The Simulation Study For GBAS Ground Station And Fault Signal Characteristics Analysis

GBAS is a new precision approach and landing system in which GPS is the primary means of navigation. Compared to the traditional instrument landing system, both from the technical performance and economic terms, GBAS there is a huge advantage. Aircraft precision approach and landing process, needs to meet the requirements of ICAO navigation performance requirements, including the accuracy, integrity, availability and continuity, and integrity is the performance indicator that is the most difficult to meet. The study of ground-based augmentation system(GBAS) is to be focused on, after a study to analyze the GPS positioning theory and differential correction algorithm, in-depth understanding of the working principle and GBAS ground station integrity monitoring algorithms and logic, does simulation experiments for the integrity of GBAS ground station, GBAS ground station integrity monitoring system can detect system failure. The failure characteristics are also to be analyzed. GBAS ground station may have these failures, establishes GBAS system signal model that can generate three cases GBAS signal(normal, limited and failure),and does simulation experiments for the signal model showing GBAS ground station failures can be modeled as a ramp model and step signal, signal is used to the simulation study of airborne airworthiness assessment, and to provide data to support the GBAS airborne airworthiness assessment, laid the theoretical foundation for future research in related fields, can effectively save the airport operating costs, improve operational efficiency, greatly improve the modernization level of the domestic civil aviation airport equipment.