将改善后的公理化设计方法与基于模型的系统设计结合,提出了一种面向复杂工程系统的基于模型的公理化设计方法(Axiomatic model based systems design,A-MBSD)。用例、活动和交互等系统行为作为连接系统功能和结构的桥梁被引入公理化设...将改善后的公理化设计方法与基于模型的系统设计结合,提出了一种面向复杂工程系统的基于模型的公理化设计方法(Axiomatic model based systems design,A-MBSD)。用例、活动和交互等系统行为作为连接系统功能和结构的桥梁被引入公理化设计中,形成新的行为域,从而整个设计过程能够被需求-功能-行为-结构之间的映射有效地表示。在A-MBSD中,一方面设计师可以利用设计域之间的'Z'字形映射描述系统设计从抽象到具体的演变;另一方面,设计师可以通过独立公理判断系统设计的耦合性,在设计早期发现设计参数之间的冲突。为了保证系统建模的统一性,使用Sys ML的扩展机制stereotypes将公理设计的核心概念定制到一般的系统设计过程中,形成A-MBSD建模profile。通过一个森林火灾卫星监控系统的设计证明了行为域的引入提高了设计矩阵的可靠性、基于模型的技术保证系统模型的统一性,并使设计师理解功能耦合的原因。展开更多
As a complex engineering problem,the satellite module layout design (SMLD) is difficult to resolve by using conventional computation-based approaches. The challenges stem from three aspects:computational complexity,en...As a complex engineering problem,the satellite module layout design (SMLD) is difficult to resolve by using conventional computation-based approaches. The challenges stem from three aspects:computational complexity,engineering complexity,and engineering practicability. Engineers often finish successful satellite designs by way of their plenty of experience and wisdom,lessons learnt from the past practices,as well as the assistance of the advanced computational techniques. Enlightened by the ripe patterns,th...展开更多
This paper presents an integrated approach to multidisciplinary collaborative simulation for complex engineering systems. The formulized paradigm of multidisciplinary collaborative simulation for com- plex engineering...This paper presents an integrated approach to multidisciplinary collaborative simulation for complex engineering systems. The formulized paradigm of multidisciplinary collaborative simulation for com- plex engineering systems is principally analyzed. An IEEE HLA and web services based framework is proposed to provide a heterogeneous, distributed and collaborative running environment where multidisciplinary modeling, running management and post-processing of collaborative simulation are undertaken. The mechanism of multidisciplinary collaborative modeling, disciplinary model transformation, and time-synchronized simulation advancement are studied in detail. A prototype with the functions of multidisciplinary modeling, running management and post-processing for collaborative simulations is developed, and a typical complex engineering system is chosen as a case study to demonstrate the effectiveness of this new approach towards collaborative simulation.展开更多
This paper presents a rapid and simple risk calculation method for large and complex engineering systems, the simulated maximum entropy method （SMEM）, which is based on integration of the advantages of the Monte Car...This paper presents a rapid and simple risk calculation method for large and complex engineering systems, the simulated maximum entropy method （SMEM）, which is based on integration of the advantages of the Monte Carlo and maximum entropy methods, thus avoiding the shortcoming of the slow convergence rate of the Monte Carlo method in risk calculation. Application of SMEM in the calculation of reservoir flood discharge risk shows that this method can make full use of the known information under the same conditions and obtain the corresponding probability distribution and the risk value. It not only greatly improves the speed, compared with the Monte Carlo method, but also provides a new approach for the risk calculation in large and complex engineering systems.展开更多
文摘将改善后的公理化设计方法与基于模型的系统设计结合,提出了一种面向复杂工程系统的基于模型的公理化设计方法(Axiomatic model based systems design,A-MBSD)。用例、活动和交互等系统行为作为连接系统功能和结构的桥梁被引入公理化设计中,形成新的行为域,从而整个设计过程能够被需求-功能-行为-结构之间的映射有效地表示。在A-MBSD中,一方面设计师可以利用设计域之间的'Z'字形映射描述系统设计从抽象到具体的演变;另一方面,设计师可以通过独立公理判断系统设计的耦合性,在设计早期发现设计参数之间的冲突。为了保证系统建模的统一性,使用Sys ML的扩展机制stereotypes将公理设计的核心概念定制到一般的系统设计过程中,形成A-MBSD建模profile。通过一个森林火灾卫星监控系统的设计证明了行为域的引入提高了设计矩阵的可靠性、基于模型的技术保证系统模型的统一性,并使设计师理解功能耦合的原因。
基金National Natural Science Foundation of China (50575031, 50275019)National High-tech Research and Development Program (2006AA04Z109)
文摘As a complex engineering problem,the satellite module layout design (SMLD) is difficult to resolve by using conventional computation-based approaches. The challenges stem from three aspects:computational complexity,engineering complexity,and engineering practicability. Engineers often finish successful satellite designs by way of their plenty of experience and wisdom,lessons learnt from the past practices,as well as the assistance of the advanced computational techniques. Enlightened by the ripe patterns,th...
基金Supported by the National Natural Science Foundation of China (Grant No. 60674079)the Key Laboratory of Beijing Simulation Center(Grant No. B0420060524)
文摘This paper presents an integrated approach to multidisciplinary collaborative simulation for complex engineering systems. The formulized paradigm of multidisciplinary collaborative simulation for com- plex engineering systems is principally analyzed. An IEEE HLA and web services based framework is proposed to provide a heterogeneous, distributed and collaborative running environment where multidisciplinary modeling, running management and post-processing of collaborative simulation are undertaken. The mechanism of multidisciplinary collaborative modeling, disciplinary model transformation, and time-synchronized simulation advancement are studied in detail. A prototype with the functions of multidisciplinary modeling, running management and post-processing for collaborative simulations is developed, and a typical complex engineering system is chosen as a case study to demonstrate the effectiveness of this new approach towards collaborative simulation.
基金supported by the National Water Pollution Control and Management Technology Major Projects(Grant No. 2009ZX07423-001)the National Natural Science Foundation of China (Grants No.51179069and 40971300)the Fundamental Research Funds for the Central Universities (Grants No.10QX43,09MG16,and 10QG23)
文摘This paper presents a rapid and simple risk calculation method for large and complex engineering systems, the simulated maximum entropy method （SMEM）, which is based on integration of the advantages of the Monte Carlo and maximum entropy methods, thus avoiding the shortcoming of the slow convergence rate of the Monte Carlo method in risk calculation. Application of SMEM in the calculation of reservoir flood discharge risk shows that this method can make full use of the known information under the same conditions and obtain the corresponding probability distribution and the risk value. It not only greatly improves the speed, compared with the Monte Carlo method, but also provides a new approach for the risk calculation in large and complex engineering systems.
