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Publications
"Planning and Control of Under-actuated Mobile Manipulators Using Differential Flatness,"
Autonomous Robots (conditionally accepted).
Ji-Chul Ryu, Vivek Sangwan, and Sunil K. Agrawal,
"Differentially Flat Designs of Under-Actuated Mobile Manipulators,"
ASME Transactions, Journal of Dynamic Systems, Measurement, and Control, accepted.
Amy Lynch, Ji-Chul Ryu, Sunil K. Agrawal, and James C. (Cole) Galloway,
"Power mobility training for a 7-month-old infant with spina bifida,"
Pediatric Physical Therapy, in press.
Ji-Chul Ryu, Sunil K. Agrawal and Jaume Franch,
"Motion Planning and Control of a Tractor with a Steerable Trailer Using Differential Flatness,"
ASME Transactions, Journal of Computational and Nonlinear Dynamics, Vol. 3, No. 3, pp. 031003 (8 pages), 2008.
Ji-Chul Ryu, Kaustubh Pathak, and Sunil K. Agrawal,
"Control of a Passive Mobility Assistive Robot ,"
ASME Transactions, Journal of Medical Devices, Vol. 2, No. 1, pp. 011002 (7 pages), 2008.
James C. (Cole) Galloway, Ji-Chul Ryu, Sunil K. Agrawal,
"Babies driving robots: Self-generated mobility in very young infants,"
Journal of Intelligent Service Robotics, Vol. 1, No. 2, pp. 123-134, 2008.
Sunil K. Agrawal and Ji-Chul Ryu,
"Design of Dissipative and Stable Assist Robots,"
ASME Transactions, Journal of Mechanical Design, Vol. 129, No. 12, pp. 1251-1255, 2007.
So-Ryeok Oh, Ji-Chul Ryu, and Sunil K. Agrawal,
"Dynamics and Control of Helicopters with a Six-Cables Suspended Robot,"
ASME Transactions, Journal of Mechanical Design, Vol. 128, No. 5, pp. 1113-1121, 2006.
Ji-Chul Ryu, Tae-Goo Kang, and Young-Ho Cho,
"Electromagnetic Microactuators with the Electroplated Planar Coils Driven by Radial Magnetic Field,"
Journal (A) of the Korean Society of Mechanical Engineers, Vol. 25, No 1, pp. 16-24, 2001.
(Under Review)
Jaime Gomez, Ji-Chul Ryu, Sergio Alonso, and Sunil K. Agrawal,
"Control of an agricultural vehicle: Simulations and Experiments,"
submitted to Applied Engineering in Agriculture.
Roger Bostelman, Ji-Chul Ryu, Tommy Chang, Joshua Johnson, and Sunil K. Agrawal,
"An Advanced Patient Lift and Transfer Device for the Home,"
submitted to ASME Transactions, Journal of Medical Devices.
Sunil K. Agrawal and Ji-Chul Ryu,
"Integrated Planning and Control of a Car-like Mobile Robot with Slip Using Differential Flatness,"
submitted to Autonomous Robots.
Ji-Chul Ryu and Sunil K. Agrawal,
"Differential Flatness-based Robust Control of Mobile Robots in the Presence of Slip,"
submitted to The International Journal of Robotics Research.
REFEREED CONFERENCE PAPERS
Ji-Chul Ryu and Sunil K. Agrawal,
"Differential Flatness-based Robust Control of a Two-wheeled Mobile Robot in the Presence of Slip,"
Proc. ASME Dynamic Systems and Control Conference (DSCC), DSCC2008-2228, 2008.
Chinpei Tang, Patrick T. Miller, Venkat N. Krovi, Ji-Chul Ryu, and Sunil K. Agrawal,
"Kinematic Control of a Nonholonomic Wheeled Mobile Manipulator with a Differential Flatness Approach,"
Proc. ASME Dynamic Systems and Control Conference (DSCC), DSCC2008-2253, 2008.
