Search Results for author: Jason J. Choi

Found 7 papers, 1 papers with code

Safety Filters for Black-Box Dynamical Systems by Learning Discriminating Hyperplanes

1 code implementation7 Feb 2024 Will Lavanakul, Jason J. Choi, Koushil Sreenath, Claire J. Tomlin

As such, we believe that the new notion of the discriminating hyperplane offers a more generalizable direction towards designing safety filters, encompassing and extending existing certificate-function-based or safe RL methodologies.

Reinforcement Learning (RL)

A Forward Reachability Perspective on Robust Control Invariance and Discount Factors in Reachability Analysis

no code implementations26 Oct 2023 Jason J. Choi, Donggun Lee, Boyang Li, Jonathan P. How, Koushil Sreenath, Sylvia L. Herbert, Claire J. Tomlin

We also formulate a zero-sum differential game between the control and disturbance, where the inevitable FRT is characterized by the zero-superlevel set of the value function.

Recursively Feasible Probabilistic Safe Online Learning with Control Barrier Functions

no code implementations23 Aug 2022 Fernando Castañeda, Jason J. Choi, Wonsuhk Jung, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

This feasibility analysis results in a set of richness conditions that the available information about the system should satisfy to guarantee that a safe control action can be found at all times.

Out-of-Distribution Detection

Pointwise Feasibility of Gaussian Process-based Safety-Critical Control under Model Uncertainty

no code implementations13 Jun 2021 Fernando Castañeda, Jason J. Choi, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

However, since these constraints rely on a model of the system, when this model is inaccurate the guarantees of safety and stability can be easily lost.

Robust Control Barrier-Value Functions for Safety-Critical Control

no code implementations6 Apr 2021 Jason J. Choi, Donggun Lee, Koushil Sreenath, Claire J. Tomlin, Sylvia L. Herbert

This paper works towards unifying two popular approaches in the safety control community: Hamilton-Jacobi (HJ) reachability and Control Barrier Functions (CBFs).

valid

Scalable Learning of Safety Guarantees for Autonomous Systems using Hamilton-Jacobi Reachability

no code implementations15 Jan 2021 Sylvia Herbert, Jason J. Choi, Suvansh Sanjeev, Marsalis Gibson, Koushil Sreenath, Claire J. Tomlin

However, work to learn and update safety analysis is limited to small systems of about two dimensions due to the computational complexity of the analysis.

Gaussian Process-based Min-norm Stabilizing Controller for Control-Affine Systems with Uncertain Input Effects and Dynamics

no code implementations14 Nov 2020 Fernando Castañeda, Jason J. Choi, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

This paper presents a method to design a min-norm Control Lyapunov Function (CLF)-based stabilizing controller for a control-affine system with uncertain dynamics using Gaussian Process (GP) regression.

regression

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