Abstract
The objective of this paper is to design a pump that can match its delivery pressure to the aircraft load. Axial piston pumps used in airborne hydraulic systems are required to work in a constant pressure mode setting based on the highest pressure required by the aircraft load. However, the time using the highest pressure working mode is very short, which leads to a lot of overflow lose. This study is motivated by this fact. Pressure continuous regulation electrohydraulic proportional axial piston pump is realized by combining a dual-pressure piston pump with electro-hydraulic proportional technology, realizing the match between the delivery pressure of the pump and the aircraft load. The mathematical model is established and its dynamic characteristics are analyzed. The control methods such as a proportional integral derivative (PID) control method, linear quadratic regulator (LQR) based on a feedback linearization method and a backstepping sliding control method are designed for this nonlinear system. It can be seen from the result of simulation experiments that the requirements of pressure control with a pump are reached and the capacity of resisting disturbance of the system is strong.
Highlights
The delivery pressure of the axial piston pump used in an airborne hydraulic system shown in Figure 1 must be set according to the highest pressure required by the aircraft load
A contribution of this work lies in system modeling in terms of freebody diagrams of the components of theof piston group together the proportional and the with simulation results of electromagnet
The proportional integral derivative (PID) control method, linear quadratic regulator (LQR) based on feedback linearization method and backstepping sliding conclusions: control were control theregulation system
Summary
The delivery pressure of the axial piston pump used in an airborne hydraulic system shown in Figure 1 must be set according to the highest pressure required by the aircraft load. Koivumaki [21] proposed for the first time not using any linearization or order reduction, and an adaptive and model-based discharge pressure control design for the variable displacement axial piston pumps (VDAPPs), whose dynamical behaviors are highly nonlinear and. Koivumaki [21] proposed for the first time not using any linearization or order reduction, and an adaptive and model-based discharge pressure control design for the variable displacement axial piston pumps (VDAPPs), whose dynamical behaviors are highly nonlinear and described by a fourth-order differential equation. The control methods of pressure continuous regulation electrohydraulic proportional aviation axial piston pump(EHPAAPP) are considered to achieve the objectives of the following aspects: the response time of the electro-hydraulic proportional variable pump, which is defined as not exceeding 0.05 s during the process of pressure adjustment, the instantaneous peak pressure not exceeding 135% of the rated outlet pressure, the response time is not more than 0.05 s, and the stability time does not exceed 1 s.
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