检索结果-内蒙古大学图书馆

IEEE Conference on control Technology and Applications (CCTA)

作者： M. Boerlage M. Steinbuch P. Lambrechts M. van de Wal Faculty of Mechanical Engineering Control Systems Technology Group The Netherlands Mechatronics Research Philips CFT Eindhoven Netherlands Philips CFT Mechatronics Research The Netherlands

This paper considers model-based feedforward for motion systems. The proposed feedforward controller consists of an acceleration feedforward part and an inverse dynamics model of flexible modes. Based on analysis and H/sub /spl infin// model-based feedforward design, the inverse dynamics can be restricted to a second order filter in the form of a skew notch even if the motion system has more parasitic modes. The benefit of this is an on-line tuning possibility. Tracking errors and settling times can be reduced significantly compared to acceleration feedforward.

关键词： Acceleration Servomechanisms Adaptive control Motion control control systems Filters Feedback Robust stability Tracking Mechanical engineering

来源：评论

学校读者我要写书评

暂无评论

Solution to the general robust strictly positive real synthesis problem for polynomial segments

Solution to the general robust strictly positive real synthe...

引用

2003 European control Conference, ECC 2003

作者： Yu, Wensheng Wang, Long Ackermann, Jürgen Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing100080 China Center for Systems and Control Department of Mechanics and Engineering Science Peking University Beijing100871 China Robust Control Group Institute of Robotics and Mechatronics German Aerospace Center DLR-Oberpfaffenhofen Postfach 1116 WesslingD-82230 Germany

For any two n-th order polynomials a(s) and b(s), the Hurwitz stability of their convex combination is necessary and sufficient for the existence of a polynomial c(s) such that c(s)/a(s) and c(s)/b(s) are both strictl... 详细信息

ISBN: (纸本)9783952417379

关键词： Polynomials

来源：评论

学校读者我要写书评

暂无评论

Research on Characteristics of Superposed Two Straight Fringe Light Fields

Research on Characteristics of Superposed Two Straight Fring...

引用

作者： Chu, Xingchun Lu, Haibao Yu, Zhixiong Inst. of Mechatronics Eng./Automat. Natl. Univ. of Defence Technology Changsha Hunan 410073 China Automatic Control Room Academe of Engineering Project Chief Department of Equipment Beijing 100028 China

Superposition of two periodic straight fringe light fields (SFLF) results in striking spatial composed patterns that is similar to moiré patterns. The mathematical model for superposition of two SFLF with a little angle inclined to each other is established. The results of simulation show that the period width of composed patterns is proportional to the period width of SFLF. The contrast and maximum intensity of composed patterns is larger than that of SFLF. Different cases are discussed in experiment. The experimental results are presented and they coincide well with the simulation results.

关键词： Electromagnetic wave interference

来源：评论

学校读者我要写书评

暂无评论

Development of the Homing and Docking Algorithm for AUV

Development of the Homing and Docking Algorithm for AUV

引用

Proceedings of the Thirteenth (2003) International Offshore and Polar engineering Conference

作者： Hong, Young-Hwa Kim, Jung-Yup Lee, Pan-Mook Jeon, Bong-Hwan Oh, Kyu-Hyun Oh, Jun-Ho Machine Control Laboratory Department of Mechanical Engineering Korea Adv. Inst. of Sci./Technology Daejeon Korea Republic of Ocean Development System Laboratory KRISO KORDI Daejeon Korea Republic of Department of Mechatronics Samsung Heavy Industries Daejeon Korea Republic of

Path generation algorithms for AUV's homing and docking are presented. Optimization technique with a proper cost function is given for the homing process, and prediction algorithm for 1st stage-docking process. Dock position and pose estimation algorithm using geometric and perspective relationship of circle in 3-dimention space and ellipse in projected 2-D plane is introduced for real time vision tracking algorithm of 2nd stage-docking process. Simulations using MATLAB program and experiments for dock position and pose estimation algorithm show that robust estimation algorithm can get practically exact pose and position of dock.

