Abstract: Based on theories of electrohydraulic servosystems and fluid
dynamics, electrohydraulic servo-valves, the key parts of
electrohydraulic servosystems, are analyzed in centrifugal force
field. Forces acting on typical two-stage valves are formulated
in sequence. Centrifugal force is included in equations.
Conclusions from analysis and experimental data are shown as
follows. Centrifugal acceleration is directly proportional to
null shift with current and the scale factor is formulated.
Methods reducing the influence of centrifugal force are offered.
The research is shortfall at home and abroad, and it is helpful
to researchers who study electrohydraulic servo-valves in
centrifugal force field.
Key words: Fluid
dynamics Electrohydraulic servo-valves Centrifugal force
*
This project
is supported by National Natural Science Foundation of China. Manuscript received on
June 26, 1998; revised manuscript February 25, 1998
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