Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (3): 630-634.doi: 10.3969/j.issn.1001-506X.2018.03.22

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Mechanism analysis of dynamic environment in apparatus cabin for strapdown inertial navigation system external lever arm effect compensation

YANG Qi1,2, LIU Xinxue2, MENG Shaofei2, LIU Qingbao1   

  1. 1.Sergeant College, The Rocket Force University of Engineering, Qingzhou 262500, China; 2. Primary Command College, The Rocket Force University of Engineering, Xi’an 710025, China
  • Online:2018-02-26 Published:2018-02-24

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Abstract:

The influence of complex dynamic environment in apparatus cabin for strapdown inertial navigation system (SINS) is one of the technical problems to improve navigation accuracy. The strapdown inertial system is equivalent to Euler-beam hybrid system, which is considered under the hypothesis premise of only transverse vibration and linear system. The system motion is described by dynamic differential equations, and find out the root cause of external lever arm effect incomplete compensation is the external lever arm changed with the random response under dynamic environment. The digital characteristics of the random variable and the dynamic external lever arm effect expression is derived according to the traditional lever arm effect computing method. Finally, the influence of lever arm effect incomplete compensation on navigation solution is analyzed with the flight simulation.

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