航天器任务具有任务复杂、高风险、高成本、高可靠性、长周期等特点,为了适应未来更加复杂的航天器任务研制需要,在航天器设计与研制中引入了基于模型的系统工程(model-based system engineering,MBSE)方法。提出了基于模型的航天器研...航天器任务具有任务复杂、高风险、高成本、高可靠性、长周期等特点,为了适应未来更加复杂的航天器任务研制需要,在航天器设计与研制中引入了基于模型的系统工程(model-based system engineering,MBSE)方法。提出了基于模型的航天器研制流程和适应航天器研制过程需要的6类模型体系,分别为需求模型、功能模型、工艺模型、架构模型、产品模型以及验证模型。以月球水资源探测为假想任务背景,给出了MBSE建模过程及其模型,充分体现了MBSE方法在航天器设计及其集成仿真验证方面的优势。展开更多
In order to obtain optimized flight vehicle concepts which meet system of systems （SOS） operation requirements, designers have to pay high attention to the impact of SoS at conceptual design stage since operation en...In order to obtain optimized flight vehicle concepts which meet system of systems （SOS） operation requirements, designers have to pay high attention to the impact of SoS at conceptual design stage since operation environment goes increasingly complex. Based on this tendency, per- spectives and progre,;ses of SoS oriented flight vehicle conceptual design, which is abbreviate as SoSed design, are reviewed in this paper. Such basic concepts of SoS as definition, characteristics, differences between systems engineering and SoS engineering, as well as SoSed design process are introduced, then SoS engineering process model for research and development of flight vehicles and SoSed design wheel model for conceptual design are proposed. Related literature is classified and analyzed in accordance with four major elements including requirements, design concept, design analysis, and trade studies and optimization： typical SoS architectures, description and quan- tization of indexes are introduced; Application of inverse design in designing concept is analyzed; Modeling and simulation （M＆S）-based methods and their applications in SoSed effectiveness evaluation are highlighted; According to SoSed trade studies and optimization related research, the importance of such points as decision-making and using multidisciplinary design optimization for reference are emphasized. Finally, the value of SoSed design is concluded, and five directions which are worthy of .attention in this field are presented.展开更多
装备体系任务建模与仿真是对装备体系进行模型验证和分析的基础。以四元组(目标,装备,活动,关系)为基础,建立了装备体系任务的描述模型,并基于美国国防部体系结构框架(Department of Defense Archi-tecture Framework,DoDAF),提出了基...装备体系任务建模与仿真是对装备体系进行模型验证和分析的基础。以四元组(目标,装备,活动,关系)为基础,建立了装备体系任务的描述模型,并基于美国国防部体系结构框架(Department of Defense Archi-tecture Framework,DoDAF),提出了基于活动建模的装备体系任务静态模型建模方法和采用IDEF3语言来建立装备体系任务仿真模型的方法以及其具体建模步骤。最后以航母体系的典型任务为例,对上述建模与仿真方法进行应用,证明了所提方法的有效性。展开更多
In the early 1990s, Professor Qian Xuesen (Tsien HsueShen) and his colleagues proposed the Metasynthesis system approach for solving the open complex giant system problems. The method emphasizes the synthesis of colle...In the early 1990s, Professor Qian Xuesen (Tsien HsueShen) and his colleagues proposed the Metasynthesis system approach for solving the open complex giant system problems. The method emphasizes the synthesis of collected information and knowledge of various kinds of experts, and combining quantitative methods with qualitative knowledge. Later it is evolved into Hall of Workshop for Meta-Synthetic Engineering (HWMSE) which emphasizes to make use of breaking advances in information technologies. Then continuous endeavors have been taken to put those ideas into practice. With tremendous advances in networking and distributed computing technologies, past difficulties in implementation are disappearing together with farther understandings of HWMSE and fruitful results achieved in similar or relevant research fields in recent years in China. In this paper some of those development are introduced, together with some parallel research work abroad.展开更多
A Synthesis Load Model (SLM) including both the power load and the distribution network has been proposed in the references. The identifiability of SLM is analyzed at first, it is concluded that the model parameters a...A Synthesis Load Model (SLM) including both the power load and the distribution network has been proposed in the references. The identifiability of SLM is analyzed at first, it is concluded that the model parameters are identifiable if one of the resistance, reactance and the ratio of them is known. The conclusion is validated through a simulation example. A strategy for parameter identification of SLM is proposed with the combination of the component based approach and the measurement based approach. During parameter identification, only the key parameters playing very important roles in the dynamics of the load and the system are estimated, while the other parameters playing limited role are set as the default values. The proposed strategy is verified by the field measurements.展开更多
