Sejong | Biomechatronics Laboratory

Publications

Journals

1. HS Choi, SJ Lee, & H In. (2024) Development and Clinical Validation of Passive Shoulder Exoskeleton with Novel Gravity Compensation Mechanism for Stabilizing Arm Tremor of Surgeons during Minimally Invasive Surgery. Frontiers in Bioengineering and Biotechnology, 12, 1418148.[link]

2. HS Choi, S Yoon, J Kim, H Seo, & JK Choi. (2024) Calibrating Low-Cost Smart Insole Sensors with Recurrent Neural Networks for Accurate Prediction of Center of Pressure. Sensors, 24(15), 4765.[link]

3. HS Choi, YS Baek, & H In. (2022) Ankle strategy assistance to improve gait stability using controllers based on in-shoe center of pressure in 2 degree-of-freedom powered ankle-foot orthoses: A clinical study. Journal of NeuroEngineering and Rehabilitation, 19:114.[link]

4. HS Choi & H In. (2022) The effects of operating height and the passage of time on the end-point performance of fine manipulative tasks that require high accuracy. Frontiers in Physiology, 13.[link]

5. JI Han, J Lee, HS Choi, J Kim, & J Choi. (2022) Policy Design for an Ankle-Foot Orthosis Using Simulated Physical Human-Robot Interaction via Deep Reinforcement Learning. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 30, 2186-97.[link]

6. HS Choi & YS Baek. (2020) Effects of the degree of freedom and assistance characteristics of powered ankle-foot orthoses on gait stability. PLoS ONE, 15, e0242000.[link]

7. HS Choi, CH Lee, & YS Baek. (2020) Design and Validation of a Two-Degree-of-Freedom Powered Ankle-Foot Orthosis with Two Pneumatic Artificial Muscles. Mechatronics, 72, 102469.[link]

8. JI Han, HS Choi, & YS Baek. (2020) Simulation of a Lower Extremity Assistive Device for Resistance Training in a Microgravity Environment. Applied Sciences, 10, 1160.[link]

9. M Shim, JI Han, HS Choi, SM Ha, J Kim, & YS Baek. (2019) Terrain Feature Estimation Method for a Lower Limb Exoskeleton Using Kinematic Analysis and Center of Pressure. Sensors, 19, 4418.[link]

10. HS Choi, CH Lee, M Shim, JI Han, & YS Baek. (2018) Design of an Artificial Neural Network Algorithm for a Low-Cost Insole Sensor to Estimate the Ground Reaction Force (GRF) and Calibrate the Center of Pressure (CoP). Sensors, 18, 4349.[link]

Peer-reviewed Proceedings

1. K Kang, S Jung, M Lim, & HS Choi. (2025) Development and Pre-Clinical Validation of Tendon Driven 2 Degree-of-Freedom Powered Ankle-Foot Orthosis for Heuristic Algorithm Based on Gait Stability. In proceedings of 2025 International Conference On Rehabilitation Robotics (ICORR), Chicago, USA.

2. J Park, HS Choi, & H In. (2023) Analysis of Lower Extremity Shape Characteristics in Various Walking situations for the Development of Wearable Robot. In proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems, Detroit, USA.

3. HS Choi, CH Lee, & YS Baek. (2019) Design of a Pneumatic Actuated Ankle-Foot Orthosis which has Talocrural and Subtalar Joint. In proceedings of IEEE 16th International Conference on Rehabilitation Robotics, Toronto, Canada.

4. HS Choi, CH Lee, & YS Baek. (2018) Estimating GRF(Ground Reaction Force) and Calibrating CoP(Center of Pressure) of an Insole Measured by a Low-Cost Sensor with Neural Network. In proceedings of IEEE 18th International Conference on Bioinformatics and Bioengineering, Taichung, Taiwan.

5. RH Kang, HS Choi, & YS Baek. (2018) Design of a Portable Radial Piston Pneumatic Compressor for Wearable Robot System. In proceedings of IEEE 18th International Conference on Bioinformatics and Bioengineering, Taichung, Taiwan. 

Grants

1. LIG Nex1, Industry-Commissioned Academic Research Project, PI, 2025-2027, Development of a Reinforcement Learning Algorithm for Gait Assistance using a Soft Wearable Robot. $77,000.

2. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2025. Modeling of Flexible Sensor-Based Multi-layer Insole for Gait Indicator Extraction. $6,220.

3. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2025. Development of Mass Balancer for Controlling the Wearer's Center of Mass. $6,220.

4. National Research Foundation of Korea (NRF), Mid-career Research Program, PI, 2024-2027. Development of the FlexiRig Ankle Exoskeleton and a Heuristic Algorithm for Ankle Strategy Assistance to Stabilize Gait. $134,000.

5. Institute of Information & Communications Technology Planning & Evaluation (IITP), ICT Challenge and Advanced Network of HRD, Investigator, 2024-2028. Development and Operation of AI Robot Research and Education Program. $800,000.

6. Institute of Information & Communications Technology Planning & Evaluation (IITP), National Center of Excellence in Software, Investigator, 2024-2028. $9,476,000.

7. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2024. Development of Tremor Reduction Device through 3D Elastic Structure Design of Serial Links. $6,220.

8. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2024. Improvement of Prediction Performance of Center of Pressure in Insole Sensor using Acceleration Data of Wearable Watches. $6,220.

9. National Research Foundation of Korea (NRF), Broadening Opportunities Grants – General Grants, PI, 2023-2024. Development of powered ankle-foot orthosis controller based on evolutionary strategy for stabilizing gait. $53,000.

10. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2023. Development of gait index measurement device using principle of retractable tape measure. $6,220.

11. Incheon Academy of Science and Arts, STEAM-Activity, PI, 2023. Clinical research to optimize the location of wearable sensor for gait stability evaluation. $6,220.

Dissertations

1. HS Choi. (2021). Developing Stable Assistance with Design and Control of 2 Degree-of-freedom Powered Ankle-Foot Orthosis [Doctoral Disseration, Yonsei University, Seoul, Korea].[pdf]