Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (12): 2867-2874.doi: 10.3969/j.issn.1001-506X.2020.12.24

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Forecasting method of the error coefficient for SIMU based on belief rule base

Xinhao DONG1(), Zhijie ZHOU1,2(), Youmin ZHANG2(), Zhichao FENG1(), You CAO1()   

  1. 1. Missile Engineering College, Rocket Force University of Engineering, Xi'an 710025 China
    2. Department of Information and Control Engineering, Xi'an University of Technology, Xi'an 710048 China
  • Received:2020-03-24 Online:2020-12-01 Published:2020-11-27

Abstract:

The strapdown inertial measurement unit (SIMU) is the core of such large aircraft control systems as the rocket. Its structure is quite complicated, and the available error parameter samples are relatively few. As a kind of expert system, the belief rule base (BRB) can effectively address small sample information under uncertainty by aggregating monitoring data and expert knowledge. Thus, a BRB-based forecasting method for the error coefficient of the SIMU prediction is proposed. In order to make full use of the input information, the information transformation accuracy is improved and the information loss is reduced during the index transformation process, a new calculation method of matching degrees is proposed according to the characteristics of the impulse output of SIMU, which can improve the accuracy of the model. Finally, the effectiveness of the proposed method is verified by an example of a type of SIMU accelerometer.

Key words: strapdown inertial measurement unit (SIMU), error coefficient, belief rule base (BRB), expert knowledge, matching degree

CLC Number: 

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