Search Results for author: Nick Cheney

Found 17 papers, 8 papers with code

Towards Multi-Morphology Controllers with Diversity and Knowledge Distillation

1 code implementation22 Apr 2024 Alican Mertan, Nick Cheney

Finding controllers that perform well across multiple morphologies is an important milestone for large-scale robotics, in line with recent advances via foundation models in other areas of machine learning.

Knowledge Distillation

Investigating Premature Convergence in Co-optimization of Morphology and Control in Evolved Virtual Soft Robots

no code implementations14 Feb 2024 Alican Mertan, Nick Cheney

We hope the insights we share with this work attract more attention to the problem and help us to enable efficient brain-body co-optimization.

Reset It and Forget It: Relearning Last-Layer Weights Improves Continual and Transfer Learning

no code implementations12 Oct 2023 Lapo Frati, Neil Traft, Jeff Clune, Nick Cheney

We show that our zapping procedure results in improved transfer accuracy and/or more rapid adaptation in both standard fine-tuning and continual learning settings, while being simple to implement and computationally efficient.

Continual Learning Meta-Learning +1

Many-objective Optimization via Voting for Elites

1 code implementation5 Jul 2023 Jackson Dean, Nick Cheney

Current approaches to many-objective optimization often require challenging assumptions, like knowledge of the importance/difficulty of objectives in a weighted-sum single-objective paradigm, or enormous populations to overcome the curse of dimensionality in multi-objective Pareto optimization.

Evolutionary Algorithms

Coping with seasons: evolutionary dynamics of gene networks in a changing environment

1 code implementation4 Jul 2023 Csenge Petak, Lapo Frati, Melissa H. Pespeni, Nick Cheney

In contrast, conservative bet-hedgers have a set of offspring that all have an in-between phenotype compared to the specialists.

Modular Controllers Facilitate the Co-Optimization of Morphology and Control in Soft Robots

1 code implementation12 Jun 2023 Alican Mertan, Nick Cheney

Soft robotics is a rapidly growing area of robotics research that would benefit greatly from design automation, given the challenges of manually engineering complex, compliant, and generally non-intuitive robot body plans and behaviors.

Picking up the pieces: separately evaluating supernet training and architecture selection

no code implementations29 Sep 2021 Gabriel Meyer-Lee, Nick Cheney

We frame supernet NAS as a two-stage search, decoupling the training of the supernet from the extraction of a final design from the supernet.

Neural Architecture Search

Continual learning under domain transfer with sparse synaptic bursting

no code implementations26 Aug 2021 Shawn L. Beaulieu, Jeff Clune, Nick Cheney

Past efforts to engineer such systems have sought to build or regulate artificial neural networks using disjoint sets of weights that are uniquely sensitive to specific tasks or inputs.

Continual Learning Meta-Learning

Learning to Continually Learn

5 code implementations21 Feb 2020 Shawn Beaulieu, Lapo Frati, Thomas Miconi, Joel Lehman, Kenneth O. Stanley, Jeff Clune, Nick Cheney

Continual lifelong learning requires an agent or model to learn many sequentially ordered tasks, building on previous knowledge without catastrophically forgetting it.

Continual Learning Meta-Learning

Embodiment dictates learnability in neural controllers

no code implementations15 Oct 2019 Joshua Powers, Ryan Grindle, Sam Kriegman, Lapo Frati, Nick Cheney, Josh Bongard

Catastrophic forgetting continues to severely restrict the learnability of controllers suitable for multiple task environments.

Interoceptive robustness through environment-mediated morphological development

1 code implementation6 Apr 2018 Sam Kriegman, Nick Cheney, Francesco Corucci, Josh C. Bongard

Typically, AI researchers and roboticists try to realize intelligent behavior in machines by tuning parameters of a predefined structure (body plan and/or neural network architecture) using evolutionary or learning algorithms.

How morphological development can guide evolution

1 code implementation20 Nov 2017 Sam Kriegman, Nick Cheney, Josh Bongard

Here, we report on a previously unknown phenomenon when embodied agents are allowed to develop and evolve: Evolution discovers body plans robust to control changes, these body plans become genetically assimilated, yet controllers for these agents are not assimilated.

Evolving soft locomotion in aquatic and terrestrial environments: effects of material properties and environmental transitions

no code implementations17 Nov 2017 Francesco Corucci, Nick Cheney, Francesco Giorgio-Serchi, Josh Bongard, Cecilia Laschi

Designing soft robots poses considerable challenges: automated design approaches may be particularly appealing in this field, as they promise to optimize complex multi-material machines with very little or no human intervention.

A Minimal Developmental Model Can Increase Evolvability in Soft Robots

1 code implementation22 Jun 2017 Sam Kriegman, Nick Cheney, Francesco Corucci, Josh C. Bongard

Different subsystems of organisms adapt over many time scales, such as rapid changes in the nervous system (learning), slower morphological and neurological change over the lifetime of the organism (postnatal development), and change over many generations (evolution).

Scalable Co-Optimization of Morphology and Control in Embodied Machines

no code implementations19 Jun 2017 Nick Cheney, Josh Bongard, Vytas SunSpiral, Hod Lipson

In psychology, the theory of embodied cognition posits that behavior arises from a close coupling between body plan and sensorimotor control, which suggests why co-optimizing these two subsystems is so difficult: most evolutionary changes to morphology tend to adversely impact sensorimotor control, leading to an overall decrease in behavioral performance.

Hands-free Evolution of 3D-printable Objects via Eye Tracking

no code implementations17 Apr 2013 Nick Cheney, Jeff Clune, Jason Yosinski, Hod Lipson

Interactive evolution has shown the potential to create amazing and complex forms in both 2-D and 3-D settings.

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