Seunghwan Um 엄승환 / 嚴勝煥 /

Hi there! I'm a PhD student at Robotics Innovatory, Sungkyunkwan University, South Korea, under the supervision of Prof. Hyouk Ryeol Choi

My research focuses on contact-rich robotic manipulation, connecting physically intelligent gripper design, compliant control, and robot learning.
My recent work explores force-feedback teleoperation, imitation and reinforcement learning for robotic hands, and improving manipulation policies through human corrections.

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Seunghwan Um (엄승환 / rush / r-ush), PhD student at SKKU Robotics Innovatory

▶ Research

PALM-Gripper by Seunghwan Um (rush, 엄승환): parallel adaptable palm mechanism for shelf picking in logistics, IEEE TMECH 2026
PALM-Gripper: Integrated Gripper with Parallel AdaptabLe Mechanism for Shelf Picking in Logistics
Seunghwan Um, Yeong Gwang Son, Juyong Hong, Chun Soo Kim, Issac Rhee, Heeyeon Jeong, Hyouk Ryeol Choi*
IEEE Transactions on Mechatronics (TMECH), 2026, Recently published
Paper

"Parallelly adaptable palm mechanism" for complementing the suction gripper's compliance.
This work was awarded the Bronze Prize at the 2025 Samsung Humantech Paper Award.

Toward Reliable Bin-Picking by Seunghwan Um (rush, 엄승환): collision-aware robotic design for heavily cluttered environments, IEEE RA-P 2026
Toward Reliable Bin-Picking: Collision-Aware Robotic Design and Control Strategy for Heavily Cluttered Environment
Seunghwan Um, Yeong Gwang Son, Jaeyun Sim, Hyouk Ryeol Choi*
IEEE Robotics and Automation Practice (RA-P), 2026, Recently published
Paper

To address the limitations of single-modality grasping in complex environments, we present a robust network and compliance control validated for industrial applicability at the ICRA 2024 RGMC.
This work achieved 2nd place at the 9th RGMC 2024 and was invited to publish in the RA-P Special Collection on "Autonomous Robotic Grasping and Manipulation in Real-World Applications".

Plug-and-Play shape matching module for zero-shot mesh-free grasp refinement by Seunghwan Um (rush), IEEE RA-L presented at ICRA 2026
Plug-and-Play Shape Matching Module for Zero-Shot Mesh-Free Grasp Refinement on Unknown Objects
Juyong Hong, Yeong Gwang Son, Seunghwan Um, Hyouk Ryeol Choi*
IEEE Robotics and Automation Letters (RA-L), Presented at ICRA 2026
Paper

Training-free, plug-and-play module that enhances existing grasp planners for unknown objects.
It reorganizes the grasp candidates based on an object's centroid from a single RGB-D image.

Overcoming Heavy Clutter: hybrid grasping network and gripper by Seunghwan Um (rush, 엄승환), IROS 2024 Workshop Best Extended Abstract
Overcoming Heavy Clutter: Utilizing the Hybrid Grasping Network and Gripper
Seunghwan Um, Yeong Gwang Son, Tat Hieu Bui, Ho Sang Jung, Hyouk Ryeol Choi*
IROS 2024 Workshop: Benchmarking via Competitions in Robotic Grasping and Manipulation
★Best Extended Abstract
Paper / Workshop page / Video

A robotic bin-picking system evaluated in the 9th Robotic Grasping and Manipulation Competition (RGMC) at ICRA 2024.

Adaptive gripper with Grasshopper mechanism by Seunghwan Um (rush): enhanced power grasp range and linearity, IEEE Access 2024
Development of Adaptive Gripper Enhancing Power Grasp Range and Linearity
Issac Rhee, Chun Soo Kim, Heeyeon Jeong, Seung Jae Moon, Seunghwan Um, Yeong Gwang Son, Yong Bum Kim, Ho Sang Jung, Hyouk Ryeol Choi*
IEEE Access, 2024
Paper

Gripper design that applies a Grasshopper mechanism to improve fingertip movement. It also allows the fingertips to move towards the palm of the gripper after grasping an object, thereby expanding the range of object sizes that can be adaptively grasped.

ReC-Gripper by Seunghwan Um (rush, 엄승환): reconfigurable combined suction and fingered gripper for logistics picking and stowing, IEEE RA-L ICRA 2024
ReC-Gripper: A Reconfigurable Combined Suction and Fingered Gripper for Various Logistics Picking and Stowing Tasks
Seunghwan Um, Heeyeon Jeong, Chun Soo Kim, Issac Rhee, Hyouk Ryeol Choi*
IEEE Robotics and Automation Letters (RA-L), Presented at ICRA 2024
Paper

Reconfigurable gripper that handles objects in both bin and shelf environments.
Its performance was validated in shelf experiments and in a competition-style bin environment.

