Session: 01-02: Pumps and Motors 1: Piston and Membrane Machines

Paper Number: 140206

140206 - Development of an Intelligent Electric Motor-Driven Pump With High Energy Efficiency 

Abstract: 

Most current aircraft hydraulic systems provide hydraulic energy to different actuators through a centralized pump source. The engine-driven pump (EDP) is the core component of the traditional centralized pump source. EDPs are mostly axial piston pumps and adopt a pressure compensated variable displacement (PCVD) configuration, and their outlet pressure is set to a constant value according to the load requirements. However, maintaining a high pressure will cause huge power loss when the aircraft actuator has low pressure requirements, leading to problems such as reduced efficiency and severe heating. Actually, during an entire flight of the aircraft, the vast majority of the complete flight profile does not require the highest outlet pressure. An intelligent electric motor-driven pump (EMP) configuration is proposed and its prototype is developed in this paper. Its output power can match the load power, effectively improving the efficiency of the aircraft's pump source and reducing heat generation. The intelligent EMP consists of a motor and an axial piston pump. The axial piston pump is integrated with a displacement sensor to monitor the displacement of the swashplate. It uses a servo valve to control the swashplate, thereby controlling the outlet pressure of the axial piston pump. Furthermore, one pressure and flow double closed-loop control strategy for the intelligent EMP is proposed, it use the flow closed-loop as the inner loop of the pressure closed-loop to improve the control accuracy and response of the outlet pressure. Finally, centralized pump source models with intelligent EMP and PCVD configurations are established, respectively, and the two pump sources are simulated and compared using flight profile load spectrum. Based on the actual pump source test platform, experimental comparison tests are conducted on the prototypes of the two types of pump sources. The results show that compared with the centralized pump source with PCVD configuration, the energy efficiency of the centralized pump source with intelligent EMP configuration is significantly improved by 21.3% and 20.8% under simulation and experimental conditions, respectively.

Presenting Author: Bo Yang Zhejiang Uinversity

Presenting Author Biography: Bo Yang received the B.S. and M.S. degrees from Zhejiang University in 2012 and 2015, respectively. He is currently working toward the Ph.D degree in mechatronic engineering at the College of Mechanical Engineering, Zhejiang University, Hangzhou, China. His research interests include electro-hydraulic servo control, hydraulic components, and robot hydraulic joint.

Authors:

Bo Yang Zhejiang Uinversity
Hong Pan Zhejiang University
Yijie Lu Zhejiang University
Zhenfei Ling Zhejiang University
Haoyi Jiang Zhejiang University
Hao Liu Zhejiang University
Xiaoping Ouyang Zhejiang University
Huayong Yang Zhejiang University