Ji-Chul Ryu, Vivek Sangwan, and Sunil K. Agrawal,
"Differentially Flat Designs of Mobile Vehicles with Under-actuated Manipulator Arms,"
Proc. ASME International Mechanical Engineering Congress and Exposition (IMECE), IMECE2007-43526, 2007.
Ji-Chul Ryu, Sunil K. Agrawal, and Jaume Franch,
"Motion Planning and Control of a Tractor with a Steerable Trailer Using Differential Flatness,"
Proc. ASME International Design Engineering Technical Conference (IDETC), DETC2007-35288, 2007.
MSC Simulation Software Award paper.
Roger Bostelman, James Albus, Tommy Chang, Tsai Hong, Sunil K. Agrawal and Ji-Chul Ryu,
"DynaHLPR Chair: A Novel Indoor Mobility-Assist and Lift System,"
Proc. ASME International Design Engineering Technical Conference (IDETC), DETC2007-35295, 2007.
Ji-Chul Ryu, Kaustubh Pathak, and Sunil K. Agrawal,
"Control of a Passive Mobility Assistive Robot,"
Proc. ASME International Mechanical Engineering Congress and Exposition (IMECE), IMECE2006-14701, 2006.
Sunil K. Agrawal and Ji-Chul Ryu,
"Design of Dissipative and Stable Assist Robots,"
Proc. ASME International Design Engineering Technical Conference (IDETC), DETC06-99734, 2006.
So-Ryeok Oh, Ji-Chul Ryu, Sunil K. Agrawal,
"Dynamics and Control of Helicopters with a Six-Cables Suspended Robot,"
Proc. ASME International Design Engineering Technical Conference (IDETC), DETC2005-85131, 2005.
Ji-Chul Ryu, Tae-Goo Kang, and Young-Ho Cho,
"A New Transverse Electromagnetic Microactuator using the Radial Magnetic Field Guided by Symmetric Twin Magnets,"
Proc. ASME International Mechanical Engineering Congress and Exposition (IMECE), pp.105-109, 1999.
Ji-Chul Ryu, Tae-Goo Kang, and Young-Ho Cho,
"Electromagnetic Microactuators with the Electroplated Planar Coils Driven by Radial Magnetic Field,"
Proc. The 1st Korean MEMS Conference, pp.29-36, 1999.
(Under Review)
Ji-Chul Ryu and Sunil K. Agrawal,
"Differentially Flat Mobile Manipulators Mounted with an Under-actuated Vertical Arm,"
submitted to 2010 IEEE International Conference on Robotics and Automation (ICRA).
OTHER PRESENATIONS AND POSTERS
Amy Lynch, Ji-Chul Ryu, Sunil K. Agrawal, and James C. (Cole) Galloway,
"Power Mobility Training for a 7-month-old Infant with Spina Bifida,"
Poster at the PT 2009: Annual Conference & Exhibition of the American Physical Therapy Association (APTA), 2009.
Xi Chen, Amy Lynch, Ji-Chul Ryu, Sunil K. Agrawal, and James C. (Cole) Galloway,
"Effect of Force Field Joystick to Enhance Early Mobility in Infants,"
Poster at the 5th Annual Center for Biomedical Engineering Research Day, University of Delaware, 2008.
Jay Katupitiya (Presenter), Ray Eaton, Ji-Chul Ryu, and Sunil K Agrawal,
"A streamlined Approach to Future Autonomous Farming,"
In the Half-Day Workshop on Towards Autonomous Agriculture of Tomorrow at the IEEE International Conference on Robotics and Automation (ICRA), 2008.
James C. (Cole) Galloway, Ji-Chul Ryu (Presenter), and Sunil K. Agrawal,
"First Generation of Mobility Devices in Special Needs Infants,"
Presentation at the 4th Annual Center for Biomedical Engineering Research Day, University of Delaware, 2007.
Ji-Chul Ryu and Sunil K Agrawal (Presenter),
"Differential Flatness Based Planning and Control of Classes of Mobile Vehicles,"
In the Full-Day Workshop on Collision-free Motion Planning for Dynamic Systems at the IEEE International Conference on Robotics and Automation (ICRA), 2007.