动基座下自调平台对方位角测量的影响分析

自调平台通过光电传感器敏感基座二维姿态的变化,根据基座姿态角的变化量,通过执行器件对框架进行回调,使工作台面处于水平状态。自调平台能够为动基座下的测量仪器提供水平基准,为这类测量仪器在动基座环境下的正常使用提供了可能,例如经纬仪类仪器在船上的应用。通过对自调平台调平过程的分析发现,在调平过程中,基座上被测目标与调平工作面之间存在一定的方位偏转,该偏转直接影响到测量结果,属于测量误差。分析出影响方位偏转量的各个参数,并分别对各参数的影响程度进行了阐述。最后,根据分析结果给出使用自调平台的注意事项。

Effects of the Self-stabilization Platform on Azimuth Angle Measurement in Condition of Moving Base

The platform is remained horizontal by self-stabilization platform，which the angle variation on the base is sensed by optical electrical sensors. The horizontal benchmark is offered by self-stabilization platform for the measurement instrument. The instrument, which needs the horizontal benchmark, can be used in the moving base surroundings. For example，the theodolite can be used in a ship. But，in the moving base surroundings，using self stabilization platform as the horizontal benchmark，the theodolite is used to measuring azimuth angle. But, through the analysis of the self-stabilizaing processing, there is a turn angle in azimuth direction between the measuring aim and the stabilized platform. It influences the measuring precision of azimuth angle. Based on the theories of self stabilization platform，the calculation formula is derived.The main factors, which influence the azimuth angle, are analyzed.The influencing degree of the parameters are respectively expounded. Finally,based on these analysis results, the considerations of measuring the azimuth angle are performed,when self-stabilization platform is used. The methods of avoiding measuring error and the methods of error compensation are discussed.