Mathematical modeling of electrohydraulic drive  for hydraulic turbine


The results of a systematic study of two mathematical models of multi-actuator electro-hydraulic drive designed for ring gate of hydraulic turbine movement are presented in the work. The main factors, such as the load capacity, the external forces, additionally applied to the servo cylinders, and manufacturing error of hydraulic cylinder pistons, which have a negative impact on the synchronization of the servo cylinders movement, have been investigated. Functional dependences of synchronization error from these factors have been obtained. These dependences allow us to develop reasonable recommendations for selecting the main parameters of the hydraulic drive and determine the operation regularities of this drive.