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Related Concept Videos

ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
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ATP Driven Pumps II: P-type Pumps01:34

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The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
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ATP Driven Pumps I: An Overview01:27

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ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
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Related Experiment Video

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Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
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A Novel Tendon-Driven Soft Actuator with Self-Pumping Property.

Tao Ren1, Yingtian Li2, Menghong Xu2

  • 1Robotics Research Center, Xihua University, Chengdu, China.

Soft Robotics
|October 5, 2019
PubMed
Summary

This study introduces a novel soft self-pumping actuator (SSPA) for untethered soft robots. This design improves energy efficiency by up to 45% through internal air transmission for enhanced actuation.

Keywords:
energy efficiencyself-pumpingsoft actuatorssoft robotstendon-driven robots

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Area of Science:

  • Robotics
  • Materials Science
  • Mechanical Engineering

Background:

  • Soft actuators and robotics offer safe human interaction but are limited by tethers and low energy efficiency.
  • Existing soft pneumatic actuators (SPAs) often require external power sources and complex control systems.
  • Untethered and energy-efficient soft robotic systems are crucial for practical applications.

Purpose of the Study:

  • To introduce a novel tendon-driven soft actuator with self-pumping capabilities (SSPA).
  • To demonstrate precise, untethered control and improved energy efficiency in soft actuators.
  • To investigate the potential of SSPAs for developing advanced soft robots.

Main Methods:

  • Designed a soft self-pumping actuator (SSPA) by connecting two soft pneumatic actuators (SPAs) with check valves.
  • Utilized tendons for precise and untethered control of the SSPA.
  • Investigated the effect of differential chamber air pressure on actuator bending and energy efficiency through experimental studies.

Main Results:

  • The SSPA design enables self-pumping actuation through internal air transmission between chambers.
  • Experimental results showed an energy efficiency increase of up to 45% compared to non-transmitting designs.
  • Differential chamber air pressure was found to reduce the force required for actuator bending initiation.

Conclusions:

  • The proposed soft self-pumping actuator (SSPA) offers a promising solution for untethered and energy-efficient soft robotics.
  • The tendon-driven mechanism allows for precise control, overcoming limitations of traditional SPAs.
  • This novel concept could pave the way for more advanced and practical soft robotic systems.