An adaptive finite-time force-sensorless tracking control scheme for pneumatic muscle actuators by an optimal force estimation

CP Vo, KK Ahn - IEEE Robotics and Automation Letters, 2021 - ieeexplore.ieee.org
The prime challenges of the force control generated by pneumatic muscle actuators (PMAs)
have arisen from their highly nonlinear properties, which are perturbed by dynamic …

[HTML][HTML] A compact adjustable stiffness rotary actuator based on linear springs: working principle, design, and experimental verification

CP Vo, VD Phan, TH Nguyen, KK Ahn - Actuators, 2020 - mdpi.com
Inspired by improving the adaptive capability of the robot to external impacts or shocks, the
adjustable stiffness behavior in joints is investigated to ensure conformity with the safety …