperconducting elliptical cavity was introduced,and the corresponding mechanical design was *** software COMSOL Multiphysics and ANSYS APDL were used to calculate the static Lorentz force detuning factor k_(L)(LFD)and the helium pressure sensitivity factor k_(p)(DFDP)of the bare cavity,which were−4.71 Hz(MV/m)^(−2) and−21.1 Hz/mbar,*** double-ring stiffeners reinforcement scheme was *** The radii of the double-ring stiffeners were 70 and 135 mm,*** structure design of the helium vessel of the cavity was *** following is the mechanical parameters of the reinforced cavity,the tuning sensitivity is 199.8 kHz/mm,longitudinal stiffness is 4.76kN/mm,k_(L) and k_(p) were−1.39 Hz(MV/m)^(−2) and 4.67 Hz/mbar,respectively,which met the operating *** tuning sensitivity and stiffness of the reinforced cavity with different wall thicknesses were optimized,and the final wall thickness was selected as 4 *** The mechanical design of CSNS-II 648 MHz five-cell lowβsuperconducting elliptical cavity was introduced systematically in the *** LFD,DFDP,and the maximum surface stress of the cavity were reduced by optimizing the cavity wall thickness and the position of the double-ring *** reinforced cavity met operational requirements.

关键词： Lowβsuperconducting elliptical cavity mechanical design LFD DFDP Tuning sensitivity Longitudinal stiffness

mechanical design of a cryogenic Delta-Knot undulator for high energy photon source

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Radiation Detection Technology and Methods 2021年第1期5卷 122-127页

作者： Shuchen Sun Huihua Lu Xiaoyu Li Xiangzhen Zhang Yanwei Yang Yajun Sun Lei Zhang Yuhui Li Zhiqiang Li Wan Chen Lingling Gong Shutao Zhao Qing Guo Keyun Gong Yongsheng Huang Yufeng Yang Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Science Beijing 100049China

Introduction A novel type of pure permanent cryogenic Delta–Knot Undulator was developed at IHEP to supply a high flux of full adjustable polarization synchrotron radiation with low on-axis power *** prototype was an active attempt and early exploration for future APPLE–Knot undulator,which will be used at high energy photon source(HEPS).Materials and methods There are several challenges to develop a cryogenic delta undulator,such as the complicated structure,the influence of large magnetic force,and the magnetic measurement difficulty due to the very small *** this paper,the mechanical design for overcoming these difficulties will be presented in *** A special hall measuring system is developed,and the preliminary results agree with the theoretical *** undulator prototype will provide valuable experience for angle magnetization technology,intricate magnetic attraction structure design,and magnetic field measurement under closed small space.

关键词： Insertion device Undulator Synchrotron radiation photon source Low-emittance storage ring mechanical design

A Review of Research on the mechanical design of Hoverable Flapping Wing Micro-Air Vehicles

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Journal of Bionic Engineering 2021年第6期18卷 1235-1254页

作者： Shengjie Xiao Kai Hu Binxiao Huang Huichao Deng Xilun Ding Robotics Institute Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Biomedical Engineer Beihang UniversityBeijing 100191China

Most insects and hummingbirds can generate lift during both upstroke and downstroke with a nearly horizontal flapping stroke plane,and perform precise hovering ***,most birds can utilize tails and muscles in wings to actively control the flight performance,while insects control their flight with muscles based on wing root along with wing’s passive *** on the above flight principles of birds and insects,Flapping Wing Micro Air Vehicles(FWMAVs)are classified as either bird-inspired or insect-inspired *** this review,the research achievements on mechanisms of insect-inspired,hoverable FWMAVs over the last ten years(2011-2020)are *** also provide the definition,function,research status and development prospect of hoverable *** discuss it from three aspects:bio-inspiration,motor-driving mechanisms and intelligent actuator-driving *** this,research groups involved in insect-inspired,hoverable FWMAV research and their major achievements are summarized and classified in ***,trends and challenges about the mechanism are compiled and ***,this paper presents conclusions about research on mechanical structure,and the future is discussed to enable further research interests.

