11/5/2023 0 Comments Piezo actuator amplitude![]() They compared the mode shapes and obtained the resonance frequencies in non-viscous liquid by the simulation software. They analysed the effect of density and various concentrations of water-glycerol mixture on vibrations of cantilever in these environments. Vázquez et al. studied application of AFMs in chemical and biological fields. In AFM, when the rate and quality of imaging are relative to microcantilever vibration, then investigation of frequency and amplitude of vibration is of great importance. Study of its dynamic behaviour (especially in fluid for specific condition) and prediction of its behaviour is completely necessary. Faster operation, increased accuracy, possibility of downsizing and utilizing multiple parallel microcantilever led to the idea of microcantilever with piezoelectric layer .Īn application of piezoelectric microcantilever attracting many attentions recently is in energy harvesting fields . The main disadvantage of this kind of AFMs was low speed of sample imaging. The idea of AFMs downsize caused piezoresistive can be used instead of laser light detectors . Laser light is widely used in detection of microcantilever (MC) oscillations . Key words: atomic force microscopes / computational fluid dynamic / fluid–structure interaction / microcantilever / vibrationĪtomic force microscope (AFM) is a tool used for nano-level evaluation, investigation for the structure of materials surface in nanometre scale precision, force measurement between molecules directly in atomic precision and nanometre scale and study of polymeric materials and biomaterials . Simulation results demonstrate the effectiveness of proposed method in reducing vibration and measurement precision in various environments. Transient and frequency response of the AFMs of single-layer and double-layer (parallel and series) piezoelectric are simulated in different conditions, and energy harvesting of this structures is compared to each other. The carried out modelling and simulation are done using the quality ( Q) factor in air and, also simulation in fluid environment is done by real computational fluid dynamic and according to fluid–structure interaction. Since the resonance frequency and amplitude are main parameters in the operation of the microscopes, the simulations will be based on these two parameters. In this paper, a novel simulation method based on finite element method software (ABAQUS) is developed for simulation of oscillatory and sensor behaviour of AFM of the piezoelectric microcantilever type in air and water, with different geometrical arrangements. Using finite element software does not apply any kind of simplifications on the geometric shape and it has less errors (compared to cases occurred in analytical calculations). * e-mail: frequency and amplitude are major issues in the operation of atomic force microscopes (AFMs), since the slightest variation in amplitude and resonance frequency, changes application type of AFM quickly. Robotic Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, The experimental results show that the output speed of the actuator is positively linearly related to the excitation voltage, the maximum output thrust is 8 N when the excitation voltage is 100 V, the excitation frequency is 20.1 kHz, the pre-pressure is 7.5 N, the phase difference of the excitation signal is π/2, and the output speed of the actuator can reach 116 mm/s.Adel Mohammadi *, Moharam Habibnejad Korayem and Reza Ghaderi ![]() After optimizing the stator chamfer to 2.5 and 4.5 mm, the tangential amplitude difference of the 15° tuning fork angle actuator is the smallest. The simulation results show that the integrated output performance of the piezoelectric actuator is best when the angle of the tuning fork is 15°. The externally applied conditions (the influence model of excitation voltage, excitation frequency, and pre-pressure) on the performance output of piezoelectric actuators will promote the miniaturization and industrialization of tuning fork piezoelectric actuators in the next step. Aiming at the problems of low output speed, large size, and difficult miniaturization of stacked and sandwich piezoelectric actuators, a patch-type tuning fork piezoelectric actuator model based on the stick-slip effect was designed, in which the dynamic theoretical analysis, the simulation optimization to determine the stator structure parameters, and the experimental research were carried out to obtain the stator structure parameters.
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