Research on Concurrent Engineering Oriented Collab

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Research on Concurrent Engineering Oriented Collaborative Design System. The traditional serial design is far from being able to adapt to the rapidly changing market requirements. Enterprises are constantly seeking new design theories and methods. Concurrent Engineering (CE) came into being. The enterprise implements the parallel operation mechanism for starting the oil pump motor, which requires multiple tasks of design, manufacturing and other processes to be carried out at the same time and in an overlapping manner, so as to reduce the number of iterations of design through detailed calculation and analysis. The synergy of concurrent engineering makes all departments coordinate their work, and can evaluate many schemes timely and accurately to achieve the optimal scheme. Computer supported cooperative work (CSCW) is proposed under the requirements of a new working mode that multiple users on different computers work together to complete a complex problem efficiently, and has attracted more and more attention. Therefore, the scope of Computer Supported Collaborative Design for concurrent engineering covers GB, ASTM, DIN, JIS, BS... And so on. It is one of the important methods to implement concurrent engineering, and it is also the inevitable trend of development in the future

the design focus of CSCW with flexibility and fluidity features should be the customizability of the system, rather than the use of rigid structure and system strategy to achieve the purpose of collaboration. Therefore, the implementation of the system should provide sufficient flexibility mechanism

firstly, this paper analyzes the characteristics and functional requirements of concurrent engineering oriented computer collaboration, gives a system implementation hierarchy model, and focuses on the user interface customization and clipping mechanism and mapping method in collaborative design system, as well as the consistency management of shared workspace, Provide useful guidance for the open implementation of the system. 2 functional requirements of concurrent engineering oriented collaborative design system the core of concurrent engineering is concurrent integrated design, which emphasizes that product design and its related processes are carried out at the same time, that is, all links and factors involved in downstream activities such as manufacturing and assembly should be considered in the design stage. Therefore, the team members of different departments involved in the whole life cycle of the product must work together, that is, in the product design stage, not only the design team members discuss and coordinate the design tasks of the product, but also the teams of other departments such as process, manufacturing and quality should participate in the product design, such as putting forward modification opinions on the product design scheme, so as to make the design as successful as possible. The computer collaborative design supporting concurrent engineering has the following characteristics:

(1) the hierarchy of collaboration: the implementation of concurrent engineering involves the collaborative work of team members in multiple disciplines, so collaboration not only carries out interaction and collaboration among team members, but also needs collaborative work among teams

(2) synchronous and asynchronous coexist: since concurrent design of concurrent engineering is divided into inter group and intra group collaboration, the work of members in the group is closely linked, and collaboration generally requires synchronous implementation. The design work between groups may require a period of time before collaboration, so collaboration can be carried out asynchronously

(3) dynamic customization and reduction of user workspace: in concurrent engineering oriented coordinated design, small group members are interested in different aspects of product design and are constantly changing their own workspace reduction and interface customization, so the product information and interface mapping relationship between different users are constantly changing. At the same time, different groups have different concerns, so their interface and workspace settings are quite different

(4) supporting multimedia: Multimedia in concurrent engineering is divided into two categories: perceptual multimedia and applied multimedia. Perceived multimedia refers to the interaction between users through multimedia information (such as keyboard input, mouse action, image, sound and other information). These information can be directly transmitted between users and can be perceived by the other party to understand the other party's behavior intention and environmental conditions; Applied multimedia refers to the multimedia information generated by the application software (for example, there are two identification methods for the graphics, images and coaxiality errors generated by the application software: extended meter measurement method and geometric measurement method sound, etc.), which is also called virtual multimedia. They generally share the results of collaborative calculation by users at the application layer

(5) distributed knowledge base sharing and information mapping: multi-disciplinary teams under concurrent engineering have their own expert knowledge, which is maintained by each team. Different knowledge bases need different reasoning mechanisms and feature information mapping mechanisms, so that different subject groups can evaluate and make decisions on product and related process design schemes

concurrent engineering involves a wide range of collaborative content, so the CSCW system supporting concurrent engineering is much more complex than the general collaborative system, and its functional requirements are as follows:

Support collaborative awareness among multiple groups and among group members

. Support multimedia collaboration. It has the synchronous control function of perceiving multimedia to support the strength of perception

. It is open and flexible. The system shall support loading and unloading of various applications. Different users can customize and tailor their own interface and workspace environment settings and view display

. Consistency maintenance. The control mechanism and rules of consistency maintenance can be selected or programmed according to the application, especially to provide the conflict irreconcilable consistency control under the product design

. Automatic mapping of distribution data. In concurrent engineering, each team obtains different feature information of products, so it is necessary to establish an automatic conversion mechanism of product feature information among each team, so that each team can evaluate and make decisions on design schemes, and improve the efficiency of concurrent design

. Knowledge base and reasoning mechanism are shared. 3 system open framework model concurrent engineering oriented collaborative design system should provide sufficient facilities to form a collaborative environment, so that collaborative participants can use the facilities in the environment to describe collaborative requirements and customize the system, so that the system has the collaborative support facilities required by users. Therefore, effective computer support for collaborative work does not necessarily require very detailed and accurate modeling of the actual work context. The behavior of the collaborative system should be customized by users according to actual needs to meet the needs of openness and flexibility [2]. Based on the requirements of openness and flexibility, we present an open and flexible concurrent engineering oriented collaborative design system model, as shown in Figure 1. The system is divided into five parts: shared collaborative awareness, personal collaborative awareness, personal workspace, shared workspace and interface servicest0201.gif (2118</p>
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