系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (7): 1894-1903.doi: 10.12305/j.issn.1001-506X.2021.07.21

• 制导、导航与控制 • 上一篇    下一篇

基于BP-PID控制的载波频率准确度提高算法

苏瑜1,2,3, 荆文芳1,2,3,*, 卢晓春1,2,3, 张阳1,2,3   

  1. 1. 中国科学院国家授时中心, 陕西 西安 710600
    2. 中国科学院大学, 北京 101408
    3. 中国科学院精密导航定位与定时技术重点实验室, 陕西 西安 710600
  • 收稿日期:2020-08-12 出版日期:2021-06-30 发布日期:2021-07-08
  • 通讯作者: 荆文芳
  • 作者简介:苏瑜 (1989—), 女, 博士研究生, 主要研究方向为卫星导航信号分析, 转发式卫星导航系统新技术|荆文芳 (1976—), 女, 研究员, 硕士研究生导师, 博士, 主要研究方向为微波时间频率传递技术、导航与通信技术|卢晓春 (1970—), 女, 研究员, 博士研究生导师, 博士, 主要研究方向为卫星导航|张阳 (1992—), 博士研究生, 主要研究方向为时间频率传递、转发式卫星导航系统授时新技术
  • 基金资助:
    国家科学自然基金(E007ZK1701)

Carrier frequency accuracy improvement algorithm based on BP-PID control

Yu SU1,2,3, Wenfang JING1,2,3,*, Xiaochun LU1,2,3, Yang ZHANG1,2,3   

  1. 1. National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China
    2. University of Chinese Academy of Sciences, Beijing 101408, China
    3. Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Xi'an 710600, China
  • Received:2020-08-12 Online:2021-06-30 Published:2021-07-08
  • Contact: Wenfang JING

摘要:

转发式卫星导航系统是我国自主研发的一种新型卫星导航体制和系统, 但由于受到上行链路多普勒与卫星转发器的影响, 系统载波频率准确度量级为10-8, 达不到系统载波频率的使用精度。为解决此问题, 详细分析了恶化转发式卫星导航系统载波频率的影响因素, 通过测量分析得到上行载波频率的预偏量, 采用基于反向传播神经网络的比例积分微分控制方法, 对上行载波频率进行实时控制调整。对控制调整算法进行仿真验证, 响应时间为50 s, 控制残差的均方根误差为0.022 Hz。采用卫星实际观测数据, 结果表明系统载波频率准确度量级从10-8提升至10-14, 可满足于转发式卫星导航系统载波频率及载波相位的应用。

关键词: 转发式卫星导航系统, 频率调整, 反向传播神经网络, 比例积分微分控制

Abstract:

The forwarding satellite navigation system is a new type of satellite navigation structure and system independently researched and developed in China. However, due to the influence of uplink Doppler and satellite transponder, the carrier frequency accuracy order of the system is 10-8, which cannot reach the accuracy of the carrier frequency of the system. In order to solve this problem, the factors that aggravate the carrier frequency of the forwarding satellite navigation system are analyzed in detail, and the pre-offset of uplink carrier frequency is obtained by measurement and analysis. The uplink carrier frequency is controlled and adjusted in real time by proportion integration differentiation control method based on back propagation neural network. The control adjustment algorithm is simulated and verified, the response time is 50 s and the root mean square error of the control residual is 0.022 Hz. Using the actual satellite observation data, the results show that the carrier frequency accuracy order of the system is improved from 10-8 to 10-14, which is suitable for the application of the carrier frequency and carrier phase of the forwarding satellite navigation system.

Key words: forwarding satellite navigation system, frequency adjustment, back propagation neural network, proportion integration differentiation control

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