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Acta Armamentarii ›› 2025, Vol. 46 ›› Issue (9): 240826-.doi: 10.12382/bgxb.2024.0826

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Computation and Analysis of Assembly Position and Orientation Deviations for a Gyroscopic Pendulum Accelerometer Considering Flexible Surface Contact

ZHANG Jian1, LIU Jianhua1,2, ZHANG Guorui1, XIA Huanxiong1,2,*(), ZHANG Fuli1, SHEN Hongda1   

  1. 1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
    2 Tangshan Research Institute, Beijing Institute of Technology, Tangshan 063015, Hebei, China
  • Received:2024-09-11 Online:2025-09-24
  • Contact: XIA Huanxiong

Abstract:

To precisely control the assembly position-orientation accuracy of gyroscopic pendulum accelerometers at the design stage,this paper proposes an computing method of position and orientation deviations (PODs) considering the flexible contact behaviors of non-ideal mating surfaces.A mathematical model based on multi-degree-of5freedom force equilibrium conditions is established by adopting an iterative trial adjustment strategy for position and orientation,and a non-dominated sorting genetic algorithm Ⅲ (NSGA-Ⅲ) framework is developed for solving the proposed model.The proposed method is comparaed with the classical small displacement torsor (SDT) method and the mainstream iterative closest point (ICP) algorithm,and its effectiveness and accuracy are validated through a case study of coaxial assembly accuracy prediction for gyroscopic pendulum accelerometers.Results indicate that the proposed method can be used to improve the predicting accuracy of assembly position-orientation,offering technical support for ensuring the precision performance in high-end inertial nvigation systems.

Key words: flexible contact behavior, gyroscopic pendulum accelerometer, assembly accuracy prediction, position and orientation deviations, non-ideal surface, non-dominated sorting genetic algorithm III

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