Search Results for author: Bardh Hoxha

Found 10 papers, 2 papers with code

Scaling Learning based Policy Optimization for Temporal Tasks via Dropout

no code implementations23 Mar 2024 Navid Hashemi, Bardh Hoxha, Danil Prokhorov, Georgios Fainekos, Jyotirmoy Deshmukh

We show how this learning problem is similar to training recurrent neural networks (RNNs), where the number of recurrent units is proportional to the temporal horizon of the agent's task objectives.

Robust Conformal Prediction for STL Runtime Verification under Distribution Shift

1 code implementation16 Nov 2023 Yiqi Zhao, Bardh Hoxha, Georgios Fainekos, Jyotirmoy V. Deshmukh, Lars Lindemann

To address these challenges, we assume to know an upper bound on the statistical distance (in terms of an f-divergence) between the distributions at deployment and design time, and we utilize techniques based on robust conformal prediction.

Conformal Prediction Trajectory Prediction

Safety Under Uncertainty: Tight Bounds with Risk-Aware Control Barrier Functions

no code implementations3 Apr 2023 Mitchell Black, Georgios Fainekos, Bardh Hoxha, Danil Prokhorov, Dimitra Panagou

We propose a novel class of risk-aware control barrier functions (RA-CBFs) for the control of stochastic safety-critical systems.

A Neurosymbolic Approach to the Verification of Temporal Logic Properties of Learning enabled Control Systems

no code implementations7 Mar 2023 Navid Hashemi, Bardh Hoxha, Tomoya Yamaguchi, Danil Prokhorov, Geogios Fainekos, Jyotirmoy Deshmukh

In this paper, we present a model for the verification of Neural Network (NN) controllers for general STL specifications using a custom neural architecture where we map an STL formula into a feed-forward neural network with ReLU activation.

Risk-Awareness in Learning Neural Controllers for Temporal Logic Objectives

no code implementations14 Oct 2022 Navid Hashemi, Xin Qin, Jyotirmoy V. Deshmukh, Georgios Fainekos, Bardh Hoxha, Danil Prokhorov, Tomoya Yamaguchi

In this paper, we consider the problem of synthesizing a controller in the presence of uncertainty such that the resulting closed-loop system satisfies certain hard constraints while optimizing certain (soft) performance objectives.

Risk-Bounded Control with Kalman Filtering and Stochastic Barrier Functions

no code implementations30 Dec 2021 Shakiba Yaghoubi, Georgios Fainekos, Tomoya Yamaguchi, Danil Prokhorov, Bardh Hoxha

Our goal is to design controllers that bound the probability of a system failure in finite-time to a given desired value.

Neural Network Repair with Reachability Analysis

no code implementations9 Aug 2021 Xiaodong Yang, Tom Yamaguchi, Hoang-Dung Tran, Bardh Hoxha, Taylor T Johnson, Danil Prokhorov

Formally verifying the safety and robustness of well-trained DNNs and learning-enabled systems under attacks, model uncertainties, and sensing errors is essential for safe autonomy.

Collision Avoidance

Reachability Analysis of Convolutional Neural Networks

no code implementations22 Jun 2021 Xiaodong Yang, Tomoya Yamaguchi, Hoang-Dung Tran, Bardh Hoxha, Taylor T Johnson, Danil Prokhorov

Besides the computation of reachable sets, our approach is also capable of backtracking to the input domain given an output reachable set.

Search-based Test-Case Generation by Monitoring Responsibility Safety Rules

no code implementations25 Apr 2020 Mohammad Hekmatnejad, Bardh Hoxha, Georgios Fainekos

The safety of Automated Vehicles (AV) as Cyber-Physical Systems (CPS) depends on the safety of their consisting modules (software and hardware) and their rigorous integration.

Decision Making

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