Search Results - "Oh, Hwa Suk"

Shorter Path Design and Control for an Underactuated Satellite by Oh, Hwa-Suk, Kim, Jichul, Kim, Donghoon, Lee, Jung-Hyung

“…In the event of a control failure on an axis of a spacecraft, a target attitude can be achieved by several sequential rotations around the remaining control…”
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Failure diagnosis of actuator using the EKF and NP theorem by Kim, Donghoon, Choi, Daegyun, Oh, Hwa-Suk

“…There are many classical methods available for generating maneuver commands for spacecraft, where the nominal control system design consists of three torque…”
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Automatic delirium prediction system in a Korean surgical intensive care unit by Oh, Suk-Hwa, Park, Eun-Ju, Jin, Yinji, Piao, Jinshi, Lee, Sun-Mi

“…ABSTRACT Background In Korea, regular screening for delirium is not considered essential. In addition, delirium is often associated with vague concepts, making…”
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Inertia Estimation of Spacecraft Based on Modified Law of Conservation of Angular Momentum by Kim, Dong-Hoon, Choi, Dae-Gyun, Oh, Hwa-Suk

“…In general, the information of inertia properties is required to control a spacecraft. The inertia properties are changed by some activities such as…”
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Reaction Wheel Disturbance Reduction Method Using Disturbance Measurement Table by Cheon, Dong-Ik, Jang, Eun-Jeong, Oh, Hwa-Suk

“…Momentum changing actuators like reaction wheels and control moment gyros are generally used for spacecraft attitude control. This type of actuators produces…”
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Application of a New Efficient Attitude Determination Algorithm on a Ground Simulator by Kim, Dong-Hoon, Lee, Sang-Wook, Lee, Sang-Chul, Oh, Hwa-Suk

“…In general, precise attitude information is required to control a ground simulator, which is designed to simulate attitude control of spacecraft. Two…”
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Precision Measurements of Reaction Wheel Disturbances with Frequency Compensation Process by OH, Hwa-Suk, CHEON, Dong-Ik

“…The reaction wheel, an actuator for satellite attitude control, produces disturbance torque and force as well as axial control torque. The disturbances are so…”
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Inertia Estimation of Spacecraft Based on Modified Law of Conservation of Angular Momentum by Kim, Dong-Hoon, Choi, Dae-Gyun, Oh, Hwa-Suk

“…In general, the information of inertia properties is required to control a spacecraft. The inertia properties are changed by some activities such as…”
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Asymptotic Reduced-Dimensional Steering Strategies for CMG Singularity-Free Control by LEE, Bong-Un, OH, Hwa-Suk, KANG, Ja-Young

“…The geometric singularity problem is one of principal difficulty when using single-gimbal control moment gyros as spacecraft attitude control devices. To…”
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Time Optimal Attitude Maneuver Strategies for the Agile Spacecraft with Reaction Wheels and Thrusters by LEE, Byung-Hoon, LEE, Bong-Un, OH, Hwa-Suk, LEE, Seon-Ho, RHEE, Seung-Wu

“…Reaction wheels and thrusters are commonly used for the satellite attitude control. Since satellites frequently need fast maneuvers, the minimum time maneuvers…”
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Asymptotic Reduced-Dimensional Steering Strategies for CMG Singularity-Free Control by Lee, Bong-Un, Oh, Hwa-Suk, Kang, Ja-Young

“…The geometric singularity problem is one of principal difficulty when using single-gimbal control moment gyros as spacecraft attitude control devices. To…”
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Combined estimation method for inertia properties of STSAT-3 by Kim, Dong Hoon, Yang, Sungwook, Cheon, Dong-Ik, Lee, Sangchul, Oh, Hwa-Suk

“…In general, the information of mass properties is required to control a spacecraft. The mass properties, mass and inertia, are changed by some activities,…”
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Application of a new efficient attitude determination algorithm on a ground simulator by Kim, Donghoon, Lee, Sangwook, Lee, Sangchul, Oh, Hwa-Suk

“…In general, precise attitude information is required to control a ground simulator, which is designed to simulate attitude control of spacecraft. Two…”
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Time Optimal Attitude Maneuver Strategies for the Agile Spacecraft with Reaction Wheels and Thrusters by Lee Byung-Hoon, Lee Bong-Un, Oh Hwa-Suk, Lee Seon-Ho, Rhee Seung-Wu

“…Reaction wheels and thrusters are commonly used for the satellite attitude control. Since satellites frequently need fast maneuvers, the minimum time maneuvers…”
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High-resolution and high-intensity neutron diffractometer with linear position-sensitive detector by Lee, Chang-Hee, Moon, Myung-Kook, Em, V.T., Choi, Young-Nam, Oh, Hwa-Suk, Nam, Uk-Won

“…The characteristics of a neutron diffractometer using a 3 He one-dimensional position-sensitive detector (PSD) with delay line readout, a 200 (length) × 100…”
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A SINGULARITY AVOIDANCE STEERING LAW BASED ON THE MINIMIZATION TECHNIQUE by Oh, Hwa-Suk, Lee, Bong-Un, Rhee, Seung-Wu, Lee, Seon-Ho

“…Geometric singularity problems are principle difficulties of single-gimbal control moment gyros in spacecraft attitude control. To overcome these…”
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Remaining useful life prediction of reaction wheel motor in satellites by Yun, Yuri, Lee, Junyong, Oh, Hwa-suk, Choi, Joo-Ho

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DESIGN OF A LOW-COST 2-AXES FLUXGATE MAGNETOMETER FOR SMALL SATELLITE APPLICATIONS by Kim, Su-Jeoung, Moon, Byoung-Young, Chang, Young-Keun, Oh, Hwa-Suk

“…This paper addresses the design and analysis results of a 2-axes magnetometer for attitude determination of small satellite. A low-cost and efficient 2-axes…”
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Description of the first lithostrotian titanosaur embryo in ovo with Neutron characterization and implications for lithostrotian Aptian migration and dispersion by Grellet-Tinner, Gerald, Sim, Cheul Muu, Kim, Dong Hee, Trimby, Patrick, Higa, Alessandra, An, Seung Lak, Oh, Hwa Suk, Kim, TaeJoo, Kardjilov, Nikolay

“…Although titanosaurs represent one of the most diverse radiations of non-avian dinosaurs during the Cretaceous, our knowledge of their early developmental…”
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DEVELOPMENT OF ULTRA-LIGHT 2-AXES SUN SENSOR FOR SMALL SATELLITE by Kim, Su-Jeoung, Kim, Sun-Ok, Moon, Byoung-Young, Chang, Young-Keun, Oh, Hwa-Suk

“…This paper addresses development of the ultra-light analog sun sensors for small satellite applications. The sun sensor is suitable for attitude determination…”
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