Virtual prototype of pipe wagon articulating (PWA) system has been developed and simulated based on the kinematics and dynamics of machinery and Automatic Dynamic Analysis of Mechanical Systems (ADAMS) software. It ha...Virtual prototype of pipe wagon articulating (PWA) system has been developed and simulated based on the kinematics and dynamics of machinery and Automatic Dynamic Analysis of Mechanical Systems (ADAMS) software. It has been integrated with real-time three dimensional (3-D) system simulations for detailed and responsive interaction with dynamic virtual environments. By using this virtual model, the conceptual design examination and performance analysis of the PWA system have been realized dynamically in virtual laboratory. System dynamic force, displacement and tension of pipe have been measured through verifying this 3- D virtual prototype. By comparing the static tension and dynamic tension of pipe, the difference between the two kind tensions has been found. The simulated dynamic tension is much greater than the static tension obtained from the static theory. The results attained in this work suggest that the conceptual designed PWA system can meet the requirements of the operation.展开更多
Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based o...Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based on the multi-disciplinary heteroge- neous models has brought great challenges to the modeling and simulation （M＆S） science and technology. This paper presents a top-level modeling theory based on the meta modeling framework （M2F） of the COllaborative SIMulation （COSlM） theory of virtual prototyping to solve the problems. Firstly the fundamental prin- ciples of the top-level modeling theory are decribed to expound the premise, assumptions, basic conventions and special require- ments in the description of complex heterogeneous systems. Next the formalized definitions for each factor in top level modeling are proposed and the hierarchical nature of them is illustrated. After demonstrating that they are self-closing, this paper divides the top- level modeling into two views, static structural graph and dynamic behavioral graph. Finally, a case study is discussed to demon- strate the feasibility of the theory.展开更多
智能汽车是全球汽车产业发展的重要方向,为适应智能汽车实践教学的新需求,设计并搭建了一套智能汽车视频注入实验平台。首先,结合虚拟仿真与车载域控制器,设计了一套虚实融合的实验平台方案;其次,开发了摄像头仿真模型并进行了虚拟标定...智能汽车是全球汽车产业发展的重要方向,为适应智能汽车实践教学的新需求,设计并搭建了一套智能汽车视频注入实验平台。首先,结合虚拟仿真与车载域控制器,设计了一套虚实融合的实验平台方案;其次,开发了摄像头仿真模型并进行了虚拟标定验证,同时构建了基于GMSL2(Gigabit Multimedia Serial Link 2)与CSI-2(Camera Serial Interface 2)协议的摄像头数据链路,实现了虚拟仿真信号与车载域控制器硬件之间的有效交互;将开发环境中训练的深度学习模型进行量化与通用格式转换,并部署至车载域控制器,使其能与虚拟仿真环境实现实时交互;最后,应用建立的实验系统,为学生提供了理论与实践相结合的学习环境,帮助学生深入理解摄像头原理,并掌握多路视频信号从生成、传输到感知算法部署过程。实验结果表明,智能汽车视频注入实验系统能有效提升学生在智能汽车技术领域的实践能力和创新能力。展开更多
为解决光储联合系统储能电池荷电状态(state of charge,SOC)超出安全边界时电池加速老化,系统运行经济性差,且系统功率动态响应速度慢的问题,依据光储联合系统的运行特性,提出一种计及SOC安全边界的光储联合系统协同控制策略,当SOC达预...为解决光储联合系统储能电池荷电状态(state of charge,SOC)超出安全边界时电池加速老化,系统运行经济性差,且系统功率动态响应速度慢的问题,依据光储联合系统的运行特性,提出一种计及SOC安全边界的光储联合系统协同控制策略,当SOC达预设边界时自动切换变流器工作模式,保证系统健康运行的同时使系统具备频率支撑能力。设计一种基于模型预测控制的虚拟同步发电机(virtual synchronous generator,VSG)策略,实现对电网的惯量支撑和负荷功率需求的快速响应。通过搭建MATLAB/Simulink光储联合系统仿真模型,对储能电池SOC越限时的功频响应特性进行对比和分析,结果表明,模型预测控制相比传统双闭环控制具有更好的动态调节性能,且电池SOC始终处于预设的安全边界内。所提方法可以有效加快光储联合系统功率响应速度,提升对电网的主动支撑能力。展开更多
混合专家模型(DeepSeek-MOE)作为一种先进机器学习架构,在应对虚拟电厂(virtual power plant,VPP)中的复杂优化、预测和决策问题时展现出显著潜力,有助于提升调度和交易的智能化水平。本文基于DeepSeek-MOE的“动态专家组合+分层优化”...混合专家模型(DeepSeek-MOE)作为一种先进机器学习架构,在应对虚拟电厂(virtual power plant,VPP)中的复杂优化、预测和决策问题时展现出显著潜力,有助于提升调度和交易的智能化水平。本文基于DeepSeek-MOE的“动态专家组合+分层优化”架构,建立风、光、燃、储的多主体VPP模型,参与多元市场协同运营。通过DeepSeek-MOE赋能VPP智能化制定内部各成员的动态博弈行为,从而得到电力市场、碳市场及绿证市场中制定竞价策略与资源调配方案,实现收益最大化,解决VPP在异构资源调度、实时市场博弈、极端场景应对等方面的核心难题,成为新型电力系统下VPP的智能决策中枢。设置了四类典型场景进行算例分析,包括:风光储协同参与调峰市场、需求响应与用户舒适度平衡、极端天气下的孤岛运行及黑启动,以及电动汽车集群参与车辆到电网(vehicle to grid,V2G)四类模拟场景,解决了传统VPP的响应延迟、单一策略和市场收益低三大痛点,为VPP加速向“能源互联网”服务商转型提供理论引导。展开更多
