A Hazard Analysis Based Approach to Improve the Landing Safety of a Blended-wing-body Remotely Piloted Vehicle
The BUAA-BWB remotely piloted vehicle (RPV) designed by our research team encountered an unexpected landing safety problem in flight experiments.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.Combining with vehicle characteristics, a new systemic method called System-Theoretic Process Analysis (STPA) has been imported to apply on the RPV flight experiment hazard analysis.An uncontrolled system behavior “path sagging phenomenon is identified by implementing a 3 degree of freedom simulation based on wind tunnel experiment data and establishing landing safety system dynamics archetype, then a derived safety improvement requirement emerges.To obtain higher safety design effectiveness and considering safety design precedence, a new longitudinal control surface “belly-flap is used to eliminate hazards in landing.Finally, Flight experiments show that the hazardous factor has been correctly identified and the landing safety has been efficiently improved.
BWB RPV STPA sagging phenomenon system dynamics safety design precedence belly-flap
LU Yi ZHANG Shu-guang LI Xue-qing
School of Transportation Science and Engineering,Beihang University,Beijing,P.R. China
国际会议
北京
英文
178
2011-10-01（万方平台首次上网日期，不代表论文的发表时间）