BiConMP: A Nonlinear Model Predictive Control Framework for Whole Body Motion Planning

Avadesh Meduri, Paarth Shah, Julian Viereck, Majid Khadiv, Ioannis Havoutis, Ludovic Righetti

Research output: Contribution to journalArticlepeer-review

Abstract

Online planning of whole-body motions for legged robots is challenging due to the inherent nonlinearity in the robot dynamics. In this work, we propose a nonlinear model predictive control (MPC) framework, the BiConMP which can generate whole body trajectories online by efficiently exploiting the structure of the robot dynamics. BiConMP is used to generate various cyclic gaits on a real quadruped robot and its performance is evaluated on different terrain, countering unforeseen pushes, and transitioning online between different gaits. Furthermore, the ability of BiConMP to generate nontrivial acyclic whole-body dynamic motions on the robot is presented. The same approach is also used to generate various dynamic motions in MPC on a humanoid robot (Talos) and another quadruped robot (AnYmal) in simulation. Finally, an extensive empirical analysis on the effects of planning horizon and frequency on the nonlinear MPC framework is reported and discussed.

Original languageEnglish (US)
Pages (from-to)905-922
Number of pages18
JournalIEEE Transactions on Robotics
Volume39
Issue number2
DOIs
StatePublished - Apr 1 2023

Keywords

  • Humanoid robots
  • legged locomotion
  • quadrupedal robotics
  • robot control
  • robot motion

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Science Applications

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