Search Results for author: Richard Linares

Found 14 papers, 4 papers with code

Language Models are Spacecraft Operators

no code implementations30 Mar 2024 Victor Rodriguez-Fernandez, Alejandro Carrasco, Jason Cheng, Eli Scharf, Peng Mun Siew, Richard Linares

Recent trends are emerging in the use of Large Language Models (LLMs) as autonomous agents that take actions based on the content of the user text prompts.

Decision Making Prompt Engineering

Towards a Machine Learning-Based Approach to Predict Space Object Density Distributions

no code implementations8 Jan 2024 Victor Rodriguez-Fernandez, Sumiyajav Sarangerel, Peng Mun Siew, Pablo Machuca, Daniel Jang, Richard Linares

With the rapid increase in the number of Anthropogenic Space Objects (ASOs), Low Earth Orbit (LEO) is facing significant congestion, thereby posing challenges to space operators and risking the viability of the space environment for varied uses.

Improving Computational Efficiency for Powered Descent Guidance via Transformer-based Tight Constraint Prediction

1 code implementation9 Nov 2023 Julia Briden, Trey Gurga, Breanna Johnson, Abhishek Cauligi, Richard Linares

T-PDG uses data from prior runs of trajectory optimization algorithms to train a transformer neural network, which accurately predicts the relationship between problem parameters and the globally optimal solution for the powered descent guidance problem.

Computational Efficiency Time Series

Transformer-based Atmospheric Density Forecasting

no code implementations25 Oct 2023 Julia Briden, Peng Mun Siew, Victor Rodriguez-Fernandez, Richard Linares

As the peak of the solar cycle approaches in 2025 and the ability of a single geomagnetic storm to significantly alter the orbit of Resident Space Objects (RSOs), techniques for atmospheric density forecasting are vital for space situational awareness.

Approximate Analytical Solution to the Zonal Harmonics Problem Using Koopman Operator Theory

no code implementations17 Dec 2020 David Arnas, Richard Linares

This work introduces the use of the Koopman operator theory to generate approximate analytical solutions for the zonal harmonics problem of a satellite orbiting a non-spherical celestial body.

Earth and Planetary Astrophysics Functional Analysis Space Physics

Reinforcement Meta-Learning for Interception of Maneuvering Exoatmospheric Targets with Parasitic Attitude Loop

1 code implementation18 Apr 2020 Brian Gaudet, Roberto Furfaro, Richard Linares, Andrea Scorsoglio

We use Reinforcement Meta-Learning to optimize an adaptive integrated guidance, navigation, and control system suitable for exoatmospheric interception of a maneuvering target.

Meta-Learning

Six Degree-of-Freedom Body-Fixed Hovering over Unmapped Asteroids via LIDAR Altimetry and Reinforcement Meta-Learning

no code implementations16 Nov 2019 Brian Gaudet, Richard Linares, Roberto Furfaro

This allows the deployed policy to generalize well to novel asteroid characteristics, which we demonstrate in our experiments.

Meta-Learning Position

Real-Time Thermospheric Density Estimation Via Two-Line-Element Data Assimilation

2 code implementations1 Oct 2019 David Gondelach, Richard Linares

Inaccurate estimates of the thermospheric density are a major source of error in low Earth orbit prediction.

Space Physics Earth and Planetary Astrophysics Dynamical Systems Atmospheric and Oceanic Physics

Seeker based Adaptive Guidance via Reinforcement Meta-Learning Applied to Asteroid Close Proximity Operations

no code implementations13 Jul 2019 Brian Gaudet, Richard Linares, Roberto Furfaro

Finally, we suggest a concept of operations for asteroid close proximity maneuvers that is compatible with the guidance system.

Meta-Learning

Reinforcement Learning for Angle-Only Intercept Guidance of Maneuvering Targets

no code implementations5 Jun 2019 Brian Gaudet, Roberto Furfaro, Richard Linares

We present a novel guidance law that uses observations consisting solely of seeker line of sight angle measurements and their rate of change.

Systems and Control

Adaptive Guidance and Integrated Navigation with Reinforcement Meta-Learning

no code implementations18 Apr 2019 Brian Gaudet, Richard Linares, Roberto Furfaro

We also demonstrate the ability of a RL meta-learning optimized policy to implement a guidance law using observations consisting of only Doppler radar altimeter readings in a Mars landing environment, and LIDAR altimeter readings in an asteroid landing environment, thus integrating guidance and navigation.

Systems and Control

Learning Accurate Extended-Horizon Predictions of High Dimensional Trajectories

no code implementations12 Jan 2019 Brian Gaudet, Richard Linares, Roberto Furfaro

Instead, we learn a mapping from the first observation in an episode to the hidden state, allowing the trained model to immediately produce accurate predictions.

Vocal Bursts Intensity Prediction

Deep Reinforcement Learning for Six Degree-of-Freedom Planetary Powered Descent and Landing

no code implementations20 Oct 2018 Brian Gaudet, Richard Linares, Roberto Furfaro

The latter requires both a navigation system capable of estimating the lander's state in real-time and a guidance and control system that can map the estimated lander state to a commanded thrust for each lander engine.

Systems and Control

Random Finite Set Theory and Centralized Control of Large Collaborative Swarms

1 code implementation1 Oct 2018 Bryce Doerr, Richard Linares, Pingping Zhu, Silvia Ferrari

Additionally, the RFS control formulation is shown to be very flexible in terms of the number of agents in the swarm and configuration of the desired Gaussian mixtures.

Systems and Control

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