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检索条件"主题词=computer algorithms"

共 996 条记录，以下是91-100 订阅

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Nonlinear Simulation on Parallel Drive System of Double Switched Reluctance Machines

Nonlinear Simulation on Parallel Drive System of Double Swit...

引用

21st IEEE International Symposium on Industrial Electronics (ISIE)

作者： Chen, H. Gan, C. Gao, R. China Univ Min & Technol Xuzhou 221116 Peoples R China

ISBN: (纸本)9781467301589

The paper presented a control scheme for parallel drive system of double Switched Reluctance machines. The fuzzy control algorithm is adopted in the main controller for closed-loop rotor speed control of main machine. The sliding mode control algorithm is adopted in the subordinate controller for synchronized rotor speed and loads equilibrium distribution between main machine and subordinate machine. The deviation between the given rotor speed and the feedback rotor speed of the main machine, the variation from the deviation of the rotor speed are the input parameters of the main fuzzy controller. The duty ratio of pulse width modulation signal of the main controller can be gained by the fuzzy control algorithm. The deviation between the average values of DC bus supply current for main power converter and the average values of DC bus supply current for subordinate power converter, and the deviation between the actual rotor speed of the main machine and the subordinate machine are the input parameters of the subordinate VSS controller. The duty ratio of pulse width modulation signal of the subordinate VSS controller can be gained by the sliding mode control algorithm. The nonlinear simulation results of the system based on MATLAB-Simulink show that the advanced scheme is satisfied with the requirement for storage battery electric locomotives driven by the parallel drive system of double Switched Reluctance machines.

关键词： rotor speed Reluctance motors drive train stacking factor input parameter computer algorithms pulse width modulation signals master controller machine Controllers MAINS Secondary batteries

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Systematic approach to software related tasks in electric fuel-efficiency vehicle development 19

Systematic approach to software related tasks in electric fu...

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19th IEEE International Conference on Intelligent Engineering Systems (INES)

作者： Horvath, Erno Koros, Peter Szechenyi Istvan Univ Fac Comp Engn Gyor Hungary Szechenyi Istvan Univ Res Ctr Vehicle Ind Gyor Hungary

ISBN: (纸本)9781467379397

Nowadays software related tasks in experimental vehicle development are getting more and more attention. These tasks not only include the final product related software solutions such as the motor and the vehicle control algorithm or the telemetry system but even in the development process, applications are needed - for example on the motor test bench. The paper presents our ideas and solutions to software related tasks in vehicles for the whole development and validation process.

关键词： electric vehicles mechanical engineering computing electric fuel-efficiency vehicle development experimental vehicle development software related task systematic approach validation process Battery charge measurement Nickel Permanent magnet motors Software Synchronous motors Telemetry Vehicles mechanical engineering computing validation process vehicle synchronous motors Permanent magnet synchronous machines computer software Electric vehicles telemetry Nickel computer programs Telemetering systems Religious Missions Motor testing Fuel efficiency computer algorithms

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Nonlinear Model Predictive Control for Wheeled Mobile Robot in Dynamic Environment

Nonlinear Model Predictive Control for Wheeled Mobile Robot ...

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IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)

作者： Hsieh, Chung-Han Liu, Jing-Sin Acad Sinica Inst Informat Sci Taipei 11529 Taiwan

ISBN: (纸本)9781467325769

This paper address the set-point regulation problem of a nonholonomic wheeled mobile robot with obstacle avoidance in a known dynamic environment populated with static and moving obstacles subject to robot kinematic and dynamic constraints by using the nonlinear model predictive control in polar coordinate. The terminal state penalty, terminal state constraints, and the input saturation constraints are taken into consideration in this optimization problem to guarantee the closed-loop regulation performance and stability. Simulation results are shown for illustrating the effectiveness of the control algorithm in steering a nonholonomic wheeled mobile robot.

关键词： nonlinear model predictive control wheeled mobile robots computer algorithms Moving obstacles Obstacle avoidance kinematics stability simulation

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A DSP-BASED REAL-TIME SIMULATION EQUIPMENT FOR FAST MOTOR CONTROL DEVELOPMENT

A DSP-BASED REAL-TIME SIMULATION EQUIPMENT FOR FAST MOTOR CO...

