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The product innovation design platform business model based on knowledge management is based on the above planning and design ideas, and puts forward the overall framework of the product innovation design platform based on knowledge management: adopting Web-based product data management concept, combining JSP and ActiveX control technology in software The UI layer of the user interface adopts a Web-based 3-tier management structure (B/S structure) to build a platform for implementing knowledge management, making it compatible with traditional PDM functions, integrating enterprise CAX software, and Based on the realization of the company's innovative design expert system, has important significance. Based on the design goals of the project, the following business model (as shown) was proposed. In order to fully ensure the system's requirements in terms of security, cross-platform, easiness, and ease of maintenance, it is proposed to adopt an advanced three-tier application architecture based on the JAVA platform. The system is based on the B/S 3 layer application system. Above the structure, and using programming techniques such as JSP, Servlet, EJB, XM L, and object-oriented programming techniques, the complex business processing logic, process control logic, and data access logic are implemented through Enterprise Java Beans components and run on Above the application server, it implements rapid deployment and flexible adjustment of business logic, and implements access to the database through dedicated components deployed at the application server layer to fully ensure secure and reliable access to the database system.
The technical cores for building a system development and operating environment are summarized as follows: a. Adopt a multi-tier architecture B/S structure. In this way, software modules are configurable and can quickly organize a distributed knowledge management platform according to the needs of enterprises. Software upgrades are relatively simple and can effectively reduce costs and ensure the effectiveness of software.
b. Using JAVA language technology, distributed computing technology based on J2EE technology for system architecture design and system development; using Web Service technology; application server () using JRUN or T OM CAT; the system can have good cross-platform performance.
c. Adopt Oracle database. Considering the large amount of data and complex transaction processing, large object storage and global retrieval are required. Oracle Database is adopted in terms of performance and efficiency; and XM L is used as the data exchange standard for system interfaces to integrate information resources.
d. Use component technology to provide rapid system development and updates.
The basic service components of the framework support the basic services of the business layer.
Using MVC mode, business logic is encapsulated in the business layer. Client requests are controlled by the distribution processor of the control layer to invoke different services to respond. Security checks or other filtering functions can be dynamically adjusted, enhancing system scalability and availability. Maintainability.
1. 2 functional design of knowledge management platform The knowledge resources of the design department of an enterprise are mainly of two types: one is explicit knowledge, mainly exists in an external form, and mainly includes digital model of product design, graphic files, Design descriptions, test analysis reports, etc.; a kind of tacit knowledge, which mainly exists in the brains of designers, reflects a kind of business quality, design intuition, design experience, and so on. From the perspective of the impact on innovative design, it can be divided into two categories: one is the professional business knowledge that supports the core business; the other is the knowledge of the business organization and management that supports innovative design. Therefore, the business function of the product innovation design platform based on knowledge management (KM) proposed in this paper consists of two parts: First, the management of enterprise knowledge resources, including explicit knowledge of system management, tacit knowledge through expert system knowledge base And the case base for in-depth excavation; Second, the management of the company's design department to reengineering the process, making the project management process flat, visual, and collaborative. Therefore, the main business functions of the platform are as follows.
Product data management. Establish a unified electronic database of the whole plant to achieve enterprise-level product data sharing. By setting appropriate permissions, document management and product structure tree management can be used to classify folders according to the stage of product design to achieve classification management of image files. The search function can quickly and easily use the graph file attributes, product or component node attributes to query various product data. At the same time, dynamic addition, deletion, and review functions can be performed to facilitate the expansion and maintenance of product data. At the same time, this management system can greatly reduce the time spent on paper documents in the enterprise design process, reduce the number of documents scattered among individual technicians' personal computers, improve the efficiency of retrieval and borrowing, and reduce the risk of product data loss. . This is the core business function of the traditional product data management PDM software system.
The product data management organization diagram is as shown.
The platform uses the project and process management as the engine, and the technology center designs the source of resource management for the entire enterprise, and organizes and manages new product designs according to the project. The chief engineer will set up the project on the platform, and the project development task will be completed under the director's division. The chief division teacher will take this task after receiving the master's development task! project? Refine and decompose, and at the same time, send each subtask to the engineer; each engineer platform can easily see the automatically displayed Director's assigned to his project task. Based on the innovative design of the braking system, this system analyzes the design and analysis of mechanical brakes and the reengineering of project management processes for the development and design of ABS. Shown are the business processes for the enterprise's innovative design and performance analysis.
