{"id":4402,"date":"2021-07-08T13:48:35","date_gmt":"2021-07-08T12:48:35","guid":{"rendered":"https:\/\/mecatron.rma.ac.be\/?page_id=4402"},"modified":"2025-01-14T09:16:09","modified_gmt":"2025-01-14T08:16:09","slug":"alexandre-la-grappe","status":"publish","type":"page","link":"https:\/\/mecatron.rma.ac.be\/index.php\/people\/alexandre-la-grappe\/","title":{"rendered":"Alexandre La Grappe"},"content":{"rendered":"<p><section class=\"kc-elm kc-css-383114 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-31300 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-893803\" style=\"height: 20px; clear: both; width:100%;\"><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-825207 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-176918 kc_col-sm-4 kc_column kc_col-sm-4\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-138940 kc_shortcode kc_single_image\">\n\n        <img decoding=\"async\" src=\"https:\/\/mecatron.rma.ac.be\/wp-content\/uploads\/2021\/07\/Alexandre_La_Grappe.png\" class=\"\" alt=\"\" \/>    <\/div>\n<div class=\"kc-elm kc-css-557573 kc_text_block\"><\/p>\n<h4><span style=\"color: inherit; font-size: 1.25em; font-style: inherit;\">Researcher<\/span><\/h4>\n<p>Robotics &#038; Autonomous Systems,<br \/>Royal Military Academy<\/p>\n<h4>Address<\/h4>\n<p>Avenue De La Renaissance 30, 1000 Brussels, Belgium<\/p>\n<h4>Contact Information<\/h4>\n<p><strong>Call<\/strong>: &#8211;<\/p>\n<p><strong>Email<\/strong>: <a href=\"mailto:Alexandre.LaGrappe@mil.be\" target=\"_blank\" rel=\"noopener\">Alexandre.LaGrappe@mil.be<\/a><\/p>\n<p>\n<\/div><\/div><\/div><div class=\"kc-elm kc-css-686351 kc_col-sm-7 kc_column kc_col-sm-7\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-995942 kc_text_block\"><\/p>\n<p class=\"aLF-aPX-K0-aPE\">Alexandre is a robotics researcher at the Robotics &#038; Autonomous Systems unit of the Department of Mechanics of the Belgian Royal Military Academy. His research focuses on developing solutions for heterogeneous robot fleet management in tough environments.<\/p>\n<p>He received his Master&#039;s Degree in Mechatronics Engineering from the\u00a0<a href=\"https:\/\/www.vub.be\/en\">Vrije Universiteit Brussel<\/a>\u00a0and the\u00a0<a href=\"https:\/\/www.ulb.be\/en\/ulb-homepage\">Universit\u00e9 Libre de Bruxelles<\/a>\u00a0in 2019. He then started working as a scientific project leader for the\u00a0<a href=\"https:\/\/www.imec-int.com\/en\">Interuniversity Microelectronics Centre (IMEC)<\/a>. He coordinated research on novel semiconductor manufacturing processes using dry film photoresist.<\/p>\n<p class=\"aLF-aPX-K0-aPE\"><span style=\"font-style: inherit;\">In 2021, Alexandre joined the Belgian Royal Military Academy to participate in the <\/span><a style=\"font-style: inherit;\" href=\"https:\/\/mecatron.rma.ac.be\/index.php\/projects\/imugs\/\">iMUGS<\/a><span style=\"font-style: inherit;\"> project that aims to develop and deploy a modular, standardized, and open system architecture for manned-unmanned team of robots to support armed forces on the field.<\/span><\/p>\n<p>\n<\/div><\/div><\/div><div class=\"kc-elm kc-css-655227 kc_col-sm-1 kc_column kc_col-sm-1\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-707421 kc-raw-code\"><script src=\"https:\/\/kit.fontawesome.com\/5feed4ac07.js\" crossorigin=\"anonymous\"><\/script>\r\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.rawgit.com\/jpswalsh\/academicons\/master\/css\/academicons.min.css\">\r\n<span style=\"font-size: 36px; color: Dodgerblue;\">\r\n<center>\r\n<a href=\"mailto:Alexandre.LaGrappe@mil.be\"> <i class=\"fas fa-envelope fas-3x\"><\/i><\/a><br><br>\r\n<a href=\"\"> <i class=\"fab fa-skype fab-3x\"><\/i><\/a><br><br>\r\n<a href=\"\"> <i class=\"fab fa-twitter\"><\/i><\/a><br><br>\r\n<a href=\"https:\/\/www.linkedin.com\/in\/alexandre-la-grappe-29564212a\"> <i class=\"fab fa-linkedin\"><\/i><\/a><br><br>\r\n<a href=\"\"> <i class=\"ai ai-cv-square ai\"><\/i><\/a><br><br>\r\n<\/center>\r\n<\/span>\r\n<span style=\"font-size: 36px; color: Dodgerblue;\">\r\n<center>\r\n<a href=\"\"><i class=\"ai ai-google-scholar-square ai\"><\/i><\/a><br><br>\r\n<a href=\"\"><i class=\"fab fa-researchgate\"><\/i><\/a><br><br>\r\n<a href=\"\"><i class=\"fab fa-mendeley\"><\/i><\/a><br><br>\r\n<a href=\"\"><i class=\"ai ai-researcherid-square ai\"><\/i><\/a><br><br>\r\n<a href=\"https:\/\/orcid.org\/0000-0002-1347-2280\"><i class=\"ai ai-orcid-square