检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： Huanshui Zhang D. Zhang Wei Wang Lihua Xie Shenzhen Graduate School of Harbin Institute of Technoloy Shenzhen China The Center for Information and Control Dalian University of Technology Dalian China Department of Computing Hong Kong Polytechnic University Hong Kong China BLK S2 School of Electrical and Electronic Engineering Nanyang Technological University Singapore

ISBN: (纸本)0780379241

In this paper, a new approach is presented for robust filtering of a linear discrete-time signal by applying fictitious noise. Modeling errors, in both the numerator and denominator of the transfer functions, are parameterized by using random variables with zero mean and known covariance. The robust performance is obtained by minimizing the mean square estimation error over all of the random parameter and noise. To derive a robust estimator, the uncertainties in the model are incorporated into two mutually uncorrelated fictitious noises with zero means. The covariances of the fictitious noises are computed by using two formulas that are presented in this paper. An illustrative example shows the effectiveness of our approach.

关键词： Noise robustness Uncertainty Polynomials Transfer functions Stochastic resonance Technological innovation Mean square error methods Robust control Information filtering Information filters

来源：评论

学校读者我要写书评

暂无评论

Progressive watermarking techniques with genetic algorithms

Progressive watermarking techniques with genetic algorithms

引用

International Carnahan Conference on Security technology

作者： H.-C. Huang J.-S. Pan C.-S. Shieh F.-H. Wang Dept. of Electronics Engineering National Chiao Tung University Hsinchu Taiwan R.O.C. Department of Automatic Test and Control Harbin Institute of Technology Harbin P.R.C. Dept. Electronic Eng. Nat'1 Kaohsiung Univ. of Applied Sciences Kaohsiung Taiwan R.O.C. School of Electrical and Information Eng. University of South Australia Adelaide Australia

An innovative watermarking scheme based on progressive transmission with genetic algorithms (GA) is proposed. We implement the watermarking embedding and extraction system in the discrete cosine transform (DCT) domain, and apply the JPEG spectral selection mode for progressive transmission. By employing GA with a proper fitness function into the watermarking system, both the watermark imperceptibility and watermark robustness requirements are considered and optimized. In addition, the embedded watermark can be partly extracted in the receiver side even when the watermarked image is being transmitted. Simulation results show both the robustness and the effectiveness of progressive transmission under different attacking schemes and different bandwidth variations.

关键词： Watermarking Genetic algorithms Frequency Robustness PSNR Discrete cosine transforms Image restoration Signal resolution Low pass filters Filtering

来源：评论

学校读者我要写书评

暂无评论

Star-sensor-based predictive Kalman filter for satellite attitude estimation

引用

Science in China(Series F) 2002年第3期45卷 189-195页

作者：林玉荣邓正隆 1. Department of Control Science and Engineering Harbin Institute of Technology 150001 Harbin China

A real-time attitude estimation algorithm, namely the predictive Kalman filter, is presented . This algorithm can accurately estimate the three-axis attitude of a satellite using only star sensor measurements. The implementation of the filter includes two steps: first, predicting the torque modeling error, and then estimating the attitude. Simulation results indicate that the predictive Kalman filter provides robust performance in the presence of both significant errors in the assumed model and in the initial conditions.

关键词： model error predictive estimation extended Kalman filter (EKF) attitude estimation.

来源：评论

学校读者我要写书评

暂无评论

Adaptive information sharing factors in federated Kalman filtering 15th

Adaptive information sharing factors in federated Kalman fil...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Zhang, Hongwei Lennox, Barry Goulding, Peter R. Wang, Yufei Control Engineering Research Group School of Engineering University of Manchester ManchesterM13 9PL United Kingdom Control Engineering Department Harbin Institute of Technology Harbin China

ISBN: (纸本)9783902661746

This paper presents an adaptive determination method of the information sharing factors employed in the federated Kalman filtering algorithm. This approach is based on generalised eigenvalue decomposition of the covariance matrix of the estimated errors associated with individual sensors. The paper begins with a discussion of the structural features and information sharing principle of the Federated Kalman filtering approach. Following development of the new method, simulation results demonstrate its capability to provide a considerable improvement in robustness to changing plant conditions, at the cost of a minimal loss in accuracy under ideal plant behaviour. Copyright © 2002 IFAC.

关键词： Information filtering

来源：评论

学校读者我要写书评

暂无评论

Robust H∞ control with Exponent Stability for Time-Delay Uncertain Systems

引用

Journal of Systems engineering and Electronics 2002年第1期13卷 27-33页

作者： Luo Xiaoyuan Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 P. R. China Department of Control Engineering Harbin Institute of Technology Harbin 150001 P. R. China

This paper is concerned with the robust H ∞ control with exponent stability for a class of time delay uncertain systems. Attention is focused on the design of controllers such that the resulting closed loop system not only is exponentially stable but also satisfies, H ∞ disturbance attenuance via memoryless state feedback control. Sufficient conditions for feasibility are obtained in terms of LMIs. Moreover, optimization of LMI is considered such that the controller with low gain parameters is formulated.

关键词： Uncertain system Time delay Robust H ∞ control Exponent attenuance LMI.

