雷达测姿系统实际上是一种惯性导航系统, 长时间未标定会发生加速度计零位变化, 直接影响水平测量精度。针对此问题, 该文分析了系统误差机理及可观测性, 根据实际雷达天线的运动范围, 提出了一种免拆卸加速度计零位基准误差补偿方案。此方案的标定方法简便, 能够有效地识别并估计三轴加速度计的零位误差, 补偿后的动态水平基准精度由2′提升至0.5′, 适合在不方便拆卸的雷达车等大型设备上使用。

The radar attitude determination system is actually an inertial navigation system. If it is not calibrated for a long time, the zero position of the accelerometer will change, which will directly affect the accuracy of horizontal measurement. In order to solve this problem, this paper analyzes the system error mechanism and observability. According to the actual radar antenna motion range, a zero reference error compensation scheme of accelerometer without disassembly is proposed. The calibration method is simple and can effectively identify and estimate the zero error of three-axis accelerometer, and the dynamic horizontal reference accuracy after compensation is improved from 2′ to 0.5′, which is especially suitable for large equipment such as radar trucks that are inconvenient to disassemble.