检索结果-内蒙古大学图书馆

Linear motion control of two-pendulums-driven spherical robot

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2011年第11期47卷 1-6页

作者： Zhao, Bo Wang, Pengfei Sun, Lining Li, Mantian State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150080 China

A spherical robot driven by two pendulums is designed, which is actuated by both the eccentric force and the inertial force generated by the inner drive unit when the robot is in motion. Because of the point contact between spherical shell and ground, the friction cannot counteract the change of motion state caused by motion error of inner drive unit when the robot is in a switching process between static configuration and dynamic configuration. A linear motion control method of two-pendulums-driven spherical robot is studied for the stable start-stop and speed control. The dynamic model of linear motion is constructed by Lagrange equation. A Gaussian function based smooth trajectory control method for linear motion is proposed through analysis of the relationship among dynamic parameters, and the correctness of the method is verified theoretically by simulation. A feedback controller of linear motion is designed to guarantee the accurate tracking of the expected value of practical control signals. The effectiveness of the controller is validated by simulation and prototype experiment. © 2011 Journal of Mechanical Engineering.

关键词： Feedback control

来源：评论

学校读者我要写书评

暂无评论

Visualization and real-time tracking technologies of the probe used in surgical navigation based on electromagnetic positioning

引用

Jiqiren/Robot 2011年第1期33卷 59-65页

作者： Tian, Heqiang Wu, Dongmei Wang, Jihu Du, Zhijiang Sun, Lining State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150080 China

The visualization and real-time tracking technologies of the probe in surgical navigation system are studied. The electromagnetic positioning method is introduced, and the probe with data acquisition function is designed based on electromagnetic positioning. Firstly, the probe model is constructed by means of three-dimensional solid modeling technology, and the transformation from the solid geometry model to the three-dimensional surface models is completed. Secondly, the probe tip is registered using the pivot calibration method and the registration accuracy is also tested. Then, the registration between the CT model and the patients site is realized intraoperatively by means of iterative closest point (ICP) algorithm, and simulation analysis and accuracy verification are carried out. Finally, according to the preoperatively registered position and orientation, the spatial location of the probe is tracked in real-time and accurately, and is displayed in the system. The results show that the data acquisition function and registration accuracy of the probe, as well as the effect of registration algorithms can meet the needs for surgical navigation.

关键词： Visualization

来源：评论

学校读者我要写书评

暂无评论

Piezo-powered Micro-dissection system with ultrasonic vibration

Piezo-powered Micro-dissection system with ultrasonic vibrat...

引用

作者： Chen, Liguo Liu, Yaxin Sun, Lining Robotics and Microsystems Center Soochow University Suzhou 215021 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9789881725592

In biomedical areas, Micro-dissection technology plays an important role for Cancer Genomics, through which pure population of targeted cells can be procured from tissue sections for subsequent analysis. In this paper, a novel Piezo-powered Micro-dissection system using ultrasonic vibration was developed. First, the Piezo-powered Micro-dissection principle and system construction will be introduced briefly. Then the key component of the system, piezo-powered micro-dissection tool, is proposed in detail. The micro-dissection tool could vibrate with the frequency scope from 0.5k to40K and the amplitude scope from 0 to 2m. Finally, a variety of experiments about bio-micro-dissection on liver tissue slice were carried out, and the experiments show the feasibility of the micro-dissection method with ultrasonic vibration. The new micro-dissection method can be adopted in the bio-micro-manipulation field and it can also significantly promote the development of Biomedical Engineering. © 2011 Chinese Assoc of Automati.

关键词： Microdissection

来源：评论

学校读者我要写书评

暂无评论

A study on surface EMG generation model and its extraction

A study on surface EMG generation model and its extraction

引用

2011 4th International Conference on Biomedical Engineering and Informatics, BMEI 2011

作者： Zou, Ling Ma, Xiaojuan Zhou, Tiantong Ma, Zhenghua School of Information and Science and Engineering Changzhou University Changzhou China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

ISBN: (纸本)9781424493524

A surface electromyography (sEMG) signal model is established and extracted from noisy background. Firstly, single fiber action potential (SFAP), motor unit action potential (MUAP) and motor unit action potential train (MUAPT) are simulated based on the tripolar signal source model, and then the sEMG is obtained. Secondly, the simulated sEMG signal is extracted from the mixed signals that consists of white noises, power frequency interference signal and electrocardio signal by independent component analysis (ICA) algorithms, and the most effective signal decomposition method Informax is chosen. It will lay the foundation for further decomposing the signals into single MUAP. © 2011 IEEE.

关键词： Independent component analysis

来源：评论

学校读者我要写书评

暂无评论

Master-slave control strategy for abdominal minimally invasive surgery robotic system

Master-slave control strategy for abdominal minimally invasi...

引用

2011 IEEE International Conference on robotics and Biomimetics, ROBIO 2011

作者： Fu, Yili Yu, Ying Wang, Shuguo State Key Laboratory of Robotics and System Science Park Harbin Institute of Technology Harbin 150001 China Jiamusi University Jiamusi 154007 China

ISBN: (纸本)9781457721373

According to characteristics of abdominal minimally invasive robotic surgical tasks, based on performant industrial computer platform, an extended multifunctional hardware communicates with PCI-bus is designed, a master-slave control system is studied. In order to solve the problem of low responsivity caused by traditional inverse kinematics transformation method, a algorithm based on equivalent differential transformation suitable for real-time master-slave surgical robot control is put forward, and the accumulated error of the algorithm is eliminated by feedback mechanism. A fast trajectory planning method efficient in real-time master-slave surgical robot control is put forward to replace traditional trajectory prediction and off-line calculation. Finally, in order to avoid the impact on the accuracy of the system coursed by hand-trembling of operators, a digital filter is designed to help filtering the master manipulator signal. © 2011 IEEE.

