EMPIRICAL INVESTIGATION ON THE INFLUENCE OF BENT AXIAL PISTON PUMPS’ CONTROL SYSTEMS’ GAINS ON HYDRAULIC PIPES STABILITY

Due to their superior performance, high specific power, and flexible operating adaptability, axial piston pumps are widely used in both industrial and mobile applications. In this type of pumps, the pump flow is designed to meets load requirements by the aid of control unit. A pressure transducer senses the load and feeds this information to the control system’s arithmetic unit which computes the required piston stroke to generate the required flow rate. The existing pump’s control system consists of double negative feedback control structure. The inner loop controls the proportional hydraulic valve position; while the outer loop controls the swash plate angle. In order to reduce the pump production cost, simplify its design, and improve its performance; the control system can be redesign and re-constructed to meet the desirable performance. The objective of this paper is to propose a novel single PID controller and investigate the pump overall performance including the hydraulic system smoothness (pipe vibration) and improving its response to load requirement. The results are simulated and then validated experimentally, which show promising results, and the new strategy can be implemented on the axial piston pumps successfully.