绝对重力仪落体加速分离段运动特性分析OA

For the laser interferometric absolute gravity instrument,analyze the motion characteristics of the cart and the falling object accelerated separation stage,use the laser vibrometer to get the vertical motion parameters of the cart,determine the time point of separation of the trailer and the falling object,project the vertical motion model after the separation of the falling object,and at the same time,use the laser interferometer to measure the actual motion curve of the falling object to validate it.The experiment shows that the separation time between the FG5-X type absolute gravity meter carriage and the falling object is 9.77±0.02 ms.The falling object displacement curve measured by laser interferometer is validated against the falling object motion model,and the results show that the difference between the measured falling object displacement and the falling object motion model displacement is small,the difference is distributed between±2×10-6 mm,and the standard deviation of the residual of the difference is 5.57×10-7 mm,which is in good consistency.