ai\"><\/i><\/a>\r\n<\/center>\r\n<\/span><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-364416 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-382153 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-112238\" style=\"height: 20px; clear: both; width:100%;\"><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-387298 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-800675 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\">\n<div class=\"kc-elm kc-css-366523 kc-title-wrap \">\n\n\t<h2 class=\"kc_title\">Publications<\/h2>\n<\/div>\n<div class=\"kc-elm kc-css-946911 kc_text_block\"><\/p>\n<p><span style=\"font-style: inherit;\"><\/p>\n<h3 class=\"papercite\">2025<\/h3>\n<ul class=\"papercite_bibliography\">\n<li>    A. La Grappe, E. Le Fl\u00e9cher, and G. De Cubber, &#8220;Multi-Sensor Multi-Target Tracking for Maritime Surveillance with Autonomous Surface Vehicles Using Belief Propagation,\" in <span style=\"font-style: italic\">OCEANS 2025 Brest<\/span>,  2025, p. 1\u20138.    <br \/>   <a href=\"javascript:void(0)\" id=\"papercite_0\" class=\"papercite_toggle\">[BibTeX]<\/a>      <a href=\"javascript:void(0)\" id=\"papercite_abstract_0\" class=\"papercite_toggle\">[Abstract]<\/a>         <a href=\"https:\/\/ieeexplore.ieee.org\/document\/11104349\" title='Download PDF' class='papercite_pdf'>[Download PDF]<\/a>         <a href='http:\/\/dx.doi.org\/10.1109\/OCEANS58557.2025.11104349' class='papercite_doi' title='View on publisher site'>[DOI]<\/a><br \/>\n<blockquote class=\"papercite_bibtex\" id=\"papercite_abstract_0_block\">\n<p>We present a distributed multi-sensor multi-target tracking algorithm for maritime surveillance using unmanned surface vehicles (USVs) in multi-agent settings. Our approach fuses measurements from radar, Automatic Identification System (AIS), and camera sensors within a Bayesian framework, employing an adaptive particle filtering strategy to jointly estimate the kinematic states and identities of vessels. Our solution incorporates a factorized data association model that integrates cooperative self-reports from AIS with radar and camera measurements, with visual re-identification capability. We evaluate our method using a high-fidelity simulation environment, which generates photorealistic maritime scenarios. Our performance analysis indicates that the integration of camera-based cues improves both the spatial localization and identity consistency, particularly in scenarios with low radar detection probability and non-cooperative targets. Furthermore, the distributed inference framework scales well with the number of USVs, making it well suited for large-scale multi-agent applications. Overall, our work demonstrates that fusing heterogeneous sensor modalities using belief propagation can enhance multi-target tracking performance in congested maritime environments.<\/p>\n<\/blockquote>\n<div class=\"papercite_bibtex\" id=\"papercite_0_block\">\n<pre><code class=\"tex bibtex\">@inproceedings{2c491cd7d3c64ae3ae227fdab6a2c80f,\ntitle = \"Multi-Sensor Multi-Target Tracking for Maritime Surveillance with Autonomous Surface Vehicles Using Belief Propagation\",\nabstract = \"We present a distributed multi-sensor multi-target tracking algorithm for maritime surveillance using unmanned surface vehicles (USVs) in multi-agent settings. Our approach fuses measurements from radar, Automatic Identification System (AIS), and camera sensors within a Bayesian framework, employing an adaptive particle filtering strategy to jointly estimate the kinematic states and identities of vessels. Our solution incorporates a factorized data association model that integrates cooperative self-reports from AIS with radar and camera measurements, with visual re-identification capability. We evaluate our method using a high-fidelity simulation environment, which generates photorealistic maritime scenarios. Our performance analysis indicates that the integration of camera-based cues improves both the spatial localization and identity consistency, particularly in scenarios with low radar detection probability and non-cooperative targets. Furthermore, the distributed inference framework scales well with the number of USVs, making it well suited for large-scale multi-agent applications. Overall, our work demonstrates that fusing heterogeneous sensor modalities using belief propagation can enhance multi-target tracking performance in congested maritime environments.