Distributed Intelligent Interface for Life Cycle Integrity Monitoring

目前的研究项目于1997年启动，旨在提高大型人工制品的可靠性和安全性，如核电站、航天飞机、飞机等。项目背后的主要思想是相信预防性维护的改进，特别是基于整个工厂生命周期的广泛视角的状态维护，是满足需求的核心问题。此外，基于对基于状态的决策所需的数据库技术的本质是智能接口的基本认识，努力集中在以下三个关键技术的开发上：(a)具有基于状态的维护支持的进化适应性的生命周期数据库，(b)监测和诊断工具的移动代理实现，(c)面向目标的智能信息获取传感。在子项目-(a)中，引入了一种高效的数据搜索方案，并具体引入了部分和层次定义的相似度索引。该搜索方案可作为维修问题解决决策支持系统的技术基础。数据库的高可修改性也被证实对数据库的进化开发有用。在子项目-(b)中，监测和诊断工具由移动代理技术开发和实施，该技术允许动态任务分配和进化，以适应计算负载聚焦和技术创新。子项目(c)中技术发展的实质是面向目标的传感，这意味着传统传感系统和移动传感系统的合作使用。移动传感器的位置是在传统传感系统测量和基于贝叶斯网络模型的因果推理的基础上确定的。该研究清楚地证明了所提出的技术作为基于状态的维护支持系统的重要组成部分的高潜力，以确保生命周期的完整性。少

The present research project was launched in 1997 aiming at improving the reliability and safety of large-scale artifacts such as a nuclear power plant, space shuttle, aircraft, etc. The main idea behind the project is the belief that the improvement of preventive maintenance, with particular emphasis on the condition-based maintenance with a broad perspective covering the whole plant lifetime, is the central issue to meet the need.Furthermore, base on the fundamental recognition that the essential nature of the required database technique for condition-based decision-making is the intelligent interface, efforts were centered in development of the three key-techniques described below :(a) Lifecycle database with evolutionary adaptability for condition-based maintenance support,(b) Mobile-agent implementation of monitoring and diagnosis tools,(c) Goal-oriented sensing for intelligent information acquisition.In the subproject-(a), an efficient data search scheme was introduced by utilizi … More ng a specifically introduced similarity indices called partial and heirarchically-defined similarity index. The search scheme was found to be used as a technical basis decision-support system for maintenance problem solving. The high modifiability of the database was also confirmed to be useful for evolutionary development of the database. In the subproject-(b), the monitoring and diagnosis tools were developed and implemented by the mobile-agent technique, which allowed dynamic task allocation and evolution to accommodate computational load focusing and technology innovation.The essence of technical development in the subproject-(c) is the goal-oriented sensing, which implied cooperative use of conventional and mobile sensing systems. The locations of the mobile sensor were determined based of the measurement by the conventional sensing system and the causal reasoning based on the model called Bayesian net. The high potentiality of the proposed techniques as essential constituents of the condition-based maintenance support system for ensuring life cycle integrity was clearly demonstrated through the study. Less