Hybrid artificial muscle underactuated humanoid robotic hand

2017 ◽  
Author(s):  
Yang Chen ◽  
Shaofei Guo ◽  
Jinhai Gao ◽  
Lina Hao ◽  
Chao Han
Keyword(s):  
Artificial Muscle ◽  
Robotic Hand

scholarly journals Modeling and Simulation of Robotic Finger Powered by Nylon Artificial Muscles

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Lokesh Saharan ◽  
Lianjun Wu ◽  
Yonas Tadesse
Keyword(s):  
High Performance ◽  
Electrical Power ◽  
Simulated Data ◽  
Artificial Muscle ◽  
Power Input ◽  
Artificial Muscles ◽  
Robotic Hand ◽  
Finger Motion ◽  
Angular Displacements ◽  
Measured Input

Abstract A robotic finger actuated by novel artificial muscles known as twisted and coiled polymer (TCP) muscles has been proposed as an inexpensive, yet high-performance component of a robotic hand in recent years. In this paper, the Euler–Lagrangian method coupled with an electro-thermo-mechanical model-based transfer function was used for the analysis of finger joints in the hand. Experiments were performed at three power magnitudes provided to the TCP muscles, and the output angular displacements of the index finger subtended corresponding to the power levels were measured. The measured input and output parameters were used for system identification. To elucidate how the new artificial muscle influences the finger motion, two types of numerical simulations were performed: force input simulation (FIS) using measured force as an input and power input simulation (PIS) using measured electrical power as an input. Results were quantified statistically, and the simulated data were compared with the experimental results. Sensitivity analysis was also presented to understand the effect of the mechanical properties on the system. This model will help in understanding the effect of the TCP muscles and other similar smart actuators on the dynamics of the robotic finger.

scholarly journals A Fuzzy Logic Control System for a Robotic Hand Driven by Shape Memory Alloy Wires

2019 ◽  
Vol 4 (10) ◽  
pp. 173-178
Author(s):  
André Silva ◽  
Samuel De Oliveira ◽  
Andreas Ries ◽  
Simplício A. Silva ◽  
Cícero Souto
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Shape Memory ◽  
Artificial Muscle ◽  
Human Hand ◽  
Practical Implementation ◽  
Robotic Hand ◽  
Logic Control ◽  
3D Printed ◽  
Niti Wires

This paper presents a robotic hand using wires with shape memory (NiTi) as non-conventional actuators. The mechanical structure of the robot hand was first designed by means of a CAD computer program and afterwards 3D printed using ABS polymer. The robotic hand was designed according to the physiological characteristics of the human hand, with particular attention to the angles formed by the phalanges of the fingers. A mechanical system accommodates the thin NiTi wires compactly, thus forming an artificial muscle. A fuzzy logic based control system allows an accurate positioning of each phalanx. The contribution of the present work to science lies in the practical implementation of known techniques and materials.

A shape memory alloy-based tendon-driven actuation system for biomimetic artificial fingers, part I: design and evaluation

Robotica ◽  
2009 ◽  
Vol 27 (1) ◽  
pp. 131-146 ◽  
Author(s):  
Vishalini Bundhoo ◽  
Edmund Haslam ◽  
Benjamin Birch ◽  
Edward J. Park
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Ad Hoc ◽  
Controller Design ◽  
Artificial Muscle ◽  
Robotic Hand ◽  
Pulse Width Modulated ◽  
Actuation System ◽  
Minimum Jerk ◽  
Flexion Extension

SUMMARYIn this paper, a new biomimetic tendon-driven actuation system for prosthetic and wearable robotic hand applications is presented. It is based on the combination of compliant tendon cables and one-way shape memory alloy (SMA) wires that form a set of agonist–antagonist artificial muscle pairs for the required flexion/extension or abduction/adduction of the finger joints. The performance of the proposed actuation system is demonstrated using a 4 degree-of-freedom (three active and one passive) artificial finger testbed, also developed based on a biomimetic design approach. A microcontroller-based pulse-width-modulated proportional-derivation (PWM-PD) feedback controller and a minimum jerk trajectory feedforward controller are implemented and tested in anad hocfashion to evaluate the performance of the finger system in emulating natural joint motions. Part II describes the dynamic modeling of the above nonlinear system, and the model-based controller design.

A Study on Anthropomorphic Robot Hand Simulation Driven by SMA Wire Using Segment Control

2007 ◽  
Vol 345-346 ◽  
pp. 1249-1252 ◽  
Author(s):  
Kyoung Rae Cha ◽  
Gwang Ho Kim ◽  
Ju Hwan Kim ◽  
Sang Hwa Jeong
Keyword(s):  
Energy Density ◽  
Dynamic Characteristics ◽  
Weight Ratio ◽  
Artificial Muscle ◽  
Robotic Systems ◽  
Robotic Hand ◽  
Electromechanical Actuators ◽  
New Approach ◽  
And Control ◽  
Thermal States

