• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.527-528
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• 2015

최근 다양한 디지털기기에 따른 DC 부하의 증가와 함께 기존 배전망과 연계하여 운용할 수 있는 AC 그리드와 태양광과 연료전지 같은 DC 전원에 직접적으로 연계하여 운용하는 DC 그리드를 통합하는 AC/DC 마이크로그리드에 대한 연구가 진행되고 있다. 본 논문에서는 AC 그리드와 DC 그리드를 연계 제어하는 연계(interlinking) 컨버터의 제어기를 설계하고 성능을 검토하기 위해 TMS320F28335 DSP(Digital Signal Processor)와 실시간 디지털 시뮬레이터인 eMEGAsim으로 구성된 HILS(Hardware-in-the-Loop Simulation) 시스템을 구축하고 설계된 제어기의 성능을 테스트하였다.

• 제어로봇시스템학회논문지
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• 제21권11호
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• pp.1027-1033
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• 2015

For the attitude control of spacecraft, two variable-speed control moment gyros are proposed as main actuators in the article. Since a variable-speed control moment gyro (VSCMG) makes two control torques (gyroscopic torque and reaction torque), two VSCMGs are sufficient for controlling 3-axes attitude. Additionally, there are no singular conditions for two non-parallel VSCMGs. Since gyroscopic torque is usually much greater than reaction torque, the control performances of approximately 3 axes may not be the same. However, several missions can be accomplished by controlling two axes. For such missions, a selective axes control method is proposed. The method selects two axes for a certain task and controls the attitude of the selected axes. For the remaining axis, angular speed is controlled for stabilization. A hardware-in-the-loop simulation has been used to test VSCMG modules and to verify the proposed method. Two VSCMGs can be alternative actuators for small satellites.

• 대한전기학회논문지:전력기술부문A
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• 제51권12호
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• pp.611-623
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• 2002

This paper introduce the real time digital simulator which is located in Korea Electric Power Research Institute. This paper also describes the methodology for the performance test of the PSS using KEPS. This test is to get a high degree of the confidence of the developed PSS before it is installed into the real power system. This has been performed in the form of closed-loop tests in which Simulator and PSS are connected and signals come and back interactively. Many tests have successfully done using KEPS which consists of 26 RTDS racks, under the large-scale power system. The simulated reduced KEPCO power system contains 88 generators and 295 buses. Through the AVR step, three phase fault and active power variation test, the effectiveness of developed PSS has been proved. This paper also presents the overview of KEPS and hardware of protype PSS.

• 대한전기학회논문지
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• 제35권10호
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• pp.458-464
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• 1986

This paper introduces a method for design verification and performance evaluation of flight control system. The method is a real time hardware in the loop simulation using the hybrid computer and motion table facility. As a typical illustration, a roll control system of flight vehicle is applied. The simulation validity is demonstrated by comparing hardware test results with analog simulation results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2013년도 추계학술대회 논문집
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• pp.37-38
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• 2013

This paper presents an intuitive and powerful way to study and design motor drive control. The control of induction motors, as most widely used machines, is discussed. Thanks to ultra low latency and high fidelity Hardware-in-the-Loop systems, different aspects of up-to-date drive regulation are examined. A power stage, comprised of a grid voltage source, a rectifier, a VSC inverter and an induction motor, is emulated on the HIL platform in real time. A digital signal controller is plugged into the interface board and connected to the HIL emulation platform, without any hardware modifications. For motor control and power electronics applications, a dedicated Texas Instruments TMS320F2808 DSP is chosen. The same controller can drive an emulation platform and a real device with no modifications. Current and speed control loop test results are presented and discussed.

• 대한산업공학회지
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• 제25권2호
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• pp.282-289
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• 1999

To minimize a real world test of underwater guided vehicle, it is necessary to perform a test on ground by using closed loop test techniques. This paper describes implementation of HILS(Hardware In the Loop Simulation) system for ground test and test methodologies for performance evaluation of a guided weapon. HILS system uses a real time distributed computer and a real time processing technique. Ground test results of underwater vehicle are presented for moving and stationary targets by using HILS system.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 춘계학술대회 논문집
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• pp.223-224
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• 2008

• 대한전자공학회논문지TE
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• 제37권1호
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• pp.50-57
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• 2000

무선 통신 기술의 발전으로 기존 유선 전화 선로를 무선으로 대체하고자 하는 무선 가입자망 (WLL) 의 상용화가 가속화되고 있다. WLL(Wireless Local Loop) 기술을 적용함으로써 사업자는 유선 선로에 비해 설치 및 유지 보수등의 이점을 얻게 되고, 가입자는 전화 서비스외에 고속의 부가 서비스를 제공받을 수 있는 장점등의 이유로 많은 통신 업체와 사업자들의 큰 관심과 함께 개발과 적용이 늘고 있다. 본 논문에서는 WLL 시스템 구성중 기지국 제어기 시스템의 하드웨어(Hardware) 구현에 관한 것으로, 기지국 제어기의 시스템 하드웨어 구성과 기능 및 시스템 IPC(Inter Processor Communication) 구조등의 개발 내용을 기술하였다. 그리고 개발 시스템 검증은 IPC Backplane 버스를 통한 모듈간 통신 시험에 의해서 수행하였다. 모듈간의 반복적인 데이터 통신시험과 동시에 신호파형 측정으로 기본적인 시스템 통합시험을 완료하였다.

• 한국항공우주학회지
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• 제46권12호
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• pp.1012-1020
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• 2018

한국항공우주연구원에서 개발된 틸트로터 무인기의 임무비행 능력을 높이기 위하여, 무인기의 자율화 기술 5단계 수준의 편대비행에 대한 연구가 수행되었다. 편대비행은 선행기와 추종기로 구성된 중앙 집중형 방식이 적용되었다. 편대비행 제어기는 3대의 추종기를 이용한 수치 시뮬레이션과 1대의 추종기를 이용한 하드웨어 기반 시뮬레이션을 통해 검증되었다. 본 논문에서는 제어기 설계 방법, 하드웨어 기반 시뮬레이션 시험, 그리고 시뮬레이션을 통한 성능 검증에 대해서 기술하였다.

• Current Optics and Photonics
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• 제7권6호
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• pp.745-754
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• 2023

In order to test the recognition ability and accuracy of a target imaging simulator under the irradiation of solar stray light in a laboratory environment, it needs to be fixed on a five-axis turntable during a hardware-in-the-loop simulation test, so the optical system of the simulator should have a long exit pupil distance. This article adopts a secondary imaging method to design a projection optical system suitable for thin-film-transistor liquid crystal displays. The exit pupil distance of the entire optical system is 1,000 mm, and the final optimization results in the 400 nm-850 nm band show that the modulation transfer function (MTF) of the optical system is greater than 0.8 at the cutoff frequency of 72 lp/mm, and the distortion of each field of view of the system is less than 0.04%. Combined with the design results of the optical system, TracePro software was used to model the optical system, and the simulation of the target imaging simulator at the magnitude of -1 to +6 Mv was analyzed and verified. The magnitude error is less than 0.2 Mv, and the irradiance uniformity of the exit pupil surface is greater than 90%, which meets the requirements of the target imaging simulator.