将过程控制进行到店

常州伍杰科技软件有限公司新近推出的拥有完整自主知识产权的产品，《软件数据管理系统USDM》，为CMMI的推行提供了一个较为完整的解决方案。在该解决方案中，首次提出“管理作业”和“车间作业”的概念，这样，既将管理流程和生产作业做了适当的分离，又保持它们的衔接关系。实际上，管理作业实现了（也可以基于其它标准模型，如ISO）CMMI过程改进和管理模型的流程化管理，     

将过程控制进行到店

常州伍杰科技软件有限公司新近推出的拥有完整自主知识产权的产品，《软件数据管理系统USDM》，为CMMI的推行提供了一个较为完整的解决方案。在该解决方案中，首次提出“管理作业”和“车间作业”的概念，这样，既将管理流程和生产作业做了适当的分离，又保持它们的衔接关系。实际上，管理作业实现了（也可以基于其它标准模型，如ISO）CMMI过程改进和管理模型的流程化管理，     

机械系统仿真模型技术的研究

在对机械系统产品的仿真特点和存在问题分析的基础上,引出了协同仿真环境的概念.针对机械产品仿真过程的特点和要求,提出了协同仿真环境的系统建模模型--统一仿真模型(unified simulation model,USM),并对USM定义、组织、视图转换及运行机制进行了详细论述.最后将该建模技术应用在某悬挂系统中,证明该技术在工程实际应用中具有可行性.     

基于组件的机械仿真架构及流程控制技术研究

为了协同实现仿真作业的真正流程化,在分析典型工作流应用系统框架基础上,建立了CSE体系框架.结合组件开发思想,提出了仿真组件的概念;根据机械仿真的特点,引入虚拟网络计算(Virtual Network Computing,VNC)技术.项目开发进度表明,该框架对于机械仿真需求变化有强大的适应能力,整体结构清晰,组件化的方法明显提高了系统的适应性和灵活性.     

基于EMF和GEF的机械产品仿真流程建模

利用基于Eclipse的Eclipse建模框架(EMF)和图形编辑框架(GEF)技术建立机械产品仿真流程建模平台。介绍2种技术及开发实现过程,合理协调了2种技术之间不同的命令堆栈,使得GEF能够调用EMF产生的模型,并用编辑工具完成了对机械产品静力学仿真流程的建模。     

基于HLA的多领域协同仿真模型集成研究

研究复杂产品协同仿真开发过程中的仿真模型集成问题。联合使用松散耦合与紧密耦合技术,设计一种缓冲池实现机制。以高层体系结构为软总线,利用分布式数据库、文件模拟数据库和XML技术,统一不同领域软件的仿真模型定义规范。转化后的模型数据在协同仿真的软件间交互,数据库与文件存储在协同仿真过程中起到缓冲作用。采用面向服务架构的方式构建子模块,将各领域仿真软件松散耦合到虚拟样机协同仿真平台中。以热控电动百叶窗机构机电联合仿真为例,分别进行集中式仿真和协同仿真分析。结果表明,该方法能提高协同仿真的速度与精度。     

仿真工程管理系统研究

仿真系统中存在不同的应用目的,涉及多种仿真想定、模型、数据、评估等内容,在多用户情况下仿真资源缺乏统一的管理,会严重影响了仿真系统的使用效率;为了提升仿真系统的使用效率,文章提出一种仿真工程管理的方法,利用共享内存实时采集MOM数据实现对邦员负载信息的有效监控;通过服务器统一收集XML格式仿真联邦运行数据和监控日志实现仿真运行回放;通过构建通用模型接口和评价体系实现了基于Web的仿真评估;基于B/S架构构建了仿真工程管理系统,可将模型和数据以仿真工程为单位进行统一管理,实现了对仿真运行的统一监控、数据的统一的收集与管理、评估模型管理和基于仿真试验数据的仿真评估,从而提高仿真系统的使用效率,减少仿真应用系统的集成工作量。     

ANSYS 9．0新功能

ANSYS9．0是第一个在ANSYS Workbench产品研发平台上整合了电磁、计算流体动力学以及网格划分技术的软件，作为CAE仿真技术领袖软件的重要升级，ANSYS9．0延续了Workbench发展思路，在产品研发流程仿真技术上有了质的飞跃。Workbench现代化的易用架构大幅度地减少了由于手动传输数据．转换计算结果、重复分析所需要的时间和金钱，提高了公司的生产率。为了使用户将仿真技术更好地运用于研发流程，ANSYS9．0在延伸了以往的核心特征的基础上提供了更强大的设计能力，同时在机械，计算流体动力学、高频电磁和多物理场耦合领域有了瞩目的发展，从而大大拓展了工程仿真的应用领域。     

CAE：从工具到平台

工程模拟仿真软件CAE一直停留在工具型技术层面,在国内的发展缓慢,而安世亚太自主研发的企业级协同仿真平台PERA,将平台技术引入了CAE领域,为CAE领域注入了新的活力。     

