检索结果-内蒙古大学图书馆

European Conference on Biomedical Optics, ECBO 2011

作者： Zhang, Yaokun Burgner, Jessica Raczkowsky, Jörg Wörn, Heinz Institute for Process Control and Robotics Karlsruhe Institute of Technology Germany Mechanical Engineering Department Vanderbilt University United States

ISBN: (纸本)9780819486837

While using a laser to process hard tissue, it is difficult to guarantee, that the laser beam is always perpendicular to the tissue surface. Therefore, it is necessary to know the dependence of ablation depth on angle of incidence for preoperative planning. Considering the propagation of the ablation front, an Addition Model is developed in this work. It indicates that the shape of a crater ablated by a single pulse with non-zero angle of incidence can be regarded as the sum of the original tissue surface and a symmetric profile, which is corresponding to the shape of a crater ablated by perpendicularly incident beam. Meanwhile, the ablation depth at a point P is defined as the distance from P to the original tissue surface along the optical axis of the incident beam. In the context of this definition, the dependence is experimentally studied. The results of the experiments were unexpected: the ablation depth is independent of angle of incidence up to ca. 55°. Possible reasons for these results are discussed. © 2011 SPIE-OSA.

关键词： Laser ablation

来源：评论

学校读者我要写书评

暂无评论

Digital control Design for the Boiler Drum BDT921

引用

Journal of Mechanics engineering and Automation 2011年第5期1卷 392-397页

作者： Tatang Mulyana Mohamad Nor Mohd Than Dirman Hanafi Afrodi Ali Control Laboratory Department of Mechatronics and Robotics Engineering Faculty of Electric and Electronic Engineering

A boiler drum BDT921 that is installed in the control Laboratory, department of Mechatronics and robotics engineering, Faculty of Electric and Electronic engineering, Universiti Tun Hussein Onn Malaysia （UTHM） is being used as a model plant to achieve the digital control system since its analog. Implementing a digital system to boiler quite a though work. This paper covers analysis from the experiment done to match with digital design that will be implemented to the real system. The digital control design will come up with the mathematical model and will be analyzed with MATLAB and SIMULINK software named as ＂Discrete Analysis ofBDT921 Simulation＂. A proportional integral and derivative （PID） controller is being chosen as the control element in discrete form as the real system is using the same control element. The output responses behave as the second order system with a bit difference in rise times and peak times compared with data obtained from experiment. With regarding to the analysis done, the digital control can be implemented and for further viewing, to be controlled digitally with computer in the control room.

关键词： Boiler drum digital control PID （proportional integral and derivative） controller MATLAB and SIMULINK.

来源：评论

学校读者我要写书评

暂无评论

Robust switching-type fuzzy control for active magnetic bearing system

Robust switching-type fuzzy control for active magnetic bear...

引用

13th IASTED International Conference on Intelligent Systems and control, ISC 2011

作者： Sung, Hwa Chang Park, Jin Bae Joo, Young Hoon Department of Electrical and Electronic Engineering Yonsei University Seoul 120-749 Korea Republic of Department of Control and Robotics Engineering Kunsan National University Kunsan Chonbuk 573-701 Korea Republic of

ISBN: (纸本)9780889868892

This paper proposes the robust switching-type fuzzy control for an active magnetic bearing (AMB) system. In order to design a feasible robust controller, the nonlinear systems are converted to the Takagi-Sugeno (T-S) fuzzy systems, which are used as a basic framework to synthesize the fuzzy controller. The tracking problem and the constraints on the magnitude of the control input, both of which are often required in design of controllers for nonlinear plants, are considered in the design of the robust switching-type fuzzy controller. All conditions for the synthesis of the controller are consistently formulated in linear matrix inequalities (LMIs). Simulation results of AMB system show that the performance of the designed fuzzy controller is quite splendid in both tracking and stabilizing the concerned system.

关键词： Robust control

来源：评论

学校读者我要写书评

暂无评论

Adaptive and repetitive controller for robotic manipulators with slowly updating scheme using B-spline shape function

Adaptive and repetitive controller for robotic manipulators ...

