An exploratory study on the design schemes underlying two architectural precedents is presented and discussed. The study compares the formalistic compositions of two prominent precedents on multiple levels. These leve...An exploratory study on the design schemes underlying two architectural precedents is presented and discussed. The study compares the formalistic compositions of two prominent precedents on multiple levels. These levels include the morphological, semantic, and pragmatic layers. The morphological aspects of these layers are emphasized. The study aims to identify the commonalities and differences between two cases of classical sacred architecture in terms of their morphometric and morphosyntactic structures. These cases are represented by Palladio＇s II Redentore Church and Sinan＇s Suleymaniye Mosque designs. The scope of the analysis focuses on the syntax and mathematics of the floor plans, and the facade and section of each case are referenced occasionally. Within this scope, the proportional system that regulates the compositions and eidonomy of the precedents are scrutinized. Findings resulting from the comparative analysis are reported and then discussed. The study shows that the two ostensibly different precedents share obscurely many commonalities, which are greater than what their initial appearances suggest.展开更多
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
文摘An exploratory study on the design schemes underlying two architectural precedents is presented and discussed. The study compares the formalistic compositions of two prominent precedents on multiple levels. These levels include the morphological, semantic, and pragmatic layers. The morphological aspects of these layers are emphasized. The study aims to identify the commonalities and differences between two cases of classical sacred architecture in terms of their morphometric and morphosyntactic structures. These cases are represented by Palladio＇s II Redentore Church and Sinan＇s Suleymaniye Mosque designs. The scope of the analysis focuses on the syntax and mathematics of the floor plans, and the facade and section of each case are referenced occasionally. Within this scope, the proportional system that regulates the compositions and eidonomy of the precedents are scrutinized. Findings resulting from the comparative analysis are reported and then discussed. The study shows that the two ostensibly different precedents share obscurely many commonalities, which are greater than what their initial appearances suggest.
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.
