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- W4377090772 abstract "Estimating the distribution over failures is a key step in validating autonomous systems. Existing approaches focus on finding failures for a small range of initial conditions or make restrictive assumptions about the properties of the system under test. We frame estimating the distribution over failure trajectories for sequential systems as Bayesian inference. Our model-based approach represents the distribution over failure trajectories using rollouts of system dynamics and computes trajectory gradients using automatic differentiation. Our approach is demonstrated in an inverted pendulum control system, an autonomous vehicle driving scenario, and a partially observable lunar lander. Sampling is performed using an off-the-shelf implementation of Hamiltonian Monte Carlo with multiple chains to capture multimodality and gradient smoothing for safe trajectories. In all experiments, we observed improvements in sample efficiency and parameter space coverage compared to black-box baseline approaches. This work is open sourced." @default.
- W4377090772 created "2023-05-20" @default.
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- W4377090772 date "2023-05-16" @default.
- W4377090772 modified "2023-09-29" @default.
- W4377090772 title "Model-based Validation as Probabilistic Inference" @default.
- W4377090772 doi "https://doi.org/10.48550/arxiv.2305.09930" @default.
- W4377090772 hasPublicationYear "2023" @default.
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