引用

2011 IEEE International Conference on robotics and Biomimetics, ROBIO 2011

作者： Rakprayoon, Pannatee Sanposh, Peerayot Chayopitak, Nattapon Intelligent Mechatronics Automation Robotics and Control Laboratory Department of Electrical Engineering Kasetsart University Bangkok 10903 Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Pathumthani 12120 Thailand

ISBN: (纸本)9781457721373

This paper studies the real-time adaptive and repetitive control problem using the Desired Compensation Learning Law (DCLL) that has the advantage of robustness under the presence of unknown parameters with low memory requirement. The control structure of DCLL consists of a feedforward compensator that is designed by a linear combination of shape functions that is adaptable to parameter variations;hence the selection of appropriate shape functions plays an important role in the adaptive ability and accuracy of DCLL. In this study, the B-spline shape function is proposed to be used under the slowly updating scheme and the obtained results show that the robustness and accuracy of the tracking can be greatly improved even under payload variation and torque limits. © 2011 IEEE.

关键词： Interpolation

来源：评论

学校读者我要写书评

暂无评论

New simplified model for an under-actuated quadruped robot in bounding motion

New simplified model for an under-actuated quadruped robot i...

引用

2011 2nd International Conference on control, Instrumentation and Automation, ICCIA 2011

作者： Kazemi, Hamed Majd, Vahid Johari Moghaddam, Majid M. Intelligent Control Systems Laboratory School of Electrical and Computer Engineering Tarbiat Modares University Tehran Iran Robotics and Mechatronics Laboratory Mechanical Engineering Department Tarbiat Modares University Tehran Iran

ISBN: (纸本)9781467316903

In this paper, a quadruped robot is studied in bounding motion. A new simplified model of quadruped robot in bounding motion with four actuated and two unactuated joints is developed. The kinetic and potential energies of the under-actuated mechanical model of the quadruped robot are obtained and the dynamics of the robot model is derived using the Lagrangian method. It is shown that the dynamical equation of the proposed simplified model belongs to a class of second-order nonholonomic mechanical systems. The main motivation of this paper is to obtain quadruped model in bounding motion such that one can apply different control methods directly or after transformation in the obtained dynamic equations. Utilizing MATLAB, dynamics of the planar model has been simulated in backward and forward states. Physical parameters of the Little-Dog robot as an instance of the quadruped robot are considered in simulation The simulation is without control and therefore is unstable but it illustrates robot's manner in bounding motion before instability. © 2011 IEEE.

关键词： Potential energy

来源：评论

学校读者我要写书评

暂无评论

Natural trajectory based FES-induced swinging motion control

Natural trajectory based FES-induced swinging motion control

引用

IEEE International Conference on Mechatronics

作者： Ibrahim, B.S.K.K. Tokhi, M.O. Huq, M.S. Gharooni, S.C. Dept of Mechatronics and Robotics Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781612844350

The use of electrical signals to restore the function of paralyzed muscles is called functional electrical stimulation (FES). FES is a promising method to restore mobility to individuals paralyzed due to spinal cord injury. FES induced movement control is a significantly challenging area, mainly emanating from various characteristics of the underlying physiological/biomechanical system. An approach of fuzzy trajectory tracking control of swinging motion optimized with genetic algorithm is presented. The results show the effectiveness of the approach in controlling FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated to perform the swinging motion by controlling the amount of stimulation pulsewidth © 2011 IEEE.

关键词： Fuzzy logic

来源：评论

学校读者我要写书评

暂无评论

Fuzzy logic based cycle-to-cycle control of FES-induced swinging motion

Fuzzy logic based cycle-to-cycle control of FES-induced swin...

引用

International Conference on Electrical, control and Computer engineering

作者： Ibrahim, B.S.K.K. Tokhi, M.O. Huq, M.S. Gharooni, S.C. Dept. of Mechatronics and Robotics Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781612842288

FES induced movement control is a significantly challenging area due to complexity and non-linearity of musculo-skeletal system. The goal of this study is to design a cycle-to-cycle control of FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated by controlling the amount of stimulation pulsewidth. This time dependent behaviour is successfully compensated for using a cycle-to cycle fuzzy controller, which computes the amount of knee extension stimulation on the basis of the achieved flexion angle in previous cycles. The capability of fuzzy control in automatic generation of stimulation burst duration is assessed in computer simulations using a musculo-skeletal model. This paper presents the development of a fuzzy logic control scheme based on discrete-time cycle to cycle control strategies without predefined trajectory. The results show the effectiveness of the approach in controlling FES-induced swinging motion. © 2011 IEEE.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Diagnosis of actuator faults using LPV-gain scheduling techniques

Diagnosis of actuator faults using LPV-gain scheduling techn...