基于多学科协同的某锁机构系统故障仿真

为解决机电液耦合的复杂运动机构系统的故障仿真问题,提出一种基于多学科软件协同的故障仿真分析方法.通过软件接口建立机构系统基于多学科协同的仿真模型.将相关故障模式影响因素注入机构系统仿真模型,仿真分析其对系统参数的影响.某锁机构系统的上锁故障仿真分析表明,该方法对工程实际复杂运动机构系统有效可行.该故障仿真方法有助于提高机械产品可靠性,也可为复杂机械系统的故障机理分析、故障诊断和维修等提供数据支持。     

组件式机械仿真流程建模平台的设计与实现

在具体分析WFMC规范基础上,结合组件开发思想,采用Java语言,利用EMF和GEF技术,根据仿真流程实际需要抽象成仿真组件,实现了组件式机械仿真流程建模平台,并简要介绍了流程在执行期间的状态表示机制.根据抽象出的13个静力学仿真组件,利用此建模平台完成了针对机械产品静力学仿真流程模型的建立,并从语法上对流程进行了有效性检验,证明了平台的适用性和灵活性.     

Virtual engineering at work: the challenges for designing mechatronic products

The product race has become an innovation race, reconciling challenges of branding, performance, time to market and competitive pricing while complying with ecological, safety and legislation constraints. The answer lies in “smart” products of high complexity, relying on heterogeneous technologies and involving active components. To keep pace with this evolution and further accelerate the design cycle, the design engineering process must be rethought. The paper presents a mechatronic simulation approach to achieve this goal. The starting point is the current virtual prototyping paradigm that is widely adopted and that continues to improve in terms of model complexity, accuracy, robustness and automated optimization. Two evolutions are discussed. A first one is the extension to multi-physics simulation answering the design needs of the inherent multi-disciplinarity of “intelligent” products. Integration of thermal, hydraulic, mechanical, haptic and electrical functions requires simulation to extend beyond the traditional CAD-FEM approach, supporting the use of system, functional and perception models. The second evolution is the integration of control functions in the products. Where current industrial practice treats mechanical system design and control design as different design loops, this paper discusses their integration in a model-based design process at all design stages, turning concepts such as software-in-the-loop and hardware-in-the-loop into basic elements of an industrial design approach. These concepts are illustrated by a number of automotive design engineering cases, which demonstrate that the combined use of perception, geometric and system models allows to develop innovative solutions for the active safety, low-emission and high-comfort performance of next-generation vehicles. This process in turn poses new challenges to the design in terms of the specification and validation of such innovative products, including their failure modes and fault-tolerant behaviour. This will imply adopting a model-based system engineering approach that is currently already common practice in software engineering.     

机械产品协同仿真环境及其关键技术

机械产品设计阶段产品性能仿真分析的广泛应用要求对仿真流程和仿真数据进行有效管理.提出了协同仿真环境的解决方案,并分析了其功能框架和体系结构,研究了基于XML的多层次仿真数据管理技术进行仿真数据的分类和层次化管理、基于工作流管理技术的仿真流程控制技术进行仿真流程的管理等关键技术.在解决方案及其关键技术的基础上,开发了某悬挂系统协同仿真环境的流程建模平台和Web门户,可大幅缩短产品仿真周期并有效提高产品设计效率.应用实例验证了方法的有效性.     

The use of semantic networks to support concurrent engineering in semiconductor product development

The design of semiconductor devices is an extremely complex and costly process. Numerous design and test iterations are typically necessary to finally complete a successful device. Competition in the industry has forced semiconductor manufacturers to reduce design cycle times and costs. One method now being used to accomplish these objectives is concurrent engineering. This paper will review how concurrent engineering is being integrated into semiconductor device development and how artificial intelligence-based models will support concurrent engineering implementation. Major changes are needed in design simulation, methods of knowledge sharing, and incorporating best practices. A semantic network is proposed that retains the knowledge of a product in a central repository as various engineers contribute to the product's development. The knowledge contained in this central repository can be referenced for applicability by engineers during product design, development, and production.     

Geometric skeleton computation enabling concurrent product engineering and assembly sequence planning

This paper introduces a novel modelling approach to geometric skeleton computation enabling concurrent product engineering and assembly sequence planning. Current engineering vision has recently moved towards new modelling and management paradigms to maintain competitive edges all along the product lifecycle. Consistent with concurrent engineering and design for X stakes, this recent shift promotes cross-X and knowledge-intensive philosophies in the product development process, principally focused on lifecycle engineering.The main objective of this research is to integrate assembly process engineering information and knowledge in the early phases of the product development process in a top-down and proactive manner, in order to provide a geometric skeleton-based assembly context for designers. The definition of the product and its related assembly sequence requires both the enhancement and the entire understanding of product relationships between the various product components, and its related assembly rationale. As a consequence, this new modelling approach highlights the need to integrate various stakeholders’ viewpoints involved in the beginning of the product lifecycle. In such a context, earlier work has achieved the early generation of an optimal assembly sequence in the product development process, before the product geometry is completely defined. As a result, previous research has made possible to control and bind the product modelling phase through an assembly oriented product structure.The aim of the proposed approach is to compute and define a geometric skeleton model based on product relational information and the early-defined assembly sequence. The proposed approach–called SKeLeton geometry-based Assembly Context Definition (SKL-ACD)–enables the control of the product modelling phase by introducing skeleton entities consistent with product relationships and assembly sequence planning information. A prototype application within a CAD tool has been developed for aiding geometric skeleton computation and generation. Lastly, an industrial case study is introduced to highlight the feasibility and the relevance of the proposed modelling approach.     

