Search Results for author: Bike Zhang

Found 10 papers, 3 papers with code

Humanoid Locomotion as Next Token Prediction

no code implementations29 Feb 2024 Ilija Radosavovic, Bike Zhang, Baifeng Shi, Jathushan Rajasegaran, Sarthak Kamat, Trevor Darrell, Koushil Sreenath, Jitendra Malik

We cast real-world humanoid control as a next token prediction problem, akin to predicting the next word in language.

Humanoid Control

Prompt a Robot to Walk with Large Language Models

1 code implementation18 Sep 2023 Yen-Jen Wang, Bike Zhang, Jianyu Chen, Koushil Sreenath

Large language models (LLMs) pre-trained on vast internet-scale data have showcased remarkable capabilities across diverse domains.

Real-World Humanoid Locomotion with Reinforcement Learning

no code implementations6 Mar 2023 Ilija Radosavovic, Tete Xiao, Bike Zhang, Trevor Darrell, Jitendra Malik, Koushil Sreenath

Humanoid robots that can autonomously operate in diverse environments have the potential to help address labour shortages in factories, assist elderly at homes, and colonize new planets.

reinforcement-learning

Recursively Feasible Probabilistic Safe Online Learning with Control Barrier Functions

no code implementations23 Aug 2022 Fernando Castañeda, Jason J. Choi, Wonsuhk Jung, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

This feasibility analysis results in a set of richness conditions that the available information about the system should satisfy to guarantee that a safe control action can be found at all times.

Out-of-Distribution Detection

Learning Torque Control for Quadrupedal Locomotion

no code implementations10 Mar 2022 Shuxiao Chen, Bike Zhang, Mark W. Mueller, Akshara Rai, Koushil Sreenath

Reinforcement learning (RL) has become a promising approach to developing controllers for quadrupedal robots.

Position Reinforcement Learning (RL)

Learning Differentiable Safety-Critical Control using Control Barrier Functions for Generalization to Novel Environments

no code implementations4 Jan 2022 Hengbo Ma, Bike Zhang, Masayoshi Tomizuka, Koushil Sreenath

By embedding the optimization procedure of the exponential control barrier function based quadratic program (ECBF-QP) as a differentiable layer within a deep learning architecture, we propose a differentiable safety-critical control framework that enables generalization to new environments for high relative-degree systems with forward invariance guarantees.

Pointwise Feasibility of Gaussian Process-based Safety-Critical Control under Model Uncertainty

no code implementations13 Jun 2021 Fernando Castañeda, Jason J. Choi, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

However, since these constraints rely on a model of the system, when this model is inaccurate the guarantees of safety and stability can be easily lost.

Rule-Based Safety-Critical Control Design using Control Barrier Functions with Application to Autonomous Lane Change

1 code implementation23 Mar 2021 Suiyi He, Jun Zeng, Bike Zhang, Koushil Sreenath

This paper develops a new control design for guaranteeing a vehicle's safety during lane change maneuvers in a complex traffic environment.

Gaussian Process-based Min-norm Stabilizing Controller for Control-Affine Systems with Uncertain Input Effects and Dynamics

no code implementations14 Nov 2020 Fernando Castañeda, Jason J. Choi, Bike Zhang, Claire J. Tomlin, Koushil Sreenath

This paper presents a method to design a min-norm Control Lyapunov Function (CLF)-based stabilizing controller for a control-affine system with uncertain dynamics using Gaussian Process (GP) regression.

regression

Safety-Critical Model Predictive Control with Discrete-Time Control Barrier Function

2 code implementations22 Jul 2020 Jun Zeng, Bike Zhang, Koushil Sreenath

In order to obtain safe optimal performance in the context of set invariance, we present a safety-critical model predictive control strategy utilizing discrete-time control barrier functions (CBFs), which guarantees system safety and accomplishes optimal performance via model predictive control.

Car Racing Model Predictive Control

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