引用

AIAA Guidance, Navigation and control Conference 2011

作者： Varga, Andreas Hecker, Simon Ossmann, Daniel Department of System Dynamics and Control Institute of Robotics and Mechatronics DLR Oberpfaffenhofen D-82234 Wessling Germany Department of Electrical Engineering and Information Technology University of Applied Sciences Munich D- 80335 Munich Germany

ISBN: (纸本)9781600869525

We present a new approach for the synthesis of robust fault detection filters for the model based diagnosis of actuator faults. The underlying synthesis model is a linear pa- rameter varying (LPV) description obtained using a combination of analytic and numerical parameter fitting techniques. The actuator LPV model contains uncertain parameters which are partly measurable, thus can be used for gain scheduling, and partly not measur- able, for which robustness must be ensured. The detector synthesis approach is basically a parametric nullspace method combined with min-max parameter fitting. The synthesis technique is applied to the diagnosis of two classes of actuator faults for a civil aircraft: elevator runaway and elevator jamming at null position. © 2011 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Elevators

来源：评论

学校读者我要写书评

暂无评论

Detection and tracking experiments in various environments

Detection and tracking experiments in various environments

引用

International Conference on Advanced robotics (ICAR)

作者： Levente Tamas Cosmin Marcu Robotics Research Group Department of Control Engineering Technical University of Cluj Napoca Romania

This paper presents the details of several mobile robot experiment designs including indoor, outdoor and urban variants. The aim of the paper is to give insights to setting up these tracking experiments covering both the software and hardware components as well as the application details. Beside these aspects the references to the perception, tracking and estimation parts are also pointed out for a wheel based mobile robots, bicycles and auto vehicles in various scenarios covering both indoor and outdoor variants.

关键词： Global Positioning System Robot sensing systems Mobile robots Estimation Hardware Software

来源：评论

学校读者我要写书评

暂无评论

Electronic design for portable electrical capacitance sensor: A multiphase flow measurement

Electronic design for portable electrical capacitance sensor...

引用

IEEE International Conference on Mechatronics

作者： Mohamad, E. Johana Marwah, O. M. Faizan Rahim, Ruzairi Abdul Rahiman, Mohd Hafiz Fazalul Muji, Siti Zarina Mohd Dept of Mechatronic and Robotics Engineering Faculty of Electrical and Electronic Engineering Malaysia Dept of Manufacturing and Industrial Engineering Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussien Onn Malaysia Pt. Raja Bt. Pahat Johor Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

ISBN: (纸本)9781612844350

The earlier research shows that the electrical capacitance sensor through the tomography technique is applicable in flow visualization or image reconstruction, named as Electrical Capacitance Tomography (ECT). ECT can be used for imaging industrial multi-component processes involving nonconducting fluids and solids in pipelines. The electrical capacitance sensor is a non-invasive device that uses non-intrusive technique to measure the concentration of flow inside a closed pipe by measuring variations in the dielectric permittivity of the material. The capacitance of the sensor changes when the mean dielectric constant between the electrodes varies due to variations in the percentage of gas and liquid flowing in the pipe. The acquired concentration profile that obtains from capacitance measurements is able to imaging liquid and gas mixture in pipelines, meanwhile the system development is designed to attach on a vessel. The electrode plates which act as the sensor previously has been assemble fixed on the pipeline, thus it causes difficulty for the production to have any new process installation in the future. Therefore on-board sensing plate offers a new design and idea on ECT system which is portable to be assembled in different diameter sizes of pipeline, and it's flexible to apply in any number due to different size of pipeline without redesign the sensing module. The on-board sensing plate development contains signal conditioning circuit and sensing electrode built in a single module (embedded on single plate). In this paper, the details on fabricating the sensors electrodes, had been described, including signal conditioning circuit/electronic part of measurement, such as stray immune capacitance measurement circuit, amplifying circuit, AC to DC converter circuit and filter circuit. © 2011 IEEE.

关键词： Electrodes

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：