Optimization-based control for dynamic legged robots

PM Wensing, M Posa, Y Hu, A Escande… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
In a world designed for legs, quadrupeds, bipeds, and humanoids have the opportunity to
impact emerging robotics applications from logistics, to agriculture, to home assistance. The …

Dynamic and versatile humanoid walking via embedding 3d actuated slip model with hybrid lip based stepping

X Xiong, AD Ames - IEEE Robotics and Automation Letters, 2020 - ieeexplore.ieee.org
In this letter, we propose an efficient approach to generate dynamic and versatile humanoid
walking with non-constant center of mass (COM) height. We exploit the benefits of using …

Slip walking over rough terrain via h-lip stepping and backstepping-barrier function inspired quadratic program

X Xiong, A Ames - IEEE Robotics and Automation Letters, 2021 - ieeexplore.ieee.org
We present an advanced and novel control method to enable actuated Spring Loaded
Inverted Pendulum model to walk over rough and challenging terrains. The high-level …

Bipedal walking on constrained footholds: Momentum regulation via vertical com control

M Dai, X Xiong, A Ames - 2022 International Conference on …, 2022 - ieeexplore.ieee.org
This paper presents an online walking synthesis methodology to enable dynamic and stable
walking on constrained footholds for underactuated bipedal robots. Our approach modulates …

Orbit characterization, stabilization and composition on 3d underactuated bipedal walking via hybrid passive linear inverted pendulum model

X Xiong, AD Ames - … on Intelligent Robots and Systems (IROS), 2019 - ieeexplore.ieee.org
A Hybrid passive Linear Inverted Pendulum (H-LIP) model is proposed for characterizing,
stabilizing and composing periodic orbits for 3D underactuated bipedal walking. Specifically …

An analysis of the rolling dynamics of a hexapod robot using a three-dimensional rolling template

IC Chang, CH Hsu, HS Wu, PC Lin - Nonlinear Dynamics, 2022 - Springer
Multi-legged robots are analyzed and controlled based on a reduced-order single-legged
planar model. However, the rolling motion is ignored in the discussion of the planar model …

From human walking to bipedal robot locomotion: Reflex inspired compensation on planned and unplanned downsteps

J Verhagen, X Xiong, AD Ames… - 2022 IEEE/RSJ …, 2022 - ieeexplore.ieee.org
Humans are able to negotiate downstep behaviors-both planned and unplanned-with
remarkable agility and ease. The goal of this paper is to systematically study the translation …

Online Running Pattern Generation for Humanoid Robot With Direct Collocation of Reference-Tracking Dynamics

H Chen, X Chen, C Dong, Z Yu… - … /ASME Transactions on …, 2023 - ieeexplore.ieee.org
To generate dynamically feasible running motion for humanoid robots, one conventionally
chooses between a simplified model and a full-body model. A simplified model can be …

An Energy-Based Framework for Robust Dynamic Bipedal Walking Over Compliant Terrain

C Karakasis, I Poulakakis… - Journal of …, 2024 - asmedigitalcollection.asme.org
Bipedal locomotion over compliant terrain is an important and largely underexplored
problem in the robotics community. Although robot walking has been achieved on some non …

Optimal control of piecewise-smooth control systems via singular perturbations

T Westenbroek, X Xiong, AD Ames… - 2019 IEEE 58th …, 2019 - ieeexplore.ieee.org
This paper investigates optimal control problems formulated over a class of piecewise-
smooth controlled vector fields. Rather than optimizing over the discontinuous system …