Automatic displacement controls in competition

The paper reports upon a series of simulation experiments carried out on variable displacement axial piston pumps equipped with pressure and flow compensators, within a standardized environment. Five different schemes of the swashplate control circuit are introduced and tested by forcing the pump load and flow inputs. The relevant responses are discussed and estimated by steady state and dynamic figures of merit. On this basis, the control schemes are compared, and their relative merits and drawbacks enlightened.