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Abstract: The
marine rudder electrohydraulic load simulator system has not only big
output force but also large flow because it can simulate enormous
hydraulic-dynamic load. In order to demand for meeting large flow and
eliminate the superfluous force, the dual-valve parallel connected
control scheme is proposed. The dual-valve consisted of large flow
3-stage high-response flow servo valve and p－qV servo valve. The marine
rudder electrohydraulic load simulator is modeled. The model of p－qV
servo valve is analyzed and simplified. The dual-valve real-time control
system is proposed. Compared with the experimental curves of dual-valve
parallel connected control and single flow servo valve control, it is
indicated that the former can more effectively eliminate superfluous
force and improve dynamic load performance index than the latter when
the rudder system starts, stops and changes direction.
Key
words: Electrohydraulic
load simulator Dual-valve parallel connected control
Superfluous force p－qV servo valve
CLC No: TH137
Received
20040606, received in revised form 20041115
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