Research on Deformation of Shock Absorber of SINS Under Vibration and Impingement
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 the-oretical 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 ( general-ly 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.
shock absorberdeformationvibration and impingementSINS
万方数据
维普
