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Randall T. Fawcett

5 accepted papers

2024

Predictive Control With Indirect Adaptive Laws for Payload Transportation by Quadrupedal Robots

RA-L 2024

This letter formally develops a novel hierarchical planning and control framework for robust payload transportation by quadrupedal robots, integrating a model predictive control (MPC) algorithm with a gradient-descent-based adaptive updating law. At the framework's high level, an indirect adaptive l

Cited by 13SourceScholar
2023

Distributed Data-Driven Predictive Control for Multi-Agent Collaborative Legged Locomotion

ICRA 2023poster

The aim of this work is to define a planner that enables robust legged locomotion for complex multi-agent systems consisting of several holonomically constrained quadrupeds. To this end, we employ a methodology based on behavioral systems theory to model the sophisticated and high-dimensional struct…

Cited by 23SourceScholar
2022

Robust Predictive Control for Quadrupedal Locomotion: Learning to Close the Gap Between Reduced- and Full-Order Models

RA-L 2022

Template-based reduced-order models have provided a popular methodology for real-time trajectory planning of dynamic quadrupedal locomotion. However, the abstraction and unmodeled dynamics in template models significantly increase the gap between reduced- and full-order models. This letter presents

Cited by 44SourceScholar
2022

Toward a Data-Driven Template Model for Quadrupedal Locomotion

RA-L 2022

This work investigates a data-driven template model for trajectory planning of dynamic quadrupedal robots. Many state-of-the-art approaches involve using a reduced-order model, primarily due to computational tractability. The spirit of the trajectory planning approach in this work draws on recent ad

Cited by 29SourceScholar
2020

Exponentially Stabilizing and Time-Varying Virtual Constraint Controllers for Dynamic Quadrupedal Bounding

IROS 2020poster

This paper aims to develop time-varying virtual constraint controllers that allow stable and agile bounding gaits for full-order hybrid dynamical models of quadrupedal locomotion. As opposed to state-based nonlinear controllers, time-varying controllers can initiate locomotion from zero velocity. Mo…

Cited by 3SourceScholar