Modeling method of transient process of aero-engine

An aero-engine and transition process technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that the transition process cannot be expressed by a model, and achieve good dynamic performance, wide applicability, and high precision Effect

Active Publication Date: 2017-10-10
DALIAN UNIV OF TECH
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the aero-engine controller in the prior art can only be designed for a mathematical model near a certain steady state, and ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modeling method of transient process of aero-engine
  • Modeling method of transient process of aero-engine
  • Modeling method of transient process of aero-engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Below in conjunction with accompanying drawing, the present invention will be further described, and the research object of the present invention is a turbofan engine for a small unmanned aerial vehicle, and its transition process model is established as follows figure 1 As shown in the flowchart, the detailed design steps are as follows:

[0038] Step 1: Generate a set of sinusoidal excitation signal sequences {Δu} with amplitudes within [-1, 1] consisting of superimposed sinusoidal signals with different amplitudes and phases within 1-80Hz, where the signal used in the sample like figure 2 shown.

[0039] Step 2 to get the given amount of oil W fsi The relative conversion speed sequence of the high-pressure turbine under {y i1} and low-pressure turbine relative conversion speed sequence {y i2}, i=1,2,3...n

[0040] 2.1) Input a given amount of fuel W to the aero-engine fs1 , when the relative conversion speed of the high-pressure turbine of the aero-engine reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a modeling method of the transient process of an aero-engine, and belongs to the field of modeling and simulating of the transient state of the aero-engine. By distinguishing a dynamic model of the aero-engine in different steady states and combining the dynamic model with a corresponding steady-state model, the transient process of the aero-engine is presented as a dynamic variable parameter model through methods of polynomial fitting and a least squares support vector machine. The approximate transient process of multiple discrete steady state points is improved, the dynamic characteristics are better, and the situation that by means of an existing method, error accumulation exists when modeling of the transient state is conducted through output accumulation is improved; meanwhile, single input multiple output is modeling through the method, universality is wider, modeling can be promoted to modeling of the transient process of multiple input multiple output aero-engine through proper adjustment.

Description

technical field [0001] The invention relates to the field of aero-engine transition state modeling and simulation, in particular to a method for establishing a mathematical model for aero-engine transition state control and display. Background technique [0002] In the field of aero-engine control, aero-engine transition state modeling has always been a difficult problem to solve. Establishing a mathematical model for the transition state can, on the one hand, make the control method used in the aero-engine transition state more targeted, and on the other hand can effectively Therefore, the present invention has great significance for the transition state modeling of the aero-engine. [0003] The literature shows that the existing aero-engine modeling is mostly aimed at modeling the steady-state operating point, such as the steady-state point pumping method that can only be designed for the white-box model. This type of method modeling is based on nonlinear calculation progr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/15
Inventor 刘佟建孙希明马艳华汪锐
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap