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IIH-MSP 2009 - 2009 5th International Conference on Intelligent Information Hiding and Multimedia Signal Processing

作者： Hao, Jiasheng Shen, Yi Xu, Hongbing Zou, Jianxiao School of Automation Engineering University of Electronic Science and Technology of China ChengDu 610054 China Dept. of Control Science and Engineering Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9780769537627

Computer aided fusion of multi modality medical images provides a very promising diagnostic tool with numerous clinical applications. The objective of this paper is to present a novel scheme of medical imaging fusion. We define "local to be fused" of the process of image fusion as a generalized local, which extends airspace locals to generalized locals, and promotes the airspace local priority to generalized local priority. Based on this priority, the volume-weighted of token coefficient of images is introduced and weighted so that multi-modal medical image fusion is achieved with high quality. This scheme is applied to CT/MRI datasets and results show the effectiveness of the method. © 2009 IEEE.

关键词： Image fusion

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Power losses for IGCTs and diodes in MV three-level inverters

Power losses for IGCTs and diodes in MV three-level inverter...

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Sixth International Conference on Power Electronics and Drive Systems, PEDS 200

作者： Yuan, Liqiang Zhao, Zhengming Yang, Zhi Dept. of Electrical Engineering Tsinghua Univ. State Key Lab of Control and Simulation of Power System Beijing China Dept. of Frequency-converter and Control System GuoDian NanJing Automation Co. Ltd. Nanjing China

ISBN: (纸本)0780392965

The power-loss models for different switching states of IGCTs and diodes in MV (medium voltage) three-level NPC (neutral point clamped) inverters are presented in this paper. The models, simulation implementation and the revisional experiments on IGCT test platform are described in details. The relation between the power losses and the other elements of the inverter is analyzed and discussed. © 2005 IEEE.

关键词： Electric inverters

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Ontological Analysis of the Digital Crime Conceptual Model 18

Ontological Analysis of the Digital Crime Conceptual Model

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18th IEEE International Conference on Computer Science and Information Technologies, CSIT 2023

作者： Vlasenko, Lidiia Lutska, Nataliia Zaiets, Nataliia Lysenko, Vitaliy State University of Trade and Economics dept. of Software Engineering and Cyber Security Kyiv Ukraine National University of Food Technologies dept. of Automation and Computer Technologies of Control Systems Kyiv Ukraine National University of Life and Environmental Sciences of Ukraine dept. of Automation and Robotic Systems Kyiv Ukraine

ISBN: (纸本)9798350360462

A conceptual ontological model of Digital Crime has been developed, consisting of five non-empty classes. Identification and classification were carried out according to the experience of domestic and foreign experts. The central place of the model is occupied by objects of the Digital Crime class, which have their own attributes and are connected by various links with other objects. Objects of some classes are filled in by users, others are formed by knowledge engineers. Based on the ontological analysis, SWRL-rules are constructed that automatically form links between objects of the custom classes Digital crime and Digital evidence with objects of the Type of crime and Criminal Liability classes. The last class contains articles of the Criminal Code of Ukraine on criminal liability for digital crimes. The ontological model is developed taking into account possible requests to it. Such queries can be formed on the basis of direct relationships between human and automatic concepts. And also contain logical chains to concepts that do not contain an explicit link in the ontology. It is assumed that the model can be expanded and supplemented. The ontological model of Digital Crime can be used to share information, develop new systems and applications, improve information retrieval and ensure its accordance. © 2023 IEEE.

关键词： Ontology

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Review of infrared target simulator calibration system and its applications

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2007年第SUPP. 4期28卷 96-99+117页

作者： Dai, Jingmin Xiao, Peng Dept. of Automation Measurement and Control Engineering Harbin Institute of Technology Harbin 150001 China

Spectral irradiance is an important parameter in the fields of aerospace, aviation, national defense and military. Its advance in emissivity measurement has been reviewed during recent years. The apparatus for measuring infrared target simulator was constructed in author's lab by using standard IR Spectro radiometer. Moreover, some applications of measurement technique were reviewed. In the end, the conclusion was made. There is extensive application in the infrared technology of infrared goal simulator. For ensuring the accuracy and availability of transmitting value on measuring infrared radiation, it is necessary to measure and verify the output of the radiation illumination of infrared goal simulator. The principle of method and each part of the measuring device are described, and the method of signal processing is analyzed in this paper.

关键词： Calibration Infrared radiometer Infrared target simulator Irradiance

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Identification and self-tuning control of electro-pneumatic actuator system with control valve

Identification and self-tuning control of electro-pneumatic ...

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2013 IEEE 3rd International Conference on System engineering and Technology, ICSET 2013

作者： Sunar, N.H. Rahmat, M.F. Faudzi, Ahmad'Athif Mohd Ismail, Z.H. Salim, Sy Najib Sy Dept. of Mechatronics and Control Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Malaysia Center for Artificial Intelligence and Robotic Universiti Teknologi Malaysia Jalan Semarak Kuala Lumpur Malaysia Dept. of Control Instrument and Automation Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Malaysia

ISBN: (纸本)9781479910304

In this paper, a mathematical modeling of pneumatic actuator system is developed by using RLS algorithm. An ARX model is chosen for the model structure. In order to cater the time-varying parameter of pneumatic system, a self-tuning controller is implemented based on the pole-assignment controller. An online RLS algorithm update the parameter estimation at every sample interval. The pole-assignment control parameter is then updated accordingly to the changes of the system parameters. Result of the system performance is compared with the conventional PID controller optimized by PSO algorithm. It is observed that the self-tuning controller performed well with almost zero error at steady state condition and overshoot less than 1%. © 2013 IEEE.

