Temperature compensation design and experiment for a giant magnetostrictive actuator

Zhao, Zhang; Sui, Xiaomei

doi:10.1038/s41598-020-80460-5

Cited by 12 publications

(7 citation statements)

References 15 publications

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“…The experiment shows that the water cooling system can effectively improve the thermal characteristics and uniformity of the magnetostrictive jet dispenser for long-term operation. Zhao et al [ 11 ] proposed a compulsory water cooling control strategy for a giant magnetostrictive actuator’s Terfenol-D constant temperature. The temperature field distribution of the actuator under different input currents and cooling water flow rates was analyzed by the finite element method, and the effectiveness of the temperature control strategy was verified by experiments.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Terfenol-D Rods with Different Structures

Liu

2023

Micromachines

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To reduce the heating of the Terfenol-D rod and evaluate its working efficiency, six kinds of Terfenol-D rods were designed, and the temperature field of the rods was simulated and calculated using the finite element method to obtain the temperature distribution. The results showed that the untreated rod had the highest temperature; the temperature was higher in the middle and lower at both ends; higher on the outer diameter surface; and lower on the inside. When compared to the untreated rod, the temperatures of sliced rods and slit rods decreased, and the temperature of sliced rods was lower than that of slit rods; the temperature of slit rods was higher in the middle and lower at both ends; the temperature distribution of sliced rods was more uniform relatively; the slice treatment rod had the lowest temperature and the best heat suppression effect. Three structural rods were chosen and manufactured from a total of six that were tested. It shows that the temperature of all rods was higher in the middle and lower at both ends after 30 min of operation. The actual temperature of untreated rod was 34 °C, the actual temperature of radially slit rod was 32 °C, and the actual temperature of sliced rod at both ends was 28 °C. The tested temperature distributions of three rods agreed with the calculated ones.

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Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Terfenol-D Rods with Different Structures

Liu

2023

Micromachines

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“…The advantages of MPCs as compared to metalbased magnetostrictive materials are the ability to change dimensions elastically, more exible, lightweight and produce greater saturation magnetostriction with presence of magnetic eld [1], especially at low value of less than 0.5T. PU foam that is incorporated with magnetic particles of carbonyl iron (CIPs), also known as magnetorheological (MR) foam have attracted interest recently due to reduce stiffness [9], low density and high exibility [2] and high sensitivity to magnetic eld [2,10] as compared to other existing MPCs. Besides, nucleation of pores in the matrix phase of MR foam causes a decrease in the resultant Young's modulus, which is in return result the MPC to be more susceptible to elongation [7], thus suitable for magnetostrictive application that require changeable dimensions easily and reversibly.…”

Section: Introductionmentioning

confidence: 99%

Correlation Between Temperature Changes and Magnetostrictions in Magnetorheological Foam

Senin

Nordin

Mazlan

et al. 2023

Preprint

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Magnetorheological (MR) foam has been identified as a potential magnetostrictive material due to high flexibility and rapid responsiveness towards applied magnetic fields. However, to date, the effect of MR foam at different temperatures has not yet been discovered. Since most devices have tendency to experience raise in temperature during operating system, this might affect characteristics and magnetostriction performance of magnetostrictive material. Therefore, this study aimed to investigate the effect of temperatures between 25 to 50oC on magnetostriction of MR foam, at magnetic fields ranging from 0 to 0.7T. Two samples were prepared which were PU foam and MR foam. During off-state (0T), both samples has reduced in dimension, by about 0.03–0.04% at increasing temperatures from 25 to 35oC. Then, both samples experienced expansion in dimensions at temperatures between 35 to 50oC, by 0.06% and 0.04% for PU and MR foams, respectively. Meanwhile, at on-state (0.1 to 0.7T), similar trends were observed in which the transition from decreased to increase in magnetostrictions occurred at 35oC. The phenomenon is due to the soft-segment and hard-segment in the polymer matrix that have been affected, within the temperature ranges of 25-35oC and 35-50oC respectively, which caused the negative and positive magnetostrictions of both samples.

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“…Water having a high specific heat capacity [4] can extract heat from the TCPFL muscles at a fast pace. It has been used in other applications to optimize the actuation of artificial muscles including shape memory alloys (SMA) [5], [6], giant magnetostrictive materials (GMMs) [7], and liquid crystal elastomers (LCEs) [8]. Similar methods have been discussed with a robotic finger attached to TCPFL muscles in previous work by Wu, L. et al [9] where the TCPFL muscles were actuated with the help of hot and cold water.…”

Section: Introductionmentioning

confidence: 99%

Twisted and coiled polymer muscle actuated soft 3D printed robotic hand with Peltier cooler for drug delivery in medical management

et al. 2022

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Many robotic hands have been proposed to have unique designs and capabilities, focusing on sensing, actuation, and control. This paper presents experimental studies on a soft 3D-printed robotic hand whose fingers are actuated by twisted and coiled polymer (TCPFL) muscles, driven by resistive heating, and cooled by water and Peltier mechanism (thermoelectric cooling) for increasing the actuation frequency. The hand can be utilized for pick and place applications of drugs in clinical settings, which may be repetitive for humans. A combination of ABS plastic and thermoplastic polyurethane material is used to additively manufacture the robotic hand. The hand along with a housing tank for the muscles and Peltier coolers has a length of 380 mm and weighs 560 gm. The fabrication process of the TCPFL actuators coiled with 160 µm diameter nichrome wires is presented. The actuation frequency in the air for TCPFL is around 0.01 Hz. This study shows the effect of water and Peltier cooling on improving the actuation frequency of the muscles to 0.056 Hz. Experiments have been performed with a flex sensor integrated at the back of each finger to calculate its bend-extent while being actuated by the TCPFL muscles. All these experiments are also used to optimize the TCPFL actuation. Overall, a low-cost and lightweight 3D printed robotic hand is presented in this paper, which significantly increases the actuation performance with the help of cooling methods, that can be used in applications in medical management.

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Temperature compensation design and experiment for a giant magnetostrictive actuator

Cited by 12 publications

References 15 publications

Thermal Analysis of Terfenol-D Rods with Different Structures

Thermal Analysis of Terfenol-D Rods with Different Structures

Correlation Between Temperature Changes and Magnetostrictions in Magnetorheological Foam

Twisted and coiled polymer muscle actuated soft 3D printed robotic hand with Peltier cooler for drug delivery in medical management

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