Investigation Into The Aircraft Hydraulic Platform With Multi-pumps And Systems

The aircraft hydraulic system test is often performed on one of these three levels: component-level, principle-level and system-level. The principle-level test of aircraft hydraulic system is carried out succeeding the component-level test and prior to the system-level test (known as the iron bird test), in order to verify the principle of the hydraulic system. The aircraft hydraulic platform with Multi-pumps and systems, based on the technical requirement of the aircraft hydraulic system principle test, was developed to verify the hydraulic system of an airliner and could test the hydraulic system under three different pressure levels. The research of this paper involves the following contents:Chapter 1:aircraft hydraulic system structure and future development tendency was introduced. Researches on aircraft hydraulic system principle test home and abroad were summarized. Significance and goal of the project were given. The research contents and critical technology were briefly illuminated.Chapter 2:the overall goals of the test platform were proposed and capacity parameters were listed. The functional subsystems of test platform were discussed: hydraulic, electrical, computer assisting measurement system. Hydraulic system including pump module, load simulation module, bootstrap reservoir module, cooling module, piping vibration module was developed and designed. Then overall hydraulic circuit was integrated using the function modules, and key components'model types were calculated and selected. Finally 3D model was built.Chapter 3:hydraulic schematic simulation model was built, with parameters set according to the actual of hydraulic components selected, and the hydraulic system simulation of test platform was conducted on the pressure level of 3000psi in AMESim to analyze and verify the performance of the hydraulic system.Chapter 4:requirements of the electrical module, control module and data acquisition module of the test platform were analyzed and developed. The power module with total power of 240kW was developed, the control module constituted by IPC and PLC could control the whole test platform accurately-data acquisition module based on PXI bus and virtual instrument was constituted by PXI-6225 data acquisition card, PXI wiring-box, IPC, and software, and could acquire and record signals from 50 channels. Finally, Application software based on LabVIEW was discussed.Chapter 5:the test platform was built, and some experiments such as pressure test, the pump flow/pressure test, load simulation test and bootstrap reservoir test were carried out. The results show that the test platform is full compliance with the design requirements and can be used for further research.Chapter 6:the paper was summarized and future prospect was made.