finger flexion
Unknown Object Grasping for Assistive Robotics
Miller, Elle, Durner, Maximilian, Humt, Matthias, Quere, Gabriel, Boerdijk, Wout, Sundaram, Ashok M., Stulp, Freek, Vogel, Jorn
We propose a novel pipeline for unknown object grasping in shared robotic autonomy scenarios. State-of-the-art methods for fully autonomous scenarios are typically learning-based approaches optimised for a specific end-effector, that generate grasp poses directly from sensor input. In the domain of assistive robotics, we seek instead to utilise the user's cognitive abilities for enhanced satisfaction, grasping performance, and alignment with their high level task-specific goals. Given a pair of stereo images, we perform unknown object instance segmentation and generate a 3D reconstruction of the object of interest. In shared control, the user then guides the robot end-effector across a virtual hemisphere centered around the object to their desired approach direction. A physics-based grasp planner finds the most stable local grasp on the reconstruction, and finally the user is guided by shared control to this grasp. In experiments on the DLR EDAN platform, we report a grasp success rate of 87% for 10 unknown objects, and demonstrate the method's capability to grasp objects in structured clutter and from shelves.
Anatomically Constrained Decoding of Finger Flexion from Electrocorticographic Signals
Brain-computer interfaces (BCIs) use brain signals to convey a user's intent. Some BCI approaches begin by decoding kinematic parameters of movements from brain signals, and then proceed to using these signals, in absence of movements, to allow a user to control an output. Recent results have shown that electrocorticographic (ECoG) recordings from the surface of the brain in humans can give information about kinematic parameters (e.g., hand velocity or finger flexion). The decoding approaches in these demonstrations usually employed classical classification/regression algorithms that derive a linear mapping between brain signals and outputs. However, they typically only incorporate little prior information about the target kinematic parameter.
Towards Tenodesis-Modulated Control of an Assistive Hand Exoskeleton for SCI
Palacios, Joaquin, Deli-Ivanov, Alexandra, Chen, Ava, Winterbottom, Lauren, Nilsen, Dawn M., Stein, Joel, Ciocarlie, Matei
A Spinal Cord Injury (SCI) can have life-altering consequences, and with an estimated 18,000 yearly cases in the US, the societal impact cannot be overstated [1]. SCI often results in partial or complete sensorimotor loss in the arms and body, leading to limited independence. As such, restoration of hand function is one of the highest priorities for SCI populations [2]. Many individuals with C6-C7 SCI have preserved wrist mobility and use tenodesis to grasp. Tenodesis can achieve some degree of lateral pinch and grasp by exploiting the Figure 1: MyHand-SCI assists finger flexion for grasping without passive finger flexion that occurs when the wrist is extended.
Anatomically Constrained Decoding of Finger Flexion from Electrocorticographic Signals
Brain-computer interfaces (BCIs) use brain signals to convey a user's intent. Some BCI approaches begin by decoding kinematic parameters of movements from brain signals, and then proceed to using these signals, in absence of movements, to allow a user to control an output. Recent results have shown that electrocorticographic (ECoG) recordings from the surface of the brain in humans can give information about kinematic parameters (e.g., hand velocity or finger flexion). The decoding approaches in these demonstrations usually employed classical classification/regression algorithms that derive a linear mapping between brain signals and outputs. However, they typically only incorporate little prior information about the target kinematic parameter.
Anatomically Constrained Decoding of Finger Flexion from Electrocorticographic Signals
Wang, Zuoguan, Schalk, Gerwin, Ji, Qiang
Brain-computer interfaces (BCIs) use brain signals to convey a user's intent. Some BCI approaches begin by decoding kinematic parameters of movements from brain signals, and then proceed to using these signals, in absence of movements, to allow a user to control an output. Recent results have shown that electrocorticographic (ECoG) recordings from the surface of the brain in humans can give information about kinematic parameters (e.g., hand velocity or finger flexion). The decoding approaches in these demonstrations usually employed classical classification/regression algorithms that derive a linear mapping between brain signals and outputs. However, they typically only incorporate little prior information about the target kinematic parameter.
Anatomically Constrained Decoding of Finger Flexion from Electrocorticographic Signals
Wang, Zuoguan, Schalk, Gerwin, Ji, Qiang
Brain-computer interfaces (BCIs) use brain signals to convey a user's intent. Some BCI approaches begin by decoding kinematic parameters of movements from brain signals, and then proceed to using these signals, in absence of movements, to allow a user to control an output. Recent results have shown that electrocorticographic (ECoG) recordings from the surface of the brain in humans can give information about kinematic parameters (e.g., hand velocity or finger flexion). The decoding approaches in these demonstrations usually employed classical classification/regression algorithms that derive a linear mapping between brain signals and outputs. However, they typically only incorporate little prior information about the target kinematic parameter.
Anatomically Constrained Decoding of Finger Flexion from Electrocorticographic Signals
Wang, Zuoguan, Schalk, Gerwin, Ji, Qiang
Brain-computer interfaces (BCIs) use brain signals to convey a user's intent. Some BCI approaches begin by decoding kinematic parameters of movements from brain signals, and then proceed to using these signals, in absence of movements, to allow a user to control an output. Recent results have shown that electrocorticographic (ECoG)recordings from the surface of the brain in humans can give information about kinematic parameters (e.g., hand velocity or finger flexion). The decoding approaches in these demonstrations usually employed classical classification/regression algorithmsthat derive a linear mapping between brain signals and outputs. However, they typically only incorporate little prior information about the target kinematic parameter.