机抖激光陀螺的实时数据检测及压缩处理

Real-Time Error Detection and Data Compression on Mechanically Dithered Ring Laser Gyro

首先推导了一种对捷联惯导系统中机械抖动激光陀螺的原始高速采样数据进行预测的方法,然后讨论了根据此方法对激光陀螺的原始采样数据进行检测处理的过程。在实现对抖动幅度和抖动之间的干扰进行监控的同时,实时判断原始采样数据中的异常值,并用接近真实的值去替代异常值,提高了捷联系统的可靠性和容错能力。最后,详细介绍了利用此数据预测方法和Golomb编码对惯性器件的采样数据进行无损压缩与处理的步骤。此数据检测和压缩方法已经在实际捷联惯导系统中得到了验证,实现了对机科激光陀螺原始采样数据的监控和传输保存,在增强了系统可靠性的同时方便了试验数据的分析和处理。

Abstract： A method is presented for forecasting high speed sampling data of dithered ring laser gyro in strapdown inertial navigation system. The method can monitor the dither amplitude and the intervene between dithering, substitute wrong data with more reasonable data on high speed sampling without introducing any delay in time. The reliability and the error tolerance of strapdown systems can be enhanced. Finally, the Golomb encoding for data compressing of raw output from the inertial measurement unit is put forward. This method of data detection and compression has been used to detect, transmit and save raw data of laser gyros in a strap- down inertial navigation system. It improves the convenience on the data analysis and process- ing while increasing the system reliability. Key words： mechanically dithered ring laser gyro~ strap checking ; data compression; Golomb encodi down inertial navigation system~ data ng