检索结果-内蒙古大学图书馆

Study on the influence of parameters of medical drill on bone drilling temperature

IOP Conference Series: Materials Science and Engineering 2018年第1期339卷

作者： Xianchun XU Yahui Hu Jingwang Han Lin Yue Wangbiao Jiang Tianjin Key Laboratory of Design and Intelligent Control of Advanced Mechatronical System Tianjin 300384 China Tianjin University of Technology 300384 China.

During surgical interventions, the temperature generated during cortical bone drilling can affect the activity of bone material, which may lead to necrosis. In this paper, with the purpose of reducing the temperature during cortical bone drilling, the influence of the parameters of medical drill were analyzed. The finite element model of the drilling process was established based on the parametric design of the dril. The relationship between the drill bit diameter, the point angle, and the helix angle to the drilling temperature was studied by the center composite experiment. The results showed that the drilling temperature is increased with the increase of drill diameter, vertex angle and helix angle in the range of certain research.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Pickup Manipulator design and Its Kinematics Simulation

引用

IOP Conference Series: Earth and Environmental Science 2018年第4期170卷

作者： Zhongdang Zhang Zhaoqiang Zhang Shitai Ma Haibo Zhou Tianjin University of Technology Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin 300384 China National Demonstration Center for Experimental Mechanical and electrical Engineering Education (Tianjin University of Technology) Tianjin 300384 China

In order to improve the flexibility of the pickup manipulator and solve the problem of picking up small sports balls in training ground such as golfing, tennis, and table tennis, a 5-DOF pickup manipulator structure is designed. According to the pickup task requirements of the manipulator, through theoretical calculations, the 86HS series stepping motor is selected as the driving motors of the front end joints. Based on this, the stepping motor control system is designed to realize the closed-loop control of the manipulator. Then the manipulator model is built using D-H method, the inverse kinematics solution is calculated, and the analysis of kinematic theory is conducted. Finally, the targeted pickup point is selected to carry out case simulation analysis of the manipulator, the motion law of the manipulator is verified to be reasonable and the task of picking up small sports balls is completed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Experimental research on dynamic characteristics analysis of machine tool based on unit structure

引用

Revista de la Facultad de Ingenieria 2016年第4期31卷 70-84页

作者： Zhu, Peihao Zheng, Qingchun Hu, Yahui Wang, Bing Chao, Jiaqi Tu, Huan Sun, Ning Li, Jinxiang School of Mechanical Engineering Tianjin University of Technology Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin300384 China

By the experiment modal research for unit structure, the natural frequency and mass of US by means of experimental modal analysis is explored. Experimental modal analysis on US was applied to achieve optimal US simultaneously to satisfy multiple conflicting performance requirements of mass and natural frequency of US. Then the structural parameters of US were optimized to increase natural frequencies and reduce mass. Experimental modal analysis is an efficient technique to accurately identify the dynamic behavior of a structure and provides modal parameters, such as natural frequencies and mode shapes.

关键词： Modal analysis

来源：评论

学校读者我要写书评

暂无评论

Finite Element Analysis on Loosen Teeth using Fibrous Periodontal Splint Restoration

引用

IOP Conference Series: Materials Science and Engineering 2018年第1期417卷

作者： Chengshui Ding Xue Shi Yang Song Lulu Qiu Xinyue Li Chunqiu Zhang Tianjin Key Laboratory of the Design Intelligent Control of the Advanced Mechatronical System National Demonstration Center for Experimental Mechanical and Electrical Engineering Education School of Mechanical Engineering Tianjin University of Technology Tianjin 300384 China Periodontitis Department Tianjin Stomatological Hospital Tianjin 300384 China

Objective To investigate the effect of fibre periodontal splint restoration on mandibular anterior teeth displacement and periodontal membrane stress. Methods Micro-CT scanning technology, combined with Mimics, Geomagic studio and SolidWorks were used to establish 3D dental models of mandibles with teeth and the models fibre periodontal splint restoration; the models of mandibular anterior loosen teeth was constructed under 30 degree oblique 25N loading on the labial and lingual sides respectively. Then, under different angles force with or without the splint, the analysis on dental mechanical state are given. Results It was determined that the sum of the maximal displacement of the loosen tooth model at the lingual and labial sides was 1 mm, which represented the degree I loosen model. After splint repair on the model, the maximal displacement of loosen tooth decreased 47.7%, 85.1% and 85.8% at 0 degree, 15 degree and 30 degree forces respectively, and the maximum stress of periodontal membrane decreased by 22.3%, 61.2% and 74.9%. Conclusion Fixation of loosen teeth through fibre periodontal splints can reduce the maximum stress of periodontal membrane and the maximal displacement of the teeth, thus ensuring the stability of loosen tooth.

关键词：

来源：评论

学校读者我要写书评

暂无评论

design and kinematics analysis of a novel liquid-brewing steamer feeding robot

Design and kinematics analysis of a novel liquid-brewing ste...

引用

2016年土木、建筑与环境工程国际学术会议

作者： Jiashuang Zhang Bin Li Tongchen Zhang Xinhua Zhao Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology

ISBN: (纸本)9781138065833

In this paper,a novel steamer feeding robot is designed and *** compared to the currently used steamer feeding robot,the feeding process of the proposed robot is continuous,and this way will greatly improve the efficiency and quality of the feeding ***,the mechanical structure and kinematics of the novel steamer feeding robot are introduced and *** then,the control system of the robot is ***,experiment evidences are given to prove the efficiently of brewing by using this robot.

关键词： design and kinematics analysis of a novel liquid-brewing steamer feeding robot

来源：评论

学校读者我要写书评

暂无评论

Short-term creep behavior in P91 heat-resistant steel at low stress

Short-term creep behavior in P91 heat-resistant steel at low...

