Search Results for author: Samuel Pfrommer

Found 8 papers, 2 papers with code

Tight Certified Robustness via Min-Max Representations of ReLU Neural Networks

no code implementations7 Oct 2023 Brendon G. Anderson, Samuel Pfrommer, Somayeh Sojoudi

The reliable deployment of neural networks in control systems requires rigorous robustness guarantees.

Image Classification

Projected Randomized Smoothing for Certified Adversarial Robustness

1 code implementation25 Sep 2023 Samuel Pfrommer, Brendon G. Anderson, Somayeh Sojoudi

Randomized smoothing is the current state-of-the-art method for producing provably robust classifiers.

Adversarial Robustness

Meta-Learning Parameterized First-Order Optimizers using Differentiable Convex Optimization

no code implementations29 Mar 2023 Tanmay Gautam, Samuel Pfrommer, Somayeh Sojoudi

Conventional optimization methods in machine learning and controls rely heavily on first-order update rules.

Meta-Learning

LQR Control with Sparse Adversarial Disturbances

no code implementations21 Sep 2022 Samuel Pfrommer, Somayeh Sojoudi

Under mild conditions, we show that the disturbance-aware policy converges to the blind online policy if the number of disturbances grows sublinearly in the time horizon.

Safe Reinforcement Learning with Chance-constrained Model Predictive Control

no code implementations27 Dec 2021 Samuel Pfrommer, Tanmay Gautam, Alec Zhou, Somayeh Sojoudi

Real-world reinforcement learning (RL) problems often demand that agents behave safely by obeying a set of designed constraints.

Model Predictive Control reinforcement-learning +2

Discriminability of Single-Layer Graph Neural Networks

no code implementations17 Oct 2020 Samuel Pfrommer, Fernando Gama, Alejandro Ribeiro

We define a notion of discriminability tied to the stability of the architecture, show that GNNs are at least as discriminative as linear graph filter banks, and characterize the signals that cannot be discriminated by either.

ContactNets: Learning Discontinuous Contact Dynamics with Smooth, Implicit Representations

1 code implementation23 Sep 2020 Samuel Pfrommer, Mathew Halm, Michael Posa

Common methods for learning robot dynamics assume motion is continuous, causing unrealistic model predictions for systems undergoing discontinuous impact and stiction behavior.

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