Model predictive control applied to different time-scale dynamics of flexible joint robots

M Iskandar, C van Ommeren, X Wu… - IEEE Robotics and …, 2022 - ieeexplore.ieee.org
Modern Lightweight robots are constructed to be collaborative, which often results in a low
structural stiffness compared to conventional rigid robots. Therefore, the controller must be …

Extending a dynamic friction model with nonlinear viscous and thermal dependency for a motor and harmonic drive gear

S Wolf, M Iskandar - 2018 IEEE International Conference on …, 2018 - ieeexplore.ieee.org
In robotic actuation a well identified and modeled friction behavior of the actuator
components helps to significantly improve friction compensation, output torque estimation …

An efficient leg with series–parallel and biarticular compliant actuation: design optimization, modeling, and control of the eLeg

W Roozing, Z Ren… - The International Journal …, 2021 - journals.sagepub.com
We present the development, modeling, and control of a three-degree-of-freedom
compliantly actuated leg called the eLeg, which employs both series-and parallel-elastic …

Using nonlinear normal modes for execution of efficient cyclic motions in articulated soft robots

C Della Santina, D Lakatos, A Bicchi… - … Robotics: The 17th …, 2021 - Springer
Thanks to their body elasticity, articulated soft robots promise to produce effective and robust
oscillations with low energy consumption. This in turn is an important feature which can be …

Passivity-based control of underactuated biped robots within hybrid zero dynamics approach

H Sadeghian, C Ott, G Garofalo… - 2017 IEEE International …, 2017 - ieeexplore.ieee.org
The concept of hybrid zero dynamics is a promising approach for designing exponentially
stabilizing controllers for dynamic walking with some degrees of underactuation. By this …

Mechanical design of a biped robot FORREST and an extended capture-point-based walking pattern generator

H Zhu, U Thomas - Robotics, 2023 - mdpi.com
In recent years, many studies have shown that soft robots with elastic actuators enable
robust interaction with the environment. Compliant joints can protect mechanical systems …

Distributed torque estimation toward low-latency variable stiffness control for gear-driven torque sensorless humanoid

Y Nagamatsu, T Shirai, H Suzuki… - 2017 IEEE/RSJ …, 2017 - ieeexplore.ieee.org
This paper explains low-latency joint torque feedback control based on torque estimation on
each joint for gear-driven humanoid robots with harmonic drives. Force control of gear …

Design of a novel 3-dof leg with series and parallel compliant actuation for energy efficient articulated robots

W Roozing, Z Ren… - 2018 IEEE International …, 2018 - ieeexplore.ieee.org
This work presents the development of a 3-DoF leg with series and parallel compliant
actuation. Series-elastic main actuators are combined with parallel high efficiency energy …

Scaling our world view: how monoamines can put context into brain circuitry

P Stratmann, A Albu-Schäffer, H Jörntell - Frontiers in cellular …, 2018 - frontiersin.org
Monoamines are presumed to be diffuse metabotropic neuromodulators of the
topographically and temporally precise ionotropic circuitry which dominates CNS functions …

Generation of locomotion trajectories for series elastic and viscoelastic bipedal robots

A Werner, W Turlej, C Ott - 2017 IEEE/RSJ International …, 2017 - ieeexplore.ieee.org
Series-elastic and viscoelastic robots can provide performance gains in applications with
high dynamics. Harnessing these, requires an understanding of the dynamics of the system …