Journal of Astronautics ›› 2013, Vol. 34 ›› Issue (12): 1628-1633.doi: 10.3873/j.issn.1000-1328.2013.12.013

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Compass Error Compensation Based on Adaptive Differential  Evolution and BP Network

YUE Hai bo,  ZHANG Shu dong, SHI Zhi ru,  XI Hai tao   

  1. Research Institute, Shenyang Aerospace Xinle Co Ltd,Shenyang 110034,China
  • Received:2013-03-05 Revised:2013-07-20 Online:2013-12-15 Published:2013-12-25

Abstract:

To improve the acuuracy of heading angle measured by electronic compass, a new error compensation method is proposed based on adaptive differential evolution algorithm and BP neural network. In the method, the 3 layer BP neural network is used to model heading angle error, and adaptive differential evolution algorithm is adopted to train the weights of network, thus obtaining a more exact error model, and compensating the heading angle error measured by electronic compass. Compared with other compensation methods such as 8 position least squares, BP neural network, differential evolution algorithm for optimizing BP neural network, and so on, its error compensation accuracy is significantly improved, the method has strong global optimization ability, great convergence rate, good stability, and so on. The experimental results show that after compensation, the error range of heading angle is decreased from -16°~30.7° to -0.22° ~0.2°, which satisfies the needs of higher accuracy navigation systems.

Key words: Electronic compass, Error compensation, Adaptive differential evolution algorithm, BP neural network, Least squares

CLC Number: