• 한국군사과학기술학회지
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• 제11권1호
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• pp.43-50
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• 2008

The army developed the ATCIS(Army Tactical Command Information System) for the battlefield information system with share the command control information through the realtime. The using the public key and the encryption equipment in the ATCIS is enough to the confidentiality, integrity. But, it is vulnerable about the availability with the zero day attack. In this paper, we implement the worm propagation simulation on the ATCIS infrastructure through the modelling on the ATCIS operation environment. We propose the countermeasures based on the results from the simulation.

• 한국군사과학기술학회지
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• 제10권2호
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• pp.148-151
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• 2007

The CF(Counter-fire) is neutralizing enemy's all command control systems and fire support elements. It will weaken a battle continuous ability and an intension to fight. At the beginning of the CF is obtaining locations of targets using various detection assets. CF command center processes acquired target information and send it to attacking equipments. The targets are classified into two classes, preplanned target and target of opportunity The target of opportunity is potential threaten, so it needs to take a immediate and exact process for determining location of target of opportunity. This paper proposes the real-time processing algorithm for offensive weapons to strike target of opportunity, and presents the result of its performance.

• 한국추진공학회지
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• 제19권2호
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• pp.9-16
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• 2015

고체 추진제를 연료로 사용하는 DACS의 압력 및 추력을 동시에 제어하기 위한 제어기법을 제안하였다. 두 제어변수를 효과적으로 제어하기 위하여 각 변수의 물리적 특성을 고려한 연속형 루프 닫힘 구조를 적용하였고, 부정정 구조를 가진 제어명령을 효율적으로 분배하기 위하여 가중벡터를 이용한 의사 역행열 기법을 제안하였다. 아울러 높은 가속도를 안정적으로 획득하기 위하여 압력 유도기법을 종말 호밍구간에 적용함으로써 추력과 압력에 관한 명령 분배의 효용성을 입증하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.57-62
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• 2004

This paper deals with a waypoint trajectory following problem for the tilt-rotor UAV under development in Korea (TR-KUAV). In this problem, dynamic model inversion based on the linearized model and Sigma-Phi neural network with adaptive weight update are involved to realize the waypoint following algorithm for the vehicle in the helicopter flight mode (nacelle angle=0 deg). This algorithms consists of two main parts: outer-loop system as a command generator and inner-loop system as stabilizing controller. In this waypoint following problem, the position information in the inertial axis is given to the outer-loop system. From this information, Attitude Command/Attitude Hold logic in the longitudinal channel and Rate Command/Attitude Hold logic in the lateral channel are realized in the inner-loop part of the overall structure of the waypoint following algorithm. The nonlinear simulation based on the TR-KUAV is carried out to evaluate the stability and performance of the algorithm. From the numerical simulation results, the algorithm shows very good tracking performance of passing the waypoints given. Especially, it is observed that ACAH/RCAH logic in the inner-loop has the satisfactory performance due to adaptive neural network in spite of the model error coming from the linear model based inversion.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2648-2653
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• 2003

This paper describes the development of a 3-DOF laparoscopic assistant robot system with motor-controlled bending and zooming mechanisms using the voice command motion control and auto-tracking control. The system is designed with two major criteria: safety and adaptability. To satisfy the safety criteria we designed the robot with optimized range of motion. For adaptability, the robot is designed with compact size to minimize interference with the staffs in the operating room. The required external motions were replaced by the bending mechanism within the abdomen using flexible laparoscope. The zooming of the robot is achieved through in and out motion at the port where the laparoscope is inserted. The robot is attachable to the bedside using a conventional laparoscope holder with multiple DOF joints and is compact enough for hand-carry. The voice-controlled command input and auto-tracking control is expected to enhance the overall performance of the system while reducing the control load imposed on the surgeon during a laparoscopic surgery. The proposed system is expected to have sufficient safety features and an easy-to-use interface to enhance the overall performance of current laparoscopy.

