VOR信号量值溯源技术研究

Research on the Traceability Technology of VOR Signal

基于相位发生器和调频调幅设备建立了甚高频全向信标(VOR)标准信号发生装置,将VOR相位量值溯源至国家相位基准,解决了传统基于直接数字信号合成方法难以实现量值溯源的问题。对VOR标准信号发生装置的不确定度进行了评定,VOR相位扩展不确定度小于±0. 020°(k=2),VOR调幅深度不确定度为±0. 2%(k=2)。基于该标准信号发生装置可以对商用VOR信号发生和解调设备提供校准。

Based on a phase generator and frequency modulation( FM)/amplitude modulation( AM) instruments,a standard very high frequency omnidirectional range( VOR) signal generator is established to realize the traceability of VOR phase quantity to the national phase standard,which cannot be achieved using traditional method of direct digital synthesizing. According to the uncertainty analysis,the extended uncertainty of VOR phase is less than ± 0. 020°( k = 2),while that of VOR modulation depth is ± 0. 2%( k = 2). This standard VOR signal generator can be used to calibrate commercial avionic instruments for VOR signal generation and demodulation.