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检索条件"机构=Tianjin Key Laboratory for Control Theory& Applications in Complicated System"

共 820 条记录，以下是271-280 订阅

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Research on Location Method of Pipe Climbing Robot based on Gyroscope

Research on Location Method of Pipe Climbing Robot based on ...

引用

IEEE International Conference on Mechatronics and Automation

作者： Lei Shao Shuai Yang Hongli Liu Ji Li Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

This paper introduced a location method of pipe climbing robot, this robot working in a big pipe that used to desalinate sea water. Traditional method on flaw detection of big sea desalination pipe is by human, This paper provide a new idea on location of the flaw detection robot. Using the fuse of multiple sensor information, the position and posture of climbing robot can be obtained. Gyroscope and the motor encoder can provide sufficient message to locate the robot. Also, with the moving of robot, some errors caused by slide of the robot track and the reading of sensors will happen. These errors can be eliminated by kalman filter. The practicable of this method has been proved by simulation of motion trajectory. Errors could also happened with the improper arrangement of pipeline, but this method is to calculate the subtraction of the sensor reading on two state. So we do not need to consider these errors, it doesn't affect the outcome at any arrangement of pipeline.

关键词： Gyroscopes Kalman filters Robot sensing systems Covariance matrices Climbing robots Pipelines

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Co-design of Model-Reference Scheduling and control

Co-design of Model-Reference Scheduling and Control

引用

第37届中国控制会议

作者： Shunli Zhao Yuehui Ji Tianjin Key Laboratory for Control Theory & Applications in Complicated System Tianjin University of Technology School of Electrical and Electronic Engineering Tianjin University of Technology

There have been growing concerns in networked control system with communication *** the paper,a model-reference scheduling scheme is proposed for optimizing the distribution of the network *** states are determined to gain the access to the network by computing the difference between the real system and the ideal *** stability analysis and the joint design of the controller and scheduling are given by formulating the problem as a linear equality equation that can be solved *** proposed strategy is evaluated through a simple simulation.

关键词： Networked control system model-reference co-design scheduling

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A Method for Locating Reading Area of Digital Instrument Based on Color Characteristics

A Method for Locating Reading Area of Digital Instrument Bas...

引用

IEEE International Conference on Mechatronics and Automation

作者： Tao Wang Lei Shao Xiaoqi Chen Hongli Liu Zhenhai Tan Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

The goal of this work is to solve the positioning problems of the digital meter reading area under complicated background. This paper starts with the basic principles and methods of digital image processing, uses a special grayscale empirical algorithm to locate the LCD screen by analyzing the color characteristics of the LCD screen. Experiments on the actual pictures show that the proposed algorithm has good adaptability to most kinds of digital instruments with complicated dial information and effectively solves the positioning problems of the LCD screen, and positioning accuracy.

关键词： Liquid crystal displays Image color analysis Instruments Gray-scale Meter reading Image edge detection Brightness

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Design of the Speech control system for a Upper Limb Rehabilitation Robot Based on Wavelet De-noising

Design of the Speech Control System for a Upper Limb Rehabil...

引用

IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Zhi Wang Jian Guo Qiang Fu Nan Li Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

In order to help stroke patients to go on rehabilitation training, a new type of exoskeleton upper limb rehabilitation robot based on biomechanics has been designed in this paper, and speech control has been implemented. The speech control is suitable for patients who can speak. Doctors or family members can also assist patients in training. The system can help patients with hemiplegia to recover the upper limbs and fingers movement function, at the same time, it has the characteristics of small size, more portable and convenient operation. It can also effectively solve the shortage of traditional doctors and patients' one to one rehabilitation training. It is convenient for patients to use in the family. Anybody can help patients with rehabilitation training and has a broad application prospect in the field of rehabilitation. Finally, the speech control system was tested and the master-slave control experiment was implemented. In order to better perform speech recognition and further reduce the noise in the environment, the original speech signals have been de-noised with wavelet transform. The experimental results showed that the success rate of post-noise speech control system rehabilitation training is higher, and the average correct recognition rate of speech control is 94%, thus the feasibility of the speech control system is verified.

关键词： Exoskeleton Upper Limb Robot Wavelet denoising Speech control system Rehabilitation Training

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An Overview on Harmonic Suppression

An Overview on Harmonic Suppression

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第30届中国控制与决策会议

作者： Youjie Ma Faping Hong Xuesong Zhou Zhiqiang Gao Key Research Laboratory for Control Theory ＆ Applications in Complicated Systems Tianjin University of Technology

due to the use of a large number of power electronic equipment in the power system and the increase of nonlinear load, harmonic power quality problems become more and more complex. As one of the most important contents in the research of power quality, the harmonic of power system attracts more and more attention. This paper expounds the main reasons and the harms of harmonic, and analyses some methods of harmonic detection and suppression. Hybrid active power filter is an important way to control harmonic and improve power quality, According to the current research of harmonic suppression at home and abroad, the main development trend of harmonic suppression is analysis.

关键词： power system harmonics harmonic detection harmonic suppression hybrid active power filter

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Research Review on the Energy-saving Technologies for Asynchronous Motors

Research Review on the Energy-saving Technologies for Asynch...