▶ Award

Handling Hand closed into a power grasp — low-cost modular 16-DoF robotic hand, Seunghwan Um (rush, 엄승환), KSME 2026
Handling Hand open palm — low-cost modular 16-DoF robotic hand, Seunghwan Um (rush), KSME 2026
🏅 Prize Winner in the Competition
Jeonghwan Park, Taehwan Yoon, Seunghwan Um, Hyouk Ryeol Choi*
The Korean Society of Mechanical Engineers (KSME), 2026, Final ranking to be announced
Page / Competition page

Awarded for Handling Hand, a low-cost modular 16-DoF robotic hand with servos rearranged inside the fingers.

RED Show 1st place team photo at KRoC 2026 — Seunghwan Um (rush, 엄승환)
Robot Engineering and Design Show (RED Show) 1st Place at KRoC 2026 — Seunghwan Um (rush)
🥇 1st Place in the Competition
Chemin Ahn, Seunghwan Um, Jeonghwan Park, Sung Jun Lee, Hyouk Ryeol Choi*
Robot Engineering & Design Show (RED Show) at KRoC, 2026
News / KRoC 2026 / RED Show (Kor)

Awarded for "Force Feedback Leader Arm for High Quality Demo Data using F/T Sensor", developed in the Teleoperating Leader Arm for Dual Arm project.

Samsung Humantech Paper Award 2025 Bronze Prize team photo — Seunghwan Um (rush, 엄승환), PALM-Gripper
Samsung Humantech Paper Award 2025 Bronze Prize — Seunghwan Um (rush)
🥉 Bronze Prize of Samsung Humantech
Seunghwan Um, Yeong Gwang Son, Juyong Hong, Chun Soo Kim, Hyouk Ryeol Choi*
Samsung Electronics Co., Ltd., 2025
News / Humantech site

Awarded for PALM-Gripper, a parallelly adaptable palm mechanism integrated gripper for shelf picking in logistics.

RGMC 2024 2nd place team at ICRA 2024 — Seunghwan Um (rush, 엄승환) with ReC-Gripper
9th Robotic Grasping and Manipulation Competition (RGMC) at ICRA 2024 — 2nd Place, Seunghwan Um (rush)
🥈 2nd Place in the Competition
Yeong Gwang Son, Seunghwan Um, Juyong Hong, Chun Soo Kim, Hyouk Ryeol Choi*
9th Robotic Grasping and Manipulation Competition (RGMC) at ICRA, 2024
News / Competition page

Competed in the 9th Robotic Grasping and Manipulation Competition (RGMC) at ICRA 2024
with ReC-Gripper and an extended CoAS-Net.

Wall Climbing Car (WCC) undergraduate project
🏆 Best Prize in the Contest
3D Design for the Future, Ministry of Trade, Industry and Energy (MOTIE), 2023
🥉 Bronze Prize in the Competition
The Korean Society of Mechanical Engineers (KSME), 2021
🏵️ Encouragement Prize in the Contest
Creative and Intelligent Robot Contest (CIRO), 2021
[1st Team] Seunghwan Um, Hyungjin Park, Jaehyeon Nam, Boseok Kim, Yohan Ahn, Minsu Kong, Changho Lee, Hyunju Kwak, Joonmyung Choi*
[2nd Team] Boseok Hong, Youngsu Jeong, Euichan Kim

Team leader of Wall Climbing Car (WCC) [Undergraduate Project]
Disney Research's VertiGo looked like so much fun at the time that we tried building our own version at an undergraduate level.

▶ Personal Project

Robotic insertion showing the force-constrained base action, additional residual action, and insertion resistance
Learning from Human Corrections
Seunghwan Um, Hyouk Ryeol Choi*
Page / Website repository

Human-guided residual learning for contact-rich box insertion. A frozen base policy is corrected at the Original position and an unseen backward target shift of 3 cm.

Scooping grasping motion with robotic hand using fingertip force sensing
Scooping Grasping with Robotic Hand
Seunghwan Um, Tae Hyun Bae, Hyouk Ryeol Choi*
IL Page / RL Page / Website repository

Imitation and reinforcement learning for scooping grasps with a robotic hand, using fingertip force feedback to compensate for low mechanical stiffness.

Impedance control demonstration with Doosan M0609 robot arm
Impedance Control with M0609
Seunghwan Um, Tae Hyun Bae
Page / Website repository

Impedance control on a Doosan M0609 arm for stable contact during teleoperation and constrained tasks such as pivoting.

Admittance control with Rainbow Robotics RB10 collaborative robot
Admittance Control with RB10
Seunghwan Um, Jaeyun Sim
Page / Website repository

Admittance control on a Rainbow Robotics RB10 arm for pushing and grasping objects in clutter.

Force feedback teleoperating leader arm for dual arm robot system
Teleoperating Leader Arm for Dual Arm
Seunghwan Um, Chemin Ahn, Jeonghwan Park, Sung Jun Lee, Hyouk Ryeol Choi*
Page / Website repository / Video

Bilateral teleoperation of a dual-arm robot and robotic hands with gravity-compensated leader arms and force feedback.
This work achieved 1st place at the RED Show, KRoC 2026.


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