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Nicolas Rojas

19 accepted papers

2025

A Backbone for Long-Horizon Robot Task Understanding

RA-L 2025

End-to-end robot learning, particularly for long-horizon tasks, often results in unpredictable outcomes and poor generalization. To address these challenges, we propose a novel <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Therblig-Based Backbone F

Cited by 8SourceScholar
2023

Learning to Grasp Clothing Structural Regions for Garment Manipulation Tasks

IROS 2023poster

When performing cloth-related tasks, such as garment hanging, it is often important to identify and grasp certain structural regions—a shirt's collar as opposed to its sleeve, for instance. However, due to cloth deformability, these manipulation activities, which are essential in domestic, health ca…

Cited by 11SourceScholar
2023

Mechanical Intelligence for Prehensile In-Hand Manipulation of Spatial Trajectories

ICRA 2023poster

The application of mechanical and other physical properties to the development of robotic systems that can easily adapt to changing external situations is known as mechanical intelligence. Following this concept, many robot hand designs can produce self-adaptive and versatile grasps with simple unde…

Cited by 2SourceScholar
2022

Instinctive Real-time sEMG-based Control of Prosthetic Hand with Reduced Data Acquisition and Embedded Deep Learning Training

ICRA 2022poster

Achieving instinctive multi-grasp control of prosthetic hands typically still requires a large number of sensors, such as electromyography (EMG) electrodes mounted on a residual limb, that can be costly and time consuming to position, with their signals difficult to classify. Deep-learning-based EMG…

Cited by 14SourceScholar
2022

On a Balanced Delta Robot for Precise Aerial Manipulation: Implementation, Testing, and Lessons for Future Designs

IROS 2022poster

Using a delta-manipulator for stabilisation of an end-effector to perform precise spatial positioning is a current area of interest in aerial manipulation. High speed precision movements of a manipulator can cause disturbances to the aerial platform, which hinders trajectory tracking and in some cas…

Cited by 6SourceScholar
2022

Virtual Reality Pre-Prosthetic Hand Training With Physics Simulation and Robotic Force Interaction

RA-L 2022

Virtual reality (VR) rehabilitation systems have been proposed to enable prosthetic hand users to perform training before receiving their prosthesis. Improving pre-prosthetic training to be more representative and better prepare the patient for prosthesis use is a crucial step forwards in rehabilita

Cited by 19SourceScholar
2021

An Underactuated Gripper based on Car Differentials for Self-Adaptive Grasping with Passive Disturbance Rejection

ICRA 2021poster

We introduce an underactuated differential-based robot gripper able to perform self-adaptive grasping with passive disturbance rejection. The gripper utilises three car differential systems to achieve self-adaptiveness with a single actuator: a base differential for distributing power from the motor…

Cited by 9SourceScholar
2020

An Origami-Inspired Variable Friction Surface for Increasing the Dexterity of Robotic Grippers

RA-L 2020

While the grasping capability of robotic grippers has shown significant development, the ability to manipulate objects within the hand is still limited. One explanation for this limitation is the lack of controlled contact variation between the grasped object and the gripper. For instance, human han

Cited by 31SourceScholar
2020

OLYMPIC: A Modular, Tendon-Driven Prosthetic Hand With Novel Finger and Wrist Coupling Mechanisms

RA-L 2020

Prosthetic hands, while having shown significant progress in affordability, typically suffer from limited repairability, specifically by the user themselves. Several modular hands have been proposed to address this, but these solutions require handling of intricate components or are unsuitable for p

Cited by 36SourceScholar
2020

Soft Fingertips With Tactile Sensing and Active Deformation for Robust Grasping of Delicate Objects

RA-L 2020

Soft fingertips have shown significant adaptability for grasping a wide range of object shapes, thanks to elasticity. This ability can be enhanced to grasp soft, delicate objects by adding touch sensing. However, in these cases, the complete restraint and robustness of the grasps have proved to be c

Cited by 63SourceScholar
2020

The RUTH Gripper: Systematic Object-Invariant Prehensile In-Hand Manipulation via Reconfigurable Underactuation

RSS 2020poster

We introduce a reconfigurable underactuated robot hand able to perform systematic prehensile in-hand manipulations regardless of object size or shape. The hand utilises a two-degree-of-freedom five-bar linkage as the palm of the gripper, with three three-phalanx underactuated fingers---jointly contr…

Cited by 8SourcePDFScholar
2017

Between-leg coupling schemes for passively-adaptive non-redundant legged robots

ICRA 2017poster

This paper studies the synthesis of between-leg coupling schemes for passively-adaptive non-redundant legged robots. Highly actuated legged robots can arbitrarily locate their feet relative to their bodies through active control, but often wind up kinematically over-constrained following ground cont…

Cited by 0SourceScholar