Through the workflow engine, the platform realizes the visual monitoring of the business process. It can create, execute, supervise and control the work process, so that the chief engineer, the chief division engineer and the engineer can coordinate the work in parallel. In the process of designing, the design results of the collaborative staff can be viewed in real time, and the managed data resources in the system can be conveniently inherited and utilized to realize the real sense! Resource Sharing? with! Collaborative work? The chief instructor and the chief division can monitor the progress of the project in real time on the platform and make timely adjustments to the corresponding departments.
Through the permission configuration management of the flow engine, different operating rights of different access objects are limited to achieve the purpose of data access security management. Three types of user rights are mainly provided on this platform: chief teacher, chief teacher, and engineer. Among them, the engineer's authority is the lowest, he directly carries on the product design and the analysis; The director division is in charge of each engineer's task assignment and the coordination work apart from having all the authority of the engineer; The chief division has the highest authority, except has the director division and the engineer In addition to all its rights, it is also responsible for formulating product development plans, holding technical meetings, and approving new product trials and experimental tasks.
The platform provides the operation interface, which can completely establish the corresponding personnel organization according to the actual organizational structure of the enterprise. System administrators can easily add, delete, and change user permissions and project team personnel.
The platform regards the product as the management object in the system. Each object stores all the relevant data in the entire life cycle of the product (such as the design task book, program feasibility report, manual, design model, craft file, temporary file, and change Single, product graphic information, various types of experimental data, and experimental reports, etc.) All these data are managed, stored, and backed up on the server to ensure product data security. At the same time, it is possible to manage and record the version and version change information of image files. Realize the electronic product management of product drawings, record the change history of each type of component and assembly, and the system automatically prompts the affected area after the image file or product node is changed to remind technicians how to borrow the product from other products. Processing (synchronous changes or left as is).
Therefore, for manufacturing companies, the above functions realize the integration of knowledge, reflect the idea of ​​collaborative design, and design the requirements for manufacturing. This platform fully manages the explicit knowledge of the company and the process management of innovative design. know how. However, the exploration and use of tacit knowledge needs to be realized by means of an expert system.
2 Solution of Expert System In the process of innovative design, expert knowledge is primary knowledge in the expert system, but the designer is not only the acquirer and user of knowledge, but also the owner and creator of knowledge. To this end, we must study the process of excavation of knowledge by expert systems, and at the same time we must study the expansion of knowledge and self-learning of the system in the design process.
Excavation and application of knowledge Through the establishment of the underlying PDM platform, the management of existing explicit knowledge resources of the enterprise can be realized, and knowledge sharing can be achieved directly through the query, retrieval and browsing provided by the platform. With the integration of expert knowledge of the knowledge base and the case library system, the design staff's tacit knowledge is automatically obtained through the case base. The process of excavation and application of knowledge is shown in 4.
For an innovative design system based on knowledge management, the transformation of knowledge must be considered, and the tacit knowledge must be converted into explicit knowledge for use by designers. In this design practice process, new tacit knowledge will be acquired. At this time, the system must be able to automatically discover these tacit knowledge as much as possible and further externalize it. Such a spiral cycle process will gradually increase the number of companies. The level of design.
The excavation and application of knowledge are achieved through the construction of knowledge bases and the construction of case bases. Engineers and technicians create innovative designs with knowledge bases and case bases, obtain successful design results and generate cases directly and dynamically, and automatically expand into expert system case bases, thereby passing product data generated by tacit knowledge contained in them. Externalization of documents and design processes.
The expert system knowledge base is constructed using an object-oriented approach to build the knowledge base. The knowledge base system is composed of basic parts such as knowledge base, knowledge base management organization, knowledge acquisition system and human-computer interaction interface. Knowledge representation, knowledge utilization, and knowledge acquisition are the three key technical issues in the knowledge base system implementation. As shown in the logical block diagram of the knowledge system of the braking system, the main functional modules of the knowledge base system include the establishment of a knowledge base, knowledge acquisition and update, knowledge base retrieval, query and maintenance, and knowledge consistency Sex and integrity checks.
