Volume 28 Issue 2
Feb.  2013
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YANG Zhou, JING Bo, ZHANG Jie. Variable precision rough set decision-making method for health assessment of aero-engine[J]. Journal of Aerospace Power, 2013, 28(2): 283-289.
Citation: YANG Zhou, JING Bo, ZHANG Jie. Variable precision rough set decision-making method for health assessment of aero-engine[J]. Journal of Aerospace Power, 2013, 28(2): 283-289.

Variable precision rough set decision-making method for health assessment of aero-engine

  • Received Date: 2012-03-22
  • Publish Date: 2013-02-28
  • In order to solve the problems of variable working condition,non-linear and small sub-sample in the process of aero-engine health assessment,a variable precision rough set decision-making method based on the similarity measurement was proposed.Firstly,the principle and method of choosing value was given,and the decision-making rules were extracted.Secondly,the method of calculating attributes' relative importance based on cross-entropy was proposed and attributes' objective weights were given.Taking the expert experience and working experience into account,overall weights were formed.Finally,a weighted similarity measurement based on the overall weight of attributes was developed.By comparing the similarity degrees between the current object and other objects from the reduced decision-making system,the decision results were given.Simulation results show that the method is effective to aero-engine's health assessment with the help of expertise and running environment.In addition,the proposed method can be applied to other regions.

     

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