Dynamic Response Analysis of the Bi-Tandem Axial Piston Pump with Dual-Loop Positive Flow Control under Pressure Disturbance

The bi-tandem axial piston pump is an indispensable powerhouse in high-pressure and high-power engineering hydraulic systems, with its output flow response characteristics under pressure disturbance exerting a significant influence on the working process of double pumps. Unfortunately, stability original single-loop mechanical–hydraulic servo control system sensitive to unpredictable interference. To alleviate this quandary, paper proposes dual-loop positive method for pump, establishes mathematical model control, simulation based Simulink. validity verified by experiments. performance advantages relative are analyzed. results show faster speed smaller steady-state error method, which performs better than control. Furthermore, study examines different forms, degrees, directions dynamic pump. Symmetric increase maximum proportional degree. Notably, asymmetric pumps possesses superimposable nature, value highly dependent superimposed less affected action time point disturbance. Further, unloading exerts compared loading This provides valuable insights into improving accuracy equipped