摘要
为了验证复杂振动环境下惯性导航系统的可靠性和准确性,采用SolidWorks建立惯性导航系统的三维模型和有限元模型,基于各部件对结构刚度的影响大小,去除结构体上细小特征,简化结构,以此降低惯性导航系统对振动和冲击环境的敏感性。通过分析系统内部关键元器件及组件的固有频率、变形量及复杂振动环境的响应可知,惯导系统的局部频率偏低,但结构主体部分的固有频率高于1 000 Hz,结构整体的刚度较大;从结构关键部位结构最大加速度响应总均方根和加速度响应放大倍率可知,在复杂随机振动环境下,简化的惯性导航结构可以保证其可靠性和精度。
In order to verify the reliability and accuracy of inertial navigation systems(INS)in complex vibration environment,a three-dimensional model and a finite element model of INS are established using SolidWorks.Based on the influence of each component on the structural rigidity,the small features on the structure are removed and the structure is simplified,thereby the sensitivity of the INS to vibration and shock environments is reduced.Simulation analysis on the natural frequencies,deformations,and response of complex vibration environments of key components and components inside the system show that the frequency of the local INS is low while the main part of the natural frequency is higher than 1000 Hz,and the overall stiffness of the structure is large.The maximum total rms acceleration response and acceleration response magnification from the key parts of the structure indicate that inertial navigation structures can ensure its reliability and accuracy in complex random vibration environment.
作者
刘颖
董志娟
于浩
杨媛
LIU Ying;DONG Zhijuan;YU Hao;YANG Yuan(School of Automation,Xi'an University of Posts and Telecommunications,Xi'an 710121,China;Jilin Jun Communication Design Institute CO.,LTD,Jilin,Changchun,130012,China)
出处
《西安邮电大学学报》
2020年第6期77-81,共5页
Journal of Xi’an University of Posts and Telecommunications
基金
国家自然科学基金项目(51405387)
陕西省自然科学基金项目(2016JQ5051)
陕西省教育厅科学研究计划项目(12JK0791)。
关键词
惯性导航系统
有限元
固有频率
随机振动
inertial navigation systems
finite element
natural frequency
random vibration
