Search Results for author: Gabor Karsai

Found 8 papers, 4 papers with code

Dynamic Simplex: Balancing Safety and Performance in Autonomous Cyber Physical Systems

no code implementations20 Feb 2023 Baiting Luo, Shreyas Ramakrishna, Ava Pettet, Christopher Kuhn, Gabor Karsai, Ayan Mukhopadhyay

To address these limitations, we propose a dynamic simplex strategy with an online controller switching logic that allows two-way switching.

Decision Making

ANTI-CARLA: An Adversarial Testing Framework for Autonomous Vehicles in CARLA

1 code implementation19 Jul 2022 Shreyas Ramakrishna, Baiting Luo, Christopher Kuhn, Gabor Karsai, Abhishek Dubey

A key part of such tests is adversarial testing, in which the goal is to find scenarios that lead to failures of the given system.

Autonomous Driving

Risk-Aware Scene Sampling for Dynamic Assurance of Autonomous Systems

1 code implementation28 Feb 2022 Shreyas Ramakrishna, Baiting Luo, Yogesh Barve, Gabor Karsai, Abhishek Dubey

Our samplers of RNS and GBO sampled a higher percentage of high-risk scenes of 83% and 92%, compared to 56%, 66% and 71% of the grid, random and Halton samplers, respectively.

Bayesian Optimization Scene Generation

Efficient Out-of-Distribution Detection Using Latent Space of $β$-VAE for Cyber-Physical Systems

no code implementations26 Aug 2021 Shreyas Ramakrishna, Zahra Rahiminasab, Gabor Karsai, Arvind Easwaran, Abhishek Dubey

In this paper, we study this problem as a multi-labeled time series OOD detection problem over images, where the OOD is defined both sequentially across short time windows (change points) as well as across the training data distribution.

Out-of-Distribution Detection Out of Distribution (OOD) Detection +1

ReSonAte: A Runtime Risk Assessment Framework for Autonomous Systems

2 code implementations18 Feb 2021 Charles Hartsell, Shreyas Ramakrishna, Abhishek Dubey, Daniel Stojcsics, Nagabhushan Mahadevan, Gabor Karsai

To help with this process, we provide a scenario modeling procedure that can use the prior distributions of the scenes and threat conditions to generate the data required for estimating the conditional relationships.

Robotics

Workflow Automation for Cyber Physical System Development Processes

no code implementations12 Apr 2020 Charles Hartsell, Nagabhushan Mahadevan, Harmon Nine, Ted Bapty, Abhishek Dubey, Gabor Karsai

Development of Cyber Physical Systems (CPSs) requires close interaction between developers with expertise in many domains to achieve ever-increasing demands for improved performance, reduced cost, and more system autonomy.

Dynamic-Weighted Simplex Strategy for Learning Enabled Cyber Physical Systems

1 code implementation6 Feb 2019 Shreyas Ramakrishna, Charles Hartsell, Matthew P Burruss, Gabor Karsai, Abhishek Dubey

This architecture integrates the system to be assured with a safe controller and provides a decision logic to switch between the decisions of these controllers.

Autonomous Driving Q-Learning

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