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5th European DSP Education and Research Conference (EDERC)

作者： Olivieri, Carlo Di Leonardo, Lino Fabri, Giuseppe Tursini, Marco Univ Aquila Dept Elect & Informat Engn I-67100 Laquila AQ Italy

ISBN: (纸本)9781467345972;9781467345958

This work presents a rapid motor control prototyping technique based on the development of a real-time simulation environment structured on a DSP architecture. The considered case study refers to an Interior Permanent Magnet synchronous motor (IPM) drive arranging a field oriented speed control with the optimization of the torque-to-current ratio and the decoupling of the feeding voltages. The main topics of this work are related with the construction of the real-time simulation platform and with the implementation issues coming from the use of a hardware DSP-based setup. In particular it will be shown how such a kind of simulation architecture can model very closely the real behaviour of a controlled IPM drive and consequently how it can be used to properly tune the control algorithm without the needing of using the real motor drive saving this way a lot of deployment time.

关键词： real-time simulation control of movement computer algorithms Motor Control motor drives Velocity control DECOUPLING Permanent magnet synchronous machines Integrated Pest Management

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Foundations of Machine Learning[2nd ed] 2

引用

丛书名： Adaptive computation and machine learning series

2018年

作者： Mohri Mehryar Afshin Rostamizadeh and Ameet Talwalkar

ISBN: (纸本)9780262039406

A new edition of a graduate-level machine learning textbook that focuses on the analysis and theory of algorithms. This book is a general introduction to machine learning that can serve as a textbook for graduate students and a reference for researchers. It covers fundamental modern topics in machine learning while providing the theoretical basis and conceptual tools needed for the discussion and justification of algorithms. It also describes several key aspects of the application of these algorithms. The authors aim to present novel theoretical tools and concepts while giving concise proofs even for relatively advanced topics. Foundations of Machine Learning is unique in its focus on the analysis and theory of algorithms. The first four chapters lay the theoretical foundation for what follows; subsequent chapters are mostly self-contained. Topics covered include the Probably Approximately Correct (PAC) learning framework; generalization bounds based on Rademacher complexity and VC-dimension; Support Vector Machines (SVMs); kernel methods; boosting; on-line learning; multi-class classification; ranking; regression; algorithmic stability; dimensionality reduction; learning automata and languages; and reinforcement learning. Each chapter ends with a set of exercises. Appendixes provide additional material including concise probability review. This second edition offers three new chapters, on model selection, maximum entropy models, and conditional entropy models. New material in the appendixes includes a major section on Fenchel duality, expanded coverage of concentration inequalities, and an entirely new entry on information theory. More than half of the exercises are new to this edition.

关键词： Machine learning computer algorithms

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Low-cost Arduino based Architecture for Simulation and Control of Quadrotors

Low-cost Arduino based Architecture for Simulation and Contr...

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International Conference on Inventive Systems and Control (ICISC)

作者： Khavnekar, Aditya Gondalia, Jinil Shah, Dhruv NMIMS Univ Sch Technol Management & Engn Mumbai Maharashtra India

ISBN: (纸本)9781509047154

Quadrotor or popularly known as quadcopter is an unmanned flying robotic platform that is driven by four fixed rotors. Quadrotors serve as a perfect flying platform in an anonymous and intricate environments eliminating the need to jeopardize human life in such hazardous situations. Apart from serving as a stable flight stage, these can do breathtaking acrobatic and complex maneuvers that are beyond the scope of the conventional aerial vehicles. There has been a tremendous surge in funding for research and development of such Unmanned Aerial Vehicles (UAV) as the investors are very well aware of the influence these robots have in military as well as civilian market. However the flip side to these overwhelming abilities the quadrotors have is the need for a robust and an efficient control model. The system designing process is a complex integration of aero-modeling and apt control techniques for stability. Multiple parameters need to be co-ordinated in real time for a smooth control of a multi rotor vehicle. This generally results in complex algorithms which increase computation requirements that can be costly. On the other hand cost reduction implies limitations in performance or poor control. This paper focuses to solve these challenges by dramatically simplifying the complexity of control algorithms without compromising on performance parameters of the quadrotor following strict cost constraints. We streamline the mathematical model simulations and the use of PD and PID control techniques by constraint based optimization that results in a simple, cost-effective and a robust control model. Through rigorous simulations and testing we not only obtain a faithful control model but also execute a self-leveling feature making the quadrotor smart. We also discuss the future possibilities for low-cost autonomous navigation in indoor environments.

