308 research outputs found
Decentralized formation control with connectivity maintenance and collision avoidance under limited and intermittent sensing
A decentralized switched controller is developed for dynamic agents to
perform global formation configuration convergence while maintaining network
connectivity and avoiding collision within agents and between stationary
obstacles, using only local feedback under limited and intermittent sensing.
Due to the intermittent sensing, constant position feedback may not be
available for agents all the time. Intermittent sensing can also lead to a
disconnected network or collisions between agents. Using a navigation function
framework, a decentralized switched controller is developed to navigate the
agents to the desired positions while ensuring network maintenance and
collision avoidance.Comment: 8 pages, 2 figures, submitted to ACC 201
Energy extraction from rotating regular black hole via magnetic reconnection
Recently, it has been demonstrated that magnetic reconnection processes in
the ergosphere of a Kerr black hole can provide us with a promising mechanism
for extracting the rotational energy from it. In this paper, we study the
energy extraction from the the newly proposed rotating regular black holes via
this magnetic reconnection mechanism. This novel rotating regular black hole
has an exponential convergence factor on the mass term characterized
by the regular parameter in the exponent. We explore the effects of this
regular parameter on the magnetic reconnection as well as other critical
parameters determining the magnetic reconnection process. The parameter spaces
allowing energy extraction to occur are investigated. The power, efficiency and
the power ratio to the Blandford-Znajek mechanism are studied. The results show
that the regularity of the rotating black hole has significant effects on the
energy extraction via the magnetic reconnection mechanism.Comment: 8 pages, 9 figure
Lightweight Neural Path Planning
Learning-based path planning is becoming a promising robot navigation
methodology due to its adaptability to various environments. However, the
expensive computing and storage associated with networks impose significant
challenges for their deployment on low-cost robots. Motivated by this practical
challenge, we develop a lightweight neural path planning architecture with a
dual input network and a hybrid sampler for resource-constrained robotic
systems. Our architecture is designed with efficient task feature extraction
and fusion modules to translate the given planning instance into a guidance
map. The hybrid sampler is then applied to restrict the planning within the
prospective regions indicated by the guide map. To enable the network training,
we further construct a publicly available dataset with various successful
planning instances. Numerical simulations and physical experiments demonstrate
that, compared with baseline approaches, our approach has nearly an order of
magnitude fewer model size and five times lower computational while achieving
promising performance. Besides, our approach can also accelerate the planning
convergence process with fewer planning iterations compared to sample-based
methods.Comment: 8 page
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