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IEEE International Conference on Mechatronics and Automation

作者： Xuesong Zhou Bao Yang Youjie Ma Zhiqiang Gao Key Research Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

The study of energy saving of motor is hot issues in shortage of energy today. Most researchers have done a lot of works to study the energy saving of motor. Asynchronous motor in daily life, especially in the industrial production plays a very important role. Asynchronous motor is the main energy consumer. In practice, due to various reasons, the asynchronous motor run frequently under the condition of no load or light load, the condition of motor power factor and the efficiency is low, even the large electric energy waste and the loss of money. If the energy saving of asynchronous motor is in control and the efficiency of the motor is improved, the considerable electricity quantity for increasingly energy conservation will have extremely great significance for our society, nowadays. From the perspective of energy-saving of asynchronous motor, this paper introduces the new situation of the asynchronous motor energy-saving`s introduction, significance and research status at home and abroad. This paper mainly discussed the key technology of asynchronous motor energy-saving and its existing problems and briefly introduced its future development trend.

关键词： Induction motors Reactive power Stators Synchronous motors Voltage control Energy conservation

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Vascular environment modeling and verification for the virtual vessel interventional surgery training system 15

Vascular environment modeling and verification for the virtu...

引用

15th IEEE International Conference on Mechatronics and Automation, ICMA 2018

作者： Guo, Shuxiang Zhan, Qi Guo, Jian Meng, Cheng Jin, Xiaoliang Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Binshui Xidao Tianjin391 China Intelligent Mechanical Systems Engineering Department Kagawa University 2217-20 Hayashi-cho Takamatsu761-0396 Japan

ISBN: (纸本)9781538660720

At present, cerebrovascular disease has become the number one killer of endangering human health, and minimally invasive interventional surgery is its main treatment method. However, the vascular intervention surgery places high demands on doctors' surgical procedures, and the actual model and training cost are relatively high. Therefore, the research of vascular interventional surgeon training system based on virtual reality technology becomes more and more important. The quality of a training system depends on whether it can provide a training environment that is close to reality. Based on the study of the training system of vascular interventional surgeons before the laboratory, the concept of blood flow resistance and viscous resistance was increased to improve the authenticity of training system. In this paper, the original vascular model was cut into discrete cylindrical containers, and then the Poiseuille's law and Stokes's law were used to calculate the blood flow resistance and viscous resistance in each container. The blood flow resistance module and the viscous drag module were added to the previous model to simulate blood flow resistance and viscous resistance in a virtual environment. This study helps trained doctors to provide a more realistic training environment. Finally, the relevant verification experiment was carried out in this paper, which proved that the training system with added blood flow resistance and viscous resistance was closer to the real environment. © 2018 IEEE.

关键词： Virtual reality

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Research Review on Big Data of the Smart Grid

Research Review on Big Data of the Smart Grid

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IEEE International Conference on Mechatronics and Automation

作者： Xuesong Zhou Kang Li Youjie Ma Zhiqiang Gao Key Research Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

Application of big data techniques in power system will contribute to the sustainable development of power industry companies and the establishment of strong smart grid. This paper presents a review on smart grids and big data. In order to achieve this, available articles in the literature were reviewed in perception with the features of big data and smart grids. Potential issues for smart grids and big data analytics were discussed. The recent solutions and challenges in smart grids and big data analytics were presented. The technologies used for smart big data analytics were evaluated. The contribution of this article was then presented. The results have been shown that "data" is now a new feature to be added as a main component of power systems.

关键词： Big data analytics Smart grid Review

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Energy Saving Technology Based on Variable Frequency Speed Regulation

Energy Saving Technology Based on Variable Frequency Speed R...

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IEEE International Conference on Mechatronics and Automation

作者： Youjie Ma Qiang Li Xuesong Zhou Zhiqiang Gao Key Research Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China

With the emergence of the energy crisis, more and more attention has been focused on energy saving. The energy saving technology of motor has also been widely concerned, because it is the main energy consumer. As the most potential energy saving technology, the variable frequency speed regulation has a good prospect of energy saving. It is of great significance to study the variable frequency speed control technology. This paper analyses the loss of asynchronous motor, and mainly discussed the key technology and existing problems of the variable frequency speed regulation.

关键词： Induction motors Iron Reactive power Frequency control Stators Hysteresis motors

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Influences of Electric Vehicles on Power system

Influences of Electric Vehicles on Power System

引用

第37届中国控制会议

作者： Youjie Ma Long Tao Xuesong Zhou Zhiqiang Gao Key Research Laboratory for Control Theory ＆ Applications in Complicated Systems Tianjin University of Technology

The electric vehicle has brought fluctuation to the power system. The wide use of electric vehicles（EVs） has exacerbated this challenge. Firstly, the mathematical model of electric vehicles under random charging mode is given. Secondly,the power electronics charger topology is introduced. This paper analyzed the changes of the power system reliability when the proportion of electric vehicles increased, which shows the increase of electric vehicles under random charging mode poses a great threat to the reliability.

关键词： Electric Vehicles Power system Changes

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