Micromachined Shape-Memory-Alloy Microactuators and Their Application in Biomedical Devices

Zainal, Mohammad Amri; Sahlan, Shafishuhaza; Ali, Mohamed Sultan Mohamed

doi:10.3390/mi6070879

Cited by 66 publications

(22 citation statements)

References 127 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The other performance related advantages of SMPs come from their biocompatibility, implantable structure and tunable actuation using the glass transition temperature [62]. The super-coiled nylon based SMP actuators have a very encouraging performance when they are used in filament state.…”

Section: Operation Range Of Smpsmentioning

confidence: 99%

“…It is not uncommon to have SMAs as actuators in aerospace applications for shape-morphing of aero-foils [64] or for the simplification and compactness of UAV actuation [65]. The super-elasticity and shape memory property of SMAs also make them an excellent actuator choice for biomedical applications [62]. Although being not a conventional mechanical application, SMAs can also be used in small-scale thermal engines and pumps [56].…”

Section: Modality Of Operationmentioning

confidence: 99%

See 1 more Smart Citation

An Overview of Novel Actuators for Soft Robotics

2018

View full text Add to dashboard Cite

In this systematic survey, an overview of non-conventional actuators particularly used in soft-robotics is presented. The review is performed by using well-defined performance criteria with a direction to identify the exemplary and potential applications. In addition to this, initial guidelines to compare the performance and applicability of these novel actuators are provided. The meta-analysis is restricted to five main types of actuators: shape memory alloys (SMAs), fluidic elastomer actuators (FEAs), shape morphing polymers (SMPs), dielectric electro-activated polymers (DEAPs), and magnetic/electro-magnetic actuators (E/MAs). In exploring and comparing the capabilities of these actuators, the focus was on eight different aspects: compliance, topology-geometry, scalability-complexity, energy efficiency, operation range, modality, controllability, and technological readiness level (TRL). The overview presented here provides a state-of-the-art summary of the advancements and can help researchers to select the most convenient soft actuators using the comprehensive comparison of the suggested quantitative and qualitative criteria.

show abstract

Section: Operation Range Of Smpsmentioning

confidence: 99%

Section: Modality Of Operationmentioning

confidence: 99%

An Overview of Novel Actuators for Soft Robotics

2018

View full text Add to dashboard Cite

show abstract

“…With the growth of semiconductor and precision manufacturing industries, the positioning accuracy of micro/nano scale is highly required [1][2][3][4]. Because of the advantages of fast frequency response, high stiffness and displacement resolution, piezoelectric actuators (PEAs) based on inverse piezoelectric effect have gradually become one of the most widely used smart material actuators.…”

Section: Introductionmentioning

confidence: 99%

Research on Asymmetric Hysteresis Modeling and Compensation of Piezoelectric Actuators with PMPI Model

Wang

Chen

et al. 2020

Micromachines

View full text Add to dashboard Cite

Because of fast frequency response, high stiffness, and displacement resolution, the piezoelectric actuators (PEAs) are widely used in micro/nano driving field. However, the hysteresis nonlinearity behavior of the PEAs affects seriously the further improvement of manufacturing accuracy. In this paper, we focus on the modeling of asymmetric hysteresis behavior and compensation of PEAs. First, a polynomial-modified Prandtl–Ishlinskii (PMPI) model is proposed for the asymmetric hysteresis behavior. Compared with classical Prandtl–Ishlinskii (PI) model, the PMPI model can be used to describe both symmetric and asymmetric hysteresis. Then, the congruency property of PMPI model is analyzed and verified. Next, based on the PMPI model, the inverse model (I-M) compensator is designed for hysteresis compensation. The stability of the I-M compensator is analyzed. Finally, the simulation and experiment are carried out to verify the accuracy of the PMPI model and the I-M compensator. The results implied that the PMPI model can effectively describe the asymmetric hysteresis, and the I-M compensator can well suppress the hysteresis characteristics of PEAs.

show abstract

“…Ni-Ti based shape memory alloys (SMA) are one such difficult-to-machine material with applications in numerous fields (automobile actuators, biomedical, aerospace, micro-electromechancial systems, etc.) [12,13]. These alloys possess the unique properties of pseudo-elasticity, bio-compatibility, corrosion resistance and shape memory effect.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Micro-Electrical Discharge Machining of Nickel-Titanium Shape Memory Alloy Using Grey Relations Coupled with Principal Component Analysis

Abidi

Al-Ahmari

Siddiquee

et al. 2017

Metals

View full text Add to dashboard Cite

Shape memory alloys (SMAs) are advanced engineering materials which possess shape memory effects and super-elastic properties. Their high strength, high wear-resistance, pseudo plasticity, etc., makes the machining of Ni-Ti based SMAs difficult using traditional techniques. Among all non-conventional processes, micro-electric discharge machining (micro-EDM) is considered one of the leading processes for micro-machining, owing to its high aspect ratio and capability to machine hard-to-cut materials with good surface finish.The selection of the most appropriate input parameter combination to provide the optimum values for various responses is very important in micro-EDM. This article demonstrates the methodology for optimizing multiple quality characteristics (overcut, taper angle and surface roughness) to enhance the quality of micro-holes in Ni-Ti based alloy, using the Grey-Taguchi method. A Taguchi-based grey relational analysis coupled with principal component analysis (Grey-PCA) methodology was implemented to investigate the effect of three important micro-EDM process parameters, namely capacitance, voltage and electrode material.The analysis of the individual responses established the importance of multi-response optimization. The main effects plots for the micro-EDM parameters and Analysis of Variance (ANOVA) indicate that every parameter does not produce same effect on individual responses, and also that the percent contribution of each parameter to individual response is highly varied. As a result, multi-response optimization was implemented using Grey-PCA. Further, this study revealed that the electrode material had the strongest effect on the multi-response parameter, followed by the voltage and capacitance. The main effects plot for the Grey-PCA shows that the micro-EDM parameters "capacitance" at level-2 (i.e., 475 pF), "discharge voltage" at level-1 (i.e., 80 V) and the "electrode material" Cu provided the best multi-response.

show abstract

Micromachined Shape-Memory-Alloy Microactuators and Their Application in Biomedical Devices

Cited by 66 publications

References 127 publications

An Overview of Novel Actuators for Soft Robotics

An Overview of Novel Actuators for Soft Robotics

Research on Asymmetric Hysteresis Modeling and Compensation of Piezoelectric Actuators with PMPI Model

An Investigation of the Micro-Electrical Discharge Machining of Nickel-Titanium Shape Memory Alloy Using Grey Relations Coupled with Principal Component Analysis

Contact Info

Product

Resources

About