High displacement piezoelectric actuators: characterization at high load with controlled end conditions

Mulling, James; Usher, Timothy; Dessent, B.; Palmer, Jeremy C.; Franzon, Paul D.; Grant, E.; Kingon, Angus I.

doi:10.1109/isaf.2000.942427

Cited by 4 publications

(2 citation statements)

References 4 publications

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“… 26 The primary method of infection for many sole abscesses and DIPJ sepsis is incursion of bacteria and foreign debris from the environment through hoof wall defects into the underlying lamina and soft tissues. 27 Antimicrobial resistance was common among study isolates within the Enterobacterales order. Previous work evaluating antimicrobial resistance among 5793 fecal samples taken from 173 cow‐calf operations from regions across the United States found 16.6% of E. coli had some degree of antimicrobial resistance, and 5.3% had MDR, which is comparable to our results.…”

Section: Discussionmentioning

confidence: 98%

Bacterial culture and susceptibility of samples taken from septic foot lesions of adult beef cattle

Walker

Middleton

Gull

et al. 2023

Veterinary Internal Medicne

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Background Lameness is an economically important and common disease of cattle, and foot disease is the most common cause of lameness in cattle. Limited data is available regarding lameness in cow‐calf operations. Objectives Describe the bacteria most commonly isolated from septic lesions of the feet of adult beef cattle and the antimicrobial susceptibility patterns of the isolated bacteria. Animals Fifty‐four adult cattle from cow‐calf operations and diagnosed with a sole abscess or distal interphalangeal joint sepsis were enrolled. Methods Prospective observational study. Abscess fluid from a convenience sample of clinical cases was cultured. Isolated bacteria were identified using matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOF) mass spectrometry or 16s rRNA gene sequencing. Antimicrobial susceptibility profiling was performed on isolates when a bacterial species was identified from ≥5 samples. Results Fifty of the 54 samples were polymicrobial. Trueperella pyogenes (22/54), Streptococcus uberis (16/54), and Bacteroides pyogenes (14/54) were the most commonly isolated bacteria. Eighty‐one of 96 tested isolates were resistant to at least 1 antimicrobial; multidrug resistance was identified in 37/96 isolates. Oxytetracycline (50/96), tylosin (40/96), and florfenicol (37/96) resistance was commonly identified. Resistance to ceftiofur (5/96) was rare. Conclusions and Clinical Importance Septic processes of the foot in these adult beef cattle frequently were polymicrobial. Most of the isolated bacteria were resistant to at least 1 antimicrobial with over one‐third being multidrug resistant. Although simple sole abscesses do not require antimicrobial treatment, deep septic processes of the foot often are treated with antimicrobials. Culture and susceptibility of deep septic lesions may guide judicious antimicrobial usage.

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Section: Discussionmentioning

confidence: 98%

Bacterial culture and susceptibility of samples taken from septic foot lesions of adult beef cattle

Walker

Middleton

Gull

et al. 2023

Veterinary Internal Medicne

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“…These actuators provide several advantages in terms of faster response, high positioning accuracy, no backlash or static friction thus low wear and tear, and compact design. They require less actuation power and do not create any stray magnetic fields [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Bond Graph Modeling and Simulation of Hybrid Piezo-Flexural-Hydraulic Actuator

Kelkar,

Santhya,

Kanchan

et al. 2024

RAiSE-2023

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The design, fabrication, and characterization of millimeter scale motors for miniature direct drive robots

Palmer

Mulling

Dessent

et al. 2004

IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004

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Absrroct -This paper reports on research into miniature, direct drive, high force/torque motors to support insect-sized mobile robotic platforms. The primary focus is on scalable motors based on piezoelectric transducers. The contributions of this work include:(1.) the design, analysis, and characterization of a miniature mode conversion rotary ultrasonic motor based on a piezoelectric stack transducer; this produced a static torque density of 037 Nrnkg, (2.) a millimeter scale Linear piezomotor, constructed with a parallel arrangement of annular stressed unimorph piezoelectric transducers and passive latches, exhibited 0.23 N of blocked force, and (3.) Simulation data is presented that compares these motor concepts to commercial systems in the context of scalability. Results suggest that smaller versions of the rotary ultrasonic motor would possess a static torque density seven times that of a commercial 3-mm electromagnetic system. This technology shows promise for driving the platform.

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High displacement piezoelectric actuators: characterization at high load with controlled end conditions

Cited by 4 publications

References 4 publications

Bacterial culture and susceptibility of samples taken from septic foot lesions of adult beef cattle

Bacterial culture and susceptibility of samples taken from septic foot lesions of adult beef cattle

Bond Graph Modeling and Simulation of Hybrid Piezo-Flexural-Hydraulic Actuator

The design, fabrication, and characterization of millimeter scale motors for miniature direct drive robots

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