航天测量船船体变形数据处理方法[中文稿]

为了克服船体变形对航天测量船船载设备外测数据的影响，须对船载设备外测数据进行船体变形修正，为此建立船体变形修正数学模型。从航天测量船船体变形测量系统的基本构成、测量原理和测量元素入手，建立变形测量坐标系，讨论变形测量角与欧拉角的关系，详细推导船体变形数据处理计算公式，给出变形数据处理数学模型。工程应用结果表明：船体变形对飞行器初轨半长轴a的影响是比较大的，对于近地近圆轨道，影响是几百米的量级，最大达到800～900m，而对于大椭圆轨道，影响则达到20多km，经船体变形修正后可以消除这项影响。建立的变形修正数学模型反映了船体变形的客观规律，能有效消除其对船载设备外测数据的影响，提高测量船外测数据处理的精度。

The Spacecraft TT&C Ship Hull Deformation Measurement Data Processing Methods

To reduce the influence of hull deformation to the data of TT&;C shipborne outer-trajectory measuring equipments, hull deformation correction mathematical model needs to be established. Firstly, in this paper, the basic structure, measurement principle and measurement elements of hull deformation measurement system are briefly introduced; Secondly, hull deformation measurement coordinate system is established; Thirdly, relationship between deformation measurement angles and Euler’s angles is discussed; Finally, hull deformation data processing calculation formula is deduced in detail and data processing mathematical model is presented. Engineering application result shows: the influence of hull deformation to spacecraft initial orbit semi-major axis “a” is comparatively greater, to near earth and near circular orbit, the influence is hundreds of meters magnitude, whose maximum value is 800-900m; as to big elliptical orbit, the influence reaches 20km or higher. However, the influence can be eliminated after hull deformation correction. The established mathematical model reflects the objective law of hull deformation, which can be used to effectively eliminate the influence of hull deformation to measurement data so as to improve data processing precision.