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Abstract: The
mathematical model and features of a multi- input-multi-output
pneumatic-hydraulic synchronized loading system are studied. By
analyzing the dynamic progress of the pneumatic loading subsystem, the
main elements are presented, which can greatly affect dynamic
characteristic. A compound control strategy is proposed, which consists
of robust control based on H∞ theory, synchronization control and
coordination control. By means of controlling the electro-hydraulic
proportional valve or electro-pneumatic proportional valve of each
channel, a proving structure is loaded by 6 hydraulic actuators and 4
air chambers synchronously. Experimental results demonstrate that the
compound control law is correct and feasible for the
multi-input-multi-output pneumatic-hydraulic synchronized loading
system.
Key
words: Pneumatic-hydraulic
Synchronized loading Proportional compound control Robust
control
CLC No: TP273
Received
20040923, received in revised form 20051231
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