ARTICLE Bilaloglu_IEEERA-L_2023/IDIAP Whole-Body Ergodic Exploration with a Manipulator Using Diffusion Bilaloglu, Cem Löw, Tobias Calinon, Sylvain ergodic exploration Optimization and Optimal Control Whole-Body Motion Planning and Control EXTERNAL http://publications.idiap.ch/attachments/papers/2023/Bilaloglu_IEEERA-L_2023.pdf PUBLIC IEEE Robotics and Automation Letters 8 12 8581-8587 2377-3766 2023 https://ieeexplore.ieee.org/document/10305244?source=authoralert URL 10.1109/LRA.2023.3329755 doi This paper presents a whole-body robot control method for exploring and probing a given region of interest. The ergodic control formalism behind such an exploration behavior consists of matching the time-averaged statistics of a robot trajectory with the spatial statistics of the target distribution. Most existing ergodic control approaches assume the robots/sensors as individual point agents moving in space. We introduce an approach that decomposes the whole-body of a robotic manipulator into multiple kinematically constrained agents. Then, we generate control actions by calculating a consensus among the agents. To do so, we use an ergodic control formulation called heat equation-driven area coverage (HEDAC) and slow the diffusion using the non-stationary heat equation. Our approach extends HEDAC to applications where robots have multiple sensors on the whole-body (such as tactile skin) and use all sensors to optimally explore the given region. We show that our approach increases the exploration performance in terms of ergodicity and scales well to real-world problems. We compare our method in kinematic simulations with the state-of-the-art and demonstrate the applicability of an online exploration task with a 7-axis Franka Emika robot. Additional material available at \noindent{\url{https://sites.google.com/view/w-ee-d/}}