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DYNAMIC LEARNING OF SOLENOID P-I CURVES FOR CLOSED LOOP PRESSURE CONTROLS
DYNAMIC LEARNING OF SOLENOID P-I CURVES FOR CLOSED LOOP PRESSURE CONTROLS
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机译:动态电磁学习P-I曲线用于闭环压力控制
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摘要
In a pressure control system having a solenoid-operated fluid valve that has an output hydraulic pressure which varies in accordance with a solenoid input signal, a dynamic learning block is configured to adjust the initial, default values for control points stored in a pressure-current (P-I) data table based on observed (measured) operating points that reflect the solenoid's actual transfer characteristic. A feed forward control block is configured to generate the solenoid input signal having a level based on the adjusted control points in the data table, which improves the accuracy of the solenoid input signal. An adjustment method uses a plurality of circular buffers each configured to store observed operating points falling within a respective range, and provides a mechanism to allow adjustment of the control points based on only partial data.
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