航空学报 > 2024, Vol. 45 Issue (3): 328692-328692   doi: 10.7527/S1000-6893.2023.28692

机械天线阵列系统的伺服优化及调制方式

郝振洋1, 秦岭1, 曹鑫1, 张绮瑶1, 周强2()   

  1. 1.南京航空航天大学 自动化学院,南京 210016
    2.国防科技大学 第六十三研究所,南京 210007
  • 收稿日期:2023-03-14 修回日期:2023-03-31 接受日期:2023-04-23 出版日期:2024-02-15 发布日期:2023-05-12
  • 通讯作者: 周强 E-mail:zhouqiang63@nudt.edu.cn
  • 基金资助:
    国家自然科学基金(52077100);航空科学基金(201958052001)

Optimal servo system and modulation method of mechanical antenna array

Zhenyang HAO1, Ling QIN1, Xin CAO1, Qiyao ZHANG1, Qiang ZHOU2()   

  1. 1.College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
    2.The Sixty?third Research Institute,National University of Defense Technology,Nanjing 210007,China
  • Received:2023-03-14 Revised:2023-03-31 Accepted:2023-04-23 Online:2024-02-15 Published:2023-05-12
  • Contact: Qiang ZHOU E-mail:zhouqiang63@nudt.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52077100);Aeronautical Science Foundation of China(201958052001)

摘要:

旋转永磁式机械天线(RMBMA)作为一种全新的超低频电磁通信模式,可以显著降发信机的尺寸和功耗,但其存在远距离辐射场强弱、通讯波特率和准确率低等问题,不利于实际应用。为此提出了基于永磁同步电机直驱式的旋转永磁式机械天线阵列系统,并针对机械天线信号调制的瞬态大电流和转速频繁切换的工况,提出了基于无差拍电流预测模型的机械天线位置差协调控制策略,提高了系统的伺服性能且满足应用需求。对所提位置差协调控制参数进行设计,理论验证系统的伺服性、稳定性及鲁棒性,实现机械天线调制信号的高传输速率与低误码率。最后,搭建了机械天线阵列系统的实验测试平台,并对其近区磁场场强分布和驱动系统的伺服性能进行了实验测试,系统的近区场强相比于单磁源实现了翻倍,有效解决了场强弱的问题。电机伺服系统转速无超调且调节时间≤0.25 s,达到了伺服控制指标。

关键词: 旋转永磁式机械天线(RMBMA), 机械天线阵列, 调制信号加载, 协调控制策略, 无差拍电流预测控制(DPCC)

Abstract:

As a new communication pattern, the Rotating Magnet-Based Mechanical Antenna (RMBMA) can significantly reduce both the size and the power consumption of the super-low frequency electromagnetic transmitter. However, it has the problems of weak radiated magnetic field intensity and low communication baud, limiting its practical applications. To solve these problems, this paper proposes a RMBMA array system based on the direct drive of permanent magnet synchronous motor. For the working conditions of high transient current and frequent speed switching of mechanical antenna signal modulation, a position difference coordinated-control strategy based on the deadbeat current prediction model is proposed, which improves the servo performance of the system and meets the application requirements. The proposed position difference coordinated-control parameters are designed, and the servo performance, stability and robustness of the system are theoretically verified. The high transmission rate and low bit error rate of the modulation signal of the mechanical antenna are realized. Finally, an experimental test platform for the mechanical antenna array system is built, and the distribution of the magnetic field strength in the near area and the servo performance of the drive system are tested experimentally. Compared with the single magnetic source, the magnetic field intensity in the near area of the system is doubled, showing that the problem of weak radiated magnetic field intensity can be effectively solved. The speed of the motor servo system has no overshoot and the adjustment time is ≤0.25 s, reaching the servo control index.

Key words: Rotating-Magnet Based Mechanical Antenna (RMBMA), mechanical antenna array, modulated signal loading, coordinated-control strategy, Deadbeat Predictive Current Control (DPCC)

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