|
2:00 p.m.
Virtual & William L. Fourney Aerospace Engineering Conference Room 3164 Glenn L. Martin Hall
For More Information:
Renee Hance
srhance@umd.edu
Special Aerospace Seminar
Stability, Control, and Extended Reality Simulation of Time-Periodic Aerospace Systems
When: Thursday, March 10, 2022 at 2 PM
Where: William L. Fourney Aerospace Engineering Conference Room 3164 Glenn L. Martin Hall
Zoom: https://umd.zoom.us/j/7153453919
Speaker: Umberto Saetti
Assistant Professor, Department of Aerospace Engineering, Auburn University
ABSTRACT:
Aerospace engineering teems with periodically forced systems, with illustrious vertical lift examples including rotary-wing vehicles (e.g., helicopters) and flapping-wing flyers (e.g., insects, bio-inspired robots). The dynamics of these systems are generally represented by nonlinear time-periodic (NLTP) systems. Compared to nonlinear time-invariant (NLTI) systems, the stability analysis and control of NLTP systems is typically a more challenging task. This is because when the forcing amplitude is sufficiently high, the higher harmonics of the system’s dynamics can heavily affect the stability properties. As an example, the relative importance of the time- periodic dynamics on the overall dynamics of the system is approximately 7% for helicopters and up to 50% for hovering insects. Moreover, these higher harmonics should be accounted for in control system design to guarantee desired stability and response characteristics.
This talk discusses the development of a novel approach to the stability analysis and control of NLTP systems. Examples are provided for three different aerospace vehicles with NLTP dynamics: a helicopter, a flapping- wing micro-aerial-vehicle (FWMAV), and a flapping-tail airplane. Broader implications and future applications of the methodology are presented in the context of rotorcraft vibrations, aeroacoustics, and interactional aerodynamics in shipboard operations, as well as for flapping-wing flight stability and control.
BIOGRAPHY:
Dr. Umberto Saetti is an Assistant Professor in the Department of Aerospace Engineering at Auburn University. His research focuses on modeling, simulation, order reduction, and control of high-order models of the coupled flight dynamics, aerodynamics, and aeroacoustics of rotary- and flapping-wing vehicles. These models are used for studies involving immersive simulations that make use of Extended Reality (XR), human-machine interaction, synthesis of advanced flight control laws, development of innovative pilot cueing methods, and fundamental understanding of the stability of flapping-wing flight.
Dr. Saetti held appointments as Postdoctoral Fellow in the Daniel Guggenheim School of Aerospace Engineering at Georgia Tech and as Visiting Scholar at the U.S. Army Aviation Development Directorate at NASA Ames. He holds a Ph.D. in Aerospace Engineering (with a minor in Computational Science), an M.Sc. in Aerospace Engineering, and an M.Sc. in Electrical Engineering from The Pennsylvania State University. He received his B.Sc. in Aerospace Engineering from Politecnico di Milano, Italy. Saetti is an awardee of the 2022 Office of Naval Research Young Investigator Program (ONR YIP) and a recipient of the 2019 Vertical Flight Foundation (VFF) Barnes McCormick Memorial Scholarship.
This Event is For: Graduate • Undergraduate • Faculty • Staff
|
Event Information
