Real-time measurement of dynamic pointing error of attitude stabilization platform based on photogrammetry

As a device for keeping the platform pointing in a specific direction, dynamic pointing error is a key index of a stabilized attitude platform. In this paper, a six-degree-offreedom platform is used to simulate changes in angle of the stabilized platform in working conditions so that the real-time pointing error in the platform during the motion can be calculated by analyzing the images captured by high-speed cameras installed on its worktable. The results reveal a strong link between the pointing error in the platform and the angle at which the platform strays off the original position almost irrelevant to the offset angle speed and acceleration. In addition, larger offset angle comes with greater pointing error. When the offset angle is 7.93
^°
, the maximum value of the pointing error is 1.09
^°
, which is slightly greater than its design index of 1°. This promotes the development and optimization of the attitude stabilization platform.