Unlike traditional propeller-driven underwater vehicles,blended-wing-body underwater gliders(BWBUGs)achieve zigzag gliding through periodic adjustments of their net buoyancy,enhancing their cruising capabilities while...Unlike traditional propeller-driven underwater vehicles,blended-wing-body underwater gliders(BWBUGs)achieve zigzag gliding through periodic adjustments of their net buoyancy,enhancing their cruising capabilities while mini-mizing energy consumption.However,enhancing gliding performance is challenging due to the complex system design and limited design experience.To address this challenge,this paper introduces a model-based,multidisciplinary system design optimization method for BWBUGs at the conceptual design stage.First,a model-based,multidisciplinary co-simulation design framework is established to evaluate both system-level and disciplinary indices of BWBUG performance.A data-driven,many-objective multidisciplinary optimization is subsequently employed to explore the design space,yielding 32 Pareto optimal solutions.Finally,a model-based physical system simulation,which represents the design with the largest hyper-volume contribution among the 32 final designs,is established.Its gliding perfor-mance,validated by component behavior,lays the groundwork for constructing the entire system’s digital prototype.In conclusion,this model-based,multidisciplinary design optimization method effectively generates design schemes for innovative underwater vehicles,facilitating the development of digital prototypes.展开更多
This work was focused on the model-based design method of two-axis four-actuator(TAFA) fast steering mirror system(FSM), in order to improve the design efficiency. The structure and operation principle commonality of ...This work was focused on the model-based design method of two-axis four-actuator(TAFA) fast steering mirror system(FSM), in order to improve the design efficiency. The structure and operation principle commonality of normal TAFA FSM were investigated. Based on the structure and the commonality, the conditions of single-axis idea, high-frequency resonance and coupling were modeled gradually. Combining these models, a holonomic system model was established to reflect and predict the performance of TAFA FSM. A model-based design method was proposed based on the holonomic system model. The design flow and design concept of the method were described. In accordance with the method, a TAFA FSM was designed. Simulations and experiments of the FSM were done, and the results of them were compared. The compared results indicate that the holonomic system model can well reflect and predict the performance of TAFA FSM. The bandwidth of TAFA FSM is more than 250 Hz; adjust time is less than 15 ms;overshoot is less than 8%; position accuracy is better than 10 μrad; the FSM prototype can satisfy the requirements.展开更多
针对复杂算法在PLC运动控制系统中难以工程实现的问题,该文提出了一种基于MBD(model based design)的系统设计和应用方法。首先,利用MATLAB/Simulink建立控制模型并仿真验证,预留变量接口,正确匹配参数定义和数据类型;然后,基于Simulink...针对复杂算法在PLC运动控制系统中难以工程实现的问题,该文提出了一种基于MBD(model based design)的系统设计和应用方法。首先,利用MATLAB/Simulink建立控制模型并仿真验证,预留变量接口,正确匹配参数定义和数据类型;然后,基于Simulink PLC Coder将模型转换为符合IEC 61131-3标准的结构化文本ST(structure text)代码,根据集成开发环境CoDeSys定制文件格式;最后,将生成代码以功能块FB(function block)的形式导入CoDeSys,实现算法与应用程序的集成。某型起重机回转控制系统的应用证明了MBD方法可有效解决复杂算法工程实现难的问题。展开更多
针对目前三维零件工艺审查过程中存在的问题,进行MBD设计模型的工艺性审查研究。利用Pro/E为支撑软件,在Visual Studio 2005软件的编译环境中,通过编程调用Pro/Toolkit工具中的函数,对Pro/E软件进行二次开发,实现MBD设计模型工艺信息的...针对目前三维零件工艺审查过程中存在的问题,进行MBD设计模型的工艺性审查研究。利用Pro/E为支撑软件,在Visual Studio 2005软件的编译环境中,通过编程调用Pro/Toolkit工具中的函数,对Pro/E软件进行二次开发,实现MBD设计模型工艺信息的识别、提取、修改和存储等功能。对于工艺审查的研究能极大地降低工艺人员的工作量,提高MBD设计模型的工艺审查效率。展开更多
基于模型的定义(Model Based Definition,MBD)技术是数字化设计制造领域的新趋势。为了加强实现MBD技术在产品全生命周期的协同设计与制造的应用,提高机加工艺可靠性,减少工艺更改繁琐等问题,文中研究与探讨了MBD模式下机械加工工艺新...基于模型的定义(Model Based Definition,MBD)技术是数字化设计制造领域的新趋势。为了加强实现MBD技术在产品全生命周期的协同设计与制造的应用,提高机加工艺可靠性,减少工艺更改繁琐等问题,文中研究与探讨了MBD模式下机械加工工艺新方法。以MBD模型作为设计制造工作流传递的单一数据源,设计模型的更改可以单项连接传递到工艺模型中,从而简化设计流程,减少大量更改单的输入输出,缩短产品研发周期,节约研制成本。展开更多
为解决MBD技术在航空发动机设计应用中的标准规范不统一和标注信息管理等问题,结合行业特点,制订了独特的通用+典型零部件MBD行业标准,同时,考虑到知识信息表达和多领域应用,提出了基于视图的标注信息(Definition Based Model Views-DB...为解决MBD技术在航空发动机设计应用中的标准规范不统一和标注信息管理等问题,结合行业特点,制订了独特的通用+典型零部件MBD行业标准,同时,考虑到知识信息表达和多领域应用,提出了基于视图的标注信息(Definition Based Model Views-DBMV)管理方法,使得3维MBD模型成为惟一有效的知识信息数据源贯穿应用于产品的全生命周期,成功将MBD技术工程化应用于航空发动机结构设计中。展开更多
针对当前工序MBD(Model Based Definition,基于模型的定义)模型生成中存在的问题,提出了一种基于参数化驱动的自动生成方法。首先分析了工艺MBD模型与工序MBD模型的相互关系。结合三维工艺设计系统与三维产品设计系统,详细阐述了参数化...针对当前工序MBD(Model Based Definition,基于模型的定义)模型生成中存在的问题,提出了一种基于参数化驱动的自动生成方法。首先分析了工艺MBD模型与工序MBD模型的相互关系。结合三维工艺设计系统与三维产品设计系统,详细阐述了参数化驱动生成工序MBD模型的操作流程;在此基础上,提出了按逆序方式驱动生成各道工序的工序MBD模型时对应驱动参数值的计算流程。同时,论述了三维工艺设计系统的功能框架及其信息模型。最后用实例证明工序MBD模型可以通过参数化驱动实现自动生成。展开更多
基金supported by the Postdoctoral Fellowship Program of CPSF(Grant No.GZC20242194)the National Natural Science Foundation of China(Grant Nos.52175251 and 52205268)+1 种基金the Industry Key Technology Research Fund Project of Northwestern Polytechnical University(Grant No.HYGJXM202318)the National Basic Scientific Research Program(Grant No.JCKY2021206B005).
