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检索条件"机构=Tianjin Key Laboratory of Complex System Control Theory and Applications"

共 186 条记录，以下是141-150 订阅

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Quantized H[infinity] Static Output control for Linear systems with Interval-Bounded Additive controller Coefficient Variations

Quantized H[infinity] Static Output Control for Linear Syste...

引用

International Conference on Artificial Intelligence, Modelling and Simulation (AIMS)

作者： Xianggui Guo Jianliang Wang Fang Liao Tianjin Key Laboratory for Control Theory & Applications in Complicated System Tianjin University of Technology Tianjin China School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore Temasek Laboratories National University of Singapore Singapore Singapore

ISBN: (纸本)9781467386760

This paper investigates insensitive H ∞ control problems for linear continuous-time systems with input and measurement quantization via static output feedback (SOF). The designed controllers are insensitive to additive interval-bounded controller coefficient variations and are made up of two parts as linear and nonlinear parts. The former is used to achieve the H ∞ performance against external disturbances, unknown initial states and controller coefficient variations. The latter is used to attenuate the effect of input and measurement quantization simultaneously. It should be mentioned that three novel linear matrix inequality (LMI) conditions by using three different methods without introducing a matrix equality constraint as many existing results are obtained. Finally, a numerical example is presented to show the effectiveness and advantages of the proposed methods.

关键词： Quantization (signal) Symmetric matrices control systems Uncertainty Linear matrix inequalities Additives Artificial intelligence

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Robust adaptive fault tolerant control for a steering subsystem of unmanned underwater vehicles

Robust adaptive fault tolerant control for a steering subsys...

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第三十四届中国控制会议

作者： Li-Ying Hao Hui Li Xiang-Gui Guo Lijie Cao Qihua Wang the College of Information Engineering Dalian Ocean University Information Science and Technology College Dalian Maritime University Tianjin Key Laboratory for Control Theory & Applications in Complicated System School of Electrical EngineeringTianjin University of Technology

ISBN: (纸本)9781467374439

This paper deals with the robust adaptive fault-tolerant compensation control problem for steering subsystem of unmanned underwater vehicles(UUVs) with actuator time-varying faults, disturbances and parameter uncertainties. A sufficient condition for the existence of reduced-order sliding mode dynamics is derived in the case of actuator faults, and an explicit parametrization of the desired sliding surface is also given. Without the need for a fault detection and isolation(FDI) mechanism, an adaptive sliding mode controller is developed based on the online estimation of an eventual fault to maintain the sliding mode, where the gain of the nonlinear unit vector term is updated automatically to compensate the effects of actuator faults and exogenous disturbances. The simulation demonstrates the effectiveness of the proposed design method.

关键词： Unmanned underwater vehicles(UUVs),fault-tolerant control(FTC),sliding mode control(SMC),actuator time-varying faults

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The predication of the adhesion rate based on NARX model

The predication of the adhesion rate based on NARX model

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2014 International Conference on Manufacturing Technology and Electronics applications, ICMTEA 2014

作者： Zhao, Yang Li, Jun Fang Gao, Qiang Tianjin key laboratory for Control Theory and Applications in Complicated System Tianjin University of technology Tianjin China

ISBN: (纸本)9783038353287

The scaling and corrosion of circulating cooling water have been a major concern in industry circulating cooling water system, severely affecting the production operation of the circulating cooling water system. In this paper, the circulating cooling water quality is investigated and analyzed. In addition, based on the water quality analysis of Petrochemical Industries Co, it is indicated that part of water quality parameters have great influence on the adhesion rate. In order to further forecast the adhesion rate, a NARX neural network prediction model is developed. Finally, the actual data sets are utilized to demonstrate the feasibility of proposed model. © (2014) Trans Tech Publications, Switzerland.

关键词： Water quality

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Non-fragile H∞ consensus of linear multi-agent systems with interval-bounded variations

Non-fragile H∞ consensus of linear multi-agent systems with...