关键词： Remotely operated vehicles

来源：评论

学校读者我要写书评

暂无评论

A fuzzy track-keeping autopilot for ship steering

引用

Proceedings of the Institute of Marine engineering, Science and Technology Part A: Journal of Marine engineering and Technology 2003年第2期 23-29页

作者： Omerdic, E. Roberts, G.N. Vukic, Z. Mechatronics Research Centre University of Wales College Newport United Kingdom University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia Department of Mechatronics United Kingdom IFAC Technical Committee on Marine Systems United Kingdom IFAC Technical Committee on Mechatronic Systems United Kingdom Department of Control Engineering University of Zagreb Faculty of Electrical Engineering and Computing Croatia IEEE Control Systems/Robotics Automation Society Croatia

In this paper a non-linear fuzzy autopilot for ship track-keeping is presented. The proposed autopilot has four inputs (actual and desired heading, rate of change of heading and offset from the desired path) and one output (command rudder angle). The track-keeping problem is decomposed into two subtasks: (i) followthe desired heading, and (ii) bring the ship onto the desired path and keep tracking. Internally, the autopilot consists of two autopilots that fulfil these tasks simultaneously. The proposed control scheme has been verified using a non-linear model of a Mariner-class vessel and steering mechanism under the influence of wave and current disturbances. Results presented show how such a control strategy enables improved tracking performance.

关键词： Ships

来源：评论

学校读者我要写书评

暂无评论

Time-frequency analysis of a motion system with learning control

Time-frequency analysis of a motion system with learning con...

引用

American control Conference (ACC)

作者： I. Rotariu R. Ellenbroek M. Steinbuch Mechatronics Research Philips Center for Industrial Technology Eindhoven Netherlands Mechanical Engineering Control Systems Technology Eindhovan University of Technology Eindhoven Netherlands

Iterative learning control (ILC) is a known technique for improving the performance of systems or processes that operate repetitively over a fixed time interval. ILC generates a feed-forward signal effective for providing good tracking control. Experience with ILC algorithm applied to the wafer stage of a wafer scanner motion system has shown that ILC has liability to deal with limited performance in the face of position dependent dynamics, with the fact that ILC does not account for setpoint trajectory changes and with stochastic effects. The goal of the research presented in this paper is to integrate ILC applied to the wafer stage motion system with time-frequency analysis. This provides insight into the above mentioned ILC shortcomings when the learning control technique is applied on the considered motion system. We examine the suitability of a time-frequency adaptive filtering design for the learned feed-forward when applied to the wafer stage setup.

关键词： Time frequency analysis Motion analysis Motion control control systems Feedforward systems Stochastic processes Signal generators Iterative algorithms Nonlinear dynamical systems Servomechanisms

来源：评论

学校读者我要写书评

暂无评论

Iterative learning control for variable setpoints, applied to a motion system

Iterative learning control for variable setpoints, applied t...

引用

European control Conference (ECC)

作者： Iuliana Rotariu Rogier Ellenbroek Gregor van Baars Maarten Steinbuch Mechatronics Research Philips Center for Industrial Technology Eindhoven MD The Netherlands Mechanical Engineering Control Systems Technology Eindhoven University of Technology Eindhoven MB The Netherlands

Iterative Learning control (ILC) is a known technique for improving the performance of systems or processes that operate repetitively over a fixed time interval. ILC generates a feedforward signal effective for providing good tracking control. However, there still exist a number of problems which hinder extensions of ILC schemes. The major obstacle is perhaps the requirement that the trajectory (or repetitive disturbance) must be strictly repeatable over operations. ILC has also liability to deal with stochastic effects. This paper presents the design and the implementation of a time-frequency adaptive ILC that is applicable for motion systems which execute the same kind of repetitive tasks. For the motion system, we show that the adaptive algorithm we propose leads to design one (learned) feed-forward signal suitable for different setpoints. We demonstrate that, when implementing time-frequency adaptive ILC, very good time performance (tracking errors) is obtained. The proposed algorithm converges faster than standard ILC. With time-frequency adaptive ILC noise amplification is reduced.