关键词： Pneumatics

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Cooperative interception via staggering and information sharing 56

Cooperative interception via staggering and information shar...

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56th Israel Annual Conference on Aerospace Sciences, IACAS 2016

作者： Shaferman, Vitaly Oshman, Yaakov Institute of Automation and Control Vienna University of Technology Vienna1040 Austria Dept. of Aerospace Engineering Technion - Israel Institute of Technology Haifa32000 Israel

A novel cooperative tracking and interception strategy, which exploits information sharing and missile staggering, is presented. The key idea underlying the approach is to exploit the superior information collected by the leading missile to improve the interception performance of the trailing missiles. For tracking a maneuvering target, the paper derives a nonlinear adaptation of an interacting multiple model filter in cooperative and non-cooperative estimation modes. The optimal staggering between the missiles is derived based on a linear model and a deterministic approximation of the stochastic estimation process. An extensive Monte Carlo study, in a nonlinear two-dimensional simulation of a ballistic missile defense scenario, is used to demonstrate the viability of the proposed strategy. It is shown that, for a two-on-one interception engagement, the trailing missile's estimation performance, in the information-sharing mode, substantially improves, when compared to that of non-cooperating missiles. Combining this estimation improvement with guidance laws that utilize target acceleration yields a dramatic improvement in the team's closed loop interception performance. © 2016, Israel Annual Conference on Aerospace Sciences. All rights reserved.

关键词： Stochastic systems

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Robust H∞ control design for stiffness measurement of flexible joint

Robust H∞ control design for stiffness measurement of flexi...

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International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Wang, Guang-Lin Li, Yun-Feng Wu, Yun-Li Dept. of Mechanical Engineering and Automation Harbin Institute of Technology Harbin 150001 Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin 150001

ISBN: (纸本)078039092X

Flexible joint, one kind of force-sensing element, is a key part of flexible gyro. Its stiffness is very small such that it is easily disturbed by noises in working environment. During the development of the instrument of its stiffness measuring, instability is the main factor affecting the measuring precision. This paper firstly presents a model for stiffness measuring system subjected to disturbance. Based on the model, robust H∞ control design for stiffness measurement of flexible joint is proposed by using a complete parametric approach of eigenstructure assignment to stabilize the stiffness measuring system and guarantee the specified H∞-norm upper-bound constraint. Finally, the results of simulation show the effect of the proposed approach. © 2005 IEEE.

关键词： Systems analysis

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A cooperative differential game for imposing a relative intercept angle

A cooperative differential game for imposing a relative inte...

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AIAA Guidance, Navigation, and control Conference, 2017

作者： Shaferman, Vitaly Shima, Tal Institute of Automation and Control Vienna University of Technology Vienna1040 Austria Dept. of Aerospace Engineering Technion—Israel Institute of Technology Haifa32000 Israel

ISBN: (数字)9781624104503

ISBN: (纸本)9781624104503

A cooperative guidance law for a team of interceptors trying to intercept, from multiple directions, an evading target is proposed. An example scenario of interest is that of intercepting an aerial target, such as a ballistic missile, from multiple directions. The engagement is analyzed in the framework of a linear quadratic zero-sum two-person differential game, where the team of interceptors constitutes one of the adversaries and the target the other. Arbitrary number of interceptors, each having linear dynamics, is considered. The obtained guidance law for the team of interceptors enables enforcing a relative geometry in-between the group of missiles and the target. Such an approach is superior, in the sense of the required control effort, to that where each interceptor independently enforces, using a one-on-one strategy, a preselected intercept angle that satisfies the relative intercept requirement. A nonlinear two dimensional simulation is used to investigate the performance of the obtained cooperative guidance law. It is shown that the proposed guidance law is superior to the optimal control based cooperative guidance law when the target is unpredictable and that the interceptors’ acceleration requirements are comparable to conventional guidance laws, that do not impose an angular constraint at interception. © 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Ballistic missiles

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Fault tolerant feedback control using the Youla parameterization 6

Fault tolerant feedback control using the Youla parameteriza...

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6th European control Conference, ECC 2001

作者： Stoustrup, Jakob Nieman, Henrik Dept. of Control Engineering Aalborg University AalborgDK-9220 Denmark Orsted DTU Automation Technical University of Denmark LyngbyDK-2800 Denmark

ISBN: (纸本)9783952417362

An architecture for fault tolerant feedback controllers based on the Youla parameterization is suggested. It is shown that the Youla parameterization will give a residual vector directly in connection with the fault diagnosis part of the fault tolerant feedback controller. It turns out that there is a separation between the feedback controller and the fault tolerant part. The closed loop feedback properties are handled by the nominal feedback controller and the fault tolerant part is handled by the design of the Youla parameter. The design of the fault tolerant part will not affect the design of the nominal feedback controller. © 2001 EUCA.

关键词： Failure analysis

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Detection of parametric faults 15th

Detection of parametric faults

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

作者： Niemann, Henrik Stoustrup, Jakob Ørsted-DTU Automation Technical University of Denmark LyngbyDK-2800 Denmark Dept. of Control Engineering Aalborg University AalborgDK-9220 Denmark

ISBN: (纸本)9783902661746

Fault detection and fault isolation for systems including parametric faults is considered in this paper. By using a linear fractional transformation (LFT) description of parametric fault systems, the systems are transformed into equivalent systems including additive fault signals instead. The theory for systems including additive faults is extended to handle the parametric fault case in the same setting. A number of fundamental problems for parametric fault detection in linear systems is formulated and the corresponding solvability conditions are given. Copyright © 2002 IFAC.

关键词： Fault detection

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