Combining Flight-deck Interval Management with Continuous Descent Approaches in high density traffic and realistic wind conditions

摘要

This paper discusses a new implementation of an Airborne Spacing concept, which goal it is to achieve an assigned spacing with a lead aircraft at the runway threshold. The implementation uses the Trajectory Predictor of the Flight Management System to improve the Time-T0-G0 (TTG) prediction. This TTG is broadcast over ADS-B, making other types of broadcast reports like the Route ID and Final Approach Speed, superfluous. This paper furthermore implements a novel wind estimation filter, which uses available broadcast information to improve TTG prediction accuracy and therefore spacing performance. Fast Time simulations were performed with randomized disturbances to assess robustness in a variety of circumstances. The results show that broadcasting TTG has similar performance as the original implementation and is highly robust to variations in broadcast rate. The wind estimation filter increases available control-space for spacing purposes as compared with using outdated wind information from e.g., charts.