• Title, Summary, Keyword: linear system

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Descriptor Type Linear Parameter Dependent System Modeling And Control of Lagrange Dynamics

  • Kang, Jin-Shik
    • 제어로봇시스템학회:학술대회논문집
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    • pp.444-448
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    • 2003
  • In this paper, the Lagrange dynamics is studied. A state space representation of Lagrange dynamics and control algorithm based on the state feedback pole placement are presented. The state space model presented is descriptor type linear parameter dependent system. It is shown that the control algorithms based on the linear system theory can be applicable to the state space representation of Lagrange dynamics. To show that the linear system theory can be applicable to the state space representation of Lagrange dynamics, the LMI based regional pole-placement design algorithm is developed and present two examples.

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SPLITTING METHOD OF DENSE COLUMNS IN SPARSE LINEAR SYSTEMS AND ITS IMPLEMENTATION

  • Oh, Seyoung;Kwon, Sun Joo
    • Journal of the Chungcheong Mathematical Society
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    • v.10 no.1
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    • pp.147-159
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    • 1997
  • It is important to solve the large sparse linear system appeared in many application field such as $AA^Ty={\beta}$ efficiently. In solving this linear system, the sparse solver using the splitting method for the relatively dense column is experimentally better than the direct solver using the Cholesky method.

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A case study about exterior space design of apartments using Linear infiltration system (선형침투시스템의 공동주택 외부공간 적용 방안 연구)

  • Moon, Soo-young;Kim, Hyeon-soo;Jang, Dae-hee;Lee, Keon-ho
    • KIEAE Journal
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    • v.7 no.4
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    • pp.9-15
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    • 2007
  • As environmental problems and water-shortage phenomenon become a global issue, many states look for the effective method to use water resources. So, decentralized rainwater management is recognized as a new water management system that rainwater can be infiltrated and used on-site. But it is little difficult to build a park, lake, and forest for evaporating rainwater in city because the land price of city is very high. In order to build an excellent infiltration system for a dwelling and a park in Korea, KICT has developed Linear infiltration system. This infiltration system is consist of first flush treatment, storage and infiltration, overflow control system. These elements are connected closely and working as a combined system. A storm sewer can be changed by the linear infiltration system. This study is to show real application idea about Linear infiltration system with improving some detail in apartments. For this purpose, we devide application idea into the artificial ground and the natural ground and each ground type, suggest a method to cooperate with the other landscape and linear infiltration system. Through this study, we came to recognize a recognition difference of an expert and a commoner about decentralized rainwater management.

A Study on Contact angle of the Linear Guide Way (리니어 가이드 웨이의 접촉각에 관한 연구)

  • Lee, Sun-Kon;Park, Young-Gee
    • Journal of the Korean Society of Safety
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    • v.24 no.4
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    • pp.11-16
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    • 2009
  • This research investigates contact angle of Linear Guide Way through a experimental result and theoretical analysis. Since last ten years, most of researchers who concerned with the precision machinery and semiconductor device production etc. so the researches about Linear Guide Way have been unnoticed. The precision machinery and semiconductor device production system has the principle which transfers the mechanical moving to accuracy position control. The Linear Guide Way system has the principle which transfers mechanical moving to accuracy position control is very important to improve performance of the precision machinery and semiconductor device production system. So, In this research, in order to improvement for producing Linear Guide Way, bearing loading analysis and contact angle change through Linear Guide Way theoretical analysis and bearing modeling. Through this study, we may expect that there will be more improvement for producing Linear Guide Way.

The Stabilized Speed Control Modeling of Single-side Linear Induction Motor Considering End-effect (단부효과가 고려된 편측형 선형유도전동기의 안정속도제어 모델링)

  • Lim, Hong-Woo;Chae, Bong;Choi, Moon-Han;Lee, Kang-Yeon;Cho, Geum-Bae;Baek, Hyung-Lae
    • The Transactions of the Korean Institute of Power Electronics
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    • v.11 no.3
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    • pp.266-273
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    • 2006
  • In difference with the rotary type electrical machinery, the single-sided linear induction motor(SLIM) that generates the direct thrust, is widely used for the operation system of electrified railroad, lope-less elevation system, conveyer system, and so on. The operational principle of single-sided linear induction motor is constructively similar to the general rotary Induction motor It Is difficult to realize the complicate linear induction motor which is applied space vector pulse width modulation(SVPWM) system, but widely used in vector motor control system or servo control system because of its high performance in current control. In this paper, we has modeled the dynamic characteristic analyzing methode, and calculated efficiently the end effect by using equivalent circuit methode in the operating linear Induction motor control system.