In recent years, as the robot technology is developed, the researches on the artificial muscle actuator that enables robot to move dexterously like biological organ become active. Actuators are one of the key technologies underpinning robotics. Particularly breakthroughs of power-to-weight ratio or energy-density in actuator technology have significant impacts upon the design and the control of robotic systems. The widely used materials for artificial muscle are the shape memory alloy and electro-active polymer. These actuators have the higher energy density than the electromechanical actuators such as the electric motor. However, there are some drawbacks because these actuators have the hysteretic dynamic characteristics. In this paper, the segment control for reducing the hysteresis of SMA is proposed and the simulation of an anthropomorphic robotic hand is performed using ADAMS. A new approach to design and control of SMA actuators is presented. SMA wire is divided into many segments and their thermal states are controlled individually in a binary manner(ON/OFF). The basic experiment for evaluating the dynamic characteristics of SMA wire actuator is performed.

Dynamic Analysis Method for Electromagnetic Artificial Muscle Actuator under PID Control

2011 ◽  
Vol 131 (2) ◽  
pp. 166-170 ◽  
Author(s):  
Yoshihiro Nakata ◽  
Hiroshi Ishiguro ◽  
Katsuhiro Hirata
Keyword(s):  
Dynamic Analysis ◽  
Pid Control ◽  
Artificial Muscle ◽  
Analysis Method

A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension

2019 ◽  
Vol 12 (4) ◽  
pp. 357-366
Author(s):  
Yong Song ◽  
Shichuang Liu ◽  
Jiangxuan Che ◽  
Jinyi Lian ◽  
Zhanlong Li ◽  
...  
Keyword(s):  
Strong Shock ◽  
Artificial Muscle ◽  
Suspension System ◽  
Vehicle Body ◽  
Vehicle Suspension ◽  
Pneumatic Artificial Muscle ◽  
Advantages And Disadvantages ◽  
Road Excitation ◽  
Vehicle Suspension System ◽  
Suspension Structure

Background: Vehicles generally travel on different road conditions, and withstand strong shock and vibration. In order to reduce or isolate the strong shock and vibration, it is necessary to propose and develop a high-performance vehicle suspension system. Objective: This study aims to report a pneumatic artificial muscle bionic kangaroo leg suspension to improve the comfort performance of vehicle suspension system. Methods: In summarizing the existing vehicle suspension systems and analyzing their advantages and disadvantages, this paper introduces a new patent of vehicle suspension system based on the excellent damping and buffering performance of kangaroo leg, A Pneumatic Artificial Muscle Bionic Kangaroo Leg Suspension. According to the biomimetic principle, the pneumatic artificial muscles bionic kangaroo leg suspension with equal bone ratio is constructed on the basis of the kangaroo leg crural index, and two working modes (passive and active modes) are designed for the suspension. Moreover, the working principle of the suspension system is introduced, and the rod system equations for the suspension structure are built up. The characteristic simulation model of this bionic suspension is established in Adams, and the vertical performance is analysed. Results: It is found that the largest deformation happens in the bionic heel spring and the largest angle change occurs in the bionic ankle joint under impulse road excitation, which is similar to the dynamic characteristics of kangaroo leg. Furthermore, the dynamic displacement and the acceleration of the vehicle body are both sharply reduced. Conclusion: The simulation results show that the comfort performance of this bionic suspension is excellent under the impulse road excitation, which indicates the bionic suspension structure is feasible and reasonable to be applied to vehicle suspensions.

Development of A Small Clamper for Tendon-sheath Artificial Muscle

2018 ◽  
Author(s):  
Qi Zhang ◽  
Xiaopeng Shen ◽  
Xingsong Wang ◽  
Mengqian Tian ◽  
Mingxing Yang ◽  
...  
Keyword(s):  
Artificial Muscle ◽  
Tendon Sheath

A simplified model of a multi-jointed mechanical finger calibrated with experimental data by vision system

2021 ◽  
Vol 235 (1) ◽  
pp. 164-175
Author(s):  
C Cosenza ◽  
V Niola ◽  
S Savino
Keyword(s):  
Experimental Data ◽  
Vision System ◽  
Control Strategies ◽  
Image Correlation ◽  
Robotic Hand ◽  
Prosthetic Device ◽  
Prosthetic Hands ◽  
Mechanical Hand ◽  
Free Mode ◽  
Mechanical Finger

The development of suitable models for mechanical fingers, whether they are part of prosthetic device or of a robotic hand, is a powerful tool to predict the behaviour of their components since the early stages of design, especially for underactuated mechanisms. Experimental data can improve the reliability of such models and promote their application to build proper control strategies especially for prosthetic hands. Here, we have developed a multi-jointed model of a mechanical finger. The finger is part of the Federica hand: an underactuated mechanical hand that was conceived for prosthetic purpose. The model accounts for friction phenomena in the finger and it is tuned with experimental data acquired through a digital image correlation device. The model allowed us to write kinematics relations of the phalanges and evaluate finger configurations in relation to the closure velocity. Moreover, it was possible to estimate the tendon force and the work analysis occurring during the closure tasks, both in free mode and in presence of objects.

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