Justin Lidard
PhD Student, Princeton University
jlidard [at] princeton [dot] edu
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I am a PhD student in Mechanical and Aerospace Engineering at Princeton, advised by Professor Naomi Leonard, where I will study multi-agent control theory, dynamical systems, machine learning, and their applications to robotics. I am fortunate to be supported by the Francis Robbins Upton Fellowship and the National Defense Science and Engineering Graduate (NDSEG) Fellowship. I have also recieved the NASA Space Technology Graduate Research Opportunities (NSTGRO; previously NSTRF) Fellowship.
In summer 2020, I did a research internship at Aurora Flight Sciences Cambridge. At Aurora, I worked on Gamebreaker, a DARPA project investigating quantitative modeling of balance in reinforcement learning games. Previously, I interned at the Johns Hopkins University Applied Physics Lab, where I worked on Tripwire, a system for undersea tracking and collision avoidance, and Stiletto, a low-cost prototype interceptor for hypersonic threats.
I did my undergrad at the University of Maryland, where I completed thesis research advised by Professor Derek Paley and funded by the ASPIRE Research Program for Undergraduates.
CV  / 
Bio
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Research
I'm interested in dynamical systems, control theory, optimization, perception, and machine learning.
Much of my research is about modeling and interpreting the motion and stability of complex systems.
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Feedback Control and Parameter Estimation for Lift Maximization of a Pitching Airfoil
Justin Lidard,
Debdipta Goswami,
David Snyder,
Girguis Sedky,
Anya Jones,
Derek Paley
Submitted to AIAA JGCD, 2020
Lab website
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Data-driven method for augementing the lift of a rapidly pitching airfoil using a nonlinear control law and bifurcation theory. An extended Kalman filter is used to estimate the aerodyamic flow conditions and to predict the augmented lift output.
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Output Feedback Control for Lift Maximization of a Pitching Airfoil
Justin Lidard,
Debdipta Goswami,
David Snyder,
Girguis Sedky,
Anya Jones,
Derek Paley
AIAA SciTech, 2020
Lab website
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See on AIAA
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Download citation
Data-driven method for augementing the lift of a rapidly pitching airfoil using a nonlinear control law and bifurcation theory. An recursive Bayesian filter is implemented using an approximation of the Perron-Frobenius (PF) operator to summarize the nonlinear dynamics over a finite time horizon and estimate the flow state from lift measurements.
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