Search Results for author: Mohamadreza Ahmadi

Found 14 papers, 0 papers with code

Sample-Based Bounds for Coherent Risk Measures: Applications to Policy Synthesis and Verification

no code implementations21 Apr 2022 Prithvi Akella, Anushri Dixit, Mohamadreza Ahmadi, Joel W. Burdick, Aaron D. Ames

The dramatic increase of autonomous systems subject to variable environments has given rise to the pressing need to consider risk in both the synthesis and verification of policies for these systems.

Risk-Averse Receding Horizon Motion Planning for Obstacle Avoidance using Coherent Risk Measures

no code implementations20 Apr 2022 Anushri Dixit, Mohamadreza Ahmadi, Joel W. Burdick

This paper studies the problem of risk-averse receding horizon motion planning for agents with uncertain dynamics, in the presence of stochastic, dynamic obstacles.

Model Predictive Control Motion Planning

Safe Control for Nonlinear Systems with Stochastic Uncertainty via Risk Control Barrier Functions

no code implementations29 Mar 2022 Andrew Singletary, Mohamadreza Ahmadi, Aaron D. Ames

To this end, we introduce risk control barrier functions (RCBFs), which are compositions of barrier functions and dynamic, coherent risk measures.

Distributionally Robust Model Predictive Control with Total Variation Distance

no code implementations22 Mar 2022 Anushri Dixit, Mohamadreza Ahmadi, Joel W. Burdick

This paper studies the problem of distributionally robust model predictive control (MPC) using total variation distance ambiguity sets.

Computational Efficiency Model Predictive Control

A Scenario Approach to Risk-Aware Safety-Critical System Verification

no code implementations4 Mar 2022 Prithvi Akella, Mohamadreza Ahmadi, Aaron D. Ames

With the growing interest in deploying robots in unstructured and uncertain environments, there has been increasing interest in factoring risk into safety-critical control development.

Risk-Averse Decision Making Under Uncertainty

no code implementations9 Sep 2021 Mohamadreza Ahmadi, Ugo Rosolia, Michel D. Ingham, Richard M. Murray, Aaron D. Ames

In this paper, we consider the problem of designing policies for MDPs and POMDPs with objectives and constraints in terms of dynamic coherent risk measures, which we refer to as the constrained risk-averse problem.

Decision Making Decision Making Under Uncertainty

Risk-Averse Stochastic Shortest Path Planning

no code implementations26 Mar 2021 Mohamadreza Ahmadi, Anushri Dixit, Joel W. Burdick, Aaron D. Ames

We consider the stochastic shortest path planning problem in MDPs, i. e., the problem of designing policies that ensure reaching a goal state from a given initial state with minimum accrued cost.

Constrained Risk-Averse Markov Decision Processes

no code implementations4 Dec 2020 Mohamadreza Ahmadi, Ugo Rosolia, Michel D. Ingham, Richard M. Murray, Aaron D. Ames

We consider the problem of designing policies for Markov decision processes (MDPs) with dynamic coherent risk objectives and constraints.

Risk-Sensitive Motion Planning using Entropic Value-at-Risk

no code implementations23 Nov 2020 Anushri Dixit, Mohamadreza Ahmadi, Joel W. Burdick

We consider the problem of risk-sensitive motion planning in the presence of randomly moving obstacles.

Model Predictive Control Motion Planning

Constrained Active Classification Using Partially Observable Markov Decision Processes

no code implementations10 Aug 2020 Bo Wu, Niklas Lauffer, Mohamadreza Ahmadi, Suda Bharadwaj, Zhe Xu, Ufuk Topcu

The proposed framework relies on assigning a classification belief (a probability distribution) to the attributes of interest.

Attribute Classification +1

Partially Observable Games for Secure Autonomy

no code implementations5 Feb 2020 Mohamadreza Ahmadi, Arun A. Viswanathan, Michel D. Ingham, Kymie Tan, Aaron D. Ames

Technology development efforts in autonomy and cyber-defense have been evolving independently of each other, over the past decade.

Decision Making

Stochastic Finite State Control of POMDPs with LTL Specifications

no code implementations21 Jan 2020 Mohamadreza Ahmadi, Rangoli Sharan, Joel W. Burdick

Partially observable Markov decision processes (POMDPs) provide a modeling framework for autonomous decision making under uncertainty and imperfect sensing, e. g. robot manipulation and self-driving cars.

Decision Making Decision Making Under Uncertainty +3

Risk-Averse Planning Under Uncertainty

no code implementations27 Sep 2019 Mohamadreza Ahmadi, Masahiro Ono, Michel D. Ingham, Richard M. Murray, Aaron D. Ames

We consider the problem of designing policies for partially observable Markov decision processes (POMDPs) with dynamic coherent risk objectives.

The Partially Observable Games We Play for Cyber Deception

no code implementations28 Sep 2018 Mohamadreza Ahmadi, Murat Cubuktepe, Nils Jansen, Sebastian Junges, Joost-Pieter Katoen, Ufuk Topcu

Then, the deception problem is to compute a strategy for the deceiver that minimizes the expected cost of deception against all strategies of the infiltrator.

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