基于ARM技术的捷联惯导系统信号降噪分析与设计

Analysis and design of signal noise elimination for strapdown inertial navigation system based on ARM technology

利用ARM技术,设计了捷联惯导系统。为了提高惯导系统的稳定性,需要对陀螺信号的零位进行校正以及对漂移进行抑制。首先对加速度传感器、磁场传感器、陀螺输出的信号进行采样与滤波,尤其在对陀螺信号的处理过程中,需要设计一个高性能、低运算量的低通数字滤波器,并合理设计信号调理电路,以提高敏感器件的工作效率和有效抑制器件所引起的零位漂移。实验结果表明,零位漂移≤0.1(°)/s/h,其他的多项技术指标也达到了应用的标准。

The strapdown inertial navigation system（SINS）was designed by using ARM technology. To improve the stability of inertial navigation system,the zero position of the gyroscope signal is needed to correct,and the drift is restrained. Signals output from acceleration sensor,magnetic sensor and gyroscope should be sampled and filtered. A low-pass digital filter with high performance and low operation should be designed for processing the gyroscope signal,and the signal conditioning circuit is designed reasonably to improve operation efficiency of the sensitive components and restrain zero drift caused by the components effectively. The experimental results show that the zero drift≤0.1（°）/s/h,and other technical indexes can achieve application standard.