A Hazard Analysis-based Approach to Improve the Landing Safety of a BWB Remotely Piloted Vehicle  

作　　者：LU Yi ZHANG Shuguang LI Xueqing 

机构地区：[1]Airworthiness Technologies Research Center, Beihang University, Beijing 100191, China

出　　处：《Chinese Journal of Aeronautics》2012年第6期846-853,共8页中国航空学报（英文版）

基　　金：National Natural Science Foundation of China (60832012);National High-tech Research and Development Program of China (2006AA11Z219);supported by Cheung Kong Scholars Innovation Team of Aero-Engine Complex System Safety of Ministry of Education of the People’s Republic of China (IRT 0905);Beijing Key Laboratory on Safety of Integrated Aircraft and Propulsion Systems

摘　　要：The BUAA-BWB remotely piloted vehicle （RPV） designed by our research team encountered an unexpected landing safety problem in flight tests. It has obviously affected further research project for blended-wing-body （BWB） aircraft configuration characteristics. Searching for a safety improvement is an urgent requirement in the development work of the RPV. In view of the vehicle characteristics, a new systemic method called system-theoretic process analysis （STPA） has been tentatively applied to the hazardous factor analysis of the RPV flight test. An uncontrolled system behavior ＂path sagging phenomenon＂ is identified by implementing a three degrees of freedom simulation based on wind tunnel test data and establishing landing safety system dynamics archetype. To obtain higher safety design effectiveness and considering safety design precedence, a longitudinal ＂belly-flap＂ control surface is innovatively introduced and designed to eliminate hazards in landing. Finally, flight tests show that the unsafe factor has been correctly identified and the landing safety has been efficiently improved.The BUAA-BWB remotely piloted vehicle （RPV） designed by our research team encountered an unexpected landing safety problem in flight tests. It has obviously affected further research project for blended-wing-body （BWB） aircraft configuration characteristics. Searching for a safety improvement is an urgent requirement in the development work of the RPV. In view of the vehicle characteristics, a new systemic method called system-theoretic process analysis （STPA） has been tentatively applied to the hazardous factor analysis of the RPV flight test. An uncontrolled system behavior ＂path sagging phenomenon＂ is identified by implementing a three degrees of freedom simulation based on wind tunnel test data and establishing landing safety system dynamics archetype. To obtain higher safety design effectiveness and considering safety design precedence, a longitudinal ＂belly-flap＂ control surface is innovatively introduced and designed to eliminate hazards in landing. Finally, flight tests show that the unsafe factor has been correctly identified and the landing safety has been efficiently improved.

关 键 词：BWB RPV landing safety STPA system dynamics safety design precedence sagging phenomenon belly-flap 

分 类 号：V226[航空宇航科学与技术—飞行器设计] TS958.28[轻工技术与工程]