A Breadcrumb Network for Assisting with Autonomous Robot Localization
1 online resource (157 pages) : PDF
University of North Carolina at Charlotte
Localization and communication are critical components for functioning autonomous robots. The infrastructure required or these operations commonly includes global positioning system (GPS) and easily recognizable and re-identifiable landmarks. However, these types of infrastructures are not always readily available. GPS typically uses a low power signal that can be denied intentionally or is unable to penetrate certain materials. Unique landmarks can be difficult to find in unstructured environments like forests, where many potential landmarks can seem nearly identical. To solve this, this research has developed a deploy-able electronic way-point system dubbed ’BreadCrumbs’. BreadCrumbs function as electronic landmarks that can provide localization and communication capabilities to a robot in environments where such infrastructure is not present. When deployed by a forward moving agent with a set destination, the BreadCrumbs also form a series of way-points which reduce the possible state space an autonomous robot must search through when path planning in an unknown or un-mapped environment. The BreadCrumbs are self localizing and have several methods for initial location determination based on the environment they are placed in. GPS is not required for the BreadCrumbs to function and, once established, they can function as landmarks for autonomous robots by providing range data from radio signal strength with a path loss exponent determined through a Deep Deterministic Policy Gradient algorithm. The algorithm is designed such that a path loss exponent for each BreadCrumb location is learned during run time.
Deep Deterministic Policy GradientLocalizationPath Loss Exponent Received Signal Strength IndicationTrilateration
Chen, ChenSmith-Orr, CourtneyBrowne, Aidan
Thesis (Ph.D.)--University of North Carolina at Charlotte, 2021.
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