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

作者：Kang Zhi-Wei; Xu Xing-Man; Liu Jin; Li Na

来源：Journal of Astronautics, 2017, 38(9): 964-970.

DOI：10.3873/j.issn.1000-1328.2017.09.009

• Differential velocity
• Doppler velocity measurements
• Fault-detection mechanisms
• Integrated navigation
• Measurement model
• Navigation and positioning
• Spectral distortions
• Spectrum distortion

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.

• 出版日期2017
• 单位武汉科技大学