关键词： Inverse kinematics

来源：评论

学校读者我要写书评

暂无评论

Turning in place motion control of two pendulums driven spherical robot

引用

Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology 2011年第11期43卷 49-53页

作者： Zhao, Bo Li, Man-Tian Sun, Li-Ning State Key Laboratory of Robotics and System Harbin Institute of Technology 150001 Harbin China

Considering the turning in place motion as an independent motion which can enhance the mobility of spherical robot, a turning in place motion control method of two pendulums driven spherical robot is studied. First, the mechanism characteristics of two pendulums driven spherical robot are introduced, and then the force condition of turning in place motion is analyzed based on D'alembert's principle and the motion principle of turning in place motion of two pendulums driven spherical robot is discussed, finally, the dynamic model of turning in place motion is constructed. The whole process of turning in place motion is divided into three stages which are startup stage, stick stage and slip stage respectively, and a stick-slip principle for turning in place motion control is proposed. The effectiveness of the control method is validated by both simulation and prototype experiment.

关键词： Stick-slip

来源：评论

学校读者我要写书评

暂无评论

Analysis and experiment of stick-slip motion principle in a legged microrobot

Analysis and experiment of stick-slip motion principle in a ...

引用

6th International Forum on Strategic Technology, IFOST 2011

作者： Li, Weida Li, Juan Hu, Haiyan Li, Mantian Sun, Lining School of Mechanical and Electric Engineering Soochow University Suzhou China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin China

ISBN: (纸本)9781457703966

To solve the contradiction between high speed with high resolution for micro robot, a legged micro robot based on dual locomotion principles is presented. The dual locomotion principles include stick-slip principle in non-resonant condition and impact principle in resonant condition, which are respectively for high resolution and high velocity. Stick-slip principle is discussed mainly in this paper. Firstly, its driving process is divided into sticky phase and slip phase, in which static analysis and transient dynamic analysis is preceded respectively. Secondly, the relation between mechanism's vibration with friction force is analyzed by using numerical simulation method. And then the stick-slip principle is revealed based by micro robot. A legged micro robot prototype is developed, whose dimension is 70mm×35mm× 15mm and weight is about 3g. Experimental results show that the locomotion resolution of the prototype reaches 0.896 mm in forward direction when driving voltage is 10V. And the changing trend of resolution with voltage is consistent with theoretic analysis, which approves the validity of the analysis. © 2011 IEEE.

关键词： Stick-slip

来源：评论

学校读者我要写书评

暂无评论

Stability and performance of virtual reality-based telenanomanipulation system in SEM

Stability and performance of virtual reality-based telenanom...

引用

2011 International Conference on Environmental Biotechnology and Materials Engineering, EBME 2011

作者： Li, Dongjie Rong, Weibin Sun, Lining Xiao, Wanzhe State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China Harbin University of Science and Technology Harbin 150080 China

ISBN: (纸本)9783037850220

In this paper, a master/slave telenanomanipulation control system with force feedback is established with the micro-positioner (Attocube) working in scanning electron microscope (SEM) as the slave side and the haptic device (Omega3) as the master side. An improved virtual coupling (IVC) algorithm is introduced based on nanoscale virtual coupling (NSVC) by adding a proportional-plus- integral (PI) velocity controller in the haptic interface. The stability and performance of the established system are discussed. This method leads to an explicit design procedure for virtual coupling networks which give greatest performance while guaranteeing stability both on moving carbon nanowires in SEM and measuring force at the point of device-human contact. © (2011) Trans Tech Publications.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

Force analysis and modeling of carbon nanowires operation in SEM

Force analysis and modeling of carbon nanowires operation in...

引用

2011 International Conference on Environmental Biotechnology and Materials Engineering, EBME 2011

作者： Rong, Weibin Li, Dongjie Sun, Lining Wang, Jinyu State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China Harbin University of Science and Technology Harbin 150080 China

ISBN: (纸本)9783037850220

Due to influence of size effect, the force properties in nanoscale are greatly different from those in macroscale and the traditional models of operation are becoming difficult to meet the development of nanoscale manipulation. To provide guiding theory for practical nano-manipulation, the nanoscale forces of contact and non-contact operation of nanowires are analyzed for nano-manipulation in SEM. The Vander Waals models among the probe, nanowire and substrate are modeled according to the force properties in nanoscale, and then the simplified models are simulated with MATLAB. The influence degree of various factors and the relationship of them during the operation are obtained. At last, experimental system is established to verify the correctness of the proposed models. © (2011) Trans Tech Publications.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

Robot-assisted needle insertion strategies based on liver force model

引用

Jiqiren/Robot 2011年第1期33卷 66-70页

作者： Sun, Yinshan Wu, Dongmei Du, Zhijiang Sun, Lining State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150001 China

Considering the safety and accuracy issues caused by soft tissue deformation in robot-assisted percutaneous surgery, this paper presents two strategies for robot-assisted needle insertion into porcine liver based on needle insertion force model, structure and force characteristics of porcine liver. The first strategy requires the robot to automatically stop propelling the needle in the moment that the needle enters into the liver, and then continue to propel the needle with the half speed after the liver returns to relaxed state, aiming to minimize the inaccuracy caused by soft tissue deformation and improve surgical accuracy. The second strategy requires the robot to automatically stop propelling the needle if the needle insertion force exceeds ″critical line″ of the liver force model after the needle enters into the liver, and then continue to propel the needle after troubleshooting, aiming to avoid accidents during the needle insertion into the liver and improve surgical safety. The experimental results verify the effectiveness of our strategies for robot-assisted needle insertion.

关键词： Needles

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：