Author name cluster

Radu Corcodel

Possible papers associated with this exact author name in Arrow. This page groups case-insensitive exact name matches and is not a full identity disambiguation profile.

6 papers

1 author row

IROS Conference 2024 Conference Paper

Autonomous Robotic Assembly: From Part Singulation to Precise Assembly

Kei Ota
Devesh K. Jha
Siddarth Jain
Bill Yerazunis
Radu Corcodel
Yash Shukla
Antonia Bronars
Diego Romeres

Imagine a robot that can assemble a functional product from the individual parts presented in any configuration to the robot. Designing such a robotic system is a complex problem which presents several open challenges. To bypass these challenges, the current generation of assembly systems is built with a lot of system integration effort to provide the structure and precision necessary for assembly. These systems are mostly responsible for part singulation, part kitting, and part detection, which is accomplished by intelligent system design. In this paper, we present autonomous assembly of a gear box with minimum requirements on structure. The assembly parts are randomly placed in a two-dimensional work environment for the robot. The proposed system makes use of several different manipulation skills such as sliding for grasping, in-hand manipulation, and insertion to assemble the gear box. All these tasks are run in a closed-loop fashion using vision, tactile, and Force-Torque (F/T) sensors. We perform extensive hardware experiments to show the robustness of the proposed methods as well as the overall system. See supplementary video at https://www.youtube.com/watch?v=cZ9M1DQ23OI.

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ICRA Conference 2024 Conference Paper

Generalize by Touching: Tactile Ensemble Skill Transfer for Robotic Furniture Assembly

Haohong Lin
Radu Corcodel
Ding Zhao

Furniture assembly remains an unsolved problem in robotic manipulation due to its long task horizon and nongeneralizable operations plan. This paper presents the Tactile Ensemble Skill Transfer (TEST) framework, a pioneering offline reinforcement learning (RL) approach that incorporates tactile feedback in the control loop. TEST’s core design is to learn a skill transition model for high-level planning, along with a set of adaptive intra-skill goal-reaching policies. Such design aims to solve the robotic furniture assembly problem in a more generalizable way, facilitating seamless chaining of skills for this long-horizon task. We first sample demonstration from a set of heuristic policies and trajectories consisting of a set of randomized sub-skill segments, enabling the acquisition of rich robot trajectories that capture skill stages, robot states, visual indicators, and crucially, tactile signals. Leveraging these trajectories, our offline RL method discerns skill termination conditions and coordinates skill transitions. Our evaluations highlight the proficiency of TEST on the in-distribution furniture assemblies, its adaptability to unseen furniture configurations, and its robustness against visual disturbances. Ablation studies further accentuate the pivotal role of two algorithmic components: the skill transition model and tactile ensemble policies. Results indicate that TEST can achieve a success rate of 90% and is over 4 times more efficient than the heuristic policy in both in-distribution and generalization settings, suggesting a scalable skill transfer approach for contact-rich manipulation.

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ICRA Conference 2024 Conference Paper

Interactive Planning Using Large Language Models for Partially Observable Robotic Tasks

Lingfeng Sun
Devesh K. Jha
Chiori Hori
Siddarth Jain
Radu Corcodel
Xinghao Zhu
Masayoshi Tomizuka
Diego Romeres

Designing robotic agents to perform open vocabulary tasks has been the long-standing goal in robotics and AI. Recently, Large Language Models (LLMs) have achieved impressive results in creating robotic agents for performing open vocabulary tasks. However, planning for these tasks in the presence of uncertainties is challenging as it requires "chain-of-thought" reasoning, aggregating information from the environment, updating state estimates, and generating actions based on the updated state estimates. In this paper, we present an interactive planning technique for partially observable tasks using LLMs. In the proposed method, an LLM is used to collect missing information from the environment using a robot, and infer the state of the underlying problem from collected observations while guiding the robot to perform the required actions. We also use a fine-tuned Llama 2 model via self-instruct and compare its performance against a pre-trained LLM like GPT-4. Results are demonstrated on several tasks in simulation as well as real-world environments.

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IROS Conference 2023 Conference Paper

Constrained Dynamic Movement Primitives for Collision Avoidance in Novel Environments

Seiji Shaw
Devesh K. Jha
Arvind U. Raghunathan
Radu Corcodel
Diego Romeres
George Konidaris 0001
Daniel Nikovski

Dynamic movement primitives are widely used for learning skills that can be demonstrated to a robot by a skilled human or controller. While their generalization capabilities and simple formulation make them very appealing to use, they possess no strong guarantees to satisfy operational safety constraints for a task. We present constrained dynamic movement primitives (CDMPs), which can allow for positional constraint satisfaction in the robot workspace. Our method solves a non-linear optimization to perturb an existing DMP's forcing weights to admit a Zeroing Barrier Function (ZBF), which certifies positional workspace constraint satisfaction. We demonstrate our approach under different positional constraints on the end-effector movement on multiple physical robots, such as obstacle avoidance and workspace limitations.

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IROS Conference 2020 Conference Paper

Interactive Tactile Perception for Classification of Novel Object Instances

Radu Corcodel
Siddarth Jain
Jeroen van Baar

In this paper, we present a novel approach for classification of unseen object instances from interactive tactile feedback. Furthermore, we demonstrate the utility of a low resolution tactile sensor array for tactile perception that can potentially close the gap between vision and physical contact for manipulation. We contrast our sensor to high-resolution camera-based tactile sensors. Our proposed approach interactively learns a one-class classification model using 3D tactile descriptors, and thus demonstrates an advantage over the existing approaches, which require pre-training on objects. We describe how we derive 3D features from the tactile sensor inputs, and exploit them for learning one-class classifiers. In addition, since our proposed method uses unsupervised learning, we do not require ground truth labels. This makes our proposed method flexible and more practical for deployment on robotic systems. We validate our proposed method on a set of household objects and results indicate good classification performance in real-world experiments.

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ICRA Conference 2020 Conference Paper

Tuning-Free Contact-Implicit Trajectory Optimization

Aykut Özgün Önol
Radu Corcodel
Philip Long
Taskin Padir

We present a contact-implicit trajectory optimization framework that can plan contact-interaction trajectories for different robot architectures and tasks using a trivial initial guess and without requiring any parameter tuning. This is achieved by using a relaxed contact model along with an automatic penalty adjustment loop for suppressing the relaxation. Moreover, the structure of the problem enables us to exploit the contact information implied by the use of relaxation in the previous iteration, such that the solution is explicitly improved with little computational overhead. We test the proposed approach in simulation experiments for non-prehensile manipulation using a 7-DOF arm and a mobile robot and for planar locomotion using a humanoid-like robot in zero gravity. The results demonstrate that our method provides an out-of-the-box solution with good performance for a wide range of applications.

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