An aeroengine fuel regulator back pressure simulation device
A technology of fuel regulator and aero-engine, which is applied in the direction of engine testing, simulators, measuring devices, etc., and can solve problems such as lack of automatic back pressure adjustment and inability to use real-time simulation tests of aero-engine control systems to achieve engine fuel control Accurate, confidence-boosting effects
Active Publication Date: 2022-04-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
This method needs to rely on the monitoring pressure gauge to judge that the internal pressure of the container is equal to the set back pressure value, and does not have the function of automatic back pressure adjustment, so it cannot be used in the real-time simulation test of the aero-engine control system
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Embodiment 1
[0040] The back pressure conversion module runs in the NI PXI industrial computer, and realizes the calculation of the back pressure of the fuel regulator through the combustion chamber pressure calculated by the real-time model of the aeroengine, and the relationship between the combustion chamber pressure and the back pressure of the fuel regulator. In this implementation example, the engine model is a component-level model of a twin-shaft turbofan engine, and the relationship between the combustion chamber pressure of the engine and the back pressure of the fuel regulator is established at the steady-state operating point Q fm,D =30.728L / min, Δp ,D =7.74bar, find α=8.216×10 -3 , select m=1 / 8, and the corresponding relationship between the two can be obtained.
[0041] The back pressure controller runs in the NI PXI industrial computer. Through the pre-calibrated feed-forward interpolation table, the position of the theoretical back pressure simulation valve under a certain...
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A back pressure simulation device for an aero-engine fuel regulator, comprising a back pressure valve, a back pressure valve position controller, a back pressure controller and a back pressure conversion module; the back pressure conversion module calculates the combustion chamber pressure according to the real-time model of the aero engine, Convert the back pressure of the fuel regulator as the command of the back pressure controller; the back pressure controller combines the outlet oil pressure of the fuel regulator collected by the pressure sensor to calculate the command position / opening of the back pressure valve; the position controller of the back pressure valve according to the The command position and the actual position of the back pressure valve collected by the PLCD sensor calculate the motor drive signal, adjust the opening of the back pressure valve, and then adjust the outlet oil pressure of the fuel regulator. Realize the simulation of the real working environment of the fuel regulator, improve the simulation confidence of aero-engine fuel control, and can be applied to the design and development of aero-engine control systems, aero-engine fuel regulator design and development, aero-engine characteristic analysis, aero-engine tests and other fields.
Description
technical field [0001] The invention relates to a back pressure simulation device of an aero-engine fuel regulator, belonging to the technical field of aero-engine testing. Background technique [0002] The fuel regulator is the most important actuator of the aero engine control system. It adjusts the fuel flow to the combustion chamber according to flight requirements, flight environment and other related factors. Its performance has an extremely important impact on the engine control system and the overall performance of the engine. Therefore, it is necessary to take into account the fuel regulator characteristics to verify the accuracy of the fuel flow control when conducting semi-physical simulation tests of the design of the aircraft engine control system and any other related design. [0003] In the actual fuel system of an aero engine, the fuel is output through the fuel regulator, and then enters the combustion chamber through the fuel distributor and nozzle. Theref...
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IPC IPC(8): G05B17/02G01M15/02
Inventor 袁元李凌蔚张兴龙张家铭张天宏黄向华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS