User profiles for Girish Chowdhary
Girish ChowdharyAssociate Professor Verified email at illinois.edu Cited by 8440 |
Research and development in agricultural robotics: A perspective of digital farming
Digital farming is the practice of modern technologies such as sensors, robotics, and data
analysis for shifting from tedious operations to continuously automated processes. This paper …
analysis for shifting from tedious operations to continuously automated processes. This paper …
Concurrent learning adaptive control of linear systems with exponentially convergent bounds
Concurrent learning adaptive controllers, which use recorded and current data concurrently
for adaptation, are developed for model reference adaptive control of uncertain linear …
for adaptation, are developed for model reference adaptive control of uncertain linear …
Aerodynamic parameter estimation from flight data applying extended and unscented Kalman filter
G Chowdhary, R Jategaonkar - Aerospace science and technology, 2010 - Elsevier
Aerodynamic parameter estimation is an integral part of aerospace system design and life
cycle process. Recent advances in computational power have allowed the use of online …
cycle process. Recent advances in computational power have allowed the use of online …
Robust deep reinforcement learning with adversarial attacks
…, Z Tang, S Liu, G Bommannan, G Chowdhary - arXiv preprint arXiv …, 2017 - arxiv.org
This paper proposes adversarial attacks for Reinforcement Learning (RL) and then
improves the robustness of Deep Reinforcement Learning algorithms (DRL) to parameter …
improves the robustness of Deep Reinforcement Learning algorithms (DRL) to parameter …
Theory and flight-test validation of a concurrent-learning adaptive controller
GV Chowdhary, EN Johnson - Journal of Guidance, Control, and …, 2011 - arc.aiaa.org
ADAPTIVE control has been extensively studied for aerospace applications. Many active
research directions exist: for example, Lewis [1], Kim and Lewis [2], and Patiño et al.[3] have …
research directions exist: for example, Lewis [1], Kim and Lewis [2], and Patiño et al.[3] have …
Concurrent learning for parameter estimation using dynamic state-derivative estimators
…, B Reish, G Chowdhary… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
A concurrent learning (CL)-based parameter estimator is developed to identify the unknown
parameters in a nonlinear system. Unlike state-of-the-art CL techniques that assume …
parameters in a nonlinear system. Unlike state-of-the-art CL techniques that assume …
Concurrent learning for convergence in adaptive control without persistency of excitation
G Chowdhary, E Johnson - 49th IEEE Conference on Decision …, 2010 - ieeexplore.ieee.org
We show that for an adaptive controller that uses recorded and instantaneous data concurrently
for adaptation, a verifiable condition on linear independence of the recorded data is …
for adaptation, a verifiable condition on linear independence of the recorded data is …
GPS‐denied indoor and outdoor monocular vision aided navigation and control of unmanned aircraft
GPS‐denied closed‐loop autonomous control of unstable Unmanned Aerial Vehicles (UAVs)
such as rotorcraft using information from a monocular camera has been an open problem. …
such as rotorcraft using information from a monocular camera has been an open problem. …
Bayesian nonparametric adaptive control using Gaussian processes
Most current model reference adaptive control (MRAC) methods rely on parametric adaptive
elements, in which the number of parameters of the adaptive element are fixed a priori, …
elements, in which the number of parameters of the adaptive element are fixed a priori, …
An automated battery management system to enable persistent missions with multiple aerial vehicles
NK Ure, G Chowdhary, T Toksoz… - IEEE/ASME …, 2014 - ieeexplore.ieee.org
This paper presents the development and hardware implementation of an autonomous battery
maintenance mechatronic system that significantly extends the operational time of battery …
maintenance mechatronic system that significantly extends the operational time of battery …