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检索条件"主题词=Computer Algorithms"

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Coordination Control on the Electro-Hydraulic Braking System of Electric Vehicles

Coordination Control on the Electro-Hydraulic Braking System...

引用

International Conference on computer Science and Network Technology

作者： Syed Attiq Ur Rehman Gillani Fenzhu Ji School of Mechanical Engineering and Automation Beihang University Beijing 100191 China School of Transportation Science and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781467381741

To make electro-hydraulic braking systems table in electric vehicles (EV), this paper presents a coordination control strategy between motor braking system (MBS) and hydraulic braking system (HBS), including braking mode switching strategy and coordination control strategy of the braking force. The distribution strategy between motor braking force (MBF) and hydraulic braking force (HBF) is based upon demanding braking torque (DBT), consideration of the battery SOC, vehicle braking strength and the road adhesion coefficient. The developed models and the control algorithms are programmed by using Matlab/Simulink and with AVL-Cruise software platform established EV electric-hydraulic braking system simulation model and perform simulation research of braking stability in different kind of roads, and different braking intensity. Simulation result shows that: during low-intensity braking, MBS can meet the needs of the vehicle, and the HBS does not work;during moderate braking process, the MBS and HBS work coordinately, and the braking process is stable;during highintensity braking process or high battery SOC, MBS doesn't work and the HBS provides the sole braking force. Therefore, the coordination braking control strategy can ensure the stability of vehicle during the braking process.

关键词： electric vehicles electro-hydraulic braking system coordination control vehicle stability control Electric vehicles coordinated control Vehicle Stability Control Braking control strategy Braking systems PPP1R12A gene main bang suppression computer algorithms braking force distribution strategy ELECTROHYDRAULIC

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Sliding mode control of a single-phase LCL full-bridge rectifier

Sliding mode control of a single-phase LCL full-bridge recti...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Domingo Biel Arnau Doria-Cerezo Enric Fossas Dept. Electronic Eng. and Inst. Industrial and Control Eng. Polytechnical University of Catalonia Dept. Electrical Eng. and Inst. Industrial and Control Eng. Polytechnical University of Catalonia Dept. Automatic Control and Inst. Industrial and Control Eng. Polytechnical University of Catalonia

ISBN: (纸本)9781479902255

This paper presents a dynamic analysis and the control design for a singe-phase full bridge rectifier with a LCL filter. The control algorithm is based on the sliding mode control techniques that provides good tracking performances and robustness against parameter variations. The control design also considers the connection to a non ideal power network with a grid impedance as well as higher harmonics components in the voltage. The control law has been tested in numerical simulations with satisfactory results (also in the case of non ideal power grid).

关键词： AC-DC power converters Rectifier Nonlinear control systems Sliding Mode Control Variable structure systems Rectifiers Nonlinear control systems bridge rectifier Power grids design control grid impedance computer algorithms control law

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A Mechatronic System Design Case Study: Control of a Robotic Swarm Using Networked Control algorithms

A Mechatronic System Design Case Study: Control of a Robotic...

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Annual IEEE International Systems Conference

作者： Peymon Gazi Mo Jamshidi Aleksandar Jevtic Diego Andina Dept. of Electrical Engineering College of Engineering University of Texas at San Antonio Group for Automation in Signals and Communications Technical University of Madrid

ISBN: (纸本)9781424458820

This paper describes the use of networked control algorithms in designing a robotic swarm. The main goal of a robotic swarm is to divide one task into multiple simpler tasks. Have we designed a swarm this way, the main challenge would be the problem of delay in communication between individual robots. This paper also goes through the Swarm Intelligence concept and proposes the Network Formation Control algorithms to control a group of robots.

关键词： Swarm robotics Swarm intelligence Networked control systems Particle swarm optimization Networked control systems computer algorithms dike swarms Robot Microelectromechanical devices System design

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Distributed Constrained Connectivity Control for Proximity Networks based on a Receding Horizon Scheme

Distributed Constrained Connectivity Control for Proximity N...

