Abstract
The electrified pump-controlled hydraulics receives increasing attention from both industry and academia. Its combined advantages of hydraulic and electric actuators result in an expanding application in heavy-duty actuation. One example of such actuation application is the boom. Despite the diverse achievements from academia, the commercial application has not started yet. This is partially caused by the absence of the auxiliary functions of the conventional hydraulic actuation, e.g. thermal management, filtration, and maintenance convenience, in proposed academic solutions. This paper proposes a new design of the pump-controlled actuation solution for heavy-duty booms, which takes both the primary and auxiliary function requirements into consideration. Then, the proposed system is modeled and simulated using a crane study case, which requires 50 kW power for moving each axis. The primary functions, e.g. the control performance, the energy efficiency, and the auxiliary functions are both analyzed. The control methods are proposed for supporting the upper-level control modes. A conventional load sensing actuation system is also simulated as a comparison. The simulation results demonstrated around 40–70 % energy-saving advantages and comparable auxiliary functions of the proposed system over the conventional system. The achieved results prove the applicability of the proposed system and promote the application of the pump-controlled actuation in heavy-duty booms.