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Mediterranean Conference on control and Automation (MED)

作者： Xiang-Gui Guo Jian-Liang Wang Fang Liao Tianjin Key Laboratory for Control Theory & Applications in Complicated System Nanyang Technological University Tianjin Singapore China School of Electrical and Electronic Engineering Nanyang Technological University Singapore Temasek Laboratories National University of Singapore Singapore

ISBN: (纸本)9781479999378

This paper studies the distributed non-fragile H ∞ consensus problems for linear multi-agent systems with external disturbances and unknown initial disturbances under switching weighted balanced directed topologies. The designed controllers are insensitive to multiplicative controller coefficient variations. Sufficient conditions for the existence of the proposed control strategy are also obtained by using linear matrix inequality (LMI) technique. It is worth mentioning that instead of requiring the coupling strength among neighboring agents to be larger than a threshold value as in previous literature, the coupling strength in this paper can be determined by solving some LMIs. Finally, a numerical example is presented to show the effectiveness of the proposed method.

关键词： Multi-agent systems Protocols Switches Topology Uncertainty Couplings

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Research on Image Matching Technology for the Spherical Stereo Vision

Research on Image Matching Technology for the Spherical Ster...

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IEEE International Conference on Mechatronics and Automation

作者： Baofeng Zhang Na Liu Yingkui Jiao Yongchen Li Junchao Zhu Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology 391 Binshui Xidao Xiqing District Tianjin 300384 China Key Laboratory of Computer Vision and System Ministry of Education of China School of Computer and Communication Engineering Tianjin University of Technology 391 Binshui Xidao Xiqing District Tianjin 300384 China

ISBN: (纸本)9781479970995

The technique of stereo matching is an important research goal of spherical stereo vision system, which is widely used in visual navigation, motion analysis and panoramic surveillance areas. Fisheye lens can get view images of large field, this paper uses two fisheye lens whose optical axis are perpendicular to construct spherical stereo vision system and does research in stereo matching of spherical stereo vision system. As the image that fish eye lens collected has lager distortion, this paper does stereo matching with the images the system collected without distortion correction using matching algorithm based on maximally stable extremal regions (MSER) and affine scale invariant feature transform (ASIFT) to reduce the correction error generated in the process. The experiment results show that the algorithm can be applied in stereo matching of fish eye image without distortion, and the results meets the need of 3D reconstruction.

关键词： Matching Spherical stereo vision Maximally Stable Extremal Regions (MSER) Affine Scale Invariant Feature Transform (ASIFT)

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Implementation of the optimized localization algorithm based on RSSI for cow location

Implementation of the optimized localization algorithm based...

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2014 International Conference on Manufacturing Technology and Electronics applications, ICMTEA 2014

作者： Zhao, Hui Wang, Xiao-Tong Wang, Hong-Jun Yue, You-Jun Zhao, Hui Tianjin Key Laboratory for Control Theory and Applications in Complicated System Tianjin University of Technology Tianjin China Tianjin Agricultural University Tianjin China

ISBN: (纸本)9783038353287

The movement reflects the health of dairy cows. In this paper, each cattle installs wireless sensor nodes in their neck to collect information about the position of the cows. In order to avoid the influence of the environment on network nodes ranging accuracy, at the same time improve positioning accuracy, this paper give Ranging optimization and positioning optimization, combines the RSSI ranging with APIT algorithm, and proposes APIT localization algorithm based on RSSI correction for real-time positioning,the simulation shows that compared with traditional method, the improved algorithm has high positioning accuracy, low requirement for the distribution of beacon nodes. © (2014) Trans Tech Publications, Switzerland.

关键词： Sensor nodes

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Robust fault tolerant controller design using indirect adaptive sliding mode control strategy

Robust fault tolerant controller design using indirect adapt...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent systems

作者： Hui Li Li-Ying Hao Xiang-Gui Guo Dalian Maritime University Dalian Liaoning CN Information Science and Technology College Dalian Maritime University Dalian Liaoning China The College of Information Engineering Dalian Ocean University Dalian Liaoning China Tianjin Key Laboratory for Control Theory & Applications in Complicated System Tianjin Univnrsity of Technology Tianjin China

ISBN: (纸本)9781479987313

In this paper, indirect adaptive sliding mode control schemes are developed to solve the robust fault tolerant control (FTC) design problem of actuator fault and perturbation compensations for linear time-invariant systems. While both eventual faults on actuators and perturbations are unknown, the adaptive schemes are addressed to estimate the upper bounds of perturbations online, as well as to estimate control effectiveness on actuators. Thus, on the basis of the information from adaptive schemes, an adaptive sliding mode controller is designed to compensate the effects of faults and perturbations automatically. According to Lyapunov stability theory, it is shown that both the reachability of sliding surfaces and the stability of sliding mode dynamics can be ensured even in the presence of actuator faults and disturbances. Moreover, the adaptive sliding mode control can reduce the phenomenon of chattering. An example is provided to further illustrate the fault compensation effectiveness.

