Search Results for author: Zachary I. Bell

Found 11 papers, 1 papers with code

Uncertainty-Aware Guidance for Target Tracking subject to Intermittent Measurements using Motion Model Learning

1 code implementation1 Feb 2024 Andres Pulido, Kyle Volle, Kristy Waters, Zachary I. Bell, Prashant Ganesh, Jane Shin

This neural network (NN)-based motion model serves as the prediction step in a particle filter for target state estimation and uncertainty quantification.

Position Uncertainty Quantification

An adaptive optimal control approach to monocular depth observability maximization

no code implementations18 Jan 2024 Tochukwu Elijah Ogri, Muzaffar Qureshi, Zachary I. Bell, Kristy Waters, Rushikesh Kamalapurkar

This paper presents an integral concurrent learning (ICL)-based observer for a monocular camera to accurately estimate the Euclidean distance to features on a stationary object, under the restriction that state information is unavailable.

Defending a Static Target Point with a Slow Defender

no code implementations6 Nov 2023 Goutam Das, Michael Dorothy, Zachary I. Bell, Daigo Shishika

This paper studies a target-defense game played between a slow defender and a fast attacker.

Deep Nonlinear Adaptive Control for Unmanned Aerial Systems Operating under Dynamic Uncertainties

no code implementations14 Oct 2023 Zachary Lamb, Zachary I. Bell, Matthew Longmire, Jared Paquet, Prashant Ganesh, Ricardo Sanfelice

Recent literature in the field of machine learning (ML) control has shown promising theoretical results for a Deep Neural Network (DNN) based Nonlinear Adaptive Controller (DNAC) capable of achieving trajectory tracking for nonlinear systems.

State and Parameter Estimation for Affine Nonlinear Systems

no code implementations4 Apr 2023 Tochukwu Elijah Ogri, Zachary I. Bell, Rushikesh Kamalapurkar

Real-world control applications in complex and uncertain environments require adaptability to handle model uncertainties and robustness against disturbances.

Model-based Reinforcement Learning reinforcement-learning

Guarding a Non-Maneuverable Translating Line with an Attached Defender

no code implementations19 Sep 2022 Goutam Das, Michael Dorothy, Zachary I. Bell, Daigo Shishika

In this paper we consider a target-guarding differential game where the defender must protect a linearly translating line-segment by intercepting an attacker who tries to reach it.

A Zeroth-Order Momentum Method for Risk-Averse Online Convex Games

no code implementations6 Sep 2022 Zifan Wang, Yi Shen, Zachary I. Bell, Scott Nivison, Michael M. Zavlanos, Karl H. Johansson

Specifically, the agents use the conditional value at risk (CVaR) as a risk measure and rely on bandit feedback in the form of the cost values of the selected actions at every episode to estimate their CVaR values and update their actions.

Safety aware model-based reinforcement learning for optimal control of a class of output-feedback nonlinear systems

no code implementations1 Oct 2021 S M Nahid Mahmud, Moad Abudia, Scott A Nivison, Zachary I. Bell, Rushikesh Kamalapurkar

The ability to learn and execute optimal control policies safely is critical to realization of complex autonomy, especially where task restarts are not available and/or the systems are safety-critical.

Model-based Reinforcement Learning reinforcement-learning +1

Safe Model-Based Reinforcement Learning for Systems with Parametric Uncertainties

no code implementations24 Jul 2020 S M Nahid Mahmud, Scott A Nivison, Zachary I. Bell, Rushikesh Kamalapurkar

In recent years, reinforcement learning approaches that rely on persistent excitation have been combined with a barrier transformation to learn the optimal control policies under state constraints.

Model-based Reinforcement Learning reinforcement-learning +2

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