In order to provide accurate launching pitching angular velocity（LPAV） for the exterior trajectory optimization design, multi-flexible body dynamics（MFBD） technology is presented to study the changing law of LPAV ...In order to provide accurate launching pitching angular velocity（LPAV） for the exterior trajectory optimization design, multi-flexible body dynamics（MFBD） technology is presented to study the changing law of LPAV of the rotating missile based on spiral guideway. An MFBD virtual prototype model of the rotating missile launching system is built using multi-body dynamics modeling technology based on the built flexible body models of key components and the special force model.The built model is verified with the frequency spectrum analysis. With the flexible body contact theory and nonlinear theory of MFBD technology, the research is conducted on the influence of a series of factors on LPAV, such as launching angle change, clearance between launching canister and missile,thrust change, thrust eccentricity and mass eccentricity, etc. Through this research, some useful values of the key design parameters which are difficult to be measured in physical tests are obtained. Finally,a simplified mathematical model of the changing law of LPAV is presented through fitting virtual test results using the linear regression method and verified by physical flight tests. The research results have important significance for the exterior trajectory optimization design.展开更多
文摘Virtual prototype of pipe wagon articulating (PWA) system has been developed and simulated based on the kinematics and dynamics of machinery and Automatic Dynamic Analysis of Mechanical Systems (ADAMS) software. It has been integrated with real-time three dimensional (3-D) system simulations for detailed and responsive interaction with dynamic virtual environments. By using this virtual model, the conceptual design examination and performance analysis of the PWA system have been realized dynamically in virtual laboratory. System dynamic force, displacement and tension of pipe have been measured through verifying this 3- D virtual prototype. By comparing the static tension and dynamic tension of pipe, the difference between the two kind tensions has been found. The simulated dynamic tension is much greater than the static tension obtained from the static theory. The results attained in this work suggest that the conceptual designed PWA system can meet the requirements of the operation.
基金supported by the National High Technology Research and Development Program (863 Program) (2011AA040502).
文摘Multi-disciplinary virtual prototypes of complex products are increasingly and widely used in modern advanced manufactur- ing. How to effectively address the problems of unified modeling, composition and reuse based on the multi-disciplinary heteroge- neous models has brought great challenges to the modeling and simulation （M＆S） science and technology. This paper presents a top-level modeling theory based on the meta modeling framework （M2F） of the COllaborative SIMulation （COSlM） theory of virtual prototyping to solve the problems. Firstly the fundamental prin- ciples of the top-level modeling theory are decribed to expound the premise, assumptions, basic conventions and special require- ments in the description of complex heterogeneous systems. Next the formalized definitions for each factor in top level modeling are proposed and the hierarchical nature of them is illustrated. After demonstrating that they are self-closing, this paper divides the top- level modeling into two views, static structural graph and dynamic behavioral graph. Finally, a case study is discussed to demon- strate the feasibility of the theory.
