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A switched energy saving position controller for variable-pressure electro-hydraulic servo systems.

Ali Tivay1, Mohammad Zareinejad2, S Mehdi Rezaei1

  • 1Amirkabir University of Technology, Mechanical Engineering Department, 424 Hafez Ave., Tehran 15875-4413, Iran.

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|June 3, 2014
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This study enhances electro-hydraulic servo system (EHSS) efficiency by introducing variable supply pressure control. The new system reduces energy consumption during position tracking tasks.

Keywords:
Electro hydraulicEnergy savingSwitched linear controlVariable supply pressure

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Area of Science:

  • Engineering
  • Control Systems
  • Robotics

Background:

  • Electro-hydraulic servo systems (EHSS) exhibit lower efficiency than alternative actuation technologies.
  • Optimizing EHSS efficiency is crucial for energy conservation in various applications.

Purpose of the Study:

  • To improve the energy efficiency of electro-hydraulic servo systems.
  • To develop a control strategy for variable supply pressure in EHSS for position tracking.

Main Methods:

  • A novel EHSS structure with controllable supply pressure was designed.
  • The system's dynamic model was derived using fundamental physics principles.
  • A switching control strategy was developed to simultaneously manage supply pressure and cylinder position.

Main Results:

  • The proposed switching control system effectively reduced overall energy consumption.
  • Stability analysis confirmed the robustness of the control system.
  • Experimental validation demonstrated the system's performance in position tracking.

Conclusions:

  • The variable supply pressure control strategy significantly enhances EHSS energy efficiency.
  • The developed switching control system offers a stable and effective solution for energy-saving EHSS.
  • This approach presents a viable method for reducing energy usage in hydraulic actuation systems.