Drake's Webpage

“A pig who doesn’t fly is just an ordinary pig,”

- Porco Rosso in "Crimson Pig(1992)" by Hayao Miyazaki -

Hyungjoo "Drake" Yoon, Ph.D.

AOCS Principal Researcher

Satellite Control System Department

Korea Aerospace Research Institute (KARI)

(Office) +82-42-870-3711 (Fax) +82-42-860-2898

Email : drake"dot"yoon "at" gmail"dot"com


  • Spacecraft attitude and orbit control (CMG/VSCMG/RW, Autonomous rendezvous & docking)

  • Adaptive optics and laser beam jitter control (Adaptive filtering techniques)

  • Adaptive control of uncertain nonlinear MIMO systems

  • Robust control of flexible large structures

  • High-precision thermal control in semiconductor/LCD fabrication


  • Georgia Institute of Technology --- Atlanta, GA, USA

- Ph.D. in Aerospace Engineering (2004)

  • Korea Advanced Institute of Science and Technology (KAIST) --- Daejeon, Korea

- M.S. & B.S in Aerospace Engineering (1996/1994)

Professional Employments

    • Korea Aerospace Research Institute, Daejeon, Korea (2010~present)

- Senior Researcher, Satellite Control System Department

    • U.S. Naval Postgraduate School, Monterey, CA, USA (2007~2010)

- NRC Research Associate, Spacecraft Research and Design Center

- Sponsored by the National Research Council (U.S.)

    • Samsung Electronics, Suwon, Korea (2004~2007)

- Sr. Engineer, Mechatronics R&D Center

    • Korea Air Force Academy, Korea (1996~1999)

- Full-time Lecturer, Dept. of Aerospace Engineering


    • “Spacecraft Attitude and Power Control Using Variable Speed Control Moment Gyros”

- Ph.D. Thesis (Advisor : Prof. Panagiotis Tsiotras), (pdf)

    • “Satellite Attitude Control Using Quaternion Parameters”

- M.S. Thesis (Advisor: Prof. Min-Jea Tahk)

Journal Publications (International Only)

  • Yoon, H. and Tsiotras, P., “Spacecraft Adaptive Attitude and Power Tracking with Variable Speed Control Moment Gyroscopes”, AIAA Journal of Guidance, Control, and Dynamics, Vol. 25, No. 6, pp. 1081-1090, 2002

  • Yoon, H. and Tsiotras, P., “Singularity Analysis of Variable Speed Control Moment Gyros", AIAA Journal of Guidance, Control, and Dynamics, Vol. 27, No. 3, pp. 374-386, 2004

  • Yoon, H. and Tsiotras, P., “Spacecraft Line-of-Sight Control Using a Single Variable-Speed Control Moment Gyro”, AIAA Journal of Guidance, Control, and Dynamics, Vol. 29, No. 6, pp. 1295-1308, 2006

  • Yoon, H. and Tsiotras, P., “Adaptive Spacecraft Attitude Tracking Control with Actuator Uncertainties”, Journal of the Astronautical Sciences, Vol. 56, Issue 2, pp. 251-268, April-June, 2008.

  • Yoon, H. and Agrawal, B.N., "Novel Expressions of Equations of Relative Motion and Control in Keplerian Orbits", AIAA Journal of Guidance, Control, and Dynamics, Vol. 32, No. 2, pp. 664-669, 2009.

  • Yoon, H. and Agrawal, B.N., "Adaptive Control of Uncertain Hamiltonian Multi-Input Multi-Output Systems : With Application to Spacecraft Control", IEEE Transactions on Control Systems Technology, Vol. 17, No. 4, pp.900-906, 2009.

  • Yoon, H., Bateman, B.E., and Agrawal, B.N., "Laser Beam Jitter Control Using Recursive-Least-Square Adaptive Filters", ASME Journal of Dynamic Systems, Measurement and Control, Vol. 133, Issue 4, 041001, July 2011.

  • Park, S., Song, J.W., Lee, B., Yoon, H., Lee, Y.J., and Sung, S., "Autonomous Oscillation Control Loop Design for Amplitude Controlled, Frequency Read-Out-Type Resonant Sensors", IEEE Transactions on Mechatronics, Vol. 17, No. 6, pp. 1009-1020, Dec. 2012.

  • Beerer, M.J., Yoon, H. (corr. author), and Agrawal, B.N., "Practical adaptive filter controls for precision beam pointing and tracking with jitter attenuation", Control Engineering Practice, Vol. 21, Issue 1, pp. 122–133, Jan. 2013.

  • Yoon, H., et al, "Absolute Misalignment Estimation with Respect to a Scanning Image Sensor", Remote Sensing Letters, Vol. 4, No. 8, pp.754-763, May 2013

  • Yoon, H., Eun, Y., and Park, C., "Adaptive Tracking Control of Spacecraft Relative Motion with Mass and Thruster Uncertainties", Aerospace Science and Technology, Vol.34, pp.75-83, April 2014

  • Yoon, H., Seo, H.H., and Choi, H.T., "Optimal Uses of Reaction Wheels in the Pyramid Configuration Using a New Minimum Infinity-Norm Solution", Aerospace Science and Technology, Vol.39. pp. 109-119, Sept. 2014 (pdf)

  • Kim, D-K., Yoon, H., Kang, W.W., Kim, Y.B., Choi, H.T., "Development of a Spherical Reaction Wheel Actuator using Electromagnetic Induction", Aerospace Science and Technology, Vol.39. pp. 86-94, Sept. 2014 (pdf)

  • Yoon, H., Hwang, J-Y., and Park, C., "A New Minimum Infinity-Norm Solution: with Application to Spacecraft Attitude Controls", will be submitted soon for journal publication.

This web page is always under construction. (Last Update : Aug. 2020)