• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1611-1612
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• 2013

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.05a
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• pp.217-218
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• 2011

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.05a
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• pp.345-349
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• 2009

This test cell is developed to the institutes or laboratories research and study gas turbine engine for academic purpose with this test data to provide the fundamentals of operational mechanism and structural configuration, and further to verify thermodynamic calculation The test cell is installed to monitor and compare real-time data with reference engine model performance simulation data. using by NI DAQ(Data acquisition)device and LabVIEW program based on 30lbf-micro turbojet engine.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.12B
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• pp.1659-1669
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• 2011

In this paper, we discuss design and implementation of intelligent retail store management system through the application of RFID technology to effectively manage retail stores. Firstly, we defined functionality required for system development, designed the system structure, and proposed the service control procedures. Secondly, we implemented the designed system, and then conducted related tests to verify functionality and performance of the system. As a result, we confirmed through functional tests including 129 items that everything was normal behavior, and were able to determine the performance through testing of RFID middleware, RFID readers and tags.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.495-498
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• 2010

This test cell is developed to the institutes or laboratories research and study gas turbine engine for academic purpose with this test data to provide the fundamentals of operational mechanism and structural configuration, and further to verify thermodynamic calculation The test cell is installed to monitor and compare real-time data with reference engine model performance simulation data. using by NI DAQ(Data acquisition)device and LabVIEW program based on 80 lbf-micro turbojet engine.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.41 no.10
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• pp.833-839
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• 2013

Thermal vacuum test should be performed prior to launch to verify satellites' functionality in a harsh space environment which is represented by extremely cold temperatures and vacuum conditions. A thermal vacuum chamber which consists of a vacuum vessel, a pumping system, and a thermal control system are used to perform thermal vacuum tests of a satellite system and its components. A cryogenic blower is a core component of the closed loop thermal control system for thermal vacuum chambers. This paper describes the fan design of the cryogenic blower, the design of the thermal protection interface between the driving part and the fluid part, which were verified by thermal and structural analyses. The performance of the cryogenic blower is confirmed by similarity test on the test bench.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.560-562
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• 2017

This paper presents the development and test results of a test rig for confirming the hover performance of the coaxial propeller which is applied to the drone in order to carry out the mission that requires high payload such as the development of the courier drones. the performance of each propeller was measured by varying the thrust and torque according to the H/D ratio. the Thrust sensor and torque sensor were used to measure the thrust and torque generated when the propeller rotated, and a photo sensor was used to measure the rpm. it used the data acquisition system to acquire data from each sensor, and used the Labview softwaer to control data storage, monitoring and BLDC motor control. In the test, each propeller meansured the figure of mefit according to the chansge of the interval at the same rpm.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.4
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• pp.343-352
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• 2016

A multi-rotor vehicle is an unmanned vehicle consisting of multiple rotors. A multi-rotor vehicle can be categorized as tri-, quad-, hexa-, and octo-rotor depending on the number of the rotors. Multi-rotor vehicles have many advantages due to their agile flight capabilities such as the ability for vertical take-off, landing and hovering. Thus, they can be widely used for various applications including surveillance and monitoring in urban areas. Since multi-rotors are subject to uncertain environments and disturbances, it is required to implement robust attitude stabilization and flight control techniques to compensate for this uncertainty. In this research, an advanced nonlinear control algorithm, i.e. sliding mode control, was implemented. Flight experiments were carried out using an onboard flight control computer and various real-time autonomous attitude adjustments. The feasibility and robustness for flying in uncertain environments were also verified through real-time tests based on disturbances to the multi-rotor vehicle.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.34-37
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• 2008

본 논문은 가정용로봇 시스템을 구성하는 핵심기능 컴포넌트에 대하여 시험평가를 위한 규격을 개발하는데 목적이 있다. 이는 2006년 말부터 실제 사업화가 이루어질 우리나라의 지능형 로봇시장을 선점하여 로봇 컴포넌트의 품질 보증을 위한 평가 프로세스 및 절차, 가정용 로봇 시험평가를 위한 테스트케이스, 시험 평가 규격 등의 개발을 내용으로 한다. 따라서, 가정용로봇의 기본적인 필요 특성을 보장하고, 실내/외에서 제공되는 홈 네트워크와의 연동 서비스 및 제어 등의 기능을 수행하기 위한 가정용로봇의 종합적인 기능 확인 및 기본 성능에 대한 시험 평가 분석 항목 및 규격을 제시하는데 본 논문의 목적이 있다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.12
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• pp.1209-1216
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• 2009

This paper presents the pose estimation of a small UAV utilizing visual information from low cost cameras installed indoor. To overcome the limitation of the outside flight experiment, the indoor flight test environment based on multi-camera systems is proposed. Computer vision algorithms for the proposed system include camera calibration, color marker detection, and pose estimation. The well-known extended Kalman filter is used to obtain an accurate position and pose estimation for the small UAV. This paper finishes with several experiment results illustrating the performance and properties of the proposed vision-based indoor flight test environment.