Search Results for author: Allen Z. Ren

Found 9 papers, 2 papers with code

Explore until Confident: Efficient Exploration for Embodied Question Answering

no code implementations23 Mar 2024 Allen Z. Ren, Jaden Clark, Anushri Dixit, Masha Itkina, Anirudha Majumdar, Dorsa Sadigh

We consider the problem of Embodied Question Answering (EQA), which refers to settings where an embodied agent such as a robot needs to actively explore an environment to gather information until it is confident about the answer to a question.

Conformal Prediction Efficient Exploration +3

Robots That Ask For Help: Uncertainty Alignment for Large Language Model Planners

no code implementations4 Jul 2023 Allen Z. Ren, Anushri Dixit, Alexandra Bodrova, Sumeet Singh, Stephen Tu, Noah Brown, Peng Xu, Leila Takayama, Fei Xia, Jake Varley, Zhenjia Xu, Dorsa Sadigh, Andy Zeng, Anirudha Majumdar

Large language models (LLMs) exhibit a wide range of promising capabilities -- from step-by-step planning to commonsense reasoning -- that may provide utility for robots, but remain prone to confidently hallucinated predictions.

Conformal Prediction Language Modelling +1

AdaptSim: Task-Driven Simulation Adaptation for Sim-to-Real Transfer

no code implementations9 Feb 2023 Allen Z. Ren, Hongkai Dai, Benjamin Burchfiel, Anirudha Majumdar

Addressing this issue, we propose AdaptSim, a new task-driven adaptation framework for sim-to-real transfer that aims to optimize task performance in target (real) environments -- instead of matching dynamics between simulation and reality.

Leveraging Language for Accelerated Learning of Tool Manipulation

no code implementations27 Jun 2022 Allen Z. Ren, Bharat Govil, Tsung-Yen Yang, Karthik Narasimhan, Anirudha Majumdar

Robust and generalized tool manipulation requires an understanding of the properties and affordances of different tools.

Meta-Learning

Sim-to-Lab-to-Real: Safe Reinforcement Learning with Shielding and Generalization Guarantees

no code implementations20 Jan 2022 Kai-Chieh Hsu, Allen Z. Ren, Duy Phuong Nguyen, Anirudha Majumdar, Jaime F. Fisac

To improve safety, we apply a dual policy setup where a performance policy is trained using the cumulative task reward and a backup (safety) policy is trained by solving the Safety Bellman Equation based on Hamilton-Jacobi (HJ) reachability analysis.

reinforcement-learning Reinforcement Learning (RL) +1

Stronger Generalization Guarantees for Robot Learning by Combining Generative Models and Real-World Data

no code implementations16 Nov 2021 Abhinav Agarwal, Sushant Veer, Allen Z. Ren, Anirudha Majumdar

The key idea behind our approach is to utilize the generative model in order to implicitly specify a prior over policies.

Distributionally Robust Policy Learning via Adversarial Environment Generation

1 code implementation13 Jul 2021 Allen Z. Ren, Anirudha Majumdar

Our goal is to train control policies that generalize well to unseen environments.

Generalization Guarantees for Imitation Learning

2 code implementations5 Aug 2020 Allen Z. Ren, Sushant Veer, Anirudha Majumdar

Control policies from imitation learning can often fail to generalize to novel environments due to imperfect demonstrations or the inability of imitation learning algorithms to accurately infer the expert's policies.

Generalization Bounds Imitation Learning

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