\",\nkeywords = \"Visualization, Target tracking, Radar measurements, Surveillance, Radar, Radar tracking, Cameras, Particle measurements, Sensors, Artificial intelligence, Multi-target tracking, Maritime surveillance, Unmanned Surface Vessels, Distributed sensor fusion, Particle filtering, Belief propagation, Multi-agent robotics\",\nauthor = \"La Grappe, Alexandre and Le Fl\u00e9cher, Emile and De Cubber, Geert\",\nyear = \"2025\",\nmonth = jun,\nday = \"19\",\ndoi = \"10.1109\/OCEANS58557.2025.11104349\",\nlanguage = \"English\",\npages = \"1--8\",\nbooktitle = \"OCEANS 2025 Brest\",\npublisher = \"Institute of Electrical and Electronics Engineers Inc.\",\nurl = \"https:\/\/ieeexplore.ieee.org\/document\/11104349\",\nunit= meca-ras,\nproject= MULTIMETER\n}<\/code><\/pre>\n<\/p>\n<\/div>\n<\/li>\n<\/ul>\n<h3 class=\"papercite\">2023<\/h3>\n<ul class=\"papercite_bibliography\">\n<li>    G. De Cubber, E. Le Fl\u00e9cher, A. La Grappe, E. Ghisoni, E. Maroulis, P. Ouendo, D. Hawari, and D. Doroftei, &#8220;Dual Use Security Robotics: A Demining, Resupply and Reconnaissance Use Case,\" in <span style=\"font-style: italic\">IEEE International Conference on Safety, Security, and Rescue Robotics<\/span>,  2023.    <br \/>   <a href=\"javascript:void(0)\" id=\"papercite_1\" class=\"papercite_toggle\">[BibTeX]<\/a>         <a href=\"https:\/\/mecatron.rma.ac.be\/pub\/2023\/SSRR2023-DeCubber.pdf\" title='Download PDF' class='papercite_pdf'>[Download PDF]<\/a>\n<div class=\"papercite_bibtex\" id=\"papercite_1_block\">\n<pre><code class=\"tex bibtex\">@inproceedings{ssrr2023decubber,\ntitle={Dual Use Security Robotics: A Demining, Resupply and Reconnaissance Use Case},\nauthor={De Cubber, Geert and Le Fl\u00e9cher, Emile and La Grappe, Alexandre and Ghisoni, Enzo and Maroulis, Emmanouil and Ouendo, Pierre-Edouard and Hawari, Danial and Doroftei, Daniela},\nbooktitle={IEEE International Conference on Safety, Security, and Rescue Robotics},\neditors ={Kimura, Tetsuya},\npublisher = {IEEE},\nyear = {2023},\nvol = {1},\nproject = {AIDED, iMUGs, CUGS},\nlocation = {Fukushima, Japan},\nunit= {meca-ras},\ndoi = {},\nurl={https:\/\/mecatron.rma.ac.be\/pub\/2023\/SSRR2023-DeCubber.pdf}\n}<\/code><\/pre>\n<\/p>\n<\/div>\n<\/li>\n<\/ul>\n<h3 class=\"papercite\">2022<\/h3>\n<ul class=\"papercite_bibliography\">\n<li>    E. Le Fl\u00e9cher, A. La Grappe, and G. De Cubber, &#8220;iMUGS &#8211; A ground multi-robot architecture for military Manned-Unmanned Teaming,\" in <span style=\"font-style: italic\">2022 IEEE\/RSJ International Conference on Intelligent Robots and Systems (IROS)<\/span>, IEEE, 2022.    <br \/>   <a href=\"javascript:void(0)\" id=\"papercite_2\" class=\"papercite_toggle\">[BibTeX]<\/a>\n<div class=\"papercite_bibtex\" id=\"papercite_2_block\">\n<pre><code class=\"tex bibtex\">@inbook{imugs_le_flecher_la_grappe_de_cubber,\nplace={Kyoto},\ntitle={iMUGS - A ground multi-robot architecture for military Manned-Unmanned Teaming},\nbooktitle={2022 IEEE\/RSJ International Conference on Intelligent Robots and Systems (IROS)},\npublisher={IEEE},\nyear={2022},\nauthor={Le Fl\u00e9cher, Emile and La Grappe, Alexandre and De Cubber, Geert},\nproject = {iMUGs},\nunit= {meca-ras}\n}<\/code><\/pre>\n<\/p>\n<\/div>\n<\/li>\n<\/ul>\n<p><\/span><\/p>\n<p>\n<\/div><\/div><\/div><\/div><\/div><\/section><section class=\"kc-elm kc-css-501350 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-586870 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-424582\" style=\"height: 20px; clear: both; width:100%;\"><\/div><\/div><\/div><\/div><\/div><\/section><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":250,"parent":3120,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4402","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/pages\/4402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/comments?post=4402"}],"version-history":[{"count":5,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/pages\/4402\/revisions"}],"predecessor-version":[{"id":5069,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/pages\/4402\/revisions\/5069"}],"up":[{"embeddable":true,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/pages\/3120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/media\/250"}],"wp:attachment":[{"href":"https:\/\/mecatron.rma.ac.be\/index.php\/wp-json\/wp\/v2\/media?parent=4402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}