文摘航天器任务具有任务复杂、高风险、高成本、高可靠性、长周期等特点,为了适应未来更加复杂的航天器任务研制需要,在航天器设计与研制中引入了基于模型的系统工程(model-based system engineering,MBSE)方法。提出了基于模型的航天器研制流程和适应航天器研制过程需要的6类模型体系,分别为需求模型、功能模型、工艺模型、架构模型、产品模型以及验证模型。以月球水资源探测为假想任务背景,给出了MBSE建模过程及其模型,充分体现了MBSE方法在航天器设计及其集成仿真验证方面的优势。
基金supported by the Fundamental Research Funds for the Central Universities of China
文摘In order to obtain optimized flight vehicle concepts which meet system of systems （SOS） operation requirements, designers have to pay high attention to the impact of SoS at conceptual design stage since operation environment goes increasingly complex. Based on this tendency, per- spectives and progre,;ses of SoS oriented flight vehicle conceptual design, which is abbreviate as SoSed design, are reviewed in this paper. Such basic concepts of SoS as definition, characteristics, differences between systems engineering and SoS engineering, as well as SoSed design process are introduced, then SoS engineering process model for research and development of flight vehicles and SoSed design wheel model for conceptual design are proposed. Related literature is classified and analyzed in accordance with four major elements including requirements, design concept, design analysis, and trade studies and optimization： typical SoS architectures, description and quan- tization of indexes are introduced; Application of inverse design in designing concept is analyzed; Modeling and simulation （M＆S）-based methods and their applications in SoSed effectiveness evaluation are highlighted; According to SoSed trade studies and optimization related research, the importance of such points as decision-making and using multidisciplinary design optimization for reference are emphasized. Finally, the value of SoSed design is concluded, and five directions which are worthy of .attention in this field are presented.
文摘装备体系任务建模与仿真是对装备体系进行模型验证和分析的基础。以四元组(目标,装备,活动,关系)为基础,建立了装备体系任务的描述模型,并基于美国国防部体系结构框架(Department of Defense Archi-tecture Framework,DoDAF),提出了基于活动建模的装备体系任务静态模型建模方法和采用IDEF3语言来建立装备体系任务仿真模型的方法以及其具体建模步骤。最后以航母体系的典型任务为例,对上述建模与仿真方法进行应用,证明了所提方法的有效性。
基金Supported by Natural Sciences Foundation of China(NSFC Grant No.79990580),Fujitsu Chair for Science of Complex Systems and Defense Science and Technology Innovation Fund of Chinese Academy of Sciences
文摘In the early 1990s, Professor Qian Xuesen (Tsien HsueShen) and his colleagues proposed the Metasynthesis system approach for solving the open complex giant system problems. The method emphasizes the synthesis of collected information and knowledge of various kinds of experts, and combining quantitative methods with qualitative knowledge. Later it is evolved into Hall of Workshop for Meta-Synthetic Engineering (HWMSE) which emphasizes to make use of breaking advances in information technologies. Then continuous endeavors have been taken to put those ideas into practice. With tremendous advances in networking and distributed computing technologies, past difficulties in implementation are disappearing together with farther understandings of HWMSE and fruitful results achieved in similar or relevant research fields in recent years in China. In this paper some of those development are introduced, together with some parallel research work abroad.
基金supported by Scientific Funds for Outstanding Young Scientists of China (Grant No. 50725723)
文摘A Synthesis Load Model (SLM) including both the power load and the distribution network has been proposed in the references. The identifiability of SLM is analyzed at first, it is concluded that the model parameters are identifiable if one of the resistance, reactance and the ratio of them is known. The conclusion is validated through a simulation example. A strategy for parameter identification of SLM is proposed with the combination of the component based approach and the measurement based approach. During parameter identification, only the key parameters playing very important roles in the dynamics of the load and the system are estimated, while the other parameters playing limited role are set as the default values. The proposed strategy is verified by the field measurements.
