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Related Concept Videos

Travelling Waves01:04

Travelling Waves

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A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
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The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
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Hydrostatic Pressure Force on a Curved Surface01:04

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Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
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Surface Tension of Fluid01:22

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Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
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Bioinspired Soft Robot with Incorporated Microelectrodes
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Fluid-Driven Traveling Waves in Soft Robots.

Lior Salem1, Amir D Gat1, Yizhar Or1

  • 1Faculty of Mechanical Engineering, TSAP - Technion Autonomous Systems and Robotics Program, Technion - Israel Institute of Technology, Technion City, Israel.

Soft Robotics
|February 4, 2022
PubMed
Summary
This summary is machine-generated.

Soft robots mimic marine animals by using embedded pneumatic networks to generate traveling waves for locomotion. This study provides a theoretical model and experimental validation for creating these bio-inspired robots with simple controls.

Keywords:
fluid–structure interactionsoft roboticstraveling wavesunder-actuated soft robotswavelike robot

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Area of Science:

  • Robotics
  • Biomimetics
  • Fluid Dynamics

Background:

  • Marine creatures like gastropods and earthworms use traveling body waves for locomotion.
  • Soft robots offer advantages in complex environments but often lack efficient locomotion methods.

Purpose of the Study:

  • To theoretically and experimentally investigate embedded pneumatic networks for generating bidirectional traveling waves in soft robots.
  • To mimic natural locomotion mechanisms in artificial systems.

Main Methods:

  • Applied long-wave approximation to derive the necessary pneumatic network distribution and pressure oscillations.
  • Fabricated soft robots based on the analytical model.
  • Conducted experiments to validate the theoretical model and observe locomotion.

Main Results:

  • The theoretical model accurately predicted the required pneumatic network configuration.
  • Experimental results demonstrated the successful propagation of traveling waves in soft robots.
  • The fabricated robots exhibited locomotion capabilities.

Conclusions:

  • Embedded pneumatic networks can effectively generate continuous moving waves in soft robots.
  • This approach allows for bio-inspired locomotion with simple, two-input controls.
  • The findings enable the fabrication of versatile soft robots for navigating complex environments.