| Popis: |
Generally, in hydraulic systems, the performance, high specific power and compliant functional characteristics make swash plate pumps suitable for most of the fluid power and hydraulic applications. Swash plate pump is a variable displacement pump as the flow rate is controlled and adjusted according to the load pressure reading. The pressure transducer senses the value of the pressure at the load side and sends it to the logic unit to determine what is the required piston stroke needed to generate the required pressure to match the load pressure. For this purpose, the control unit is equipped with two control loops. The inner controls the spool proportional motion, and the outer to control the swash plate inclination angle which determines the stroke length. The inclination angle is limited by two values zero and 15 deg. Having one loop to control only the inclination angle makes the pump production cost less, simplifies the structure of the pump, and improves the pump overall performance. Hence, the control unit needs to be redesigned and reconstructed to meet the required performance. This paper aims to investigate the effect of a single PID controller gains on the hydraulic system noise levels. In this study, the single proposed PID controlled will be compared with another single PD controller, and the noise levels will be considered as comparison parameters. The results are obtained theoretically and validated experimentally. The experimental results have shown the ability to apply the proposed PID single controller for this kind of pumps. |
