• Journal of the Korean Society for Aeronautical & Space Sciences
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• 제36권5호
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• pp.514-523
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• 2008

This paper presents a single-axis simulator developed to verify the attitude control algorithm of KAUSAT-2 satellite. Named KAUSatSIM, the simulator is composed of a single-axis rotation table using an air-bearing that simulates a frictionless environment, as well as sensors and momentum wheel that was used on KAUSAT-2. The simulator can be utilized for verification of KAUSAT-2 attitude control algorithm, development of new algorithms, and verification of performance. Tests were performed on the single-axis rotation simulator using the momentum wheel in order to verify the attitude control algorithm of KAUSAT-2. Satisfactory test results were obtained by designing a wheel controller that employs the proportional-derivative control method. In addition, a propulsion system was added and tested for development of a new satellite attitude control algorithm.

• Journal of the Korean Society of Propulsion Engineers
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• 제2권1호
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• pp.13-20
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• 1998

A steady-state and dynamic simulation program for a small multi-purpose turboshaft engine with the free power turbine was developed. In order to reduce developing cost, time and risk, a turbojet engine whose performance was well-known was used for the gas generator, and life time was improved by replacing turbine material and by using Larson-Miller curves. The component characteristic of the power turbine was derived from scaling the gas generator turbine. Equilibrium equations of mass flow rate and work were used for the steady-state performance analysis, and the Constant Flow Method(CMF) was used for the dynamic performance simulation. The step fuel scheduling was carried out for acceleration in the dynamic simulation. Through this simulation, it was found that the overshoot of the turbine inlet temperature exceeded over the compressor turbine limit temperature.

• The Journal of Korean Institute of Communications and Information Sciences
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• 제39C권1호
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• pp.82-89
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• 2014

Recently, inertial sensors are popularly used for the location and position recognition of small devices for M2M/IoT. In this paper, we designed low power, low noise, small sized 6-axis inertial sensor IC for mobile applications, which uses a 3-axis piezo-electric gyroscope sensor and a 3-axis piezo-resistive accelerometer sensor. Proposed IC is composed of 3-axis gyroscope readout circuit, two gyroscope sensor driving circuits, 3-axis accelerometer readout circuit, 16bit sigma-delta ADC, digital filter and control circuit and memory. TSMC $0.18{\mu}m$ mixed signal CMOS process was used. Proposed IC reduces 27% of the current consumption of LSM330.

• The Korea Swine Journal
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• 제18권2호통권198호
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• pp.187-187
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• 1996

• The Bulletin of The Korean Astronomical Society
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• 제25권2호
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• pp.67-67
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• 2000

• Journal of the Economic Geographical Society of Korea
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• 제6권1호
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• pp.253-255
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• 2003

• Proceedings of the KOR-KST Conference
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• 대한교통학회 1999년도 제36회 학술발표회논문집
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• pp.495-500
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• 1999

• Bulletin of the Korean Space Science Society
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• 한국우주과학회 2000년도 한국우주과학회보 제9권2호
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• pp.67-67
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• 2000

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 한국농업기계학회 1997년도 동계 학술대회 논문집
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• pp.54-60
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• 1997

• 전기의세계
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• 제56권2호
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• pp.39-43
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• 2007