关键词： Actuators Fault tolerance Fault tolerant systems Sliding mode control Upper bound Adaptive systems Uncertainty

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Soft Actuator for Hand Rehabilitation

Soft Actuator for Hand Rehabilitation

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IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Fang Zhao Wei Wei Jian Guo Xin Zhao Weijie Zhang Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology 391 Binshui Xidao Xiqing District Tianjin 300384P.R.China Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology 391 Binshui Xidao Xiqing District Tianjin 300384P.R.China College of Physics Optoelectronics and Energy Soochow University 1 Shizi Street Suzhou 215006 a Jiangsu P. R. China

ISBN: (纸本)9781479970995

As we all know, rigid structure is the universal form of robots. They can be controlled accurately, but are not suitable enough for applying in rehabilitation, especially for hands. Human's hands have some complicated patterns of movement and narrow joint range of motion, so rigid accessory equipment may cause secondary injury. For the purpose of avoiding this potential risk, the idea of applying soft structure to hand rehabilitation robot is presented in this paper. The soft robot is a new research direction in the field of robot industry, especially in rehabilitation. The soft actuator we presented is made of liquid silicone and thread, and can be tied to the back of human's hands. When it is inflated or deflated, a bending and stretching motion of hands follow with the deformation of soft actuators. It works by deforming repeatedly. The soft actuator has some advantages such as portable, lightweight, low-cost, safe, low-impedance and so on. It works well by the cooperation of vacuum pump which can provide incessant air and solenoid valve which is used for reversing. In the whole system, force sensing resistor and bending sensor are used in the experiments. In order to prove that the soft actuator can work smoothly, we had a test to explore the relationship between air inflow and bending angle. The result that their relationship is close to a straight line means controlling easily and working well. Beacons of these advantages the soft robots have, a wide application prospect in rehabilitation or other fields is available.

关键词： Rehabilitation Soft Actuator Portable system

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Research on the vibration characteristics of the explosion vessel using wigner-ville distribution 3rd

Research on the vibration characteristics of the explosion v...

引用

3rd International Conference on Materials Engineering and Automatic control, ICMEAC 2014

作者： Liu, Hong Li Guo, Peng Dong, Guo Ling Liu, Jun Mu, Yi Tianjin Key Laboratory for Control Theory and Applications in Complicated System Tianjin University of Technology Tianjin 300384 China Department of Mechanical Engineering University of Canterbury New Zealand

ISBN: (纸本)9783038351405

The deformation analysis of explosion vessel is very important in strength analysis and engineering design. By means of laser Doppler measurement and Wigner-Ville distribution, the expansion process of steel explosion vessels has been studied, and the frequency characteristics of the strain wave are analyzed. Finally, the experimental results of deformation and vibration frequency of vessel are given under the condition of 300g TNT explosion equivalent. © (2014) Trans Tech Publications, Switzerland.

关键词： Doppler effect

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Identification of fish species based on image processing and statistical analysis research

Identification of fish species based on image processing and...

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IEEE International Conference on Mechatronics and Automation

作者： Lian Li Jinqi Hong Tianjin Key Laboratory for Control Theory & Applications in Complicated System Tianjin University of Technology Tianjin China

For more fish varieties, to the subsequent processing and marketing, which is necessary to classify the types of fish. This study is based on image processing technology to classify the types of fish, four fish to make use of the existing image acquisition device for collecting samples, through the MATLAB software for image preprocessing, such as fish gray, binarization, image enhancement, contour extraction to extract the 11 feature parameters of four fish species, such as using the principal component analysis (PCA) to 11 characteristic parameters for dimension reduction, this study took four principal component. Then use SPSS software to establish fisher and mahalanobis distance model, the combination of four principal component reuse component to build a model to classify the four different kinds of fish. Through SPSS software simulation and identification results show that the average recognition rate of 96.67%, which can be well applied to the fish species identification technology.

关键词： Marine animals Feature extraction Image color analysis Principal component analysis Object recognition Software

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