Abstract
The navigation and velocity measurement methods using GPS (global positioning system) signals based on a side-mounted single patch antenna are key technologies of the trajectory correction projectile. However, when the single patch antenna on the projectile receives the GPS signals at a high spin rate, there are effects such as the periodic Doppler shift induced by the rotation and crystal oscillator frequency offset, and periodic blockage that interferes with the measurement of the projectile’s velocity. By analyzing the characteristics of the Doppler frequency of carrier and pseudorange rate, we propose a velocity measurement method using pseudorange rate to separate crystal oscillator frequency offset-induced Doppler shift and estimate the velocity for high-spinning projectiles by optimization. This method eliminates hazardous frequency induced by rotation and facilitates precise velocity measurement. The method has been verified through testbed experiments. The experimental results show that after eliminating hazardous Doppler frequency under high spin rate conditions, the root mean square error (RMSE) of velocity measurement was 0.42 m/s, which meets the requirements for velocity measurement in trajectory correction projectiles.
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The data that support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
We would like to thank the Science and Technology on Electromechanical Dynamic Control Laboratory at the Beijing Institute of Technology, and the Chongqing Innovation Center of Beijing Institute of Technology for their support. This research was founded by the National Natural Science Foundation of China, Grant Number 61973033.
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WP performed the research and wrote the manuscript. QS supervised this project and gave helpful suggestions on analysis and investigation. ZD performed the research and provided guidance. HW contributed to the data analysis. HL and ZL contributed to coding and validation of the method.
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Pu, W., Shen, Q., Deng, Z. et al. Velocity estimation method for high-spinning vehicle based on a side-mounted single patch antenna. GPS Solut 28, 59 (2024). https://doi.org/10.1007/s10291-023-01601-7
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DOI: https://doi.org/10.1007/s10291-023-01601-7