船台测量场中多级转站的不确定度

Uncertainty of Multistage Station-transfer in Slipway Measurement Field

对在船台测量场内利用全站仪进行多级转站测量时误差的传递过程进行研究,分析误差的来源及其累积方法,建立转站过程中误差传递的数学模型,并据此推导出多级转站测量的系统误差传递公式及其不确定度估计公式。采用蒙特卡洛方法开展考虑全站仪测量误差的多级转站过程仿真试验,并将仿真结果与计算结果相对比。结果表明,提出的误差估计方法能较好地反映多级转站时误差的传递过程和不确定度的分布规律。

The transport of error by using total station to measuring with multistage station-transfer in slipway measurement is discussed.By analyzing the source of error and the accumulation method,the mathematical model which is describing the transport of error in station-transfer is established.According to the model,the mathematical expression of the system error and the uncertainty in multistage station-transfer measurement are derived.The Monte-Carlo method is performed to carry out the simulation test of multistage station-transfer process considering the measuring error of total station.The simulation result is compared with the calculation result.The results show that the presented estimation method can reflect well the transport of error and the distribution of uncertainty in multistage station-transfer.