• 한국항공우주학회지
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• 제47권3호
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• pp.212-219
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• 2019

군사 작전 환경에서 무인 항공기의 활용도가 확대됨에 따라 효율적인 무인기 제어 방식에 대한 연구가 활발하다. 특히 신속한 임무 처리가 요구되는 군 환경에서 기존의 버튼 방식이 지닌 조작의 불편함을 해소하려는 목적으로 음성인식을 통한 무인기 제어 방식이 시도되고 있으며, 아직 초기연구 수준에 머물러 있다. 본 연구에서는 음성 기반의 무인기 제어를 위해 효율적인 음성인식 시스템 운용 체계를 제안한다. 특히 지상관제 센터에 의한 무인기 제어보다는 유/무인기 협업 환경에서 유인기 조종사가 무인기를 직접 통제하는데 효율적인 음성인식 시스템 운용 방식을 제안하며, 음성인식 실험을 통해 운용 체계의 효율성을 검증한다.

• 한국안전학회지
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• 제14권2호
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• pp.52-61
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• 1999

This paper proposes the application of fuzzy control for high performance control of induction motor using electric vehicles. A fuzzy controller converts a set of liguistic rules based on expert knowledge into a automatic control strategy. Such controllers have often been found superior to conventional controllers especially when information being processed is inexact and uncertain. A system with fast torque response is very beneficial in applications where direct self control (DSC) is highly desirable. The response of DSC is slower during startup and during change in command torque. Fuzzy control is used for implementation of DSC to improve its slow response. Simulation implementation of the fuzzy logic controller was carried out to verify the behavior of the controller. The simulation results with fuzzy control are compared with those of the conventional DSC. The starting flux and torque response and the responses to the step changes in command torque with fuzzy implementation show a considerable improvement over the conventional control. The steady state responses in both the cases are the same.

• 한국정보통신학회논문지
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• 제24권4호
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• pp.546-552
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• 2020

원격제어서버와 작동기가 무선네트워크를 통해 연결되어 동작하는 원격제어시스템은 그 편의성이 큰 만큼 잠재된 위험성도 크다. 신뢰할 수 없는 무선 채널로 인해 제어명령이 유실될 수 있기 때문이다. 지능형원격제어시스템은 작동기에 제어명령을 유추할 수 있는 기능을 추가하여 제어명령을 수신하지 못하는 경우에도 동작하도록 해주는 시스템이다. 본 논문에서는 지능형원격제어시스템 테스트베드를 구현하여 원격제어시스템에서 발생할 수 있는 문제 상황들을 실험을 통해 확인하고 지능형원격제어시스템이 문제를 해결하는 것을 검증하였다. 지능형원격제어시스템은 일반적인 원격제어시스템이 높은 통신오버헤드를 감수해야 달성할 수 있는 성능을 더 적은 통신오버헤드만으로도 달성할 수 있음을 확인하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.47-50
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• 1995

This paper concerns an adaptive control scheme which is an extension of the simplified adaptive control. Originally, the SAC approach was developed based on the command generator tracker (CGT) theory for perfect model tracking. An attractive point of the SAC is that a control input can be synthesized without any prior knowledge about plant structure. However, a feedforward dynamic compensator of the CGT is removed from the basic structure of the SAC. This deletion of the compensator makes perfect model tracking difficult against even a step input. In this paper, an adaptive control system is redesigned to achieve perfect model tracking for as long as possible by reviving the dynamic compensator of the CGT. The proposed method is applied to slewing control of a flexible space structure and compared to the SAC responses.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2008년도 추계학술대회 및 정기총회
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• pp.348-352
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• 2008

KJCCS(Korean Joint Command & Control System) is a system that integrate each military tactics C4ISR into JCS(Joint Chiefs of Staff) level. It is established in major CP(Commanding Post) and provides all battlefield situation in real time by sharing that between connection troops. The objective of this study is to suggest a way for the measurement of force improvement effectiveness of KJCCS. C2 model is applied to measure force improvement effectiveness of KJCCS. This study will be also present a requirement logic for C4ISR system acquisition later.