• 한국시뮬레이션학회논문지
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• 제15권4호
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• pp.41-50
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• 2006

통신망을 구성하는 각종 장비들을 관리하기 위한 에이전트 시스템은 보통 실제자원이 완성된 후에 개발을 시작하거나, 실제자원에 독립적인 망 관리 플랫폼을 이용하여 개발할 수 있다. 본 논문에서는 이와 같은 방법을 따르지 않고 실제자원이 없는 단계에서도 미리 실제자원의 역할을 수행할 수 있는 실제자원 시뮬레이터를 설계한다. 실제자원 시뮬레이터는 특정 애프리뷰트의 값과 통고를 지정된 random 함수에 따라 자동으로 발생시키는 역할을 수행한다. 또한 본 논문에서는 실제자원 시뮬레이터의 동작을 수행하기 위해 기존 GDMO 문법에 시뮬레이션 문법을 추가한 E-GDMO 문법과, E-GDMO 컴파일러를 설계한다.

• The Journal of Korean Physical Therapy
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• 제16권3호
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• pp.152-160
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• 2004

The purpose of this study was to investigate the effect of elastic band based of PNF pattern on the U/E function in the spinal cord injury patient. 11 subjects with spinal cord injury participated in this study. They took elastic band excercise 5 times per week for 8 weeks. One time excercise spent 35minutes. The therapeutic effect was evaluated by Cybex 6000, BTE Work Simulator, how many seconds they needed to walk 100 meters. 11 cases were examined before, after 8 week, elastic band excercise. The results of this study are as follows; 1. Isokinetic power by Cybex 6000 : The elbow flexion, shoulder flexion and extension were significant difference between test-retest(p<.05). but elbow extension were not significant difference between test-retest. 2. BTE Work Simulator : Wheelchair Propulsion and Steering Torque were significant difference between test-retest(p<.05). 3. Wheelchair Propulsion velocity : There were significant difference between test-retest(p<.05). The findings suggest that SCI patients can improve their Isokinetic power on shoulder and elbow joint, wheelchair propulsion and Steering Torque by BTE Work Simulator, Wheelchair Propulsion velocity through elastic band based of PNF pattern.

• 한국군사과학기술학회지
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• 제16권5호
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• pp.666-674
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• 2013

This paper studied about the design and implementation of tactical communication network simulator in order to obtain tactical communication network parameter, such as link capacity and routing plan, and a number of exceptional cases that may occur during actual deployment by conducting simulation of a large-scale tactical communication networks. This tactical communication network simulator provides equipment models and link models of commercial OPNET simulator for tactical communication network. In addition, 6 types of simulation scenario writings convenience functions and traffic generation models that may occur in situations of tactical communication network environment were implemented in order to enhance user friendliness. By taking advantages of SITL(System-In-The-Loop) function of OPNET, the tactical communication network simulator allows users to perform interoperability test between M&S models and actual equipment in operating simulation of tactical communication network, which is run on software. In order to confirm the functions and performance of the simulator, small-scale of tactical communication network was configured to make sure interoperability between SITL-based equipment and a large-scale tactical communication network was simulated and checked how to cope with traffic generated for each network node. As the results, we were able to confirm that the simulator is operated properly.

• 한국기계가공학회지
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• 제9권6호
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• pp.87-94
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• 2010

In this paper, a new simulator of the biped robot for planning walking patterns was showed. And this simulator(MHBiped) is able to not only visualize the plan of patterns but also verify whether a biped robot design is suitable. In addition, MHBipd can modify various kinds of walking parameters and the trajectory of biped robot. Therefore, a new biped robot can be designed easily by the this simulator before you apply to a robot. As a result, a well-balanced parameters of walking patterns watching the movement of CG and ZMP can be obtained. Walking patterns should be changed according to both the existence of obstacles and conditions of ground and it can be described by the trajectory of hip and ankles. All those trajectorys can be also obtained by the cubic spline functions and the way of modeling walking patterns. The results of simulator, the movement function of CG and ZMP, the cubic spline functions and modeling of biped robot were introduced in this paper. And the effectiveness of this simulator was confirmed by the simulations.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1109-1114
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• 2007

This paper presents the road simulator control technology for reproducing the road input signal to implement the real road data. The simulator consists of the hydraulic pump, servo valve, hydraulic actuator and its control equipment. The QFT is utilized to control the simulator effectively. The control system illustrates a tracking performance of the closed-loop controller with low order transfer function G(s) and pre-filter F(s) for a parametric uncertain model. A force controller is designed to communicate the control signal between simulator and digital controller. The efficacy of the QFT force controller is verified through the numerical simulation, in which combined dynamics and actuation of the hydraulic servo system are tested. The simulation results show that the proposed control technique works well under uncertain hydraulic plant system. The conventional software (Labview) is used to make up for the real controller in the real-time basis, and the experimental works show that the proposed algorithm works well for a single road simulator.

