针对减振器传统研究的关注点主要在减振效果、材料寿命等方面,对其形变量及形变带来的导航误差关注较少,偏重理论研究而无试验数据支撑,缺乏说服性的问题,文中在捷联惯导减振器设计基础上,制定了静态和动态试验方案。在振动工装上固定一对相互垂直的平面镜,通过减振器将惯导安装到振动工装上,振动工装以刚性连接方式固定在振动台面上,借助架设的光学投影设备和显像设备,分别振动冲击前后惯导棱镜和振动工装上平面镜的反射光斑,通过对二者位移变化的计算,判定减振器的空间形变量。试验结果表明,振动冲击前后及过程中,减振器形变引起的惯导最大形变角为6.26″,比惯导在运载体上的安装误差稳定性(一般为1.0')低一个数量级,减振器的空间形变量对捷联惯导的导航误差影响较小,文中的试验方法和实测数据可为惯导减振器的设计和应用提供借鉴。

For the shock absorber, the traditional research focuses mainly on the vibration damping effect, material life, etc., but pays less attention to the navigation error brought by its strain and deformation, and too much emphasis is placed on the theoretical research without the support of experimental data, which is lack of persuasiveness,in this paper,static and dynamic measurement schemes are developed based on the design of shock absorber of strap-down inertial navigation system(SINS). Firstly, a pair of plane mirrors which is perpendicular to each other is fixed on the vibration fixture. And then SINS is installed on the vibration fixture through shock absorbers. Finally, four devices of optical projection and imaging are set up to record the reflected light spots of SINS and plane mirrors before and after the vibration and impingement. Through the calculation of the displacement change of light spots, deformation of shock absorber is determined. The results show that the maximum angle of deformation of SINS caused by shock absorber deformation is 6.26″,which is far lower than installation error stability (generally less than 1.0') between SINS and carrier. The spatial deformation of the shock absorber has a small effect on the navigation error of SINS. The test scheme and measured dates in this paper can be as reference for design and application of SINS shock absorber.