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Abstract: On
the basis of an intelligent pipe bundle-shaping machine developed by
Zhejiang University,a nonlinear control algorithm with two steps is
presented to address the motion synchronization problem for a
two-cylinder electro-hydraulic (EH) system. The outer loop of this
approach is a linear MIMO robust control controller which is used to get
desired pressure for synchronization motion control of two cylinders.
The inner loop controller consists of two SISO pressure controllers
designed by nonlinear perturbation observer theory which are used to
track desired pressure under system disturbances. Experimental results
indicate this new approach is better than conventional PID and can
effectively synchronize two actuators motion.
Key words: Pipe bundle intelligent shaping
Electro-hydraulic proportional control
Motion synchronization Nonlinear control
Robust control
CLC No: TP391
Received 20060220, received in revised form 20060720
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