所属单位：民航学院
发表刊物：JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS
关键字：full authority digital engine control (FADEC) system Markov model (MM) accuracy analysis loss of thrust control (LOTC)
摘要：Time-limited dispatching (TLD) analysis of the full authority digital engine control (FADEC) systems is an important part of the aircraft system safety analysis and a necessary task for the certification of commercial aircraft and aeroengines. In the time limited dispatch guidance document ARP5107B, a single-fault Markov model (MM) approach is proposed for TLD analysis. However, ARP5107B also requires that the loss of thrust control (LOTC) rate error calculated by applying the single-fault MM must be less than 5% when performing airworthiness certification. Firstly, the sources of accuracy errors in three kinds of MM are analyzed and specified through a case study of the general FADEC system, and secondly a two-fault MM considering maintenance policy is established through analyzing and calculating the expected repair time when two related faults happen. Finally, a specific FADEC system is given to study on the influence factors of accuracy error in the single-fault MM, and the results show that the accuracy error of the single-fault MM decreases with the increase of short or long prescribed dispatch time, and the range values of short time (ST) and long time (LT) are determined to satisfy the requirement of accuracy error within 5%.
ISSN号：1004-4132
是否译文：否
发表时间：2019-10-01
合写作者：Hu Wei,周储伟,Cai Kunye
通讯作者：蔡景
发表时间：2019-10-01