Through the support of the expert system, the product innovation design of a certain project is completed. After this design passes the trial production, the test verification, and the official production, the case library management system can, based on the project number, put all the relevant design drawings, documents, etc. Directly transferred to the case base for future reference for the design, so as to achieve the accumulation of knowledge.
The case library system reproduces the design analysis process online by means of parameter matching, thereby making the design method, design process, and other implicit knowledge external to the design process and providing direct reference to the designers.
The software-integrated solution CAX software's decentralized and independent model has caused the company's software investment is too large, especially the investment of 3D CAD software and CAE software, which is undoubtedly a huge investment for enterprises that want to improve their core competitiveness. This investment also implies a risk. The use of ActiveX controls visualizes the various types of documents generated by these software, which greatly reduces the software investment and, more importantly, realizes the integration of knowledge under a unified platform.
ActiveX technology enables applications to not only share data but also share each other's capabilities. Sharing is achieved by sharing programmable binary objects between applications. An application that supports ActiveX technology can instantiate an object published by an application, and invoke the properties and methods of the object to achieve the functions provided by the object. Using the ARX development kit provided by Autodesk, a loadable CAD control was developed under VC to import the schedule information on the drawing into an Excel file. This control is automatically loaded at the same time as the CAD is opened. The operation button is provided in the toolbar. If the user's CAD is a detailed list made according to the unified rules, it can be directly imported into the Excel file to facilitate the formation of the product data BOM, and then Import the organized BOM into the system. The business process is as shown.
According to the company's needs, we have customized controls that allow CAD, UG, and Pretel software to browse in the Web mode. This enables browsing, zooming, rotating, moving, and printing of graphics files generated by these three types of software in Web mode. . The realization of these functions does not require the conversion of the files, and therefore the operation efficiency and user-friendliness are high. The mode of operation of the system is as shown.
Conclusion A workflow-based management model was proposed, with product data management as the core, and a collaborative design platform for the project. Through the data management platform and expert system, the manufacturing-oriented design concept is realized, and the explicit knowledge and tacit knowledge existing in the enterprise are adopted. PDM and expert systems are adopted respectively, intelligent management is performed, and external knowledge is fully realized. Visualization and visualization for all designers. Using ActiveX controls, the visualization of various types of documents generated by CAX software under IE mode was developed. This greatly reduces the software investment, and more importantly, it realizes the integration of knowledge under a unified platform. Through the research of these key technologies and the implementation of solutions, a systematic solution for enterprise-based Web-based collaborative design has been proposed and this concept has been realized. A product innovation design platform based on knowledge management has been established. Currently, this system is Car brake system production companies implement. Because the system has a modular structure, it can be easily promoted and implemented to other auto parts manufacturing companies, and has a good application prospect.
Composed Type Air Handling Unit
Compased type air handling unit
Air flow 3,000m3/h-30,0000m3/h, Coil type 4rows/6rows/8rows
It is a new published air handling unit that based on the horizontal air handling unit. Consists of mixing box, panel(medium/HEPA filter) and fan section. Electric heater and humidifier is an optional if needed.
Characteristics:
1.Casing. Polyurethane foam board with 25mm, 35mm and 50mm to choose.
2.Mixing box. For the return air and fresh air. The inlet position and dimension of the fresh and return air can be adjusted if needed. The ratio of the fresh and return air can be altered by the air intake damper.
3.Air damper. The best air conditioning design can be achieved with an optimum fresh/return air ratio. Electrical motor control is an optional.
4.Filter. Primary filter G4 is standard. Secondary filter-bag type and intermediate, high efficiency filter HEPA filter is an optional.
5.Other more optional function section. Spraying section, humidifier, silencer, electric air cleaner, heat recovery, ultraviolet sterilization section, photocatalyst section, trioxygen section and electric heater.
Composed Type Air Handling Unit,Composed Air Handling Unit Diagram,Air Handling Unit Working Principle,Types Of Air Handling Unit
Jinan Amrta Air Conditioning Co.,Ltd , https://www.waterchiller.pl