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Aero-engine time lag-containing non-determinacy fuzzy dynamic model modeling method

An aero-engine and uncertainty technology, which is applied in the modeling of aero-engine dynamic models and uncertain fuzzy dynamic model modeling of aero-engines with time-delay, can solve problems such as complexity and uncertainty, and achieve increased The effect of model dynamic information, improving calculation speed and real-time performance, and avoiding a large number of iterative solution processes

Active Publication Date: 2018-11-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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  • Aero-engine time lag-containing non-determinacy fuzzy dynamic model modeling method
  • Aero-engine time lag-containing non-determinacy fuzzy dynamic model modeling method
  • Aero-engine time lag-containing non-determinacy fuzzy dynamic model modeling method

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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 aero-engine time lag-containing non-determinacy fuzzy dynamic model modeling method comprising the following steps: 1, building an engine multi-dynamics component-level model; 2, building an engine state variable model; 3, building a nominal system model; 4, building an engine fuzzy dynamic model based on a fuzzy theory. The method employs rotordynamics, volume dynamicsand heat transfer theory methods to build an aero-engine nonlinear component-level model; the component-level model modeling method adds the model dynamic information, avoids massive iteration solvingprocess, and improves the model calculation speed and timeliness; the method employs a heredity algorithm to modify design points and non-design points of the aero-engine nonlinear component-level model, and employs the heredity algorithm to modify the aero-engine rotor component flow and an efficiency modification factor, so the design point parameter relative error is kept within 1%, the non-design point parameter relative error is kept within 2%, and the temperature change scope 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 Applications(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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