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- W4310632880 abstract "Nano-size unmanned aerial vehicles (UAVs) hold enormous potential to perform autonomous operations in complex environments, such as inspection, monitoring or data collection. Moreover, their small size allows safe operation close to humans and agile flight. An important part of autonomous flight is localization, which is a computationally intensive task especially on a nano-UAV that usually has strong constraints in sensing, processing and memory. This work presents a real-time localization approach with low element-count multizone range sensors for resource-constrained nano-UAVs. The proposed approach is based on a novel miniature 64-zone time-of-flight sensor from ST Microelectronics and a RISC-V-based parallel ultra low-power processor, to enable accurate and low latency Monte Carlo Localization on-board. Experimental evaluation using a nano-UAV open platform demonstrated that the proposed solution is capable of localizing on a 31.2m$boldsymbol{^2}$ map with 0.15m accuracy and an above 95% success rate. The achieved accuracy is sufficient for localization in common indoor environments. We analyze tradeoffs in using full and half-precision floating point numbers as well as a quantized map and evaluate the accuracy and memory footprint across the design space. Experimental evaluation shows that parallelizing the execution for 8 RISC-V cores brings a 7x speedup and allows us to execute the algorithm on-board in real-time with a latency of 0.2-30ms (depending on the number of particles), while only increasing the overall drone power consumption by 3-7%. Finally, we provide an open-source implementation of our approach." @default.
- W4310632880 created "2022-12-13" @default.
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- W4310632880 date "2022-11-25" @default.
- W4310632880 modified "2023-10-16" @default.
- W4310632880 title "Fully On-board Low-Power Localization with Multizone Time-of-Flight Sensors on Nano-UAVs" @default.
- W4310632880 doi "https://doi.org/10.48550/arxiv.2212.00710" @default.
- W4310632880 hasPublicationYear "2022" @default.
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