检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： Christopher G. Mayhew Ricardo G. Sanfelice Andrew R. Teel Center for Control Engineering and Computation Electrical and Computer Engineering Department University of California Santa Barbara CA USA Laboratory for Information and Decision Systems Massachusetts Institute of Technology MA USA

ISBN: (纸本)9781424431236

A family of hybrid control algorithms is developed that steer a nonholonomic autonomous vehicle to the source of a scalar signal present in the environment. In an idealized setting, we develop a general hybrid control scheme that globally asymptotically stabilizes the vehicle position about the source. Pursuing a practical implementation, a series of perturbations to the family of controllers is introduced, resulting in a semi-global practical stability of the vehicle position about the source. An example of a recently developed conjugate direction-based controller fitting into this family is developed and demonstrated by simulation and experiment.

关键词： Robustness Remotely operated vehicles Mobile robots Robust control Stability Position measurement Noise measurement Working environment noise Chemical sensors Current measurement

来源：评论

学校读者我要写书评

暂无评论

Storage optimization through code size reduction for digital signal processors

Storage optimization through code size reduction for digital...

引用

Embedded Systems for Real-Time Multimedia (ESTIMedia)

作者： Hassan Salamy J. Ramanujam Department of Electrical and Computer Engineering and Center for Computation and Technology Louisiana State University Baton Rouge LA USA

Most modern digital signal processors (DSPs) provide multiple address registers and a dedicated address generation unit (AGU) which performs address generation in parallel to instruction execution. There is no address computation overhead if the next address is within the auto-modify range. A careful placement of variables in memory is utilized to decrease the number of address arithmetic instructions and thus to generate compact and efficient code. The simple offset assignment (SOA) problem concerns the layout of variables for machines with one address register and the general offset assignment (GOA) deals with multiple address registers. Both these problems assume that each variable needs to be allocated for the entire duration of a program. Both SOA and GOA are NP-complete. In this paper, we present an effective heuristic for the general offset assignment problem with variable coalescing (CGOA) where two or more non-interfering variables can be mapped into the same memory location. Results on several benchmarks show the significant improvement of our solution compared to other heuristics. Results were further improved using a simulated annealing (SA).

关键词： Digital signal processors Registers Semiconductor optical amplifiers Digital signal processing Arithmetic computer aided instruction Signal generators Simulated annealing computer architecture Concurrent computing

来源：评论

学校读者我要写书评

暂无评论

Robust source-seeking hybrid controllers for nonholonomic vehicles

Robust source-seeking hybrid controllers for nonholonomic ve...

引用

2008 American control Conference (ACC), vol.7

We develop a hybrid controller that drives a nonholonomic vehicle to the source of a radiation-like signal. The control signal depends only on measurements of the signal, which may be corrupted by noise, and internal states of the controller. The control strategy is inspired by a line minimization-based algorithm for unconstrained optimization of nonlinear functions without gradient information. We state the main properties of the algorithm and then discuss its implementation in a hybrid controller that coordinates the optimization algorithm with vehicle steering. We present semi-global practical convergence and stability results for the closed-loop system. These results are illustrated by simulation and experiment.

关键词： Robust control Remotely operated vehicles Mobile robots Noise measurement Convergence Vehicle driving Working environment noise Position measurement Tin Noise robustness

来源：评论

学校读者我要写书评

暂无评论

Towards effective automatic parallelization for multicore systems

Towards effective automatic parallelization for multicore sy...

引用

International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Uday Bondhugula Muthu Baskaran Albert Hartono Sriram Krishnamoorthy J. Ramanujam Atanas Rountev P. Sadayappan Department of Computer Science and Engineering Ohio State Uinversity Columbus OH USA Department of Electrical & Computer Engineering and Center for Computation & Technology Louisiana State University USA

The ubiquity of multicore processors in commodity computing systems has raised a significant programming challenge for their effective use. An attractive but challenging approach is automatic parallelization of sequential codes. Although virtually all production C compilers have automatic shared-memory parallelization capability, it is rarely used in practice by application developers because of limited effectiveness. In this paper we describe our recent efforts towards developing an effective automatic parallelization system that uses a polyhedral model for data dependences and program transformations.

关键词： Multicore processing Production Bonding Optimizing compilers computer science Microarchitecture Parallel processing Parallel architectures Programming profession computer applications

来源：评论

学校读者我要写书评

暂无评论

Optimal address register allocation for arrays in DSP applications

Optimal address register allocation for arrays in DSP applic...

引用

Embedded Systems for Real-Time Multimedia (ESTIMedia)

作者： Hassan Salamy J. Ramanujam Department of Electrical and Computer Engineering and Center for Computation and Technology Louisiana State University Baton Rouge LA USA

Optimizing the code size of a digital signal processing application is a crucial step in generating high quality and efficient code for embedded systems. Most modern digital signal processors (DSPs) provide multiple address registers and a dedicated address generation unit (AGU) that provides address generation in parallel to instruction execution. There is no address computation overhead if the next address is within the auto-modify range. Many DSP algorithms have an iterative pattern of references to array elements within loops. Thus, a careful assignment of array references to address registers reduces the number of explicit address register instructions as well as the execution cycles. In this paper, we present an optimal integer linear programming (ILP) formulation for the address register allocation problem (ARA) with code reconstructing techniques. Genetic algorithm is also used to solve the ARA problem to get a near-optimal solution in a reasonable amount of time for big embedded applications. Results on several benchmarks show the effectiveness of our techniques compared to other techniques in the literature.

