no code implementations • 30 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.
no code implementations • 8 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.
1 code implementation • 9 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.
no code implementations • 25 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.
no code implementations • 17 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
1 code implementation • 18 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.
no code implementations • 16 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.
2 code implementations • 1 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
no code implementations • 13 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.
no code implementations • 5 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
no code implementations • 18 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
no code implementations • 12 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.
no code implementations • 20 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
1 code implementation • 1 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