Control of strain in a flexible beam using Ni-Ti-Cu shape memory alloy wire actuators

Lima, Walber Medeiros; Araújo, Carlos José de; Valenzuela, Walter Andrés Vermehren; Neto, José Sérgio da Rocha

doi:10.1590/s1678-58782012000500010

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…on analysis and control the strain of flexible aluminum beam under external disturbances [9] . Here strain gauge was used to measure the strain of the beam and SMA wire was used as actuators.…”

Section: Lima Et Al Conducted An Experiments Investigationmentioning

confidence: 99%

Effect of Sensor Location of Smart Composite Plate System on Feedback Control Performance

Abdullah

Gaikwad

Majid

et al. 2019

Electron Sci Technol Appl

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The present study is proposing a deflection control of a fiberglass composite plate system using shape memory alloy (SMA) actuators. The aim of this study is to determine the optimal placement of sensor for the feedback smart composite plate system. Strain measurement on the composite plate was chosen as the input variable for the feedback system. The change in strain on the composite plate was different at all locations on the plate during deflection. Thus, six strain gauges were placed at three positions i.e. tip, mid and root of the plate, at angle 0° and 45° in order to measure the change in strain at these locations and determine which is the best location to produce accurate control of the plate. The performance of the plate using these input variables were compared and analyzed by conducting experiments which required the plate to be deflected using the control system. In order to evaluate the performance of the controller under varying conditions, disturbances were also added to the experiments. The disturbances introduced were similar to those faced by aircraft during flight that is wind flow at varying velocities conducted in the wind tunnel. From the experimental results, it was found that the tip of the plate had the highest change in strain value and the control using input from the strain gauge located there produced the best performance as compared to input from strain gauges located at mid and root of the plate. However, in the presence of airflow, it was found that the best control performance was using feedback from the strain gauge located in the middle of the plate.

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Section: Lima Et Al Conducted An Experiments Investigationmentioning

confidence: 99%

Effect of Sensor Location of Smart Composite Plate System on Feedback Control Performance

Abdullah

Gaikwad

Majid

et al. 2019

Electron Sci Technol Appl

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“…Since then, SMAs have been used in many fields of engineering: robotics [2][3][4][5][6][7], biomedical engineering [8][9][10], and structural engineering [11,12]. The field of innovative robotics seems to be particularly suited to exploiting the advantages that these materials can provide.…”

Section: Introductionmentioning

confidence: 99%

Flexible Fingers Based on Shape Memory Alloy Actuated Modules

Maffiodo

Raparelli

2019

Machines

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To meet the needs of present-day robotics, a family of gripping flexible fingers has been designed. Each of them consists of a number of independent and flexible modules that can be assembled in different configurations. Each module consists of a body with a flexible central rod and three longitudinally positioned shape memory alloy (SMA) wires. When heated by the Joule effect, one to two SMA wires shorten, allowing the module to bend. The return to undeformed conditions is achieved in calm air and is guaranteed by the elastic bias force exerted by the central rod. This article presents the basic concept of the module and a simple mathematical model for the design of the device. Experimental tests were carried out on three prototypes with bodies made of different materials. The results of these tests confirm the need to reduce the antagonistic action of the inactive SMA wires and led to the realization of a fourth prototype equipped with an additional SMA wire-driven locking/unlocking device for these wires. The preliminary results of this last prototype are encouraging.

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“…The functional properties of these smart materials have stimulated interest in using them in very specific areas where there is a requirement for minimal noise, lightness and strength, or mechanical work. Aside from rehabilitation engineering, other fields have benefited from research into SMAs because these materials have potential general applications for position control , shape changes , aerospace , biomedicine , and many other things.…”

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confidence: 99%

Artificial Biometric Finger Driven by Shape‐Memory Alloy Wires

et al. 2013

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This paper presents the design and testing of an artificial finger based partly on biomechanics. The prototype was manufactured in acrylonitrile butadiene styrene plastic using a rapid prototyping three-dimensional printer. The flexing of the finger was realized by Ni-Ti shape-memory alloy (SMA) wires with diameters of 0.3 mm, activated by resistive heating. The results obtained show the new prototype to be superior in performance, mainly in terms of angles of rotation of the phalanges, compared with some SMA fingers discussed in the literature.

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Control of strain in a flexible beam using Ni-Ti-Cu shape memory alloy wire actuators

Cited by 7 publications

References 4 publications

Effect of Sensor Location of Smart Composite Plate System on Feedback Control Performance

Effect of Sensor Location of Smart Composite Plate System on Feedback Control Performance

Flexible Fingers Based on Shape Memory Alloy Actuated Modules

Artificial Biometric Finger Driven by Shape‐Memory Alloy Wires

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