2018/04/30 by Tad Hogg
Biochemistry, Genetics and Molecular Biology · Computer Science · Physics and Astronomy · #Computation #Diffusion and Search Dynamics #Exploit #Flow (mathematics) #Micro and Nano Robotics #Motion (physics) #Optimization and Search Problems #Orientation (vector space) #Reynolds number #Robot #Stress (linguistics) #cs.RO #physics.flu-dyn
paper · pdf · doi:10.1007/s12213-018-0109-y
published as J. of Micro-Bio Robots 14:59-67 (2018)
openalex created_date 2018/04/13 · openalex publication_date 2018/09/04 · arxiv created 2018/11/23 · arxiv updated 2018/11/27 · openalex updated_date 2026/08/05
Objects moving in fluids experience patterns of stress on their surfaces determined by their motion and the geometry of nearby boundaries. Fish and underwater robots can use these patterns for navigation. This paper extends this stress-based navigation to microscopic robots in tiny vessels, where robots can exploit the physics of fluids at low Reynolds number. This applies, for instance, in vessels with sizes and flow speeds comparable to those of capillaries in biological tissues. We describe how a robot can use simple computations to estimate its motion, orientation and distance to nearby vessel walls from fluid-induced stresses on its surface. Numerically evaluating these estimates for a variety of vessel sizes and robot positions shows they are most accurate when robots are close to vessel walls.