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Abstract: The electro-hydraulic servo system directly controlled with
speed variable pumps is a competitive and environmental beneficial
driving principle. In this system the all throttle losing existed in
principle can be eliminated and hardly consume any energy in the pause
period, so the system has good efficiency and low noise. The dynamic
performance is investigated with theoretical, simulation and experimental
methods. The results show that the dynamic and static performance can be
compared with the systems controlled by a servo valve.
Key words: Electro-hydraulic servo control Speed variable pump
Differential cylinder circuit
CLC No: TH137
国家自然科学基金(50275102)和教育部留学回国人员科研启动基金(2001345)资助项目.
Received 20020509, received in revised form 20020820
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