论惯导平台中的振动诱导漂移

On Vibration-Induced Drift Rate of Inertial Platform

研究了惯导平台中的振动诱导漂移．结果表明：振动诱导漂移由常值分量和航向效应分量组成。它们的大小与陀螺转子的径向静不平衡量和轴向振动强度成正比，且与平台的结构参数、两陀螺在台体上的位置配置、两陀螺自转及轴向振动的相位移有密切关系．如不采取有效措施，将严重影响惯导系统的性能。

One of the many problems that require deeper study in present day aerospace industry in China is heading drift of inertial platform. The author applies Kayton's theory[2] to study heading drift rate, but it is believed that structural and motion parameters taken are more realistic than those of Kayton and thus the author gets results of possible use in engineering.Kayton discovered that vibration is the cause of heading drift and some other drifts. The coordinate axes used in his theoretical analysis arc fixed on the platform body. The structural and motion parameters he used arc in terms of such fixed axes and thus deviate from actual working conditions of inertial platform. The author expresses structural and motion parameters in terms of gimbal axes and thus eqs.(29￣32) for computing vibration-induced drift rate, including heading drift rate, is derived. Finally the author deems that effective measures, in which the findings of this paper can very likely play a part, should be taken to ensure position precision of inertial navigation through reduction of vibration-induced drift rate.