关键词： Time-frequency analysis Trajectory Noise Bandwidth Frequency control Standards

来源：评论

学校读者我要写书评

暂无评论

A robust general Voronoi graph based SLAM for a hyper symmetric environment

A robust general Voronoi graph based SLAM for a hyper symmet...

引用

IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： Nakju Lett Doh Wan Kyun Chung SungOn Lee SangRok Oh BumJae You Robotics & Bio-Mechatronics Laboratory Mechanical Engineering Pohang University of Science and Technology Pohang South Korea Intelligent System Control Laboratory Korea Institute of Science and Technology Seoul South Korea

ISBN: (纸本)0780378601

In this paper, an algorithm for hyper symmetric environment simultaneous localization and mapping (SLAM) is developed based on the generalized Voronoi graph. The hyper symmetric environment is a challenging environment for the SLAM and the most difficult problem on this is a data association. To redeem this problem, we propose three techniques. The first one is a breadth first node navigation algorithm which highly reduces the complexity of the data association. The second scheme is an odometry calibration method which converts untrustable odometry into reliable one. The third method is a multi layered data association scheme. We integrate above three techniques into one framework and propose a SLAM algorithm for the hyper symmetric environment. The simulation result shows that the proposed algorithm can successfully cover a large hyper symmetric environment under 20% odometry uncertainty.

关键词： Robustness Simultaneous localization and mapping Navigation Calibration Uncertainty Topology Robots Biomechatronics Mechanical engineering Intelligent systems

来源：评论

学校读者我要写书评

暂无评论

Smart card terminal systems using ISO/IEC 7816-3 interface and 8051 microprocessor based on the system-on-chip

引用

18th International Symposium on Computer and Information Sciences, ISCIS 2003

作者： Song, Won Jay Kim, Won Hee Kim, Bo Gwan Ahn, Byung Ha Choi, Munkee Kang, Minho Optical Internet Research Center and Grid Middleware Research Center Information and Communications University 305-732 Korea Republic of VLSI and CAD Labs Department of Electronics Engineering Chungnam National University 305-764 Korea Republic of Systems Control and Management Labs Department of Mechatronics KwangJu Institute of Science and Technology 500-712 Korea Republic of

ISBN: (纸本)3540204091

A smart card terminal designed and developed to communicate with smart cards via a single System-on-Chip (SoC) is described in this paper. This proposed and developed SoC-based smart card terminal, designed with the Verilog Hardware Description Language (HDL) and the Simulation Program with Integrated Circuit Emphasis (SPICE), can be achieved and operated by proper connections to a Personal Computer (PC) and by dedicated software drivers that control the communication protocol between the smart card and the card terminal. We have also constructed an integrated test environment to verify the system developed. Through this test environment, we should be able to check all operational functions of the SoC-based developed smart card terminal microprocessor and smart card interface. The results showed that our test board operated successfully. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Smart cards

来源：评论

学校读者我要写书评

暂无评论

Conditional access module systems for digital contents protection based on hybrid/fiber/coax CATV networks

引用

18th International Symposium on Computer and Information Sciences, ISCIS 2003

ISBN: (纸本)3540204091

In this paper, we have proposed the merging of the OpenCable reference model with the smart card interface defined by ISO/IEC 7816-3 and have implemented a new Conditional Access System (CAS) using this interface along with a Personal Computer Memory Card International Association (PCMCIA) interface. In addition, we have also designed the hardware architecture of the Pointof- Deployment (POD) security module, designed with the Verilog HDL, using the above two interfaces. The designed POD security module has an embedded 32-bit Reduced Instruction Set Computer (RISC) microprocessor that manages applications, such as an MPEG-2 filter, descrambler, and Data Encryption Standard (DES).We have tested this modeled and designed system using a prototype and show satisfactory simulation results. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Personal computers

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：