关键词： Quadrotors UAV complex algorithms drone honey bees Unmanned Aerial Vehicle Standing Orders simulating Building construction ARCHITECTURE autonomous navigation indoor environment computer algorithms characteristic parameter flight platforms

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Connected Underwater Robots: Theory and Practice 16

Connected Underwater Robots: Theory and Practice

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Proceedings of the 2015 International Conference on Collaboration Technologies and Systems

作者： Stilwell, Daniel J. Virginia Tech Bradley Dept Elect & Comp Engn Blacksburg VA USA

ISBN: (纸本)9781467376488

Reliable subsea communication is the principal technical challenge that limits the ability of underwater vehicles to collaboratively perform tasks. The subsea communication channel is extremely low bandwidth and suffers from latencies and frequent dropouts. We present fundamental advances in network theory and corresponding distributed estimation and control algorithms that enable autonomous underwater vehicles to cooperate despite infrequent communication between vehicles. We describe the practical challenges of subsea operations and how our approach distributed data fusion and decentralized control addresses these challenges. We also discuss advances in stochastic graph theory that enable us to model the sparse, time-varying network topology available underwater in a manner suitable for control design. The practical utility of our approach has been verified during field trials in which a team of autonomous underwater vehicles cooperatively localized the source of an acoustic signal.

关键词： underwater vehicles Autonomous underwater vehicles Subsea Underwater Underwater robots Network theory decentralised control audio signals computer algorithms Data fusion Graph theory Distress vehicle field experimentation

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Research and Improvement of Congestion Control algorithms Based on TCP Protocol

Research and Improvement of Congestion Control Algorithms Ba...

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World Congress on Software Engineering

作者： Han Bing Fang Ying-lan Li Ye-bai N China Univ Technol Dept Comp Beijing Peoples R China

ISBN: (纸本)9780769535708

This paper mainly discuss related algorithm of avoid congestion in the area of congestion control agreement on TCP protocol. It has also illuminated in condition of network congestion, the service quality significance of improving network according to the influence of grouping overlap transmission mechanism by the overtime. Via to research and analysis of traditional rapid overlap transmission mechanism and algorithm, it bring forward new solution based on this. Compared to experiments, the improved slow start and congestion avoidance algorithm can not only better settle congestion question but also make better use of network resource and improve the whole performance of network.

关键词： Transmission control protocol Web resources TRANSFER MECHANISM Network Congestion computer algorithms congestion avoidance

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Design of the Active Split Offset Casters based Omni-directional Vehicle in High Acceleration Condition

Design of the Active Split Offset Casters based Omni-directi...

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IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)

作者： Kim, Han-Gyeol Huan, Do Ngoc Park, Jong-Chan Kwon, Dong-Soo Korea Adv Inst Sci & Technol ME & HRI Res Ctr Taejon 305701 South Korea Korea Adv Inst Sci & Technol Human Robot Interact Res Ctr Dept Mech Engn Taejon 305701 South Korea

ISBN: (纸本)9781467325769

Up to now, most of studies about omni-directional vehicles have been focusing on omni-directional maneuverability. In contrast, this research would investigate deeply the operation of an omni-directional mobile robot that is able to move with high acceleration. In order to fulfill that goal, the vehicle utilizes the structure of Active Split Offset Casters (ASOC). This paper is mainly focused on hardware design and control algorithm to achieve high acceleration while preserving the vehicle's isotropy and optimum controllability.

关键词： high acceleration Caster Device Component Omnidirectional mobile robot vehicle computer hardware design computer algorithms offsets

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Implementation of a Bug Algorithm in the E-puck from a Hybrid Control Viewpoint

Implementation of a Bug Algorithm in the E-puck from a Hybri...

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15th International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Marin, Leonardo Valles, Marina Valera, Angel Albertos, Pedro Univ Politecn Valencia Inst Univ Automat & Informat Ind Dept Syst Engn & Control E-46071 Valencia Spain

ISBN: (纸本)9781424478279

In this paper, the implementation in the e-puck robot of an algorithm to keep going in a trajectory while evading fixed obstacles is presented. A review of some existing algorithms for trajectory tracking with obstacles avoidance is done. Also the basic characteristics of the mobile robot e-puck and the programming environment used to implement the control algorithm and prove the performance of the robot are summarized. By modeling the kinematics of the robot and simulating the implementation of the algorithm, the good performance of the control in both the simulated environment and the real robot in different surroundings are shown. The effects of different environmental factors in the performance of the robot are analyzed. This leads to suggest some algorithm improvements as a matter of future works.

关键词： Robot computer algorithms hybrid control Simulated Environment programming environments trajectory tracking algorithms Comment trajectory

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