Design and characterization of MEMS thermal actuator

Suma, N; Nagaraja, Veda Sandeep; Pinjare, S. L.; Neethu, K N; Sudharshan, K M

doi:10.1109/icdcsyst.2012.6188649

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The ever-increasing interest in miniaturized mechanical devices − requires novel materials for actuators − with micrometer to millimeter size. The currently used actuators include piezoelectric, magnetostrictive, and electromagnetic materials.…”

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confidence: 99%

Direct Quantification of Rapid and Efficient Single-Stroke Actuation by a Martensitic Transition in a Thermosalient Crystal

2019

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Molecular dynamic crystals conveniently combine flexibility required for mechanical reconfiguration, strength for effective translation of elastic energy, and long-range order of mechanically coupled molecules for rapid conversion of disordered motion (heat) or photons (light) into ordered motion (work). By direct measurement of the actuation force generated by crystals of a thermosalient solid, here we describe the first direct quantification of the work performed and energy conversion that can be accomplished by using dynamic crystals as supramolecular actuators. Upon reversible α-to-γ phase transition, crystals of (phenylazophenyl)palladium hexafluoroacetylacetonate of submillimeter to millimeter size exert forces in the range of 1–100 mN upon longitudinal and lateral expansion. This work translates to a volumetric power density of about 1–3 MW m–3 and efficiency comparable to the existing multicomponent actuators.

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confidence: 99%

Direct Quantification of Rapid and Efficient Single-Stroke Actuation by a Martensitic Transition in a Thermosalient Crystal

2019

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“…For this purpose we performed electro-thermomechanical simulations in order to obtain the temperature and displacement values during the actuation (FIGURES [3][4][5]. The boundary conditions of the simulations used for experimental thermal actuator were the following: the initial temperature of the whole structure and the temperature of the environment were considered to be T 0 =20 o C and the air convection coefficient was set to 20 W/m 2 K. The material properties settings for the Aluminum were assumed to be: the Young's modulus of 77 GPa, the Poisson's ratio of 0.3, the thermal coefficient of expansion of 2.3×10 -5 K -1 and the thermal conductivity depends on the temperature values [16].…”

Section: Figure 2 the Effects Of The Thermal Expansionmentioning

confidence: 99%

“…Magnetic actuation uses Lorentz Force Equation or the theory of magnetism to convert an electrical signal (current) into a mechanical output (displacement). This kind of actuators requires special conditions for fabrication [4][5][6][7][8]. Piezoelectric actuators have the capability to convert an electrical energy into mechanical energy or vice versa and they don't have moving parts like thermal or other types of actuators.…”

Section: Introductionmentioning

confidence: 99%