Dr. Ed Habtour,
US Army Research Laboratory, Vehicle Technology Directorate
Exploiting Nonlinear Dynamic Parameters to Outsmart Fatigue in Rotorcrafts
Thursday, March 31, 2016, 1:30pm | Room 3-333
Military rotorcrafts are highly nonlinear systems that operate in complex environments. The common methods for evaluating the health of these systems are based on simplified fatigue tests and linear models. Consequently, engineers compensate by including safety and correction factors, which lead to a "safety multiplicative effect". These compromises come with penalties, such as increases in the vehicle's size, and weight. As a result, the US Army Research Laboratory (ARL) has developed a holistic approach to improve the sustainment of rotorcrafts through detecting precursors to fatigue damage using the aircraft global response. Analytical and experimental techniques are under development at ARL to understand the interplays between the components nonlinear dynamic parameters and the microstructural evolution to track the aging process prior to crack initiation. The presentation provides an overview of damage precursor research efforts at ARL, and an approach to quantify the interplays between the nonlinear macro- and micro-parameters. Our method exploit the nonlinear parameters sensitivities to precursors to track the structural health. ARL approach is a paradigm shift from costly manual maintenance to preemptively reporting precursors to damage. We believe including precursors' detection in the aircraft health monitoring systems is profoundly a new innovation in achieving bio-inspired health awareness that needs significant development.
Ed Habtour leads the Prognostics and Diagnostics Team in the Vehicle Technology Directorate at ARL. He focuses on developing mathematical and experimental techniques to predict the dynamical response of aging mechanical systems with emphasis on extending their life. Prior to joining ARL, Ed has held technical positions at the Space Dynamics Laboratory, ATK (formally Swales Aerospace), Northrop Grumman, and Army Materiel System Activity Analysis. He earned his bachelor's degree in Mechanical Engineering at Utah State University. He earned three masters in engineering from Johns Hopkins University, Purdue University, and University of Maryland. He completed his doctorate in Mechanical Engineering at the University of Maryland. Ed has served in technical committees and review panels. He published several technical papers and received several awards.