静电陀螺伺服测漂数据处理方法研究

Research on Data Processing Method of ESG Drift Getting by Servo Turntable Mode

静电陀螺仪通常用于空间稳定系统中,因此用伺服法进行漂移测试和建模具有现实意义。本文讨论了一种静电陀螺伺服测漂数据处理的方法,对三次伺服测漂试验数据进行了分析和处理。考虑到伺服测漂中失调角甚小,采用简化常值漂移模型,参数估计采用离散卡尔曼滤波以提高精度,并用时间序列分析法建立随机漂移模型。拟合结果表明,上述方法对建立和辨识高精度静电陀螺漂移模型具有较高精度。

Because electrostatic gyro is usually used in a space stabilized system,it is significant for using servo turntable mode to test the drift of electrostatic gyro and determine the drift model.In this paper,a kind of data processing method of electrostatic gyro drift which got by two-axis servo turntable test is discussed,and three data samples obtained from tests are analyzed and processed.Considered the extremely small misalignment angle in servo turntable mode,simplified constant drift model is used.In order to improve precision,discreted Kalman filter is used to identify the constant drift model coefficients,and time series analysis method is used to determine the random drift model.The computation results show that the data processing method described in this paper is effective to determine the drift model of high precision electrostatic gyro and identify the unknown coefficients of the model.