关键词： Hoverable Flapping wing Insect-inspired mechanical design Motor drive Intelligent actuator

Concept of Intelligent mechanical design for Autonomous Mobile Robots

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Journal of Bionic Engineering 2007年第4期4卷 217-226页

作者： Amir A. F Nassiraei Kazuo Ishii Kyushu Institute of Technology Kitakyushu Fukuoka 808-0196 Japan

The concept of Intelligent mechanical design （IMD） is presented to show how a mechanical structure can be designed to affect robot controllability, simplification and task performance. Exploring this concept produces landmarks in the territory of mechanical robot design in the form of seven design principles. The design principles, which we call the Mecha-Telligence Principles （MTP）, provide guidance on how to design mechanics for autonomous mobile robots. These principles guide us to ask the right questions when investigating issues concerning self-controllable, reliable, feasible, and compatible mechanics for autonomous mobile robots. To show how MTP can be applied in the design process we propose a novel methodology, named as Mecha-Telligence Methodology （MTM）. mechanical design by the proposed methodology is based on preference classification of the robot specification described by interaction of the robot with its environment and the physical parameters of the robot mechatronics. After defining new terms, we investigate the feasibility of the proposed methodology to the mechanical design of an autonomous mobile sewer inspection robot. In this industrial project we show how a passive-active intelligent moving mechanism can be designed using the MTM and employed in the field.

关键词： mechanical design intelligent autonomous robot mobile robot

mechanical design of Long-Term Body-Adhered Medical Devices to Maximize On-Body Survival

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Journal of Biomedical Science and Engineering 2021年第9期14卷 325-337页

作者： Brian Ferry John Abraham University of St. Thomas St. Paul MN USA

Long-term, body-adhered medical devices rely on an adhesive interface to maintain contact with the patient. The greatest threat to on-body adhesion is mechanical stress imparted on the medical device. Several factors contribute to the ability of the device to withstand such stresses, such as the mechanical design, shape, and size of the device. This analysis investigates the impact that design changes to the device have on the stress and strain experienced by the system when acted on by a stressor. The analysis also identifies the design changes that are most effective at reducing the stress and strain. An explicit dynamic finite element analysis method was used to simulate several design iterations and a regression analysis was performed to quantify the relationship between design and resultant stress and strain. The shape, height, size, and taper of the medical device were modified, and the results indicate that, to reduce stress and strain in the system, the device should resemble a square in shape, be short in height, and small in size with a large taper. The square shape experienced 17.5% less stress compared to the next best performing shape. A 10% reduction in device height resulted in a 21% reduction in stress and 24% reduction in strain. A 20% reduction in device size caused a 7% reduction in stress and 2% reduction in strain. A 20% increase in device taper size led to a negligible reduction in stress and a 6% reduction in strain. The height of the device had the greatest impact on the resultant stress and strain.

关键词： Finite Element Analysis Explicit Dynamics Numerical Simulation Comparative Analysis Medical Device Body-Worn Device mechanical design

mechanical design and Kinematic Simulation of Automated Assembly System for Relay

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World Journal of Mechanics 2016年第1期6卷 1-7页

作者： Zhenghao Liu Hong Chen College of Mechatronics and Control Engineering Shenzhen University Shenzhen China

By means of Solid Works, three-dimensional model of automated assembly system was established, and kinematic simulation based on Solid Works Motion of assembly process for relay was performed. The simulation results proved the feasibility of mechanical design. Eventually, the productivity was estimated based on simulation analysis. The mechanical design provided a solution with high reference value to practical design of automated assembly system for relay.

关键词： Relay mechanical design Solid Works Kinematic Simulation Solid Works Motion

mechanical design and Preliminary Realization of Robotic Fish with Multiple Control Surfaces

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Mechanical Design and Preliminary Realization of Robotic Fis...