关键词： Digital signal processing Registers Arithmetic Signal generators Application software Embedded system Digital signal processors Signal processing algorithms Iterative algorithms Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Revisiting the design of vertically polarized slotted waveguide array antenna

Revisiting the design of vertically polarized slotted wavegu...

引用

2008 Asia Pacific Microwave Conference, APMC 2008

作者： Alves, Alexandre M.P. Hernández-Figueroa, Hugo E. Oliveira, Luciano P. Barbin, Silvio E. Moreira Neto, João R. Department of Microwaves and Optics School of Electrical and Computer Engineering University of Campinas Brazil Department of Telecommunications and Control Polytechnic School of Engineering University of São Paulo Brazil Center for Information Technology Renato Archer Brazil Orbisat da Amazônia S.A. Brazil

来源：评论

学校读者我要写书评

暂无评论

IEEE Transactions on Haptics: Editorial

引用

IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Towards net-centric system of systems robotics in air, sea and land

Towards net-centric system of systems robotics in air, sea a...

引用

IEEE International Conference on System of Systems engineering (SoSE)

作者： Ted Shaneyfelt Sevki Erdogan Azim Maredia Gnanadeep Vemuri Bhargavaram Pachala Dong Yue Sohel Karovalia Ming-Zhu Lu Shi-Zhong Yang Chenyu Gao Autonomous Control Engineering Center Electrical and Computer Engineering Department University of Texas San Antonio TX USA

This paper investigates how we can work towards building net-centric swarms of land, sea and air robots working together to accomplish a common goal. The goal is to bring together swarms of robots from all three sectors to safely benefit mankind without increasing dangers in the process. Several platforms are explored for simulation to investigate swarm robotics within heterogeneous environments.

关键词： Robot kinematics Orbital robotics Robot sensing systems Bandwidth Taxonomy Topology Personal digital assistants control engineering Automata Software systems

来源：评论

学校读者我要写书评

暂无评论

A Novel Dual Power Flow Wind Power Generation System

A Novel Dual Power Flow Wind Power Generation System

引用

11th International Conference on electrical Machines and Systems(第11届国际电机与系统会议)

作者： Ming Cheng Xikai Sun Longya Xu Wei Hua Engineering Research Center for Motion Control of MOE School of Electrical EngineeringSoutheast Un Department of Electrical & Computer Engineering The Ohio State University Columbus 43210 USA Engineering Research Center for Motion Control of MOE School of Electrical Engineering Southeast U

A novel dual power flow wind power generation system based on electrical variable transmission (EVT) is proposed which combines the advantages of direct-driven and non-direct-driven systems. In this paper, the principles of the dual power flow wind power generation system are presented. The dynamic model and operation modes of the double layer permanent magnet outer rotor based EVT are introduced. Furthermore, the operation processes and control strategies of the novel system are simulated and analyzed. An EVT prototype machine is designed and verified by finite element analysis (FEA).

关键词： Load flow Wind power generation Magnetic analysis Power system modeling Permanent magnets Rotors Process control Analytical models Prototypes Finite element methods

来源：评论

学校读者我要写书评

暂无评论

A QFT/EEAS Design of Multivariable Robust Adaptive controllers

引用

IFAC Proceedings Volumes 2008年第2期41卷 6154-6159页

作者： O. Namaki-Shoushtari A. Khaki Sedigh B. Nadjar Araabi Department of Electrical Engineering K.N. Toosi University of Technology Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

This paper presents a robust adaptive control design methodology for multi-input multi-output (MIMO) plants based on Quantitative Feedback Theory (QFT) and Externally Excited Adaptive System (EEAS), both of which are the novel ideas of Horowitz. Self Oscillating Adaptive Systems (SOAS) are proposed to mainly overcome the problem of large gain variations, which is important in certain applications. To further improve the SOAS design, the idea of EEAS was developed. Finally, combined QFT and EEAS proposed a robust adaptive controller for SISO uncertain plants. However, due to the complex design nature of the proposed combined methodology and the difficulty of an optimal design, this line of Horowitz's research was not followed further. In this paper, to overcome the above mentioned problems the design procedure is reformulated as a set of cost functions and constraints. Genetic Algorithms are then used to solve the optimal design. Also, QFT/EEAS design is extended to multivariable uncertain plants. Sufficient conditions are derived to assure the achievement of given off-diagonal performance. Then, the given main channel performance could be achieved by using SISO QFT/EEAS method. Simulation studies indicate the effective performance of the proposed QFT/EEAS MIMO design methodology. It is shown that the proposed approach can handle large plant parameter uncertainties with lower loop bandwidths.

关键词：

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：