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American Control Conference

作者： Touraj Soleymani Emanuele Garone Marco Dorigo Technische Universitat Munchen Barer Str. 21 80333 Munich Germany Universite Libre de Bruxelles Ave. F. Roosevelt 50 1050 Brussels Belgium

ISBN: (纸本)9781479917730

In this paper, we propose a distributed constrained connectivity control algorithm for a network of dynamically decoupled agents with constrained discrete-time linear dynamics. This control algorithm works based on a receding horizon control (RHC) scheme and acts as a middleware that modifies the set-points defined by the user or by high-level control units whenever their direct application would violate system constraints. To guarantee the connectivity of the communication graph, the algorithm enforces that a specific spanning tree exists at each time. The algorithm is allowed, under certain conditions, to switch between interaction graphs in order to enhance system performance. Among all possible spanning trees, we propose to use the Euclidean Minimum Spanning Tree (EMST), and we study its advantages. The overall algorithm is described, and some of its properties are pointed out. Some simulations conclude the paper and show the effectiveness of the proposed method.

关键词： Middleware connectivity System performance Spanning tree Horizon computer algorithms Communication Research Distribute algorithms

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Non-Equilibrium Transient Trajectory Shaping Control via a Three-Stage Switching Method for a Class of Nonlinear Systems

Non-Equilibrium Transient Trajectory Shaping Control via a T...

引用

2010 49th IEEE Conference on Decision and Control

作者： Fengjun Yan Junmin Wang Department of Mechanical and Aerospace Engineering The Ohio State University Columbus Ohio 43210

ISBN: (纸本)9781424477456

This paper presents a three-stage switching control method to deal with the non-equilibrium transient trajectory shaping (NETTS) control problem for a class of nonlinear systems. Through this method, the system tracking error non-equilibrium transient trajectory can be effectively shaped by constant boundaries and two pre-designed, exponentially-converging bounds. The tracking error is handled by a Barrier Lyapunov Function (BLF) in the first stage. Once the derivative of the tracking error reaches a desired negative value, the control law is switched into stage 2 where a trajectory shaping method is utilized by changing the coordinates and the trajectory of tracking error is bounded by two pre-designed, exponentially-converging boundaries. After the tracking error converging into a sufficiently small region around zero, the control law is switched to the BLF based method again for constraining the transient trajectory in the third stage. A numerical example is utilized to demonstrate the performance of the proposed three-stage NETTS switching control algorithm.

关键词： trajectory follow error control law computer algorithms switching Control Methods

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An Automatic Parachute Separation System for Aerial Dispersal Miniature Reconnaissance Robot

An Automatic Parachute Separation System for Aerial Dispersa...

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Chinese Control and Decision Conference

作者： Yao Chen Xuanyang Shi Intelligent Robotics Institute Key Laboratory of Biomimetic Robots and Systems Ministry of Education School of Mechatronical Engineering Beijing Institute of Technology

ISBN: (纸本)9781467397155

The kernel of the system is an intelligent control algorithm which can recognize precisely the whole dropping-process from launch module starting up to the miniature robots touching down and then determine whether the robot lands finally. The controller will activate a motor to realize the separation of parachute from the landed robot. This article, based on research into the principle of the system, proposes a control algorithm utilizing a 3-axis digital accelerometer. At last, the related experiments shows that the approach is effectual.

关键词： Intelligent control algorithm Recognize dropping-process Separation of parachute 3-axis digital accelerometer computer algorithms Miniature Robot ANTENNA Seed Dispersal dispersal (organisms) Motor separation AUTOMATIC Intelligent control

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A Vector Control of a Grid-Connected 3L-NPC-VSC with DFIG Drives

A Vector Control of a Grid-Connected 3L-NPC-VSC with DFIG Dr...

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Electronics, computer, Telecommunications and Information Technology International Conference on Electrical Engineering/Electronics, computer, Telecommunications and Information Technology

作者： W. Srirattanawichaikul Y. Kumsuwan S. Premrudeepreechacharn B. Wu Department of Electrical Engineering Faculty of Engineering Chiang Mai University Department of Electrical and Computer Engineering Rajamangala University of Technology Lanna Department of Electrical Engineering Faculty of EngineeringChiang Mai University Department of Electrical and Computer Engineering Ryerson University

ISBN: (纸本)9781424456062

This paper presents a vector control of grid-connected three-level neutral point clamped voltage source converter (3L-NPC-VSC) connecting doubly-fed induction generator (DFIG) drives for variable-speed wind power generation. The control algorithm of the grid-connected 3L-NPC-VSC applies the concepts of the decoupled vector control method, which provides independent control active and reactive power flow and maintain the dc-link voltage constant. The simulation results are shown dynamic and steady-state performance of the grid-connected 3L-NPC-VSC in mode sub-synchronous and super-synchronous speed at low switching frequency that compared with a conventional two-level voltage source converter (2L-VSC). The control strategy is verified by the simulation results with a good sinusoidal current, a low harmonic component and a fast dynamic response.

