The method of combating the mutual load of hydraulic drives by changing the control law

Authors: Vdovin D.A.
Published in issue: #9(50)/2020
DOI: 10.18698/2541-8009-2020-9-639
Category: Power, Metallurgic and Chemical Engineering | Chapter: Hydraulic Machines and Hydropneumatic units
Keywords: hydraulic cylinder, flow rate, differential pressure, mathematical model, slider crank mechanism, hydraulic valve, mutual loading, reference model
Published: 19.10.2020

The paper considers a hydraulic drive with separate control of piston groups. Mathematical functions are found that describe changes in differential pressure corresponding to positive torques from each piston at a nearly constant torque on the output shaft. A law has been developed for controlling hydraulic distributors in the angular velocity tracking mode. The control law takes into account the load on the output shaft, and also uses feedback on the difference between real and reference differential pressure. Mathematical modeling was performed in the MATLAB software package for a nonlinear model of a hydraulic drive, the effectiveness of the applied control law was proved. It is shown that the mutual influence of pistons from different groups was significantly reduced without worsening the uneven rotation of the output shaft at different loads.

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