Arun Narenthiran Sivakumar is a third year Ph.D. student advised by Prof. Girish Chowdhary in the Distributed Autonomous Systems Laboratory at the University of Illinois, Urbana-Champaign. He is working on vision and learning based navigation of under-canopy agricultural robots. His research interests are applications of vision based navigation, robot learning, self-supervised learning and meta-learning in field robotics.
We describe a system for visually guided autonomous navigation of under-canopy farm robots. Low-cost under-canopy robots can drive between crop rows under the plant canopy and accomplish tasks that are infeasible for over-the-canopy drones or larger agricultural equipment. However, autonomously navigating them under the canopy presents a number of challenges: unreliable GPS and LiDAR, high cost of sensing, challenging farm terrain, clutter due to leaves and weeds, and large variability in appearance over the season and across crop types. We address these challenges by building a modular system that leverages machine learning for robust and generalizable perception from monocular RGB images from low-cost cameras, and model predictive control for accurate control in challenging terrain. Our system, CropFollow, is able to autonomously drive 485 meters per intervention on average, outperforming a state-of-the-art LiDAR based system (286 meters per intervention) in extensive field testing spanning over 25 km.
Co-authors: Sahil Modi, Mateus Valverde Gasparino, Che Ellis, Andres Eduardo Baquero Velasquez, Girish Chowdhary*, Saurabh Gupta*