关键词： Power flow computer algorithms Variable speed voltage source converter Automobile driving Dynamic response Pest Control Vector control DRIVES control strategy Control Methods Simulation results

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Self-Organizing Neural Adaptive Tracking Control of High Speed Trains Subject to Unexpected Traction-Breaking Failures

Self-Organizing Neural Adaptive Tracking Control of High Spe...

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International Joint Conference on Neural Networks

作者： Rui-Zhen Gao Yu-Juan Wang Jun-Feng Lai Yong-duan Song School of Automation Chongqing University

ISBN: (纸本)9781509006212

This paper develops an adaptive control scheme for position and velocity tracking control of high speed trains under uncertain system nonlinearities and actuator failures. Neural networks with self-organizing capabilities are integrated into control design, where the number of the neurons can be adjusted online automatically, so as not only to avoid the problem inherent in the NN with fixed structure but also to deal with system uncertainties containing of nonlinear in-train forces, traction-braking nonlinearities, as well as the unknown actuation faults. As such, the resultant control algorithms are able to achieve high precision train speed and position tracking under varying operation railway conditions, as validated by theoretical analysis and numerical simulations.

关键词： high-speed train nonlinearity system uncertainties Location tracking Adaptive tracking computer algorithms design control adaptive control Theoretical analysis Fixed platforms

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Development of Vision-based Autonomous Robotic Fish and Its Application in Water-polo-attacking Task

Development of Vision-based Autonomous Robotic Fish and Its ...

引用

2008 American Control Conference, Pages 441-879

作者： Wei Zhao Yonghui Hu Guangming Xie Long Wang Yingmin Jia Intelligent Control Laboratory Department of Mechanics and Space Technologies College of Engineering Peking University Beijing 100871 China

ISBN: (纸本)9781424420780

This paper presents the design and locomotion control of a vision-based autonomous robotic fish, and its application in water-polo-attacking task. Most of previous work on task strategies of autonomous robots is focused on the terrestrial robots and seldom deals with underwater applications. In fact, the tasks in underwater environment are more challenging than those in ground circumstances due to the uncertainties and complexity in hydro-environment. In this paper, a water-polo-attacking task is designed and implemented based on artificial potential field. The experimental results are presented to verify the effectiveness of the proposed control algorithms.

关键词： computer algorithms Wet underwater environment Autonomous robots Fishes potential field UNDERWATER APPLICATION

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Model Development for Real Time Optimal Control in Pipe Lines

Model Development for Real Time Optimal Control in Pipe Line...

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American Control Conference

作者： Boyun Wang April Warnock Anna G. Stefanopoulou Nikolaos D. Katopodes Department of Mechanical Engineering University of Michigan Ann Arbor MI 48105 USA Department of Civil and Environmental Engineering University of Michigan Ann Arbor MI 48105 USA

ISBN: (纸本)9781479901777

A model reference optimal control architecture for the real-time fluid control of eliminating a contaminant plume from a pipe system was introduced in an earlier paper [1]. The mathematical model for the contaminant flow, is now extended and parameterized based on computational fluid dynamic simulations of a two-dimensional (2D) channel. It is also shown, based on the computational fluid dynamics (CFD) simulations, that the 2D-based mathematical model can be used for three-dimensional (3D) pipe flow problem under certain constraints. Finally, we also derive a very simple control law of the flow rate in a boundary port that would remove a contaminant if the flow was a theoretical 2D flow. This simple control law can initialize the iterative process of computing the optimal flow based on a more complex model and real-time measurements. With the results in this article, the optimal control architecture can be tested in the real-time prototype experiments. Further improvements on the mathematical model and control algorithm can be made for real life pipe-line fluid control problems.

关键词： real-time mathematical contaminant Real time control law model design Iterative Process Piping systems pipeline Pollutant Optimal control Mathematical Model Flow Control Architecture Flow rates computer algorithms

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