The observability of the leader robot system and the leader-follower formation control are studied. First, the nonlinear observability is studied for when the leader robot observes landmarks. Second, the system is shown to be completely observable when the leader robot observes two different landmarks. When the leader robot system is observable, multi-robots can rapidly form and maintain a formation based on the bearing-only information that the follower robots observe from the leader robot. Finally, simulations confirm the effectiveness of the proposed formation control.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5398525 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0175378 | PLOS |
Ann Surg
December 2024
Division of General and Transplant Surgery, University of Pisa, Pisa, Italy.
Objective: To validate the ISGPS complexity grading system for minimally invasive pancreaticoduodenectomy (MIPD).
Background: Although concerns about patient safety persist, MIPD is gaining popularity. The ISGPS recently introduced a difficulty grading system to improve patient selection by aligning procedural complexity with surgeon and center expertise.
Commun Biol
December 2024
Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78464, Konstanz, Germany.
Eye tracking has emerged as a key method for understanding how animals process visual information, identifying crucial elements of perception and attention. Traditional fish eye tracking often alters animal behavior due to invasive techniques, while non-invasive methods are limited to either 2D tracking or restricting animals after training. Our study introduces a non-invasive technique for tracking and reconstructing the retinal view of free-swimming fish in a large 3D arena without behavioral training.
View Article and Find Full Text PDFISA Trans
November 2024
College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, 350108, Fujian, China; 5G+ Industrial Internet Institute, Fuzhou University, Fuzhou, 350108, Fujian, China. Electronic address:
This paper proposes a leader-follower control method for multiple snake robot formation. Based on the simplified snake robot model, this work improves the traditional Serpenoid gait mode to a time-varying frequency form. Combined with the line-of-sight (LOS) method, a snake robot trajectory tracking controller is designed to enable the leader to track the desired trajectory at the ideal velocity.
View Article and Find Full Text PDFEur Arch Otorhinolaryngol
November 2024
Department of Otolaryngology-Head & Neck Surgery, Foch Hospital, Suresnes, France.
Objective: To assess the opinion, practices, and challenges of international key opinion leaders about two minimal invasive surgical techniques in supraglottic laryngeal tumours: transoral laser microsurgery (TLM) and the transoral robotic surgery (TORS).
Methods: Design of a questionnaire composed of seven sections and fifty questions covering descriptive data of participants, practitioners experience procedural sequences, considerations related to airways, feeding, and voice, intraoperative haemorrhage, postoperative management, and a comparative analysis of TLM and TORS in treating supraglottic laryngeal cancer.
Results: A total of 27 head and neck surgeons replied to the survey.
Sci Robot
November 2024
Department of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA.
Increasingly functional microscopic machines are poised to have massive technical influence in areas including targeted drug delivery, precise surgical interventions, and environmental remediation. Such functionalities would increase markedly if collections of these microscopic machines were able to coordinate their function to achieve cooperative emergent behaviors. Implementing such coordination, however, requires a scalable strategy for synchronization-a key stumbling block for achieving collective behaviors of multiple autonomous microscopic units.
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