172 citations · 299 across the 24 of their papers we have counts for
8 papers · 1 filter
React to Surprises: Stable-by-Design Neural Feedback Control and the Youla-REN
Nicholas H. Barbara, Ruigang Wang, Alexandre Megretski +1
We study parameterizations of stabilizing nonlinear policies for learning-based control. We propose a structure based on a nonlinear version of the Youla-Kucera parameterization co…
Mathematical certification of motion planning on uncertain terrain with limited perception: a case study
Nikolaos Skouloudis, Alexandre Megretski
We design a controller for an agent whose mission is to reach a stationary target while avoiding a family of obstacles which are not known a-priori. The agent moves in the two dime…
Inverse Stability Problem and Applications to Renewables Integration
Thanh Long Vu, Hung Dinh Nguyen, Alexandre Megretski +2
In modern power systems, the operating point, at which the demand and supply are balanced, may take different values due to changes in loads and renewable generation levels. Unders…
Convex Parameterizations and Fidelity Bounds for Nonlinear Identification and Reduced-Order Modelling
Mark M. Tobenkin, Ian R. Manchester, Alexandre Megretski
Model instability and poor prediction of long-term behavior are common problems when modeling dynamical systems using nonlinear "black-box" techniques. Direct optimization of the l…
Baseband Equivalent Models and Digital Predistortion for Mitigating Dynamic Continuous-Time Perturbations in Phase-Amplitude Modulation-Demodulation Schemes (Expanded version)
Omer Tanovic, Alexandre Megretski, Yan Li +2
We consider baseband equivalent representation of transmission circuits, in the form of a nonlinear dynamical system in discrete time (DT) defined by a series interconn…
Discrete-Time Models Resulting From Dynamic Continuous-Time Perturbations In Phase-Amplitude Modulation-Demodulation Schemes
Omer Tanovic, Alexandre Megretski, Yan Li +2
We consider discrete-time (DT) systems S in which a DT input is first tranformed to a continuous-time (CT) format by phase-amplitude modulation, then modified by a non-linear CT dy…