Bending Motion Control of Electroactive Polymer Actuator-Sensor Hybrid Structure for Finger Exoskeleton

다국어 초록 (Multilingual Abstract)

This study was conducted in order to develop a finger exoskeleton system using ionic polymer metal composites (IPMCs) as the actuator and sensor in a hybrid structure. To use the IPMC as an actuator producing large force, a first order transfer function was obtained using results from a block force for DC excitation that applied to two IPMCs of 20mm-width, 50mm-length, and 2.4mm thickness together. After which the validation of 200gf control with anti-windup PI controller was confirmed. A 5mm-width, 50mm-length, 0.6mm-thickness of IPMC was also modeled as a sensor for tip displacement. As a result, the IPMC sensor could been utilized as a trigger role for the actuator. Finally, an IPMC sensor and actuator were installed on the joint of a single DOF exoskeleton in the hybrid structure, and test for the control of 40gf of block force and predefined sequence of motion was performed.

참고문헌 (Reference)

1 전진한, "이온성 고분자-금속 복합체 작동기의 소개 및 이의 응용" 한국정밀공학회 28 (28): 1242-1250, 2011

2 Markaroglu, H., "Tracking Time Adjustment in Back Calculation Anti-Windup Scheme" 2006

3 Nam, D, "Smart Actuation and Sensing Systems - Recent Advances and Future Challenges" InTech 2012

4 Bhat, N., "Precision Force and Position Control of Ionic Polymer-Metal Composite" 218 (218): 421-432, 2004

5 Dollar, A. M., "Lower Extremity Exoskeletons and Active Orthoses : Challenges and State-of-the-Art" 24 (24): 144-158, 2008

6 Shahinpoor, M., "Ionic Polymer-Metal Composites: I. Fundamentals" 10 (10): 2001

7 Park, K., "IPMC Based Biosensor for the Detection of Biceps Brachii Muscle Movements" 8 : 4098-4109, 2013

8 Lo, H. S, "Exoskeleton Robots for Upper-Limb Rehabilitation: State of the Art and Future Prospects" 34 (34): 261-268, 2012

9 Bahramzadeh, Y., "Dynamic Curvature Sensing Employing Ionic-Polymer–Metal Composite Sensors" 20 (20): 2011

10 Richardson, R. C., "Control of Ionic Polymer Metal Composites" 8 (8): 245-253, 2003

11 Aw, K., "An IPMC Actuated Robotic Surgery End Effector with Force Sensing" 4 (4): 246-256, 2013

12 Hao, L., "A Novel Adaptive Force Control Method for IPMC Manipulation" 21 (21): 2012