文摘智能汽车是全球汽车产业发展的重要方向,为适应智能汽车实践教学的新需求,设计并搭建了一套智能汽车视频注入实验平台。首先,结合虚拟仿真与车载域控制器,设计了一套虚实融合的实验平台方案;其次,开发了摄像头仿真模型并进行了虚拟标定验证,同时构建了基于GMSL2(Gigabit Multimedia Serial Link 2)与CSI-2(Camera Serial Interface 2)协议的摄像头数据链路,实现了虚拟仿真信号与车载域控制器硬件之间的有效交互;将开发环境中训练的深度学习模型进行量化与通用格式转换,并部署至车载域控制器,使其能与虚拟仿真环境实现实时交互;最后,应用建立的实验系统,为学生提供了理论与实践相结合的学习环境,帮助学生深入理解摄像头原理,并掌握多路视频信号从生成、传输到感知算法部署过程。实验结果表明,智能汽车视频注入实验系统能有效提升学生在智能汽车技术领域的实践能力和创新能力。
文摘为解决光储联合系统储能电池荷电状态(state of charge,SOC)超出安全边界时电池加速老化,系统运行经济性差,且系统功率动态响应速度慢的问题,依据光储联合系统的运行特性,提出一种计及SOC安全边界的光储联合系统协同控制策略,当SOC达预设边界时自动切换变流器工作模式,保证系统健康运行的同时使系统具备频率支撑能力。设计一种基于模型预测控制的虚拟同步发电机(virtual synchronous generator,VSG)策略,实现对电网的惯量支撑和负荷功率需求的快速响应。通过搭建MATLAB/Simulink光储联合系统仿真模型,对储能电池SOC越限时的功频响应特性进行对比和分析,结果表明,模型预测控制相比传统双闭环控制具有更好的动态调节性能,且电池SOC始终处于预设的安全边界内。所提方法可以有效加快光储联合系统功率响应速度,提升对电网的主动支撑能力。
文摘混合专家模型(DeepSeek-MOE)作为一种先进机器学习架构,在应对虚拟电厂(virtual power plant,VPP)中的复杂优化、预测和决策问题时展现出显著潜力,有助于提升调度和交易的智能化水平。本文基于DeepSeek-MOE的“动态专家组合+分层优化”架构,建立风、光、燃、储的多主体VPP模型,参与多元市场协同运营。通过DeepSeek-MOE赋能VPP智能化制定内部各成员的动态博弈行为,从而得到电力市场、碳市场及绿证市场中制定竞价策略与资源调配方案,实现收益最大化,解决VPP在异构资源调度、实时市场博弈、极端场景应对等方面的核心难题,成为新型电力系统下VPP的智能决策中枢。设置了四类典型场景进行算例分析,包括:风光储协同参与调峰市场、需求响应与用户舒适度平衡、极端天气下的孤岛运行及黑启动,以及电动汽车集群参与车辆到电网(vehicle to grid,V2G)四类模拟场景,解决了传统VPP的响应延迟、单一策略和市场收益低三大痛点,为VPP加速向“能源互联网”服务商转型提供理论引导。
基金supported by the Key Special Funds for National Defense Basic Scientific Research of China (No. C0320110005)
文摘In order to provide accurate launching pitching angular velocity（LPAV） for the exterior trajectory optimization design, multi-flexible body dynamics（MFBD） technology is presented to study the changing law of LPAV of the rotating missile based on spiral guideway. An MFBD virtual prototype model of the rotating missile launching system is built using multi-body dynamics modeling technology based on the built flexible body models of key components and the special force model.The built model is verified with the frequency spectrum analysis. With the flexible body contact theory and nonlinear theory of MFBD technology, the research is conducted on the influence of a series of factors on LPAV, such as launching angle change, clearance between launching canister and missile,thrust change, thrust eccentricity and mass eccentricity, etc. Through this research, some useful values of the key design parameters which are difficult to be measured in physical tests are obtained. Finally,a simplified mathematical model of the changing law of LPAV is presented through fitting virtual test results using the linear regression method and verified by physical flight tests. The research results have important significance for the exterior trajectory optimization design.
