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1、A Web-based automotive refrigeration troubleshooting system applyingknowledge engineering approach应用知识工程方法的基于网络的自动冷却故障解除系统Janus S. Liang *Department of Vehicle Engineering, Yung-Ta Institute of Technology and Commerce, 316, Chunshan Road, Linlo, Ping Tung, 909, Taiwan台湾 909 屏东县，Linlo。中山路，316,Yung-Ta
2、 科技与商贸学院，车辆工程系A R T I C L E I N F O文章信息Article history:文章经历Received 20 September 20082008.9.20 号收到Received in revised form 20 May 20092009.5.20 收到修改版Accepted 5 July 200920097.5.采纳Available online 30 July 20092009.7.30 文章在网上发布Keywords:关键词Knowledge-based troubleshooting system 基于知识的故障排除系统Automotive re
3、frigeration system 自动冷却系统Virtual reality 虚拟现实A B S T R A C T摘要This study describes the generation of Web-based troubleshooting system for automotive refrigeration system using knowledge engineering approach over the Internet. The relevant technologies used in the system are discussed in detail. The
4、aim of the proposed knowledge-based troubleshooting system (KBTS)is to integrate the troubleshooting process of automotive refrigeration system into a single architecture for retrieving knowledge and experience of technicians in automobile repairing field. The application ofKBTS guides the novice or
5、 learner through different stages of the troubleshooting process enabling the creation of problem-solving list, its contents include the selection of hand tools and instrument, decision of detecting methods, procedure of disassembling/reassembling component, adjusting, and so on.Through the use of w
6、eb and knowledge approach, the troubleshooting knowledge of automobile refrigeration system can be effectively incorporated into the procedure generation framework and a Web-based troubleshooting procedure generation system can also be implemented. 2009 Elsevier B.V. All rights reserved本研究描述了用因特网上的知
7、识工程方法来生成基于网络的自动冷却系统的故障排除系统。此研究详细讨论了系统中使用的相关技术。提出基于知识的故障排除系统(KBTS)的目的是为了把自动冷却系统的故障排除过程整合到一个单一的结构中以便于检索汽车维修技术员的知识和经验。应用基于知识的故障排除系统(KBTS) 来指导新手或初学者学习不同的故障排除阶段，这样可以产生一个问题解决清单。它的内容包括选择手动工具和仪器，决定查找方法，拆卸、重装零件的过程，调整，等等。通过使用网络和知识方法，自动冷却系统的故障排除知识能有效整合到程序生成框架中，基于网络的故障排除程序的生成系统也能得以实现 2009 Elsevier B.V. All 1. I
8、ntroduction1.引言Air conditioning has become standard equipment on most vehicles, enhancing traveling comfort and safety. Modern systems feature integrated cooling, heating, demisting and defrosting, air filtering, and humidity control. There are a wide range of factors that affect the global warming
9、contribution of a car,many of which result from how the car is used in practice. The current design of air-conditioning systems require a nonflammable,low toxicity refrigerant like HFC-134a for passenger cars, trucks, trains, and buses. State of the art system design has resulted in improved efficie
10、ncy, reduced refrigerant charge and minimum refrigerant leakage, dramatically improving the environmental performance of mobile air-conditioning. Besides,for comfort some fresh and cool air must pass through the passenger compartment of the vehicle in the torrid summer.Hence, it is important to keep
11、 the refrigeration system in a goodcondition在大多数车辆上，空调已成为标配设备，它使坐车变的更舒服和安全。现代系统功能整合了冷却，加热，去雾和除霜，空气过滤，湿度控制。有许多因素影响全球变暖，汽车的责任的很大一部分来自于在实际中使用汽车的方式。目前，对于设计客运汽车，卡车，客运火车和巴士的空调系统，需要非易燃烧性的，低毒性的制冷剂像 HFC-134a。系统设计的技术水平的提高使得效率得到改善，减少了制冷剂的用量和使制冷剂的泄露降到了最低水平，极大地提高了汽车空调系统的环保性能。另外，在炎热的夏天，为了舒适，必须让新鲜的冷空气通过乘客室。保持冷却系统的
12、稳定状态是很重要的。To stay competitive in todays global economy an automotive repair company (or shop) must build on its intellectual capital and create time to innovate and assess more advanced, complex types of tools to eliminate uncertainty and repetition from the troubleshooting process. In other fields,
13、 there are new ways to harness the advantages of new technologies and communications tools such as Internet, knowledge-based engineering (KBE) system,etc. becoming an essential part of strategy for improving effectiveness 13.为了保持在全球经济中的竞争力，一个汽车维修公司（店）必须建立人力资本并为创新与获得更多先进的，复杂的各类工具来把不确定性和重复从故障排除过程中消除掉创
14、造机会。在其它领域，有新的方法来利用新技术和通信工具，例如：因特网，基于知识的工程系统等的优势，它们变成了改善效率的方法的必不可少的部分。Web-based technology can, through its open architecture,uniform information model, object-oriented structure, distributed cooperation, eliminate the time and space restriction of engineering design, manufacture and information serv
15、ice as well as realizethe knowledge share to a maximum extent 48. Meanwhile, KBEis an engineering method that represents a merging of object oriented programming, artificial intelligence techniques andcomputer aided technologies, giving benefit to customized or variant automation solutions. The ulti
16、mate goal of the KBE system should be to capture the best practices and engineering expertise into a corporate knowledge based (as shown in Fig. 1).基于网络的技术能够通过它的开放结构，统一的信息模型，面向对象的结构，分布式合作来消除工程设计，制造和信息服务的时间和和空间限制，也能最大限度地实现知识共享48.。同时，KBE 代表的是一种面向对象编程，人工智能技术和计算机辅助技术的整合，有利于定制的或可变的自动化解决方案。KBE 系统的最终目标应该是把最好的做法和工程专业知识放进公司的知识库中（如图 1 所示）There have been many development methodologies suggested for the KBS domain. The methodologies have been aimed at assisting the developers to define
