Shunfeng Cheng

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This paper investigates the use of Multivariate State Estimation Techniques as input in predicting the remaining useful life prediction of electronic products. A prognostics approach combining the Multivariate State Estimation Technique with life cycle damage prediction is then presented, along with a case study. The challenges of the approach are also(More)
Prognostics and health management (PHM) is an enabling discipline consisting of technologies and methods to assess the reliability of a product in its actual life cycle conditions to determine the advent of failure and mitigate system risk. Sensor systems are needed for PHM to monitor environmental, operational, and performance-related characteristics. The(More)
Lymphocystis disease virus (LCDV) can infect, both naturally and experimentally, about 100 different teleost fish species. In this study, LCDV was purified using differential and gradient centrifugation from skin tumours of Japanese flounder Paralichthys olivaceus. A panel of five monoclonal antibodies (Mabs) against LCDV were produced by immunization of(More)
Oxidative stress (OS), as a signal of aberrant intracellular mechanisms, plays key roles in maintaining homeostasis for organisms. The occurrence of OS due to the disorder of normal cellular redox balance indicates the overproduction of reactive oxygen species (ROS) and/or deficiency of antioxidants. Once the balance is broken down, repression of oxidative(More)
Prognostics and health management methods can provide advance warning of failure; reduce the life cycle cost of a product by decreasing inspection costs, downtime, and inventory; and assist in the design and logistical support of fielded and future electronic products. Traditional prognostic methods, such as data-driven methods and physics of failure(More)
Resettable fuses have been widely used in overcurrent or overtemperature circuit protection designs in computers, automotive circuits, telecommunications equipment, and medical devices. Abnormal behavior of a resettable fuse can damage a circuit. This paper identifies and experimentally assesses the failure precursor parameters of a polymer positive(More)
∗ Author of correspondence, Phone: (301) 405-5278, Email:pecht@calce.umd.edu ABSTRACT Data collection is an essential part of prognostics and health monitoring, and often requires the use of sensor systems to measure environmental and operational parameters. In this paper, the considerations for sensor system selection for prognostics and health monitoring(More)
Data collection is an essential part of a prognostics and health monitoring approach and often requires the use of sensor systems to measure the environmental and operational parameters of a product or system. A survey is presented on the commercial availability of sensor systems that can be used for monitoring electronic products and systems. From the(More)