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A Model-Based Method for Unbalance Identification of Asymmetric Rotor Bearing System

An identification method, asymmetric technology, applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc.

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the present invention can solve the problem of obtaining responses of all degrees of freedom with a limited number of degrees of freedom; it can eliminate errors caused by modal expansion and other reasons, and improve recognition accuracy

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  • A Model-Based Method for Unbalance Identification of Asymmetric Rotor Bearing System
  • A Model-Based Method for Unbalance Identification of Asymmetric Rotor Bearing System
  • A Model-Based Method for Unbalance Identification of Asymmetric Rotor Bearing System

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Embodiment Construction

[0073] In order to make the purpose, technical effects and technical solutions of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments It is a part of the embodiment of the present invention. Based on the disclosed embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall all fall within the protection scope of the present invention.

[0074] A model-based method for identifying unbalance in an asymmetric rotor bearing system according to an embodiment of the present invention includes the following steps:

[0075] 1) Establish the kinematic equation model of the asymmetric rotor bearing system;

[0076] 2) Model correction for the asymmetrical rotor bearing...

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Abstract

The invention discloses a model-based method for identifying the unbalance of an asymmetric rotor bearing system, which includes: 1) modeling of the kinematic equation of the asymmetric rotor bearing system; 2) model correction; 3) complex mode reduction; 4) transient state Response solution; 5) modal expansion method for response; 6) improved equivalent load minimization method for fault identification; the present invention introduces experimental data for model correction of asymmetric rotor bearing system; adopts complex mode reduction method for degrees of freedom Reduction; the modal expansion method is used to obtain all the degrees of freedom responses from the limited degrees of freedom responses; the improved equivalent load minimization method is used to identify the equivalent loads of the asymmetric rotor bearing system. The invention can greatly reduce calculation time, save computer resources, improve fault identification accuracy and facilitate engineering application.

Description

technical field [0001] The invention belongs to the technical field of vibration fault diagnosis and control of a rotating machinery system, and in particular relates to a model-based identification method for an unbalanced amount of an asymmetric rotor bearing system. Background technique [0002] In actual industrial production, there are a large class of rotating machines with asymmetric rotors, such as generators, motors and fans. From a strict definition, a completely symmetrical rotor system should have both an axisymmetric rotor and an isotropic support structure, which is a very stringent condition for most rotating machines. In order to achieve specific functions, the actual rotor structure often needs to install corresponding working parts on it, such as an engine rotor with wire slots, etc., so that the structure does not have axial symmetry. It can be said that asymmetry is widespread in rotating machinery. and unavoidable factors. [0003] The asymmetry of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 谢永慧孙磊郑召利张荻
Owner XI AN JIAOTONG UNIV