Search Results for author: Giovanni Beltrame

Found 17 papers, 12 papers with code

Reinforcement Learning with Elastic Time Steps

no code implementations22 Feb 2024 Dong Wang, Giovanni Beltrame

Given the discrete nature of RL algorithms, they are oblivious to the effects of the choice of control rate: finding the correct control rate can be difficult and mistakes often result in excessive use of computing resources or even lack of convergence.

reinforcement-learning Reinforcement Learning (RL)

Deployable Reinforcement Learning with Variable Control Rate

1 code implementation17 Jan 2024 Dong Wang, Giovanni Beltrame

Unfortunately, the system should be controlled at the highest, worst-case frequency to ensure stability, which can demand significant computational and energy resources and hinder the deployability of the controller on onboard hardware.

reinforcement-learning Reinforcement Learning (RL)

Real-Time Simultaneous Localization and Mapping with LiDAR intensity

1 code implementation23 Jan 2023 Wenqiang Du, Giovanni Beltrame

To avoid this problem, we extract feature points from the LiDAR-generated point cloud that match features identified in LiDAR intensity images.

Simultaneous Localization and Mapping

Swarm-SLAM : Sparse Decentralized Collaborative Simultaneous Localization and Mapping Framework for Multi-Robot Systems

1 code implementation16 Jan 2023 Pierre-Yves Lajoie, Giovanni Beltrame

Collaborative Simultaneous Localization And Mapping (C-SLAM) is a vital component for successful multi-robot operations in environments without an external positioning system, such as indoors, underground or underwater.

Simultaneous Localization and Mapping

Self-Supervised Domain Calibration and Uncertainty Estimation for Place Recognition

1 code implementation8 Mar 2022 Pierre-Yves Lajoie, Giovanni Beltrame

We show that our approach can improve the performance of a state-of-the-art technique on a target environment dissimilar from its training set and that we can obtain uncertainty estimates.

Simultaneous Localization and Mapping Visual Place Recognition

The Portiloop: a deep learning-based open science tool for closed-loop brain stimulation

1 code implementation28 Jul 2021 Nicolas Valenchon, Yann Bouteiller, Hugo R. Jourde, Xavier L'Heureux, Milo Sobral, Emily B. J. Coffey, Giovanni Beltrame

Closed-loop brain stimulation refers to capturing neurophysiological measures such as electroencephalography (EEG), quickly identifying neural events of interest, and producing auditory, magnetic or electrical stimulation so as to interact with brain processes precisely.

EEG Spindle Detection

NeBula: Quest for Robotic Autonomy in Challenging Environments; TEAM CoSTAR at the DARPA Subterranean Challenge

no code implementations21 Mar 2021 Ali Agha, Kyohei Otsu, Benjamin Morrell, David D. Fan, Rohan Thakker, Angel Santamaria-Navarro, Sung-Kyun Kim, Amanda Bouman, Xianmei Lei, Jeffrey Edlund, Muhammad Fadhil Ginting, Kamak Ebadi, Matthew Anderson, Torkom Pailevanian, Edward Terry, Michael Wolf, Andrea Tagliabue, Tiago Stegun Vaquero, Matteo Palieri, Scott Tepsuporn, Yun Chang, Arash Kalantari, Fernando Chavez, Brett Lopez, Nobuhiro Funabiki, Gregory Miles, Thomas Touma, Alessandro Buscicchio, Jesus Tordesillas, Nikhilesh Alatur, Jeremy Nash, William Walsh, Sunggoo Jung, Hanseob Lee, Christoforos Kanellakis, John Mayo, Scott Harper, Marcel Kaufmann, Anushri Dixit, Gustavo Correa, Carlyn Lee, Jay Gao, Gene Merewether, Jairo Maldonado-Contreras, Gautam Salhotra, Maira Saboia Da Silva, Benjamin Ramtoula, Yuki Kubo, Seyed Fakoorian, Alexander Hatteland, Taeyeon Kim, Tara Bartlett, Alex Stephens, Leon Kim, Chuck Bergh, Eric Heiden, Thomas Lew, Abhishek Cauligi, Tristan Heywood, Andrew Kramer, Henry A. Leopold, Chris Choi, Shreyansh Daftry, Olivier Toupet, Inhwan Wee, Abhishek Thakur, Micah Feras, Giovanni Beltrame, George Nikolakopoulos, David Shim, Luca Carlone, Joel Burdick

This paper presents and discusses algorithms, hardware, and software architecture developed by the TEAM CoSTAR (Collaborative SubTerranean Autonomous Robots), competing in the DARPA Subterranean Challenge.

Decision Making Motion Planning

Multi-robot energy autonomy with wind and constrained resources

no code implementations21 Jan 2021 Hassan Fouad, Giovanni Beltrame

One aspect of the ever-growing need for long term autonomy of multi-robot systems, is ensuring energy sufficiency.

Robotics Systems and Control Systems and Control

Reinforcement Learning with Random Delays

3 code implementations ICLR 2021 Simon Ramstedt, Yann Bouteiller, Giovanni Beltrame, Christopher Pal, Jonathan Binas

Action and observation delays commonly occur in many Reinforcement Learning applications, such as remote control scenarios.

Anatomy Continuous Control +2

DOOR-SLAM: Distributed, Online, and Outlier Resilient SLAM for Robotic Teams

1 code implementation26 Sep 2019 Pierre-Yves Lajoie, Benjamin Ramtoula, Yun Chang, Luca Carlone, Giovanni Beltrame

This paper introduces DOOR-SLAM, a fully distributed SLAM system with an outlier rejection mechanism that can work with less conservative parameters.

Robotics

Decentralized Connectivity Control in Quadcopters: a Field Study of Communication Performance

1 code implementation23 Sep 2019 Jacopo Panerati, Benjamin Ramtoula, David St-Onge, Yanjun Cao, Marcel Kaufmann, Aidan Cowley, Lorenzo Sabattini, Giovanni Beltrame

Redundancy and parallelism make decentralized multi-robot systems appealing solutions for the exploration of extreme environments.

Robotics Multiagent Systems C.2.4; C.4; I.2.9

An Adversarial Approach to Private Flocking in Mobile Robot Teams

2 code implementations23 Sep 2019 Hehui Zheng, Jacopo Panerati, Giovanni Beltrame, Amanda Prorok

We present a method that generates private flocking controllers that hide the identity of the leader robot.

Motion Planning

Modeling Perceptual Aliasing in SLAM via Discrete-Continuous Graphical Models

1 code implementation27 Oct 2018 Pierre-Yves Lajoie, Siyi Hu, Giovanni Beltrame, Luca Carlone

Perceptual aliasing is one of the main causes of failure for Simultaneous Localization and Mapping (SLAM) systems operating in the wild.

Robotics 65K05, 62F10, 68T40, 68W40, 68W25, I.2.9; G.1.6

Decentralized Connectivity-Preserving Deployment of Large-Scale Robot Swarms

no code implementations1 Jun 2018 Nathalie Majcherczyk, Adhavan Jayabalan, Giovanni Beltrame, Carlo Pinciroli

We present a decentralized and scalable approach for deployment of a robot swarm.

Robotics Multiagent Systems

ROS and Buzz: consensus-based behaviors for heterogeneous teams

1 code implementation24 Oct 2017 David St-Onge, Vivek Shankar Varadharajan, Guannan Li, Ivan Svogor, Giovanni Beltrame

This paper address the challenges encountered by developers when deploying a distributed decision-making behavior on heterogeneous robotic systems.

Robotics

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