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Concept

Quadrupedalism

Related publications (16)

Puppeteer and Marionette: Learning Anticipatory Quadrupedal Locomotion Based on Interactions of a Central Pattern Generator and Supraspinal Drive

Auke Ijspeert, Guillaume Denis Antoine Bellegarda, Milad Shafiee Ashtiani

Quadruped animal locomotion emerges from the interactions between the spinal central pattern generator (CPG), sensory feedback, and supraspinal drive signals from the brain. Computational models of CPGs have been widely used for investigating the spinal co ...

IEEE2023

CPG-RL: Learning Central Pattern Generators for Quadruped Locomotion

Auke Ijspeert, Guillaume Denis Antoine Bellegarda

In this letter, we present a method for integrating central pattern generators (CPGs), i.e. systems of coupled oscillators, into the deep reinforcement learning (DRL) framework to produce robust and omnidirectional quadruped locomotion. The agent learns to ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Sprawling Quadruped Robot Driven by Decentralized Control With Cross-Coupled Sensory Feedback Between Legs and Trunk

Auke Ijspeert

Quadruped animals achieve agile and highly adaptive locomotion owing to the coordination between their legs and other body parts, such as the trunk, head, and tail, that is, body-limb coordination. This study aims to understand the sensorimotor control und ...

2021

Combining Reflexes and External Sensory Information in a Neuromusculoskeletal Model to Control a Quadruped Robot

Auke Ijspeert

This article examines the importance of integrating locomotion and cognitive information for achieving dynamic locomotion from a viewpoint combining biology and ecological psychology. We present a mammalian neuromusculoskeletal model from external sensory ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

A Neural Primitive model with Sensorimotor Coordination for Dynamic Quadruped Locomotion with Malfunction Compensation

Auke Ijspeert

In the field of quadruped locomotion, dynamic locomotion behavior, and rich integration with sensory feedback represents a significant development. In this paper, we present an efficient neural model, which includes CPG and its sensorimotor coordination, a ...

IEEE2020

Walking with Salamanders: From Molecules to Biorobotics

Auke Ijspeert

How do four-legged animals adapt their locomotion to the environment? How do central and peripheral mechanisms interact within the spinal cord to produce adaptive locomotion and how is locomotion recovered when spinal circuits are perturbed? Salamanders ar ...

ELSEVIER SCIENCE LONDON2020

Effects of passive and active joint compliance in quadrupedal locomotion

Auke Ijspeert, Mehmet Hasan Mutlu, Alexandre Bernardino

Compliance of the body has a crucial role on locomotion performance. The levels and the distribution of compliance should be well tuned to obtain efficient gait. The leg stiffness changes significantly even during different phases of a single gait cycle. T ...

TAYLOR & FRANCIS LTD2018

Towards Agility: Definition, Benchmark and Design Considerations for Small, Quadrupedal Robots

Peter Eckert

Agile quadrupedal locomotion in animals and robots is yet to be fully understood, quantified or achieved. An intuitive notion of agility exists, but neither a concise definition nor a common benchmark can be found. Further, it is unclear, what minimal leve ...

EPFL2018

Spinal joint compliance and actuation in a simulated bounding quadruped robot

Auke Ijspeert, Alexander Spröwitz, Soha Pouya

Spine movements play an important role in quadrupedal locomotion, yet their potential benefits in locomotion of quadruped robots have not been systematically explored. In this work, we investigate the role of spinal joint actuation and compliance on the bo ...

Springer2017

Model predictive control based framework for CoM control of a quadruped robot

Auke Ijspeert, Kamilo Andres Melo Becerra, Tomislav Horvat

Model Predictive Control is becoming more and more present in robotic applications. It has been successfully used in control of humanoid robots to adjust positions of the footsteps in order to satisfy stability constraints. In this paper we show how to ada ...

2017

Hardware, software and control design considerations towards low-cost compliant quadruped robots

Alexandre Tuleu

Quadrupedal robots have been a field of interest the last few years, with many new maturing platforms. Many of these projects have in common the use of state of the art actuation and sensing, and therefore are able to handle difficult locomotion tasks very ...

EPFL2016

Cheetah-cub-S: Steering of a Quadruped Robot using Trunk Motion

Auke Ijspeert, Peter Eckert

A reliable concept for steering was realized by in- tegrating a spine-like structure with one DoF into a quadruped robot - Cheetah-cub-S. We increased maneuverability dramat- ically compared to a robot with rigid spine, while keeping controlling effort low ...

2015

Kinematic and gait similarities between crawling human infants and other quadruped mammals

Auke Ijspeert, Ludovic Righetti

Crawling on hands and knees is an early pattern of human infant locomotion, which offers an interesting way of studying quadrupedalism in one of its simplest form. We investigate how crawling human infants compare to other quadruped mammals, especially pri ...

Frontiers Media Sa2015

Pattern Generation for Rough Terrain Locomotion with Quadrupedal Robots : Morphed Oscillators & Sensory Feedback

Mostafa Ajallooeian

Animals are able to locomote on rough terrain without any apparent difficulty, but this does not mean that the locomotor system is simple. The locomotor system is actually a complex multi-input multi-output closed-loop control system. This thesis is dedica ...

EPFL2015

Comparing the effect of different spine and leg designs for a small bounding quadruped robot

Auke Ijspeert, Alexander Spröwitz, Peter Eckert

We present Lynx-robot, a quadruped, modular, compliant machine. It alternately features a directly actuated, single-joint spine design, or an actively supported, passive compliant, multi-joint spine conﬁguration. Both spine con- ﬁgurations bend in the sagi ...

2015

Kinematic primitives for walking and trotting gaits of a quadruped robot with compliant legs

Auke Ijspeert, Alexander Spröwitz, Mostafa Ajallooeian, Alexandre Tuleu

In this work we research the role of body dynamics in the complexity of kinematic patterns in a quadruped robot with compliant legs. Two gait patterns, lateral sequence walk and trot, along with leg length control patterns of different complexity were impl ...

Frontiers Research Foundation2014