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Integrated energy saving and position tracking controller for the hydraulic lifting servo system.

Weiping Wang1, Chun Cheng2, Wei Zou2

  • 1School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou 221116, China; School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China.

ISA Transactions
|March 7, 2021
PubMed
Summary

This study introduces an integrated controller for hydraulic lifting servo systems, enhancing energy efficiency and tracking accuracy. The novel approach utilizes a unique valve configuration and observer-based controller for improved performance.

Keywords:
Energy savingHybrid observerHydraulic servo systemPosition tracking

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Area of Science:

  • Control Systems Engineering
  • Fluid Power Systems
  • Robotics

Background:

  • Hydraulic lifting servo systems require high energy efficiency and precise tracking accuracy.
  • Optimizing hardware configuration and nonlinear controllers for these systems presents significant challenges.
  • Existing solutions often struggle to balance energy saving with accurate position control.

Purpose of the Study:

  • To develop an integrated controller that simultaneously addresses energy saving and position tracking in hydraulic lifting servo systems.
  • To propose a novel system configuration that minimizes energy dissipation.
  • To ensure high tracking accuracy using minimal system feedback.

Main Methods:

  • A system configuration based on the three-position-six-way valve structure was proposed to reduce energy dissipation.
  • A hybrid observer-based output feedback controller was developed to ensure accurate tracking performance.
  • Stability analysis was performed using a common Lyapunov function for the multi-model system.

Main Results:

  • The proposed configuration achieved flow regeneration and flow matching, significantly reducing energy loss.
  • Accurate position tracking was guaranteed using only position signal feedback.
  • Case studies demonstrated the effectiveness and superior performance of the integrated controller.

Conclusions:

  • The developed integrated controller effectively balances energy saving and position tracking in hydraulic lifting servo systems.
  • The proposed three-position-six-way valve configuration and hybrid observer-based controller offer a robust solution.
  • This method provides a validated approach for enhancing the performance of hydraulic servo systems.