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基于软件无线电的飞行CNS信号模拟可靠性研究

Research on Simulation Reliability of Flight CNS Signal Based on Software Radio
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摘要 本为了加强飞行航空器的安全性、提高飞行信号模拟的可靠性,提出基于软件无线电的飞行CNS信号模拟可靠性研究方法。以安全间隔和碰撞风险作为CNS信号模拟可靠性研究的基础,构建基于PCI总线的软件无线电平台,使CNS信号完成自适应调配。针对飞行下的高动态环境,利用振荡器频率误差对信号的影响,构建CNS高动态信号模型,使用接收信号幅值进行信噪比调配,保证在飞行时以最短时间对信号进行有效捕捉及追踪。同时解调接收方本地载波,补偿相应的频率误差,转换低频率载波信号,提高信号抗干扰能力。并将两架飞机的水平间隙作为碰撞条件,通过CNS信号参数估算出飞行的定位偏差,以此获得碰撞风险,判断出信号模拟的可靠性。仿真实验证明,所提方法可以大幅提升飞行的稳定性,降低事故发生概率,具备较强的实用价值。 In order to enhance the safety of aircraft and improve the reliability of flight signal simulation,a research method of reliability of flight CNS signal simulation based on software radio is proposed.Based on the research of safety interval and collision risk,a software radio platform based on PCI bus is built to realize the adaptive deployment of CNS signals.In view of the high dynamic environment in flight,the influence of oscillator frequency error on the signal is used to build the CNS high dynamic signal model,and the received signal amplitude is used to adjust the signal-tonoise ratio to ensure that the signal can be effectively captured and tracked in the shortest time in flight.At the same time,demodulate the receiver’s local carrier,compensate the corresponding frequency error,convert the low frequency carrier signal,and improve the anti-interference ability of the signal.Taking the horizontal clearance of the two aircraft as the collision condition,the positioning deviation of the flight is estimated by the CNS signal parameters,so as to obtain the collision risk and judge the reliability of the signal simulation.The simulation results show that the proposed method can greatly improve the flight stability and reduce the probability of accidents,and has strong practical value.
作者 曾涛 张磊磊 ZENG Tao;ZHANG Lei-lei(Avic xi'an aircraft branch office,Xi'an 710000)
出处 《环境技术》 2020年第2期65-70,共6页 Environmental Technology
关键词 软件无线电 PCI总线 CNS信号模拟 信号调制 software radio PCI bus CNS signal simulation signal modulation
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