• Title/Summary/Keyword: System Property

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The Properties of Uniform Probabilistic Relaxation System

  • Lim, Gi Y.;M.N. Fu, Alan;Hong, Yan
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 1998.06a
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    • pp.413-416
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    • 1998
  • In this paper we first show that uniform PR systems and half independent PR systems have same dynamics, and then an important property of this two kinds of systems is derived. The most important property of uniform PR systems is that they have the ability of classifying m-dimensional problabilistic vector into in classes. The significance of studying the dynamics of uniform PR systems are tried from the beginning with a uniform PR system.

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UNIFORMLY LIPSCHITZ STABILITY AND ASYMPTOTIC PROPERTY OF PERTURBED FUNCTIONAL DIFFERENTIAL SYSTEMS

  • Im, Dong Man;Goo, Yoon Hoe
    • Korean Journal of Mathematics
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    • v.24 no.1
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    • pp.1-13
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    • 2016
  • This paper shows that the solutions to the perturbed functional dierential system $$y^{\prime}=f(t,y)+{\int_{t_0}^{t}}g(s,y(s),Ty(s))ds$$ have uniformly Lipschitz stability and asymptotic property. To sRhow these properties, we impose conditions on the perturbed part ${\int_{t_0}^{t}}g(s,y(s),Ty(s))ds$ and the fundamental matrix of the unperturbed system $y^{\prime}=f(t,y)$.

Uncertainty Modeling and Robust Control for LCL Resonant Inductive Power Transfer System

  • Dai, Xin;Zou, Yang;Sun, Yue
    • Journal of Power Electronics
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    • v.13 no.5
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    • pp.814-828
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    • 2013
  • The LCL resonant inductive power transfer (IPT) system is increasingly used because of its harmonic filtering capabilities, high efficiency at light load, and unity power factor feature. However, the modeling and controller design of this system become extremely difficult because of parameter uncertainty, high-order property, and switching nonlinear property. This paper proposes a frequency and load uncertainty modeling method for the LCL resonant IPT system. By using the linear fractional transformation method, we detach the uncertain part from the system model. A robust control structure with weighting functions is introduced, and a control method using structured singular values is used to enhance the system performance of perturbation rejection and reference tracking. Analysis of the controller performance is provided. The simulation and experimental results verify the robust control method and analysis results. The control method not only guarantees system stability but also improves performance under perturbation.

A Study on the System Design for Measuring the Property of Broadband AC Magnetic Sensors (광대역 교류 자기센서 특성 시험장치 설계에 관한 연구)

  • Chung, Hyun-Ju;Yang, Chang-Seob;Jung, Woo-Jin
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.685-686
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    • 2015
  • This paper describes design results of the measurement system to test the properties of broadband AC magnetic field sensors used in weapon system. This measurement system consists of 3-axis helmholtz coil, signal generator, signal amplifier, sensor data acquisition unit and measurement & analysis controller including the operating software. This system is able to measure various properties of AC magnetic field sensor such as sensitivity, linearity and dynamic response in the frequency of 1 Hz to 10 kHz. The performance of this system was verified by measuring and analyzing the property of a MAG 639, standard magnetic field sensor of bartington instruments, with this developed system.

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A Development of the Measuring System for Grounding Properties in Liveline (활선상태 접지특성 측정시스템 개발)

  • Choi, Nam-Ho;Moon, Young-Pyo;Jung, Jae-Gi;Park, Kang-Sik;Han, Sang-Ok
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.05c
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    • pp.36-40
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    • 2002
  • This paper presents the results of a investigation, a development of the measuring system for grounding properties in live-line. The importance of the grounding system and it's property has been increased with the development, enlarge in capacity, of electrical industry. Moreover, with the rapid growth of communication and precision industry, now, we should consider the grounding properties to ensure the stable and/or safe operation. But the conventional measuring system is not proper to measure the grounding properties of the system, voltage applied. So, in this investigation, we proposed a new method for live-line measurement and develope the system. And through the field test we could confirm the superior performance of th developed system.

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Development of Control System of Twin-Fluid Nozzles for Controlling Spraying Rate and Droplet Size (이류체노즐을 이용한 분무량과 분무입경 제어시스템 개발)

  • 이중용;안형철;정창주
    • Journal of Biosystems Engineering
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    • v.25 no.1
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    • pp.11-18
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    • 2000
  • In precision chemical application increment of biological efficacy with less chemical is the virtue. spraying rate and droplet size is closely related to biological efficacy. this study was performed to develope a spray-control-system that could control spraying rate and droplet size independently. Twin-fluid nozzles were selected and tested to certify if the nozzles were suitable for the objective of this study. Characteritics of the nozzles i.e., spraying rte and droplet size change u8nder the changes of spraying pressure and air pressure were statistically modeled. The model had I to 1 matching property between dependent variables and independent variables. Using the property and the model, inverse relationship could be determined between variables. A feedback spray control system was developed and tested with predetermined error of 5 % in pressure. The system showed 4 % error in spraying rate and 9 % error in droplets size. Performance of the system could be upgraded by fine tuning but, in practical sense keeping air pressure in the field sprayer was the bottle neck of commercialization of the spray system.

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Composition and Automation of Electrical Property Measurement System for Thin Films (박막의 전기적 특성평가를 위한 측정 시스템의 구성 및 자동화)

  • 구경완;황문수;천희곤
    • Journal of the Korean Vacuum Society
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    • v.1 no.3
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    • pp.371-375
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    • 1992
  • Low cost, PC controlled electrical property measurement systems were constructed to study thin film characteristics such as ; I-V, C-V, C-t, and low current. In addition, a GPIB card and C language program for data control and analysis were made for this study.

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Head Pose Estimation by using Morphological Property of Disparity Map

  • Jun, Se-Woong;Park, Sung-Kee;Lee, Moon-Key
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.735-739
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    • 2005
  • This paper presents a new system to estimate the head pose of human in interactive indoor environment that has dynamic illumination change and large working space. The main idea of this system is to suggest a new morphological feature for estimating head angle from stereo disparity map. When a disparity map is obtained from stereo camera, the matching confidence value can be derived by measurements of correlation of the stereo images. Applying a threshold to the confidence value, we also obtain the specific morphology of the disparity map. Therefore, we can obtain the morphological shape of disparity map. Through the analysis of this morphological property, the head pose can be estimated. It is simple and fast algorithm in comparison with other algorithm which apply facial template, 2D, 3D models and optical flow method. Our system can automatically segment and estimate head pose in a wide range of head motion without manual initialization like other optical flow system. As the result of experiments, we obtained the reliable head orientation data under the real-time performance.

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