基于双测量模型的多普勒测速及其组合导航

Doppler Velocity Measurement Based on Double Measurement Model and Its Integrated Navigation

为降低光谱畸变对多普勒测速的影响,提高导航定位精度,提出了一种基于双测量模型的多普勒测速方法,即通过故障检测机制判断太阳光谱是否畸变,以分别采用多普勒差分测速或二维多普勒测速。此外,为减少多普勒测速导航存在的累积误差,将该方法与X射线脉冲星导航相结合进行组合导航。仿真结果验证了该方法的有效性,与其他X射线脉冲星/多普勒组合导航相比,该方法可抗光谱畸变影响,并可获得更高的位置和速度估计精度。

In order to reduce the influence of the spectral distortion on the Doppler velocity measurement and improve the navigation and positioning accuracy, we propose a Doppler velocity measurement method based on a double measurement model. With this method,whether the solar spectrum is distorted or not is judged by the fault detection mechanism so as to decide to adopt the Doppler differential velocity measurement or the two-dimensional Doppler velocity measurement. Furthermore, we combine it with the X-ray pulsar navigation method to lessen the problem of the accumulative state error. The simulation results verify the effectiveness of the method. Compared with other X-ray pulsar/Doppler integrated navigation methods,the proposed method can resist the influence of the spectrum distortion and obtain the high accuracy estimation of position and velocity as well.