Sensor Selection for PHM
Calce Team: Shunfeng Cheng, Hyunseok Oh, Myra Torres, Prof. Michael Pecht
Objectives: The objective of this project is to tell how to select an optimal sensor system for PHM application.
Introduction:
There are several available methods for PHM implementation in electronic products and systems, including the use of expended devices, such as “canary” and fuses that fail earlier than the host product to provide advance warning of failure; monitoring and reasoning of parameters that are precursors to impending failure, such as shifts in performance parameters; and modeling of stress and damage in products utilizing exposure conditions (e.g., usage, temperature, vibration, radiation) combined with physics-of-failure (PoF) models to compute accumulated damage and assess the remaining life. In all of these approaches, the monitoring of parameters or conditions is a fundamental step. These parameters or conditions may be generated through the whole product life cycle including manufacturing, shipment, storage, handling and operation. Conditions may include temperature, vibration, shock, pressure, acoustic levels, strain, stress, inert environments, humidity levels, contamination, usage frequency, usage severity, usage time, power, and heat dissipation. Sensor systems are integrated with the electronic product to be monitored in order to measure these conditions.
This project will investigate the current sensor systems for PHM, the emerging trends of the sensor systems, and discuss the considerations of the sensor selection to tell how to select an optimal sensor system for PHM application.