吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (4): 592-596.

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Power matching for energy-saving control system of hydraulic excavators

SHANG Tao, ZHAO Dingxuan, XIAO Yingkui, GUO Xiang'en, JIN Lisheng, ZHANG Hongyan   

  1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2004-05-18 Online:2004-10-01

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Abstract: A system made up of the engine, the variable delivery pump, the control valve and the load of a hydraulic excavator was studied to explore the principle and the technique of the power matching between its elements. An adaptive control of the power system against the operating conditions was implemented according to the pressure at the pump outlet. The power matching between the engine and the pump was achieved by the rotation speed feedback control. The power matching between the pump and the load was brought about by using a microcomputer to adjust the multipassage directional valve opening according to the flow rate at the pump outlet. The proposed technique on-line real-time adjusts the PID parameters by means of fuzzy algorithm to realize the energy-saving adaptive control over the hydraulic excavator without the shortcoming of pressure only or rotation only control.

Key words: hydro transmission and control, hydraulic excavator, power matching, load estimation, energy saving control, fuzzy-PID

CLC Number: 

  • U270.1
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