compensation error
A General Control Method for Human-Robot Integration
Feder, Maddalena, Grioli, Giorgio, Catalano, Manuel G., Bicchi, Antonio
Abstract--This paper introduces a new generalized control method designed for multi-degrees-of-freedom devices to help people with limited motion capabilities in their daily activities. The challenge lies in finding the most adapted strategy for the control interface to effectively map user's motions in a lowdimensional space to complex robotic assistive devices, such as prostheses, supernumerary limbs, up to remote robotic avatars. The goal is a system which integrates the human and the robotic parts into a unique system, moving so as to reach the targets decided by the human while autonomously reducing the user's effort and discomfort. We present a framework to control general multi DoFs assistive systems, which translates user-performed compensatory motions into the necessary robot commands for reaching targets while canceling or reducing compensation. The framework extends to prostheses of any number of DoF up to full robotic avatars, regarded here as a sort of "whole-body prosthesis" of the person who sees the robot as an artificial extension of their own body without a physical link but with a sensory-motor integration. We have validated and applied this control strategy through tests encompassing simulated scenarios and real-world trials involving a virtual twin of the robotic parts (prosthesis and robot) and a physical humanoid avatar. SSISTIVE and rehabilitation devices such as powered wheelchairs, assistive robotic arms, and limb prostheses play a crucial role in assisting individuals with severe motor impairments [1], which require daily assistance due to e.g.
- Europe > Switzerland (0.04)
- Europe > Italy > Tuscany > Pisa Province > Pisa (0.04)
- Asia > China > Shaanxi Province > Xi'an (0.04)
- Health & Medicine > Health Care Technology (1.00)
- Health & Medicine > Therapeutic Area > Neurology (0.93)
Extraction of n = 0 pick-up by locked mode detectors based on neural networks in J-TEXT
Shen, Chengshuo, Li, Jianchao, Ding, Yonghua, Dong, Jiaolong, Wang, Nengchao, Han, Dongliang., Mao, Feiyue, Li, Da, Chen, Zhipeng, Yang, Zhoujun, Chen, Zhongyong, Pan, Yuan, Team, J-Text
Measurement of locked mode (LM) is important for the physical research of Magnetohydrodynamic (MHD) instabilities and plasma disruption. The n = 0 pick-up need to be extracted and subtracted to calculate the amplitude and phase of the LM. A new method to extract this pick-up has been developed by predicting the n = 0 pick-up brn=0 by the LM detectors based on Neural Networks (NNs) in J-TEXT. An approach called Power Multiple Time Scale (PMTS) has been developed with outstanding regressing effect in multiple frequency ranges. Three models have been progressed based on PMTS NNs. PMTS could fit the brn=0 on the LM detectors with little errors both in time domain and frequency domain. The n>0 pick-up brn>0 generated by resonant magnetic perturbations (RMPs) can be obtained after subtracting the extracted brn=0. This new method uses only one LM instead of 4 LM detectors to extract brn=0. Therefore, the distribution of the LM detectors can also be optimized based on this new method.
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- Europe > United Kingdom > England > Cambridgeshire > Cambridge (0.04)
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