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Добірка наукової літератури з теми "Mechanical actuators"

Автор: Grafiati

Опубліковано: 10 березня 2023

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Статті в журналах з теми "Mechanical actuators"

1

Bazghaleh, Mohsen, Steven Grainger, and Morteza Mohammadzaheri. "A review of charge methods for driving piezoelectric actuators." Journal of Intelligent Material Systems and Structures 29, no. 10 (2017): 2096–104. http://dx.doi.org/10.1177/1045389x17733330.

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Piezoelectric actuators are the most commonly used actuators in nanopositioning. They provide excellent operating bandwidth and precision. These actuators are normally driven by voltage amplifiers; however, the relationship of the applied voltage on the actuator and its position is nonlinear and complex due to phenomena such as hysteresis. This adversely influences actuator’s position control which is the core component of nanopositioning. However, the electrical charge applied on a piezoelectric actuator has a significantly less complex relationship with its position. As a result, driving pie

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2

Copaci, Dorin, Dolores Blanco, and Luis E. Moreno. "Flexible Shape-Memory Alloy-Based Actuator: Mechanical Design Optimization According to Application." Actuators 8, no. 3 (2019): 63. http://dx.doi.org/10.3390/act8030063.

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New robotic applications, among others, in medical and related fields, have in recent years boosted research in the development of new actuators in the search for solutions that are lighter and more flexible than conventional actuators. Shape-Memory Alloy (SMA)-based actuators present characteristics that make them an excellent alternative in a wide variety of applications. This paper presents the design, tests (with the control description) and analysis of various configurations of actuators based on SMA wires: flexible SMA actuators, different mechanical design to multiply the displacement a

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3

Zhou, Ling, Xue Jin Shen, Zhen Lu Wang, and Yi Hu. "Performance Comparison of Typical Electrothermal Actuators." Key Engineering Materials 562-565 (July 2013): 528–33. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.528.

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As the power producer, the micro actuator is an important part of the micro electro- mechanical system, which is used as the conversion of energy, motion and force producing. In this paper, the mechanical models of three bent beam electrothermal actuators are summarized to make comparison with each other and analyze mechanical performance. For Π-shaped actuators, the tip displacements are proportional to temperature increment and length, having no relationship with the beam width and thickness. However, the displacement of Π-shaped actuators is smaller than the one of V-shaped actuators with t

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4

Massey, K. C., J. McMichael, T. Warnock, and F. Hay. "Development of mechanical guidance actuators for a supersonic projectile." Aeronautical Journal 112, no. 1130 (2008): 181–95. http://dx.doi.org/10.1017/s0001924000002128.

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Abstract In this paper, the results of a series of experiments funded by DARPA to determine the feasibility of using small actuators to provide directional control for a supersonic projectile are presented. Controlling the flight of the projectile was accomplished by taking advantage of complex shock-boundary-layer interactions produced by mechanical devices. Experimental tests were conducted at GTRI to screen several control concepts and actuator locations. Further experiments were conducted on a scale projectile in a supersonic stream to investigate the rise time of the forces. Several diffe

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5

Zhang, Yu Fang. "Review of Mechanical Structure of Force Actuator for Optical Astronomical Telescope." Advanced Materials Research 765-767 (September 2013): 25–28. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.25.

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Reviewed the application of force actuators in the optical astronomical telescopes, and introduced the working principle, mechanical structure, performance requirements and basic components of the force actuators; then compared the advantages and disadvantages of force actuator types which commonly used in astronomical telescopes, finally, propose a outlook of the development trend of the actuator on the great telescope application requirements.

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6

Gallo, Carlos Alberto, Fernando Lessa Tofoli, Domingos Alves Rade, and Valder Steffen. "Piezoelectric actuators applied to neutralize mechanical vibrations." Journal of Vibration and Control 18, no. 11 (2011): 1650–60. http://dx.doi.org/10.1177/1077546311422549.

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Piezoelectric actuators are widely used in smart structural systems to actively control vibration and noise, and to enhance performance. Because of the highly capacitive nature of these actuators, special power amplifiers, capable of delivering high currents, are required to drive these systems. In this paper, a study to reduce the reactive energy that is necessary in such systems is carried out. This is accomplished by associating the actuator with its capacitive characteristic circuit. Also, non-idealities of the circuit performance are addressed, along with theoretical limits regarding poss

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7

Liu, Yonggang, Aoke Zeng, Shuliang Zhang, Ruixiang Ma, and Zhe Du. "An Experimental Investigation on Polarization Process of a PZT-52 Tube Actuator with Interdigitated Electrodes." Micromachines 13, no. 10 (2022): 1760. http://dx.doi.org/10.3390/mi13101760.

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The manipulator is the key component of the micromanipulator. Using the axial expansion and contraction properties, the piezoelectric tube can drive the manipulator to achieve micro-motion positioning. It is widely used in scanning probe microscopy, fiber stretching and beam scanning. The piezoceramic tube actuator used to have continuous electrodes inside and outside. It is polarized along the radial direction. There are relatively high polarization voltages, but poor axial mechanical properties. A new tubular actuator is presented in this paper by combining interdigitated electrodes and piez

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8

Sardesai, Aditya N., Xavier M. Segel, Matthew N. Baumholtz, et al. "Design and Characterization of Edible Soft Robotic Candy Actuators." MRS Advances 3, no. 50 (2018): 3003–9. http://dx.doi.org/10.1557/adv.2018.557.

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ABSTRACTOne of the goals of soft robotics is the ability to interface with the human body. Traditionally, silicone materials have dominated the field of soft robotics. In order to shift to materials that are more compatible with the body, developments will have to be made into biodegradable and biocompatible soft robots. This investigation focused on developing gummy actuators which are biodegradable, edible, and tasty. Creating biodegradable and edible actuators can be both sold as an interactive candy product and also inform the design of implantable soft robotic devices. First, commercially

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9

Wiegand, Roland, Bastian Schmitz, Christian Pylatiuk, and Stefan Schulz. "Mechanical Performance of Actuators in an Active Orthosis for the Upper Extremities." Journal of Robotics 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/650415.

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The aim of the project OrthoJacket is to develop a lightweight, portable, and active orthosis for the upper limps. The system consists of two special designed fluidic actuators which are used for supporting the elbow function and the internal rotation of the shoulder. A new design of flexible fluid actuator (FFA) is presented that enables more design options of attaching parts, as it is allowed by conventional actuators with a stationary centre of rotation. This advantage and the inherent flexibility and the low weight of this kind of actuator predestined them for the use in exoskeletons, orth

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10

Li, Chong, Robert N. Dean, and George T. Flowers. "Nonlinear Observability Analysis of Micro-machined Electrostatic Actuators Using Self-Sensing." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, DPC (2016): 001632–62. http://dx.doi.org/10.4071/2016dpc-wp36.

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Micro-machined electrostatic actuators (MEA) like parallel plate actuators (PPAs) and comb drive actuators (GCAs) are commonly used in many applications, including gyroscopes, resonators and RF switches. The detection of an actuators' mechanical motion is desired when they are combined with feedback control techniques, especially when the application requires high performance or is affected by disturbances. The motion can be detected by a variety of sensing techniques, including capacitive, piezoresistive and optical. Electrostatic parallel plate actuators can be modeled as a type of variable

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