Aero-engine fuel regulator back pressure simulation device
A fuel regulator and aero-engine technology, which is used in engine testing, simulators, measuring devices, etc., can solve problems such as the lack of automatic back pressure adjustment and the inability to use the aero-engine control system for real-time simulation tests.
Active Publication Date: 2021-04-20
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
Method used
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Embodiment 1
[0040]The back pressure conversion module operates in the NI PXI industrial computer, and the combustion chamber pressure calculated by the aeroengine real-time model, as well as the relationship between the combustion chamber pressure and the fuel regulator back pressure, and realizes the calculation of the fuel regulator back pressure. In the present embodiment, the engine model is a two-axis turntile engine component stage model, the engine combustion chamber pressure and the fuel regulator back pressure establishment in steady state work point QFM, D = 30.728L / min, ΔP,D= 7.74bar, seeking α = 8.216 × 10-3, Select m = 1 / 8, you can get the correspondence between the two.
[0041]The back pressure controller operates in the NI PXI industrial computer, obtains a certain fuel regulator back pressure, the theoretical back pressure simulation valve position, and further correct the position control command through the PI controller. The feedforward interpolation table is selected asimage...
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Abstract
An aero-engine fuel regulator back pressure simulation device comprises 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 converts the back pressure of the fuel regulator according to the combustion chamber pressure calculated by the aero-engine real-time model to serve as a back pressure controller instruction; the back pressure controller calculates the instruction position / opening degree of the back pressure valve according to the outlet oil pressure, collected by the pressure sensor, of the fuel regulator; the back pressure valve position controller calculates a motor driving signal according to the instruction position and the back pressure valve actual position collected by the PLCD sensor, the opening degree of the back pressure valve is adjusted, and then the outlet oil pressure of the fuel regulator is adjusted. Simulation of the real working environment of the fuel regulator is achieved, the simulation confidence coefficient of aero-engine fuel control is improved, and the device can be applied to the fields of aero-engine control system design and development, aero-engine fuel regulator design and development, aero-engine characteristic analysis, aero-engine tests and the like.
Description
Technical field[0001]The present invention relates to an aerospace engine fuel regulator back pressure simulation device belongs to the technical field of aerospace engine test.Background technique[0002]The fuel regulator is the most important actuator of the aerospace engine control system, which adjusts the fuel flow of the combustion chamber based on flight requirements, flight environments and other related factors, and its performance has extremely important impact on engine control systems and engine overall performance. Therefore, it is necessary to take into account the fuel regulator characteristics to verify the accuracy of fuel regulators in the design of aerospace engine control system design and any other related design.[0003]In the actual fuel system in the aerospace engine, the fuel is output via the fuel regulator, and then enter the combustion chamber through the fuel dispenser and nozzle. Therefore, the back pressure of the fuel regulator is equal to the back press...
Claims
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Login to View More 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