为研究挖掘机斜盘式轴向柱塞泵的压力、流量特性以及工作过程中出现供油压力不足现象的原因,结合轴向柱塞泵的工作原理,建立泵体主要部件的数学模型.利用多学科领域工程系统仿真高级建模环境(Advanced Modeling Environment for Simulat...为研究挖掘机斜盘式轴向柱塞泵的压力、流量特性以及工作过程中出现供油压力不足现象的原因,结合轴向柱塞泵的工作原理,建立泵体主要部件的数学模型.利用多学科领域工程系统仿真高级建模环境(Advanced Modeling Environment for Simulation of engineering systems,AMESim)软件,建立泵体各部件及整体仿真模型;经过连续调试、运行,合理配置参数,进行系统仿真;以柱塞泵瞬时流量最优时发动机转速和斜盘倾角参数为基准进行优化,并得到接近恒压力特性的结果.该方法可为实际设计提供理论依据和参考,缩短研发周期,加快产品的市场投入.展开更多
对某40m拖网渔船的螺旋桨特性曲线进行拟合,并通过Chebyshev多项式对特性曲线进行离散化处理。基于AMESim(advanced modeling environment for performing simulation of engineering systems)建立渔船仿真模型,将仿真结果与实船数据进...对某40m拖网渔船的螺旋桨特性曲线进行拟合,并通过Chebyshev多项式对特性曲线进行离散化处理。基于AMESim(advanced modeling environment for performing simulation of engineering systems)建立渔船仿真模型,将仿真结果与实船数据进行对比,验证该仿真模型的正确性。结果表明:在正常航行和拖网工况下,渔船的航速、推力、转矩等参数响应情况良好,船机桨网匹配合理。展开更多
Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are g...Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are gaining higher priority from CSES users when evaluating different modeling methodologies for CSES. Traditional CSES modeling methodologies are either domain-neutral (lack of domain characteristics consideration and limited support for model composability) or domain-oriented (lack of openness and evolvability) and fall short of the three NFRs. Inspired by the concept of architecture in systems engineering and software engineering fields, we extend it into a concept of model architecture for complex simulation systems, and propose a model architecture-oriented modeling methodology in which the model architecture plays a central role in achieving the three NFRs. Various model-driven engineering (MDE) approaches and technologies, including simulation modeling platform (SMP), unified modeling language (UML), domain specific modeling (DSM), eclipse modeling framework (EMF), graphical modeling framework (GMF), and so forth, are applied where possible in representing the CSES model architecture and its components' behaviors from physical and cognitive domain aspects. A prototype CSES system, called weapon effectiveness simulation system (WESS), and a non-trivial air-combat simulation example are presented to demonstrate the methodology.展开更多
文摘为研究挖掘机斜盘式轴向柱塞泵的压力、流量特性以及工作过程中出现供油压力不足现象的原因,结合轴向柱塞泵的工作原理,建立泵体主要部件的数学模型.利用多学科领域工程系统仿真高级建模环境(Advanced Modeling Environment for Simulation of engineering systems,AMESim)软件,建立泵体各部件及整体仿真模型;经过连续调试、运行,合理配置参数,进行系统仿真;以柱塞泵瞬时流量最优时发动机转速和斜盘倾角参数为基准进行优化,并得到接近恒压力特性的结果.该方法可为实际设计提供理论依据和参考,缩短研发周期,加快产品的市场投入.
文摘对某40m拖网渔船的螺旋桨特性曲线进行拟合,并通过Chebyshev多项式对特性曲线进行离散化处理。基于AMESim(advanced modeling environment for performing simulation of engineering systems)建立渔船仿真模型,将仿真结果与实船数据进行对比,验证该仿真模型的正确性。结果表明:在正常航行和拖网工况下,渔船的航速、推力、转矩等参数响应情况良好,船机桨网匹配合理。
基金supported by the National Natural Science Foundation of China(61273198)
文摘Combat system effectiveness simulation (CSES) is a special type of complex system simulation. Three non-functional requirements (NFRs), i.e. model composability, domain specific modeling, and model evolvability, are gaining higher priority from CSES users when evaluating different modeling methodologies for CSES. Traditional CSES modeling methodologies are either domain-neutral (lack of domain characteristics consideration and limited support for model composability) or domain-oriented (lack of openness and evolvability) and fall short of the three NFRs. Inspired by the concept of architecture in systems engineering and software engineering fields, we extend it into a concept of model architecture for complex simulation systems, and propose a model architecture-oriented modeling methodology in which the model architecture plays a central role in achieving the three NFRs. Various model-driven engineering (MDE) approaches and technologies, including simulation modeling platform (SMP), unified modeling language (UML), domain specific modeling (DSM), eclipse modeling framework (EMF), graphical modeling framework (GMF), and so forth, are applied where possible in representing the CSES model architecture and its components' behaviors from physical and cognitive domain aspects. A prototype CSES system, called weapon effectiveness simulation system (WESS), and a non-trivial air-combat simulation example are presented to demonstrate the methodology.
