Search Results for author: Christopher Iliffe Sprague

Found 7 papers, 0 papers with code

Stable Autonomous Flow Matching

no code implementations8 Feb 2024 Christopher Iliffe Sprague, Arne Elofsson, Hossein Azizpour

Despite this, connections between control theory and generative models in the literature are sparse, even though there are several machine learning applications with physically stable data points.

An Extended Convergence Result for Behaviour Tree Controllers

no code implementations17 Aug 2023 Christopher Iliffe Sprague, Petter Ögren

Behavior trees (BTs) are an optimally modular framework to assemble hierarchical hybrid control policies from a set of low-level control policies using a tree structure.

Continuous-Time Behavior Trees as Discontinuous Dynamical Systems

no code implementations3 Sep 2021 Christopher Iliffe Sprague, Petter Ögren

In this letter, we provide the first continuous-time formulation of behavior trees, show that they can be seen as discontinuous dynamical systems (a subclass of hybrid dynamical systems), which enables the application of existence and uniqueness results to behavior trees, and finally, provide sufficient conditions under which such systems will converge to a desired region of the state space for general designs.

PointNetKL: Deep Inference for GICP Covariance Estimation in Bathymetric SLAM

no code implementations24 Mar 2020 Ignacio Torroba, Christopher Iliffe Sprague, Nils Bore, John Folkesson

However, an accurate estimate of the uncertainty of such registration is a key requirement to a consistent fusion of this kind of measurements in a SLAM filter.

Autonomous Vehicles

Learning Dynamic-Objective Policies from a Class of Optimal Trajectories

no code implementations27 Feb 2019 Christopher Iliffe Sprague, Dario Izzo, Petter Ögren

In this paper, we present a novel and straightforward approach to synthesising these policies through a combination of trajectory optimisation, homotopy continuation, and imitation learning.

Imitation Learning

Improving the Modularity of AUV Control Systems using Behaviour Trees

no code implementations1 Nov 2018 Christopher Iliffe Sprague, Özer Özkahraman, Andrea Munafo, Rachel Marlow, Alexander Phillips, Petter Ögren

In this paper, we show how behaviour trees (BTs) can be used to design modular, versatile, and robust control architectures for mission-critical systems.

Adding Neural Network Controllers to Behavior Trees without Destroying Performance Guarantees

no code implementations26 Sep 2018 Christopher Iliffe Sprague, Petter Ögren

In this paper, we show how Behavior Trees that have performance guarantees, in terms of safety and goal convergence, can be extended with components that were designed using machine learning, without destroying those performance guarantees.

BIG-bench Machine Learning

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