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Journal of Projectiles, Rockets, Missiles and Guidance >

2024 , Vol. 44 >Issue 3: 1 - 10

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.03.001

Analysis of Posture and Tension of Guidance Optical Fiber in High Speed Release

  • LI Minghang ,
  • ZHANG Zhuo ,
  • TANG Feng ,
  • XUE Yaohui ,
  • WANG Jiaxin ,
  • NIU Dashan
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  • Xi’an Modern Control Technology Research Institute,Xi’an 710065,Shaanxi,China

Received date: 2023-01-10

  Online published: 2024-12-28

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Abstract

As the signal transmission medium of the guided weapon, if the optical fiber breaks, the missile will lose control and cannot fly. In order to evaluate the reliability and tensile strength of optical fiber efficiently, ground simulated release experiment of optical fiber is of great significance to test the reliability of optical fiber release because of the high cost and long period of live missile flight. In order to solve the problem of disconnection in ground release of guided optical fiber, the dynamic equation of optical fiber motion is derived in rotating coordinate system according to the motion characteristics of optical fiber release. Based on the fact that most of the release time of optical fiber is at a constant speed, the influence of time variation on the dynamic equation is ignored, and the stress and spatial distribution of optical fiber under the "quasi-steady state" condition are analyzed emphatically. The simplified differential equation of fiber attitude is solved by numerical method. The motion attitude of the optical fiber in experiment was captured by a high-speed camera and compared with the theoretical calculation results. It is found that when the optical fiber just breaks free of the package for movement, the theoretical calculation result is quite different from the actual optical fiber motion attitude. After the optical fiber gradually moves away from the package, the theoretical calculation results are gradually consistent with the actual motion attitude of the optical fiber. Finally, the effects of the initial direction vector, tension at the receiving point, the distance between the releasing point and the receiving point, and the releasing speed on the distribution of optical fiber attitude and tension were investigated. The motion attitude and force of the optical fiber are obtained by using the dynamics equation of optical fiber release, which provides a theoretical basis for the analysis of optical fiber release fracture accident and the improvement of optical fiber release reliability.

Key words： guidance optical fiber; ground release; tension distribution; space posture

Cite this article

LI Minghang , ZHANG Zhuo , TANG Feng , XUE Yaohui , WANG Jiaxin , NIU Dashan . Analysis of Posture and Tension of Guidance Optical Fiber in High Speed Release[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2024 , 44(3) : 1 -10 . DOI: 10.15892/j.cnki.djzdxb.2024.03.001

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