Application of Linear Motor for the High-Speed Feed System of Machine Tools (초고속 이송 장치로서 리니어 모터의 적용 연구)

  • 신흥철;최종률
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.621-625
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    • 1996
  • The feed system of the machine tools is limited by the mechanical transmission elements. However, thanks to the advanced modern technology, those machines are able to equip with linear motors. In this paper, the types and application aspects of linear motor are discussed and a synchronous type of the linear motors has been applied to X-Y table for machining center. The performance shows an outstanding result in terms of the accuracy, speed and stiffness. Machine tool system with linear motors is expected to be more productive machines using linear motor in the near next years.

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Fundamental Study of an Integrated Control Method for a Linear Motor Driven Container Crane System

  • An, Sang-Beak;Taniguchi, Yuki;Yamamoto, Shigehiro;Azukizawa, Teruo
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.7
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    • pp.1060-1067
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    • 2009
  • The authors have proposed a linear motor driven container crane system, in which the linear motor to drive trolley chassis is also used to control swaying motion of a hanging container. To utilize the proposed system, it is needed to develop a power saving control system for the linear drive system. In this paper, an integrated control system to minimize required electric power to drive a trolley chassis with the suppressed swaying motion of a hanged container, is proposed. The validity of the proposed control system is investigated by the simulation using Simulink.

Optimal Controller for Near-Space Interceptor with Actuator Saturation

  • Fan, Guo-Long;Liang, Xiao-Geng;Hou, Zhen-Qian;Yang, Jun
    • International Journal of Aeronautical and Space Sciences
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    • v.14 no.3
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    • pp.256-263
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    • 2013
  • The saturation of the actuator impairs the response performance of the near space interceptor control system. A control system based on the properties of linear tracking system is designed for this problem. The properties are that the maximum value of the pseudo-Lyapunov function of the linear tracking control system do not present at the initial state but at the steady state, based on which the bounded stability problem is converted into linear tracking problem. The pseudo-Lyapunov function of the linear tracking system contain the input variables; the amplitude and frequency of the input variables affect the stability of the nonlinear control system. Designate expected closed-loop poles area for different input commands and obtain a controller which is function of input variables. The coupling between variables and linear matrices make the control system design problem non-convex. The non-convex problem is converted into a convex LMI according to the Shur complement lemma and iterative algorithm. Finally the simulation shows that the designed optimal control system is quick and accurate; the rationality of the presented design techniques is validated.

Signalling System Standardization for Linear Induction Motor Type Light Rail Transit (선형유도모터형식 경전철 신호제어시스템 표준사양 연구)

  • Cho, Bong-Kwan;Hwang, Hyeon-Chyeol;Cho, Hong-Shik;Hong, Jai-Sung;Ryu, Sang-Hwan
    • Proceedings of the KIEE Conference
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    • pp.1183-1184
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    • 2007
  • Light Rail Transit (LRT) is optimized vehicle system for complex urban circumstance. LRT systems have many merits such as improved accuracy and safety. There are many LRT systems such as monorail, tram, automated guideway transit, linear induction motor propulsion and so on. These systems have been operated in Japan and other advanced countries. In Korea, local government has many projects to apply the advanced LRT system. But there are no standards regulation, performance test regulation and construction regulation for monorail system, linear induction motor system and tram in Korea. We expect that standardization brings economical construction and safety. The linear induction motor system has been usually applied to subway in Japan and ART(Advanced Rapid Transit) in Canada. In Korea, the linear induction motor system has been adopted for Yong-In LRT and currently under construction. This paper presents signalling system and TCMS(train control and monitoring system) of linear induction motor system.

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A STOCHASTIC EVALUATION METHOD OF ACOUSTIC SYSTEMS BASED ON EQUIVALENT ZERO-MEMORY TYPE NON-LINEAR SYSTEM

  • Minamihara, Hideo;Ohta, Mitsuo
    • Proceedings of the Acoustical Society of Korea Conference
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    • pp.830-835
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    • 1994
  • In this paper, a new method of statistically evaluating an output response probability distribution of a memory type non-linear system is practically derived based on a zero-memory type non-linear equivalent system. That is, first, the objective system is approximately and functionally separated into two functional parts, i.e., a zero-memory type non-linear part and a memory type linear part according to the well-known Wiener's idea. A whole mathematical frame of the output probability distribution is evaluated in an approximate but generalized form, based on the equivalent zero-memory type non-linear part. The memory effects between the input and the output of the system are reflected in the statistical parameters and the expansion coefficients.

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