Creation of LIVE Digital Twin for Prognostics and Predictive Maintenance of Rotating Machineries (LIVE for 2PM)

受新冠肺炎疫情影响，对水电、风能、交通运输等领域的关键旋转机械（RM）的定期现场检查中断。不幸的是，由于磨损、热弯曲、污垢收集、绝缘失效、局部放电、故障电流、过载引起的热应力等原因，RM通常会动态地恶化其平衡状态，并逐渐发展为影响RM性能和寿命的振动不平衡响应。在涡轮机、电动机、发电机、泵、喷气风扇等应用中，RM的故障产生了巨大的计划外维修成本，更重要的是可能危及人类生命。该项目旨在开发用于RM高度关键资产的预测和预测性维护（LIVE for 2PM）的实时数字孪生概念所需的方法。术语“LIVE”指的是方法论中四个阶段的第一个字母，即学习、识别、验证和扩展。LIVE digital Twins的主要特点是在可选的级别和模式下开发多物理场仿真解决方案，这些解决方案由人工神经网络和深度学习工具支持。LIVE Digital Twin允许学习单个RM的行为模式，考虑到他们的规格，环境和定制因素。它确定传感器的位置和类型以及检测程序，以验证逐渐增加的缺陷的可能性。它通过建议预测性维护来延长RM的使用寿命，避免其故障。LIVE Digital Twin的实施不仅减少了疫情期间现场检查的需求，还可以显著改善加拿大能源和交通部门关键基础设施的资产管理，实现预测性维护，降低维修成本，减少更换零件的频率，缩短相应高度关键基础设施的停机时间，减少浪费，并延长关键机器的寿命。所有这些都为一系列产业带来了显著的经济增长，也为社会带来了显著的福利。

Due to the pandemic, the regular in-person inspection of the critical Rotating Machineries (RM) in hydropower, wind energy, and transportation were interrupted. Unfortunately, RM typically deteriorate their balance condition dynamically, due to wear, thermal bending, dirt collection, insulation failure, partial discharge, fault currents, thermal stress due to overloading, etc., and gradually develop concerning vibratory unbalance responses affecting RM performance and lifespan. Failure of RM in applications such as turbomachines, electromotors, generators, pumps, jet fans, etc. creates enormous unscheduled repair costs and more importantly may put human life in danger. This project aims to develop methodologies required to employ the concept of LIVE Digital Twin for Prognostics and Predictive Maintenance (LIVE for 2PM) of RM highly critical assets. The term "LIVE" refers to the first letters of the four phases in the methodology, i.e. Learn, Identify, Verify, and Extend. The key feature in LIVE digital Twins is multi-physics simulation solutions developed in alternative levels and modes, which are supported by artificial neural network and deep learning tools. LIVE Digital Twin allows Learning the behavioral patterns of individual RM considering their specifications, environment and customized factors. It Identifies the locations and types of sensors and the sensing procedures to Verify the possibilities for progressively increasing defects. It Extends the life of RM by advising predictive maintenance avoiding its failure. Implementation of LIVE Digital Twin not only reduces the needs for in-person inspection during the pandemic, but also can result in significant improvement in asset management of the critical Canadian infrastructures for energy and transportation sectors with predictive maintenance, reduced cost of repair, reduced frequency in replacing parts, shorter down-time of the corresponding highly critical infrastructures, reduced waste, and increased life-span of critical machines. All of these result in significant economic growth for a chain of industries and also a noticeable welfare of the society.