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 （...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.展开更多
The Blended-Wing-Body (BWB)configuration may become one of themainconfigurationsforthenext generation of wide-body civil aircraft.A research team led by Northwestern Polytechnical University has been devoted to the BW...The Blended-Wing-Body (BWB)configuration may become one of themainconfigurationsforthenext generation of wide-body civil aircraft.A research team led by Northwestern Polytechnical University has been devoted to the BWB configuration for more than ten years, and has achieved a series of key technology research results.展开更多
基金National Natural Science Foundation of China (60832012)National High-tech Research and Development Program of China (2006AA11Z219)+1 种基金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
文摘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.
文摘The Blended-Wing-Body (BWB)configuration may become one of themainconfigurationsforthenext generation of wide-body civil aircraft.A research team led by Northwestern Polytechnical University has been devoted to the BWB configuration for more than ten years, and has achieved a series of key technology research results.
