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Digital Control Method and Performance Analysis of the Double-Compound Axial Piston Pump.

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Summary

A new digital control system for double-compound axial piston pumps offers improved flow control range and accuracy over traditional methods. This system enhances energy efficiency and prime mover performance.

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Area of Science:

  • Engineering
  • Fluid Mechanics
  • Control Systems

Background:

  • Traditional mechanical-hydraulic feedback servo control for double-compound axial piston pumps exhibits limited flow control range and poor accuracy.
  • Precise control and cooperative operation of double pumps are crucial for efficient performance.

Purpose of the Study:

  • To propose and validate a digital control scheme and strategy for double-compound axial piston pumps using a linear stepper motor direct drive servo valve.
  • To enhance flow control precision, enable double pump cooperation, and improve overall system performance.

Main Methods:

  • Development of a numerical model for the digital control double-compound axial piston pump.
  • Experimental verification of the numerical model's validity.
  • Analysis of digital control advantages over traditional methods and evaluation of the double pump control strategy.

Main Results:

  • The digital control method achieves a wider flow control range compared to traditional mechanical-hydraulic feedback servo control.
  • The proposed digital control avoids torque impact on the prime mover.
  • The control strategy, integrating flow and power control with four modes, meets performance requirements, prioritizing energy saving.

Conclusions:

  • Digital control offers superior performance for double-compound axial piston pumps, enhancing flow control and energy efficiency.
  • The developed control strategy optimizes power matching to load and flow to speed.
  • This research provides a foundation for accurate matching and optimization in axial piston pump systems.