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Power MOSFET plays an important role in power electronic systems, the failure of which will lead to system losing functions. Thus the degradation failure process and mechanism of MOSFET attract wide attention of scholars. However current research works cannot solve the real time degradation monitoring problem of MOSFET. Normally, MOSFET should be removed from the system for testing or monitoring....
Vibration analysis is a highly responsive tool in the rotating machine industry, making it possible to highlight the symptoms of anomalies affecting this type of machine. This work proposes the use of these tools to develop a strategy for monitoring a gas turbine used in a natural gas transportation in Algeria, based on vibrations analysis and detection of an examined gas turbine, the proposed approach...
Key difference between high-power semiconductor and low-power semiconductor is self heating during operation. Self heating leads to extreme thermal change in semiconductor. Especially, regenerative energy applications tend to repeated intermittent operation. Thermal change leads to mechanical stress by CTE(Coefficient of Thermal Expansion) mismatch between substrate, bonding material(solder), bonding...
Failure prognostics can help improving the availability and reliability of industrial systems while reducing their maintenance cost. The main purpose of failure prognostics is the anticipation of the time of a failure by estimating the Remaining Useful Life (RUL). In this case, the fault is not undergone and the estimated RUL can be used to take appropriate decisions depending on the future exploitation...
The aim of the paper is to present a distributed supervisory architecture for the design and development of reconfigurable and integrated control systems in road vehicles. The performance specifications are guaranteed by the local controllers, while the coordination of these components is provided by the supervisor. Monitoring components provide the supervisor with information needed to make decisions...
Life prediction is one of the newly arisen key technology for promoting the reliability and quality of electronic products. But, the effect of the prevalent life prediction methods is not satisfactory; most of them are on the stage of theoretical research and lack of engineering practicability. In this paper, a methodology of life prediction based on accelerated degradation testing is introduced....
In this work a general concept for accelerated aging of linear analog circuit blocks is proposed. Due to the interaction of diverse aging mechanisms, circuit behavior in an arbitrary effect accelerated stress setup may show large deviation to the aging under nominal circuit conditions. The proposed analytical small signal analysis proves to be a fast and easy way to obtain the contributions of all...
This paper compares two condition-based maintenance policies based on control limit maintenance decision rule. Each considered maintenance policy is adapted to the information collected through on-line monitoring. The concerned system gradually deteriorates and undergoes a change which leads to a sudden increase of its deterioration rate in a life cycle. In this study, a mathematical model is developed...
Since the very beginning of the flash memory era, the market has been dominated by the floating gate technology. However, as floating gate flash continues along a very steep scaling path, more and more barriers start to appear, limiting further scaling possibilities of the technology. At the same time, other concepts are preparing to take over. This paper concentrates on the prospect of high-k materials...
Simple ring-oscillator circuit has been used to estimate the degradation in circuit performance due to negative bias temperature instability (NBTI) effect but it fails to isolate the degradation from the NBTI for PMOS and the positive bias temperature instability (PBTI) for NMOS in high-K dielectric/metal gate CMOS technology. In this paper, we propose new circuit structures which monitor the NBTI...
This paper presents a structural health monitoring system for monitoring, with reduced visual impact, one historical building structure. The system is based on fiber Bragg gratings and comprises 19 displacement sensors and 5 temperature sensors. All the sensors were custom made according to the monitoring points' characteristics. The results obtained over the first year of monitoring are presented...
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