Tooth root crack is a common fault in the gear system, it’s of significance to detect the crack fault during the operation process of the gearbox. However, the gearbox usually working in a non-stationary condition, namely speed or load are time-varying, which...
Currently available condition monitoring systems (CMS) offer many types of tools, including stationary systems, portable on-site instrumentation and finally wireless, autonomous systems. However, for a particular group of modern machine tools with limited access, like...
The European Union’s Restriction on Hazardous Substances (RoHS) Directive, imposed on electronics manufacturers in 2006, banned the use of certain toxic substances such as lead and cadmium in components and assemblies. Removal of lead which was used in solder, die...
Machine learning and statistical algorithms are receiving considerable attention during the past decade in prognostics and health management (PHM). However, there is a lack of consensus and methodology on algorithm selection in different scenarios, which renders the...
Condition-based maintenance of machinery is being much talked about in the engineering sector of defense and commercial industry. A lot of expenditure is generally incurred on condition monitoring of machinery to avoid unexpected downtimes and failures vis-à-vis...
Shelf lives are not well understood in the electronics industry. Despite the existence of the recommended shelf lives for some units from standards or manufacturers’ documents, many electronic parts are stored well beyond their recommended shelf lives for different...
Due to the fact that the combustion system, the core component of gas turbines, works in the highly adverse environmental conditions of high temperature and high pressure, it frequently faces malfunctions, causing catastrophic accidents. Hence, anomaly detection plays...
Hardly a day goes by anymore without hearing about a cybersecurity event in the news. In this paper/session, we will analyze the risk associated with smart devices, calibration, and maintenance that could compromise the cybersecurity status of operations and possibly...
The purpose of this research paper is to technically and philosophically analyze the behaviors of the current intelligent machines and try to think about an eventual artificial evolution. Will Artificial Intelligence (AI) bring us more advantages or more...
Following a brief overview of the history of the development of key aspects of rotor dynamic technology, this paper describes ways to estimate critical speeds, and cipher them from resonances and other vibration phenomena. The influence of various bearing types on a...
Two 75 HP pumps redundantly supply cooling water to the reactor pool of the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). Due to a recent history of premature bearing failures, one of these pumps has undergone maintenance to deal with...
In order to improve the energy efficiency and compact structure, the dual-rotor structure including the low- pressure rotor and high-pressure rotor has been widely used in aero-engine. Misalignment is one of the most common faults in the dual-rotor system, which will...
The health of rolling bearing plays an important part in the operation of rotating machinery like a gas turbine engine. Health monitoring and fault diagnosis of rolling bearings based on vibration signals have been through great development these years. But when...
A sensor with integrated mechanical transducing and temperature monitoring capability is described. The sensor includes housing containing a transducer, a temperature sensor with associated bias, a summing circuit, and a two-wire cable connector. The transducer is...
Turbomachinery condition monitoring and fault detection in the Malaysian oil and gas industry is currently done by monitoring the parameters of the equipment, such as a gas turbine, based on limits provided by the original equipment manufacturer. This is performed in...
This paper compares several methods of connecting fiberglass-reinforced pultruded plastic (FRP) structural members to tubular sections using bolted designs that are commonly used in the cooling tower industry. The study compares theoretically predicted values with...
The present paper describes universal vibration sensor mount devices for attaching sensors to the machinery. Some types of machinery vibration sensors need to be mounted in a particular orientation relative to the machine being monitored. One example is the two-axis...
Vibration detection can be performed by a meter or a single channel spectrum analyzer. The former has quantified vibration amplitude levels since the 1950s, while the latter was able to implement the Fast Fourier Transform (FFT) since the 1960s to break vibration down...
Planet bearing fault identification is an attractive but challenging task in numerous engineering applications, such as wind turbine and helicopter transmission systems. However, traditional fault characteristic frequency identification and impulsive feature...
This paper describes how to evaluate the accuracy of prognostic estimates for remaining-useful life (RUL), state of health (SoH), and prognostic horizon (PH). The primary goal of prognostics is to accurately predict future failure in systems. Condition-based...
This paper describes a multiple-variable analysis (MVA) methodology to detect and diagnose three types of faults associated with an electromechanical actuator (EMA): (1) loading faults, such as friction, on the shaft of an EMA motor, (2) shorting faults in the stator...
This paper describes work related to improving the electrical performance of an accelerometer-based sensor, RotoSense™, used for monitoring rolling stock: the locomotives and cars used in trains. At the 2018 MFPT conference, a paper, “Improved RotoSense™ for Rolling...
Vibration detection can be performed by a meter or a single channel spectrum analyzer. The former has quantified vibration amplitude levels since the 1950s, while the latter was able to implement the Fast Fourier Transform (FFT) since the 1960s to break vibration down...
Bearing faults in machinery are among the most critical faults that require attention by maintenance personnel at the early stages of fault initiation. In many cases, it is difficult to directly and accurately identify the fault type and its extent under varying...
One of the limitations of conventional modal testing using a roving impact hammer is that the reference sensor (usually an accelerometer) must remain fixed throughout the test. Since the accelerometer must typically be connected by a wire to the data acquisition...
