作　　者： (任娟）; (章博）;

机构地区： 北京航空航天大学仪器科学与光电工程学院

出　　处： 《导航与控制》 2015年第5期105-110,58,共7页

摘　　要： 针对采用空间五点减振的捷联惯组系统,介绍了其总体设计方案,对减振系统的固有频率进行了理论推导和模态仿真,对不同减振布局下捷联惯组的冲击响应进行了分析。结果表明:对于空间五点减振的捷联惯组,其线振动固有频率不随减振器的位置而改变,而角振动固有频率随减振器跨度的增大而增大;单独改变第5点减振器的位置对调整系统角振动固有频率的作用有限,但可有效影响系统的偏心量,进而显著改变IMU在冲击下的角振动响应幅值,较小的偏心量可以降低系统在冲击作用下的角振动幅值;在系统偏心量不变的情况下,同步增加除第5点外的其余4个减振器的跨度,有利于减少系统的角振动响应幅值。 The integrated design of strapdown inertial navigation system(SINS) with spatial-five-vertices arrangment of isolators was introduced and the effect of five isolators’ arrangement and span on natural frequency and shock reaponse behaviour of SINS was studied.By using the finite element method(FEM),the model analysis results demonstrate that torsional vibration frequency increased with the span of isolators while linear vibration frequency doesn’t change.Though the adjustment of the fifth isolator position could not change torsional vibration frequency of system obviously,it modified eccentricity of IMU efficiently thus changed torsional vibration amplitude of IMU under shock condition.On condition that eccentricity of IMU keeping constant,increasing the span of isolators except the fifth simultaneously would decrease the amplitude of torsional vibration response.

关 键 词： 捷联惯组 减振器 固有频率 冲击响应