MFPT: The Applied Systems Health Management Conference 2011, Virginia Beach, Virginia, 10-12 May 2011

Prognostics of Polymer Positive Temperature Coefficient Resettable Fuses

Michael Pecht1 , Shunfeng Cheng1and Kwok Tom2
1CALCE, Center for Advanced Life Cycle Engineering, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20740, USA
2Army Research Laboratory 2800 Powder Mill Road, Adelphi, Maryland, 20783


As a circuit protection device, polymer positive temperature coefficient (PPTC) resettable fuses have been widely used in over-current or over-temperature circuit-protection designs in computers, automotive circuits, telecommunications equipment, and medical devices. Failure of a resettable fuse can cause abnormal operation of and damage to a circuit. Prognostics for a resettable fuse enables advance warning of the failure of the fuse and the prediction of its remaining useful life; therefore, the operator can take action to maintain or replace the component to reduce damage to the circuit. This paper uses the cross-validation equential probability ratio test (CV-SPRT) method to monitor the failure precursor parameters in situ, and uses an autoregressive integrated moving average (ARIMA) model to predict failure based on the precursors.

This article is available online here.

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