Goals
The goal of this project was to develop a safe, affordable, and fully sensorised elastic actuator suitable for prosthetic and orthotic devices. A key objective was to make compliant actuation accessible to students, researchers, and practitioners through an open-source hardware and software framework.
Scope
Research and development project conducted within an academic research group, resulting in a peer-reviewed HardwareX publication. The work covers mechanical design, electronics, control architecture, and experimental validation, with emphasis on reproducibility, modularity, and low-cost fabrication using 3D printing.
Implementation
The actuator is based on a series elastic actuator (SEA) architecture using a belt-driven DC motor, radial springs, dual encoders, load cells, and inertial sensing. Control software is implemented in embedded C++ on low-cost microcontrollers and supports both impedance and admittance control. The complete system—including CAD files, schematics, firmware, and documentation—is released under an open-source license.
What I Learned
This project provided extensive experience in designing compliant robotic actuators for safe physical interaction. I gained deep insight into elastic actuator modelling, impedance and admittance control, sensor fusion, and real-time embedded programming. The work also strengthened my skills in research-driven development, experimental validation, and producing reproducible open-source hardware.
