Results 31 to 40 of about 3,264 (232)
Charge pump controller for grounded piezoelectric actuators used in precise positioning
Electronics Letters, 2011 A charge pump controller adapted for grounded piezoelectric loads is proposed. By transferring charge packets into the piezoelectric actuator step by step, the actuator deforms with much less hysteresis and ultra-high resolution. Compared with voltage drive, the actuator hysteresis is reduced by 71-83- over a frequency range of 0.01-0.1-Hz.
Y.T. Ma, Z.H. Feng, L. Huang, L.S. Zhang
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Micromachines, 2014 Lab-on-a-chip technology is promising for the miniaturization of chemistry, biochemistry, and/or biology researchers looking to exploit the advantages of a microspace. To manipulate fluid on a microchip, on-chip pumps are indispensable.
Yo Tanaka
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Applied SciencesThe conventional hydraulic system of excavators suffers from significant valve throttling losses and inadequate matching between the hydraulic power source and the load, which substantially impact the system’s overall energy consumption and severely ...
Aihuan He +3 more
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Current Tracking Adaptive Control of Brushless DC Motors
International Journal of Adaptive Control and Signal Processing, EarlyView.In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García +3 more
wiley +1 more source
IOP Conference Series: Materials Science and Engineering, 2020 Abstract This paper mainly focuses on the motion control of a novel direct-drive pump-controlled clutch-actuator system. The RBF neural network and iterative learning control method are combined to perform fast and accurate position tracking for dynamic nonlinear systems with high uncertainty. And the simulink and AMEsim co-simulation is
Jieyu Wang, Bingzhao Gao, Hong Chen
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
Enhanced Operation Mode Design and Motion Control of a Dual-Redundancy Electro-Hydrostatic Actuator
ActuatorsIn dual-redundancy electro-hydrostatic actuators (EHAs), the dual pumps are mainly designed for safety, where the cylinder is controlled mainly by one pump while the other one is standby for redundancy. However, such a strategy is basically like a single-
Huatao Jin +5 more
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A throttle-less single-rod hydraulic cylinder positioning system: Design and experimental evaluation
Advances in Mechanical Engineering, 2015 Modern industrial tote dumpers and lifters are equipped with long-stroke single-rod hydraulic cylinders. For years, valve-controlled cylinders have been used in tote dumpers.
Ehsan Jalayeri +3 more
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A Cartesian Coordinate Robot for Dispensing Fruit Fly Food
Journal of Open Hardware, 2018 The fruit fly, 'Drosophila melanogaster', continues to be one of the most widely used model organisms in biomedical research. Though chosen for its ease of husbandry, maintaining large numbers of stocks of fruit flies, as done by many laboratories, is ...
Matthew T. Wayland, Matthias Landgraf
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Advanced Engineering Materials, EarlyView.Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan +3 more
wiley +1 more source