引用

Chinese Materials Congress on Methods of design and Characterization of Materials, Research and Development of Technological Processes, 2015

作者： Zhao, Pengshuo Shen, Junjie Zhang, Hui Tianjin key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System School of Mechanical Engineering Tianjin University of Technology 391 Binshui Road Xiqing District Tianjin China Tianjin Entry-Exit Inspection and Quarantine Bureau China

ISBN: (纸本)9783038357629

P91 heat-resistant steel is widely used in the high temperature of piping components of thermal power plants and nuclear power plants. In these conditions, the typical failure of P91 is mainly caused by creep at low stress. In this investigation the short-term creep behavior in P91 at low stress was investigated by helicoid spring creep test due to its high strain-sensitivity. The helicoid spring creep was based on the assumption of pure torsion. The mechanics field was firstly studied by ANSYS finite-element simulation to find the establishing conditions of pure torsion. Secondly, the creep properties of P91 were studied under the conditions of the temperatures of 0.38Tmm and the stresses of 14.6 MPa, 25 MPa, 34 MPa, respectively. The ANSYS finite-element simulation shows that the creep deformation is considered to be pure torsion when the pitch spacing of coil is between 2mm to 4mm. The creep curves show "Normal type ", and "the stress exponent" is n=0.9. © 2016 Trans Tech Publications, Switzerland.

关键词： Creep

来源：评论

学校读者我要写书评

暂无评论

Comparative Study of Two 2-RPU+SPR Parallel Manipulators

Comparative Study of Two 2-RPU+SPR Parallel Manipulators

引用

World Congress on intelligent control and Automation

作者： Qiang Yan Bin Li Yangmin Li Xinhua Zhao Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781467384155

A comparative study of two over-constrained 2-RPU+SPR parallel manipulators (PM) is studied in terms of workspace and transmission performance in this paper. The two 2-RPU+SPR PMs have identical kinematics limbs, but some differences exist in terms of the joints distribution. The kinematics, the workspace and the transmission performance are studied and simulation examples are presented to demonstrate the differences between the two PMs. This study provides insights into the two parallel manipulators with identical limbs but with different joints distribution.

关键词： Decision support systems TV intelligent control Automation Senior members

来源：评论

学校读者我要写书评

暂无评论

Experimental Study On The Identification Model Of Dynamic Milling Force Coefficient

Experimental Study On The Identification Model Of Dynamic Mi...

引用

2016 4th International Conference on Machinery,Materials and Computing Technology(ICMMCT 2016)

作者： Xinghua Niu Tianding Wang Tiemin Zhao Qianyou Huang Tianjin University of Technology Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System

The identification model of milling force coefficient is established using the model of dynamic milling force and the regression analysis of the milling force experiment data. On the basis of the existing milling force model, by simplifying and calculation, it can get the relational expression between milling force coefficient and average value of the milling force. Arranging the milling force experiment and measuring average milling force, the experiment results of milling force coefficient can be calculated. Then, the polynomial expression of identification model of milling force coefficient is established, and its coefficient values can be got by regression analysis. Finally, the accuracy and applicability of the identification model is verified by experiment. The experimental results show that the prediction results of the model are accurate and reliable, and can meet different processing conditions, provide the theoretical basis and reference for the further study of milling process and optimization.

关键词： milling force model coefficient identification orthogonal experiment regression analysis

来源：评论

学校读者我要写书评

暂无评论

Structure design and dynamic modelling of a novel modular self-reconfigurable robot

Structure design and dynamic modelling of a novel modular se...

引用

IEEE International Conference on mechatronics and Automation

作者： Jie Huang Weimin Ge Xiaofeng Wang Jun Liu Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology Tianjin China

ISBN: (纸本)9781509023974

Reconfigurability of the modular robot is becoming curial to be a high flexibility for the wide varieties of tasks and environments. In this paper, a novel self-reconfigurable modular robot called M 2 sbot is designed, which has the approximate cuboid shaping structure. The unit model is with one active and five passive connection surfaces, compact structure and flexible motion. It is characterized by using the unique hook-claw docking mechanism as the docking part of the neighbor modular. And the responding control system based on STM32F103VET6 is also implemented. The forward kinematic equations of the chain robot are established, and then the dynamic equation is generated by the recursive Newton-Euler method based on the global matrix description. Finally, the calculation and simulation analysis of the six-module configuration with two branches demonstrates the feasibility of the proposed method in the generation of motion equation.

关键词： Gears Mathematical model Kinematics DC motors Robot sensing systems Robot kinematics

来源：评论

学校读者我要写书评

暂无评论

The Prediction Model of Surface Roughness Based on Experiments of Turning Titanium Alloy

The Prediction Model of Surface Roughness Based on Experimen...

引用

IEEE International Conference on mechatronics and Automation

作者： Cuilei Yang Qingchun Zheng Yahui Hu Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology Tianjin 300384 China

ISBN: (纸本)9781509023974

The experiments of turning titanium alloy are carried out by using central composite design, the influences of cutting speed, feed rate and cutting depth on surface roughness are analyzed. The surface roughness prediction model is established based on the response surface method. The significance of the regression equation is validated and the influences of the cutting parameters on surface roughness are compared. The results show that: within the range of cutting parameters used in the experiments, the most significant parameter on surface roughness is given by feed rate, followed by cutting depth, and the cutting speed has minimal effect on surface roughness;the prediction model is significant. It can be used to select various suitable parameters before the machining processing to predict and control the surface roughness.

关键词： Titanium alloy Surface roughness Turning Parameters

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：