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Journal of Projectiles, Rockets, Missiles and Guidance >

2025 , Vol. 45 >Issue 6: 1044 - 1050

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.06.011

Academic article

Guided Projectile Roll Angle Identification Algorithm based on Rotation Modulation Method

  • CHEN Kai , 1 ,
  • HUANG Peng 2 ,
  • JIAO Yong 3 ,
  • ZENG Chengzhi 1 ,
  • LI Zhenhao 1 ,
  • YANG Tao 1
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  • 1 School of Astronautics,Northwestern Polytechnical University,Xi’an 710072,Shaanxi,China
  • 2 Northwest Industries Group Corporation,Xi’an 710043,Shaanxi,China
  • 3 Xi’an Aerospace Propulsion Institute,Xi’an 710025,Shaanxi,China

Received date: 2024-09-27

  Online published: 2026-01-24

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Abstract

Hypervelocity guided projectiles are survived the high-g loads within the initial launch and required in-flight alignment after power on,the measurement accuracy of MEMS IMU will decrease after high-g load shocks.In order to solve the problem of low accuracy of in-flight alignment,on the premise of not increasing extra mechanism on the projectile,the idea of rotational modulation is presented to realize the self-compensation of MEMS IMU.The method of improving the accuracy of in-flight alignment through the rotation of the projectile itself in the air is proposed.The roll angle identification algorithm based on the rotational modulation method is derived under the single-axis (roll axis) rotation of the projectile.Based on the established ballistic model,the Monte Carlo simulations are carried out using trajectories with different roll angles,different launching azimuths.The simulation results show that the accuracy of roll angle identification is within 3°.Compared with the traditional roll angle identification method,the accuracy of the rotation modulation method is demonstrated.

Key words： Hypervelocity guided projectile; Launch-centered earth-fixed frame; Rotation modulation method; Roll angle identification; In-flight alignment

Cite this article

CHEN Kai , HUANG Peng , JIAO Yong , ZENG Chengzhi , LI Zhenhao , YANG Tao . Guided Projectile Roll Angle Identification Algorithm based on Rotation Modulation Method[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2025 , 45(6) : 1044 -1050 . DOI: 10.15892/j.cnki.djzdxb.2025.06.011

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