基于重力矢量测量的惯性平台摇摆动态精度测试方法研究

为了准确高效地评估高精度惯性平台的摇摆动态精度,提出了一种基于重力矢量测量的惯性平台摇摆动态精度测试方法。惯性平台台体在摇摆过程中稳定在惯性空间,通过安装在平台台体上的3个正交方向的石英加速度计测量重力矢量,重力矢量在台体上的投影角直接反映平台台体的姿态变化,根据测量方法误差及石英加速度计输出特性进行姿态解算,并通过计算惯性平台动静漂移率之差得到惯性平台的摇摆动态精度。惯性平台的摇摆试验结果表明,基于重力矢量测量的惯性平台摇摆动态精度测试方法稳定性好、可信度高,并在误差控制方面明显优于传统的摇摆测试方法。

The Research about Test Method Based on Measuring Gravity Vector for Rocking Dynamic Accuracy of Inertial Platform

A method based on measuring gravity vector for rocking dynamic accuracy of inertial platform is proposed,in order to accurately and efficiently assess rocking dynamic accuracy of high-precision inertial platform.The inertial platform can maintain stability in the inertial space during the process of rocking,and gravity vector can be measured via three orthogonal quartz accelerometers in the inertial platform.The posture change of inertial platform is directly reflected by the projected angle of gravity vector on inertial platform,and attitude algorithm can be done on the basis of measurement errors and output characteristics of quartz accelerometers,and the rocking dynamic accuracy of inertial platform is got by calculating the difference of dynamic and static drift rate.Based on the rocking test of inertial platform,the method based on measuring gravity vector for rocking dynamic accuracy of inertial platform is more stabilized and high in reliability,and this method is superior to the traditional rocking test method in the aspect of error control.