A Modeling Method for Uncertain Fuzzy Dynamic Model of Aeroengine with Time Delay

An aero-engine and uncertainty technology, which is used in the modeling of aero-engine dynamic models and the modeling of uncertain fuzzy dynamic models of aero-engines with time delay. Model dynamic information, improve calculation speed and real-time performance, and avoid the effect of a large number of iterative solution processes

Active Publication Date: 2021-06-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0007] Therefore, it is necessary to invent a new aero-engine modeling method to address the problems and requirements of solving complexity, real-time, accuracy, uncertainty and time-lag in the above-mentioned aero-engine modeling. To improve the real-time performance and scope of application of the aero-engine model

Method used

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  • A Modeling Method for Uncertain Fuzzy Dynamic Model of Aeroengine with Time Delay
  • A Modeling Method for Uncertain Fuzzy Dynamic Model of Aeroengine with Time Delay
  • A Modeling Method for Uncertain Fuzzy Dynamic Model of Aeroengine with Time Delay

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Embodiment

[0043] The concrete realization of this embodiment is described in detail below:

[0044] (1) Establish engine multi-dynamic component-level model

[0045] For a twin-shaft turbofan engine with afterburner, the cavity to be considered is selected from the combustion chamber, the high-low pressure turbine room, the connotation nozzle and the afterburner chamber, etc. The components that do not consider the cavity are the intake duct, fan, compressor, Outer bypass, high pressure turbine, low pressure turbine, mixing chamber and tailpipe.

[0046] Establish a component-level model that considers the components of the cavity, consider the volume effect of the cavity (the accumulation effect of flow and energy) after the component-level model, establish a volume dynamics model for the corresponding cavity, and realize the correction of the temperature and pressure of the component. Thus, a volume dynamics model considering the cavity parts is established.

[0047] Select the comp...

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Abstract

The invention discloses an uncertain fuzzy dynamic model modeling method with time delay of an aero-engine, comprising: 1) establishing an engine multi-dynamic component-level model; 2) establishing an engine state variable model; 3) establishing a nominal system model ; 4) Establish a fuzzy dynamic model of the engine based on fuzzy theory. The invention adopts rotor dynamics, volume dynamics and heat transfer methods to establish a nonlinear component-level model of an aero-engine. The component-level model modeling method increases the dynamic information of the model, avoids a large number of iterative solution processes, and improves the calculation speed and efficiency of the model. Real-time; the genetic algorithm is used to correct the design points and non-design points of the nonlinear component-level model of the aero-engine, and the genetic algorithm is used to correct the flow and efficiency correction coefficients of the aero-engine rotor components, so that the relative error of the design point parameters is kept at 1 %, the relative error of non-design point parameters is kept within 2%, and the temperature range is within 10K.

Description

technical field [0001] The invention relates to an aero-engine dynamic model modeling method, in particular to an aero-engine uncertain fuzzy dynamic model modeling method with time delay, belonging to the field of aero-engine control. Background technique [0002] The network aeroengine is a thermal power device that is difficult to develop, takes a long time, and is expensive. The working conditions are harsh and changeable, the mechanism is complex, and the risk of the experiment is high. Structural strength and vibration, electronic technology, computer control technology, materials science, precision manufacturing technology and comprehensive testing technology and many other disciplines. In the process of engine development, the use of computer simulation technology makes it possible to develop reliable aero-engine devices in a short period of time. The aeroengine model is the core of the aeroengine numerical simulation technology and the basis of the control system d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 潘慕绚陈强龙周文祥黄金泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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