一种改进的GBAS地面站MRCC故障监测算法

地基增强系统(Ground Based Augmentation System,GBAS)是支持飞行器精密进近着陆的有效手段,完好性监测算法的设计是保障飞行安全的关键点与系统设计的难点,多参考接收机一致性监测(MRCC)通过B值计算与故障监测流程可排除校正中产生很大误差的接收机信道,保证GBAS地面站发送差分修正量的可靠性.分析了MRCC算法的原理与方法,发现MRCC故障监测流程无法有效处理伪距与载波相位B值均超过阈值,且最大值不为同一通道的问题,针对该问题提出了一种MRCC故障监测流程改进算法,并且对已有和改进的MRCC故障监测流程算法进行了实验对比.结果表明,改进算法故障监测流程针对伪距和载波相位引起的不一致性分层处理,可有效解决当前存在问题.

Improved MRCC fault monitoring algorithm for GBAS ground station

Ground based augmentation system (GBAS) can strongly support aircraft's precise approach landing,and integrity monitoring is not only the difficulty of the system realization but also the key point to safeguard the flight.In order to ensure the reliability of the differential correction from the GBAS ground station,the B value calculation and fault monitoring process in the multiple reference consistency check (MRCC) are used to eliminate the receiver channel which generates a lot of error in the correction.The principle and method of MRCC algorithm are analyzed in this paper,the problem of pseudo range and carrier phase Bv alues are both more than threshold and the maximum value is not in the same channel are founded in the MRCC fault monitoring process.An improved algorithm of MRCC faultmonitoring process is proposed for this problem,then the existing and improved MRCC fault detection algorithms are compared in the experiment.The results indicate that the improved algorithm can effectively solve the current problems in the hierarchical process of the inconsistency caused by the pseudo range and carrier phase.