• 대한기계학회논문집A
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• 제31권11호
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• pp.1069-1076
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• 2007

This paper presents the road simulator control technology for reproducing the road input signal to implement the real road data. The simulator consists of the hydraulic pump, servo valve, hydraulic actuator and its control equipment. The QFT(Quantitative Feedback Theory) is utilized to control the simulator effectively. The control system illustrates a tracking performance of the closed-loop controller with low order transfer function G(s) and pre-filter F(s) for a parametric uncertain model. A force controller is designed to communicate the control signal between simulator and digital controller. Tracking specification is satisfied with upper and lower bound tolerances on the steep response of the system to the reference signal. The efficacy of the QFT force controller is verified through the numerical simulation, in which combined dynamics and actuation of the hydraulic servo system are tested. The simulation results show that the proposed control technique works well under uncertain hydraulic plant system. The conventional software (Labview) is used to make up for the real controller in the real-time basis, and the experimental works show that the proposed algorithm works well for a single road simulator.

• 대한기계학회논문집A
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• 제32권3호
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• pp.280-289
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• 2008

This paper presents design of the quantitative feedback control system of the three axes hydraulic road simulator with respect to the dummy wheel for uncertain multiple input-output(MIMO) feedback systems. This simulator has the uncertain parameters such as fluid compressibility, fluid leakage, electrical servo components and nonlinear mechanical connections. This works have reproduced the random input signal to implement the real road vibration's data in the lab. The replaced $m^2$ MISO equivalent control systems satisfied the design specifications of the original $m^*m$ MIMO control system and developed the mathematical method using quantitative feedback theory based on schauder's fixed point theorem. This control system illustrates a tracking performance of the closed-loop controller with low order transfer function G(s) and pre-filter F(s) having the minimum bandwidth for parameters of uncertain plant. The efficacy of the designed controller is verified through the dynamic simulation with combined hydraulic model and Adams simulator model. The Matlab simulation results to connect with Adams simulator model show that the proposed control technique works well under uncertain hydraulic plant system. The designed control system has satisfied robust performance with stability bounds, tracking bounds and disturbance. The Hydraulic road simulator consists of the specimen, hydraulic pump, servo valve, hydraulic actuator and its control equipments

• 한국전자파학회논문지
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• 제30권1호
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• pp.70-78
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• 2019

본 논문에서 통합 전장 시뮬레이터 환경인 AddSIM에서 레이다 동작을 모의하기 위한 고해상도 다기능 레이다의 모델링을 제안한다. 다기능 레이다 모델을 AddSIM에 연동하기 위해, 모델링은 물리부, 논리부, 정보부로 구성된 컴포넌트 기반의 구조를 가져야 한다. 이를 위해, 레이다의 RF 하드웨어부를 물리부로, 제어부를 논리부로, 레이다의 RF 제원을 정보부로 각각 분리한다. 레이다의 물리부/논리부에 대한 세부 모델링 방법을 기술하며, 공학급 레벨의 시뮬레이션을 위한 데이터 구조 또한 제시한다. 다중 표적이 교전하는 시나리오에서 다기능 레이다의 성능이 수치적으로 분석하며 제안된 모델에 대한 타당성을 검증한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.179-182
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• 1997

In a training simulator for power plant, operator's action in the MCR(Main Control Room) are given to plant process and computer system model as an inputs, and the same response as in real power plant is provided in real time. Inter-process communication and synchronization are especially important among various inputs. In the plant simulator, to simulate the digital control system such as FOXBORO SPEC-200 Micro control system, modification and adaptation of control card(CCC) and its continuous display station(CDS) is necessary. This paper describes the modeling and simulation of FOXBORO SPEC-200 Micro control system applied to Younggwang nuclear power plant unit #3 & 4, and its integration process to the full-scope replica type training simulator. In a simulator, display station like CDS of FOXBORO SPEC-200 Micro control system is classified as ITI(Intelligent Type Instrument), which has a micro processor inside to process information and the corresponding alphanumeric display, and the stimulation of ITI limits the important functions in a training simulator such as backtrack, replay, freeze and IC reset. Therefore, to achieve the better performance of the simulator, modification of CDS and special firmware is developed to simulate the FOXBORO SPEC-200 Micro control system. Each control function inside control card is modeled and simulated in generic approach to accept the plant data and control parameter conveniently, and debugging algorithms are applied for massive coding developed in short period.

• 대한기계학회논문집
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• 제15권2호
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• pp.497-506
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• 1991

In this paper, a new construction for training simulator of R/C helicopter based on two types of servo controller is proposed. Two modified algorithms (algorithm I and II) for servo controller design are presented. Algorithm I is developed by adopting Davison's method in the case that the expressions for the homogeneous differential equations of reference input and disturbance are different types, and algorithm II is done by considering error weighting function for the servo controller of algorithm I . The linear fractional transformation method is incorporated in both design methods in order to assign the closed loop poles of the servo system in a specified region. The helicopter simulator is composed by the gimbals with two freedom of rolling and pitching. The reliability and validity for the design methods of the proposed servo controller are investigated through the practical experiment for the simulator by using 16bits micro-computer with A/D and D/A converters. It can be observered from the experimental results that the proposed servo controller is applicable to practical plants since the simulator is robust for the arbitrary disturbance and it follows to the given reference input without significant steady state error.