文摘Unlike traditional propeller-driven underwater vehicles,blended-wing-body underwater gliders(BWBUGs)achieve zigzag gliding through periodic adjustments of their net buoyancy,enhancing their cruising capabilities while mini-mizing energy consumption.However,enhancing gliding performance is challenging due to the complex system design and limited design experience.To address this challenge,this paper introduces a model-based,multidisciplinary system design optimization method for BWBUGs at the conceptual design stage.First,a model-based,multidisciplinary co-simulation design framework is established to evaluate both system-level and disciplinary indices of BWBUG performance.A data-driven,many-objective multidisciplinary optimization is subsequently employed to explore the design space,yielding 32 Pareto optimal solutions.Finally,a model-based physical system simulation,which represents the design with the largest hyper-volume contribution among the 32 final designs,is established.Its gliding perfor-mance,validated by component behavior,lays the groundwork for constructing the entire system’s digital prototype.In conclusion,this model-based,multidisciplinary design optimization method effectively generates design schemes for innovative underwater vehicles,facilitating the development of digital prototypes.
基金Projects(51135009)supported by the National Natural Science Foundation of China
文摘This work was focused on the model-based design method of two-axis four-actuator(TAFA) fast steering mirror system(FSM), in order to improve the design efficiency. The structure and operation principle commonality of normal TAFA FSM were investigated. Based on the structure and the commonality, the conditions of single-axis idea, high-frequency resonance and coupling were modeled gradually. Combining these models, a holonomic system model was established to reflect and predict the performance of TAFA FSM. A model-based design method was proposed based on the holonomic system model. The design flow and design concept of the method were described. In accordance with the method, a TAFA FSM was designed. Simulations and experiments of the FSM were done, and the results of them were compared. The compared results indicate that the holonomic system model can well reflect and predict the performance of TAFA FSM. The bandwidth of TAFA FSM is more than 250 Hz; adjust time is less than 15 ms;overshoot is less than 8%; position accuracy is better than 10 μrad; the FSM prototype can satisfy the requirements.
文摘针对目前三维零件工艺审查过程中存在的问题,进行MBD设计模型的工艺性审查研究。利用Pro/E为支撑软件,在Visual Studio 2005软件的编译环境中,通过编程调用Pro/Toolkit工具中的函数,对Pro/E软件进行二次开发,实现MBD设计模型工艺信息的识别、提取、修改和存储等功能。对于工艺审查的研究能极大地降低工艺人员的工作量,提高MBD设计模型的工艺审查效率。
文摘基于模型的定义(Model Based Definition,MBD)技术是数字化设计制造领域的新趋势。为了加强实现MBD技术在产品全生命周期的协同设计与制造的应用,提高机加工艺可靠性,减少工艺更改繁琐等问题,文中研究与探讨了MBD模式下机械加工工艺新方法。以MBD模型作为设计制造工作流传递的单一数据源,设计模型的更改可以单项连接传递到工艺模型中,从而简化设计流程,减少大量更改单的输入输出,缩短产品研发周期,节约研制成本。
文摘为解决MBD技术在航空发动机设计应用中的标准规范不统一和标注信息管理等问题,结合行业特点,制订了独特的通用+典型零部件MBD行业标准,同时,考虑到知识信息表达和多领域应用,提出了基于视图的标注信息(Definition Based Model Views-DBMV)管理方法,使得3维MBD模型成为惟一有效的知识信息数据源贯穿应用于产品的全生命周期,成功将MBD技术工程化应用于航空发动机结构设计中。
文摘针对当前工序MBD(Model Based Definition,基于模型的定义)模型生成中存在的问题,提出了一种基于参数化驱动的自动生成方法。首先分析了工艺MBD模型与工序MBD模型的相互关系。结合三维工艺设计系统与三维产品设计系统,详细阐述了参数化驱动生成工序MBD模型的操作流程;在此基础上,提出了按逆序方式驱动生成各道工序的工序MBD模型时对应驱动参数值的计算流程。同时,论述了三维工艺设计系统的功能框架及其信息模型。最后用实例证明工序MBD模型可以通过参数化驱动实现自动生成。
