Biomimetic Microrobots for Navigation in Viscous Fluids: Inspired by Bacterial Locomotion

In this study, we tackle the challenge of designing a robotic system capable of effective locomotion in diverse liquid environments, with a particular focus on high-viscosity fluids. The primary objective is to ensure that the robot can navigate these mediums efficiently, conserving energy while accurately reaching specified targets. Movement in low Reynolds number conditions poses significant difficulties, necessitating the reduction of external disturbances and precise control over direction and trajectory. Drawing inspiration from the locomotion strategies of microorganisms, which excel in navigating viscous environments, we developed a robot that emulates their propulsion techniques. To facilitate a thorough examination of its performance, we scaled up the micro-robot concept to a macro-scale model. This approach enabled us to conduct a series of experiments to assess the robot's propulsion dynamics and movement efficiency across a range of fluid viscosities. Our findings provide valuable insights into designing robots that can operate in complex fluid environments, laying a foundation for future advancements in fields such as medical robotics, underwater exploration, and beyond.