An actuator with mechanically adjustable series compliance

Physically Variable Compliance in Running

This paper explores the role and utility of variable compliance in running behaviors. While it is well understood in the literature that leg compliance plays an important role in running locomotion, our conjecture is that mechanically adjustable leg compliance improves the efficiency and robustness of a running system. We claim that variable compliance can serve as an effective means for gait r...

MACCEPA: the Mechanically Adjustable Compliance and Controllable Equilibrium Position Actuator used in the ‘Controlled Passive Walking’ biped Veronica

In this paper a novel rotational actuator with adaptable compliance is presented. First the importance of adaptable compliance for bipedal walking is explained, and then a number of comparable designs are given with their possible drawbacks. The MACCEPA concept and design is described in detail. The formula to calculate the generated torque is derived. It is shown, depending on the design param...

Compliant Actuation for Biologically Inspired Bipedal Walking Robots

This thesis deals with compliant actuators and their use in energy efficient walking bipeds. Two types of actuators with adaptable compliance are discussed: PPAM (Pleated Pneumatic Artificial Muscles) and MACCEPA (Mechanically Adjustable Compliance and Controllable Equilibrium Position Actuator). The PPAM is a design made to overcome shortcomings associated with the existing types of pneumatic ...

Mechanically stiffness-adjustable actuator using a leaf spring for safe physical human-robot interaction

Electric-Pneumatic Actuator: A New Muscle for Locomotion

A better understanding of how actuator design supports locomotor function may help develop novel and more functional powered assistive devices or robotic legged systems. Legged robots comprise passive parts (e.g., segments, joints and connections) which are moved in a coordinated manner by actuators. In this study, we propose a novel concept of a hybrid electric-pneumatic actuator (EPA) as an e...