复杂机械产品多Agent协同仿真研究

协同仿真是协同设计过程中的重要组成部分,成为检验、指导和优化设计的重要手段。车辆动力系统是一种典型的复杂机械产品。文章为解决协同仿真中复杂的交互通信问题,以动力系统为例,应用多Agent技术,研究复杂机械产品多Agent协同仿真的模型和方法。在分析了动力系统协同仿真的业务需求的基础上,提出了一种适合动力系统协同仿真的多Agent结构模型,Agent之间的通信方式采用KQML/XML,并以曲轴的静力学分析为例说明实现方法。     

Multibody system dynamics simulator for process simulation of ships and offshore plants in shipyards

Since various existing simulation tools based on multibody system dynamics focus on conventional mechanical systems, such as machinery, cars, and spacecraft, there are some problems with the application of such simulation tools to shipbuilding domains due to the absence of specific items in the field of naval architecture and ocean engineering, such as hydrostatics, hydrodynamics, and mooring forces. Thus, in this study, we developed a multibody system dynamics simulator for the process simulation of ships and offshore structures. We based the simulator on six kernels: the multibody system dynamics kernel, the force calculation kernel, the numerical analysis kernel, the hybrid simulation kernel, the scenario management kernel, and the collision detection kernel. Based on these kernels, we implemented a simulator that had the following Graphic User Interfaces (GUIs): the modeling, visualization, and report GUIs. In addition, the geometric properties of blocks and facilities in shipyards are needed to configure the simulation for the production of ships and offshore plants, so these are managed in a database and connected to a specific commercial CAD system in shipyards. We used the simulator we developed in various cases of the process simulation of ships and offshore plants. The results show that the simulator is useful for various simulations of operations in shipyards and offshore industries.     

A digital twin-based multidisciplinary collaborative design approach for complex engineering product development

With the ever-increasing demand for personalized product functions, product structure becomes more and more complex. To design a complex engineering product, it involves mechanical, electrical, automation and other relevant fields, which requires a closer multidisciplinary collaborative design (MCD) and integration. However, the traditional design method lacks multidisciplinary coordination, which leads to interaction barriers between design stages and disconnection between product design and prototype manufacturing. To bridge the gap, a novel digital twin-enabled MCD approach is proposed. Firstly, the paper explores how to converge the MCD into the digital design process of complex engineering products in a cyber-physical system manner. The multidisciplinary collaborative design is divided into three parts: multidisciplinary knowledge collaboration, multidisciplinary collaborative modeling and multidisciplinary collaborative simulation, and the realization methods are proposed for each part. To be able to describe the complex product in a virtual environment, a systematic MCD framework based on the digital twin is further constructed. Integrate multidisciplinary collaboration into three stages: conceptual design, detailed design and virtual verification. The ability to verify and revise problems arising from multidisciplinary fusions in real-time minimizes the number of iterations and costs in the design process. Meanwhile, it provides a reference value for complex product design. Finally, a design case of an automatic cutting machine is conducted to reveal the feasibility and effectiveness of the proposed approach.     

基于数值模拟技术的产品概念设计方法

为解决传统工业设计流程中,设计方案缺乏相应工程技术的校验,导致设计返工 率高及开发效率低下的问题,借助于数值模拟技术可实现产品性能预评估的优势,提出一种基 于数值测试技术为驱动的产品概念设计方法。首先对产品的工作机理进行数值分析,明确合理 的设计方向,并以此为基础指导产品造型设计,然后再次运用数值测试分析手段对设计方案的 可行性进行验证,最后对通过验证的方案进行细节完善并输出最终设计概念。数值模拟技术与 产品概念设计过程相融合,驱动设计过程的逐步完善,可实现提升设计效率与质量的目的,通 过电热毛巾架的设计实例验证了方法的有效性。     

Expanding bottleneck management from manufacturing to product design and engineering processes

Bottlenecks inhibit the performance of companies. Up to now, bottleneck management research has concentrated on manufacturing processes, while neglecting product design and engineering processes. This research fills this gap through developing and testing of a new bottleneck management concept for product design and engineering processes. The new concept is developed using a system theory modelling approach and comprises of four bottleneck management counter measures. Two propositions were developed to test the concept through an event-discrete simulation model. The simulation is grounded on empirical data from three design-driven companies and tests the impact of the four bottleneck management counter measures on the performance of product design and engineering processes. The findings from the simulation confirm the applicability of the newly developed bottleneck concept to improve the performance of product design and engineering processes. In doing so, this research study expands bottleneck management for the first time from manufacturing to product design and engineering processes.