METHOD OF CONTROL OF ROTATION OF DRIVE SHAFT OF FLUID POWER SERVODRIVE Russian patent published in 2013 - IPC F15B9/03 

FIELD: machine building.

SUBSTANCE: method includes conversion of reciprocating movements of two actuating devices to rotation of drive shaft with control of movement of each actuating device by internal actuating signal, generation of the first and the second command signals from it, measurement of angle of rotation of drive shaft and its conversion to the first and the second feedback signals proportional respectively to sine and cosine of angle of rotation of drive shaft and generation of the first and the second control signals by means of diminishing of respective command signal to the value of corresponding feedback signal, at that drive signal is generated proportional to the preset change of drive shaft angle of rotation in time, and the first and the second command signals are generated proportional to sine and cosine of preset angle of rotation of drive shaft, at that pressure is measured in working cavities of actuating devices and these signals are compared to preset signals, and command signal is modified by value of discrepancy.

EFFECT: providing smooth angular speed of shaft rotation and excluding impact of force interaction of electro hydraulic machines and impact of external load.

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