航天器總裝精度測量中一種不規(guī)則棱鏡矢量計算方法

A vector calculation method of irregular prism for spacecraft integration precision measurement

摘要: 航天器總裝精度測量一般是通過被測設(shè)備上安裝的立方鏡實現(xiàn)的。某型號上的一種設(shè)備受其在航天器上安裝位置的限制，使用經(jīng)緯儀和現(xiàn)有精度測量軟件無法直接測得立方鏡三個相互垂直平面法線在航天器坐標(biāo)系下的角度。文章提出使用切角為135°不規(guī)則棱鏡替代立方鏡，并詳細介紹了切角為135°不規(guī)則棱鏡三個相互垂直平面法線在航天器坐標(biāo)系下矢量的計算方法。該方法已經(jīng)過驗證和認可，并應(yīng)用到后續(xù)型號的精度測量工作中。

Abstract: The spacecraft integration precision measurement is based on a cubic prism fixed on the equipment. Because of the limitation of the assembly position on the spacecraft, the use of the electronic theodolite and the current precision measuring software can not fully cover the angles of the three normals of the mutually perpendicular planes of the cubic prism relative to the spacecraft coordinate system. This paper proposes a method of replacing a cubic prism with a 135° irregular prism and a vector calculation method for the irregular prism, to deal with the vectors of three normals of the three mutually perpendicular planes of the 135° irregular prism relative to the spacecraft coordinate system. This method was tested, verified and applied in the follow-upspacecraft precision measurement.