来源：评论

学校读者我要写书评

暂无评论

A novel control algorithm based on immune feedback principle

A novel control algorithm based on immune feedback principle

引用

International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Zhen-Qiang Qi Guang-Da Hu Zhao-Hua Yang Fu-En Zhang Department of Control Science and Engineering Harbin Institute of Technology Harbin China Department of Automatic Measurement and Control Harbin Institute of Technology Harbin China

Based on the feedback principle of a nature immune system, the immune process is imitated from the viewpoint of molecular dynamics and a nonlinear immune system model is developed. Furthermore, a novel control algorithm based on the immune feedback principle is designed. According to the result of simulation, the algorithm can respond rapidly and stabilize quickly, just like the nature immune system does. It is shown that the performance of the immune feedback controller is superior to that of an ordinary controller.

关键词： Feedback Immune system Automatic control Neural networks Nonlinear control systems Nonlinear dynamical systems Algorithm design and analysis Adaptive control Information systems Electronic mail

来源：评论

学校读者我要写书评

暂无评论

Neural networks in friction compensation, velocity & acceleration measurement and PID design

Neural networks in friction compensation, velocity & acceler...

引用

IEEE International Conference on Industrial technology, IEEE ICIT 2002

作者： Qiang, Sheng Gao, X.Z. Zhuang, Xianyi Department of Control Science and Engineering Harbin Institute of Technology P. O. Box 329 Harbin150001 China Institute of Intelligent Power Electronics Helsinki University of Technology Otakaari 5 A EspooFIN-02150 Finland

ISBN: (纸本)0780376579

It is well known that in motor systems, friction is the main factor that degrades the overall servo performance. PID controllers based on the velocity and acceleration signals feedback can be used to reduce the tracking error, improve the robustness for modeling errors, as well as combat with the harmful friction. In this paper, we give an overview on the applications of neural networks in external friction compensation, the velocity and acceleration measurement, and PID parameter design & tuning in the servo motor systems. © 2002 IEEE.

关键词： Three term control systems

来源：评论

学校读者我要写书评

暂无评论

PLC-based control systems for industrial production of fuel alcohol

PLC-based control systems for industrial production of fuel ...

引用

IEEE International Conference on Industrial technology, IEEE ICIT 2002

ISBN: (纸本)0780376579

In this paper, we discuss the application of Programmable Logic controllers (PLCs) in the process monitoring and control for fuel alcohol production. The PLCs are mainly utilized for collecting process data as well as realizing auto-tuning PID and sequence control strategies. In addition, WinCC configuration software with a Human-Machine Interface (HMI) is used to monitor the dynamical industrial process. Both software- and hardware-based implementations of our system are also described in details. © 2002 IEEE.

关键词： Process control

来源：评论

学校读者我要写书评

暂无评论

Study on pattern recognition of the quality control chart based on neural network

Study on pattern recognition of the quality control chart ba...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Ping Chen Junqin Liu Jing Luo Department of electric engineering Harbin Institute of Technology Harbin China Department of Control Engineering Harbin Institute of Technology Harbin China

The quality control chart is the main tool of quality control in a FMS. The pattern recognition of the quality control chart using a neural network is presented. Thus the pattern recognition of the quality control chart can be implemented automatically. The configuration of the neural network is simple, the capability of recognition is more powerful and training time is less than for existing methods. Six basic patterns can be quickly identified by this approach. The mixed pattern with two basic patterns can also be recognized. Simulation results are given in the paper.

关键词： Pattern recognition Quality control Neural networks Flexible manufacturing systems control engineering Manufacturing automation

来源：评论

学校读者我要写书评

暂无评论

Modeling and real time control of Internet-distributed control system

Modeling and real time control of Internet-distributed contr...

引用

Annual Conference of Industrial Electronics Society

作者： Teng Fei Wang Chang Hong Department of Control Science & Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)0780374746

Internet-based control system (IBCS) is being widely researched for its novel function of allowing any user to teleoperate any Internet-connected device via Internet. But the realization on the system's topology is too superficial to discover its characters and advantages. Moreover, even some successful applications have shown it is possible to use the Internet for the real time remote control, research on the feasibility are so scarce that there is not a scale for the sense of the designs of real-time control over Internet. And the problem of real-time control caused by variable unpredictable time delay and package loss of Internet is still a primary hamper in the progress of IBCS, mainly because the model of the IBCS is not studied adequately. In this paper we firstly bring forward the concept of the Internet-distributed control system (IDCS) and its topology while two useful characters, self-organization and robustness, are introduced. The IDCS combining the Internet as a part of the control system is the general model of the IBCS. Then through a mathematical model of the IDCS, we show it is a nonlinear time-variable system with random character. Furthermore we prove that in an IDCS the requirement of real-time control with a sampling interval can not be satisfied completely and the feasibility of the requirement equals the real-time-ability of the control loop. According to this theory and considering the heterogeneous character of the IDCS, we propose a cooperative stream control scheme for multiple control streams called control streams manager (CSM), which is located at each component of IDCS and provides a cooperative stream control among multiple control streams.

关键词： Real time systems Internet control system synthesis control systems Topology Delay effects Packaging Robust control Mathematical model Sampling methods

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：