Manufacture and deformation angle control of a two-direction soft actuator integrated with SMAs
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
In this contribution, the development of a 3D-printed soft actuator integrated with shape memory alloys (SMA) wires capable of bending in two directions is presented. This work discusses the design, manufacturing, modeling, simulation, and feedback control of the actuator. The SMA wires are encased in Polytetrafluoroethylene (PTFE) tubes and then integrated into the 3D-printed matrix made of thermoplastic polyurethane (TPU). To measure and control the deformation angle of the soft actuator, a computer vision system was implemented. Based on the experimental results, a mathematical model was developed using the system identification method and simulated to describe the dynamics of the actuator, contributing to the design of a controller. However, achieving precise control of the deformation angle in systems actuated by SMA wires is challenging due to their inherent nonlinearities and hysteretic behavior. A proportional-integral (PI) controller was designed to address this challenge, and its effectiveness was validated through real experiments.
Details
Original language | English |
---|---|
Article number | 758 |
Number of pages | 12 |
Journal | Materials |
Volume | 17 |
Issue number | 3 |
Publication status | Published - 5 Feb 2024 |
Peer-reviewed | Yes |
External IDs
Scopus | 85184709985 |
---|---|
ORCID | /0000-0003-2834-8933/work/153654205 |
ORCID | /0000-0002-8854-7726/work/153654440 |
ORCID | /0000-0002-3347-0864/work/153655345 |
WOS | 001160513200001 |
ORCID | /0000-0002-2108-1095/work/155163862 |
Keywords
Keywords
- shape memory alloys, soft actuator, 3D printed soft structures, thermoplastic polyurethane, system identification, PI controller, closed-loop control