Contraction theory for nonlinear stability analysis and learning-based control: A tutorial overview

H Tsukamoto, SJ Chung, JJE Slotine - Annual Reviews in Control, 2021 - Elsevier
Contraction theory is an analytical tool to study differential dynamics of a non-autonomous
(ie, time-varying) nonlinear system under a contraction metric defined with a uniformly …

Satellite pose estimation competition 2021: Results and analyses

TH Park, M Märtens, M Jawaid, Z Wang, B Chen… - Acta Astronautica, 2023 - Elsevier
This article concerns the second Satellite Pose Estimation Competition (SPEC2021), an
international competition designed to address the challenging problem of domain gap in …

SPEED+: Next-generation dataset for spacecraft pose estimation across domain gap

TH Park, M Märtens, G Lecuyer, D Izzo… - 2022 IEEE Aerospace …, 2022 - ieeexplore.ieee.org
Autonomous vision-based spaceborne navigation is an enabling technology for future on-
orbit servicing and space logistics missions. While computer vision in general has benefited …

[HTML][HTML] A comprehensive survey of space robotic manipulators for on-orbit servicing

M Alizadeh, ZH Zhu - Frontiers in Robotics and AI, 2024 - frontiersin.org
On-Orbit Servicing (OOS) robots are transforming space exploration by enabling vital
maintenance and repair of spacecraft directly in space. However, achieving precise and safe …

Online tree-based planning for active spacecraft fault estimation and collision avoidance

J Ragan, B Riviere, FY Hadaegh, SJ Chung - Science Robotics, 2024 - science.org
Autonomous robots operating in uncertain or hazardous environments subject to state safety
constraints must be able to identify and isolate faulty components in a time-optimal manner …

Neural contraction metrics for robust estimation and control: A convex optimization approach

H Tsukamoto, SJ Chung - IEEE Control Systems Letters, 2020 - ieeexplore.ieee.org
This letter presents a new deep learning-based framework for robust nonlinear estimation
and control using the concept of a Neural Contraction Metric (NCM). The NCM uses a deep …

Monocular-based pose determination of uncooperative space objects

V Capuano, K Kim, A Harvard, SJ Chung - Acta Astronautica, 2020 - Elsevier
Vision-based methods to determine the relative pose of an uncooperative orbiting object are
investigated in applications to spacecraft proximity operations, such as on-orbit servicing …

Information-based guidance and control architecture for multi-spacecraft on-orbit inspection

YK Nakka, W Hönig, C Choi, A Harvard… - Journal of Guidance …, 2022 - arc.aiaa.org
Inspection or map** of a target spacecraft in a low Earth orbit using multiple observer
spacecraft in stable passive relative orbits (PROs) is a key enabling technology for future …

Chance-constrained trajectory optimization for safe exploration and learning of nonlinear systems

YK Nakka, A Liu, G Shi, A Anandkumar… - IEEE Robotics and …, 2020 - ieeexplore.ieee.org
Learning-based control algorithms require data collection with abundant supervision for
training. Safe exploration algorithms ensure the safety of this data collection process even …

Trajectory optimization of chance-constrained nonlinear stochastic systems for motion planning under uncertainty

YK Nakka, SJ Chung - IEEE Transactions on Robotics, 2022 - ieeexplore.ieee.org
In this article, we present generalized polynomial chaos-based sequential convex
programming (gPC-SCP) to compute a suboptimal solution for a continuous-time chance …