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Abstract: The
butterfly characteristic between the speed of piston and the pressure of
oil in hydraulic position control system is analyzed, and a kind of
adaptive compensation method is proposed. The method can compensate the
nonlinearity of piston’s movement in different directions, reduce the
influence of load force from hydraulic cylinder piston’s velocity
effectively, and also improve dynamic performances of the system. The
method has good applicability in that parameters used to choose
compensation coefficients can be obtained from field meters directly or
just through simple transforming. It is applied to domestic hot strip
plants, and has good performance.
Key
words: Hydraulic
position control Servo valve Adaptive compensation
CLC No: TP273
国家“九五”攻关项目(97-316-02-02-02).
Received 20040910, received in revised form 20040915 |