scholarly journals Development of Linear Actuator for Pulsatile Pump

2018 ◽  
Vol 26 (1) ◽  
pp. 218-223
Author(s):  
Iwanori MURAKAMI ◽  
Kensuke KANEKO ◽  
Tetsuta HIGUTI ◽  
Raymond CHI
Keyword(s):  
Linear Actuator ◽  
Pulsatile Pump

scholarly journals Numerical Evaluation of Structural Safety of Linear Actuator for Flap Control of Aircraft Based on Airworthiness Standard

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 104
Author(s):  
Dong-Hyeop Kim ◽  
Young-Cheol Kim ◽  
Sang-Woo Kim
Keyword(s):  
Numerical Analysis ◽  
Analytical Method ◽  
Safety Evaluation ◽  
Experimental Tests ◽  
Structural Safety ◽  
Linear Actuator ◽  
The Finite Element Method ◽  
Margin Of Safety ◽  
Verification Methodology ◽  
The Given

Airworthiness standards of Korea recommend verifying structural safety by experimental tests and analytical methods, owing to the development of analysis technology. In this study, we propose a methodology to verify the structural safety of aircraft components based on airworthiness requirements using an analytical method. The structural safety and fatigue integrity of a linear actuator for flap control of aircraft was evaluated through numerical analysis. The static and fatigue analyses for the given loads obtained from the multibody dynamics analysis were performed using the finite element method. Subsequently, the margin of safety and vulnerable area were acquired and the feasibility of the structural safety evaluation using the analytical method was confirmed. The proposed numerical analysis method in this study can be adopted as an analytical verification methodology for the airworthiness standards of civilian aircraft in Korea.

An Electrostatic Stepper Motor

1996 ◽  
Vol 10 (23n24) ◽  
pp. 2917-2923
Author(s):  
E.C. Partington ◽  
Edward Chun Kay Wong ◽  
W.A. Bullough
Keyword(s):  
Electrorheological Fluid ◽  
Stepper Motor ◽  
Linear Actuator ◽  
Step Width ◽  
Primary Motion

This paper describes a new concept in pulse controlled motor and precision linear actuator techniques. Piezo translators [PZT] employed to provide reciprocating primary motion are connected to a load via a controllable electrorheological fluid [ERF] clutch to form a programmable speed and step-width drive. Ideal considerations are used to quantify the limiting potential of the drive and details are given of its development and progress.

A High Performance Pulsatile Pump for Aortic Flow Experiments in 3-Dimensional Models

2016 ◽  
Vol 7 (2) ◽  
pp. 148-158 ◽  
Author(s):  
Rafeed A. Chaudhury ◽  
Victor Atlasman ◽  
Girish Pathangey ◽  
Nicholas Pracht ◽  
Ronald J. Adrian ◽  
...  
Keyword(s):  
High Performance ◽  
Aortic Flow ◽  
Pulsatile Pump ◽  
3 Dimensional ◽  
Dimensional Models ◽  
Flow Experiments

Automated Part Centering With Impulse Actuation

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
S. J. Furst ◽  
T. A. Dow ◽  
K. Garrard ◽  
A. Sohn
Keyword(s):  
Measurement Uncertainty ◽  
Performance Modeling ◽  
Voice Coil Motor ◽  
Precision Machining ◽  
Linear Actuator ◽  
Design Performance ◽  
Skilled Operator ◽  
Touch Probe

Centering a part on a spindle for precision machining is a tedious, time-consuming task. Currently, a skilled operator must measure the run-out of a part using a displacement gauge, then tap the part into place using a plastic or rubber hammer. This paper describes a method to automatically center a part on a vacuum chuck with initial run-out as large as 2.5 mm. The method involves measuring the magnitude and direction of the radial run-out and then actuating the part until the part and spindle centerlines are within 5 μm of each other. The run-out can be measured with either a touch probe mounted to a machine axis or an electronic gauge. The part is tapped into place with a linear actuator driven by a voice coil motor. This paper includes an analysis of run-out measurement uncertainty as well as the design, performance modeling, and testing of the alignment actuator. This actuator was employed for part realignment and successfully positioned a hemispherical part with an initial run-out of 1–2.5 mm to within 5 μm of the spindle centerline. This capability shows that the run-out of a part manually placed on flat vacuum chuck can be automatically corrected.

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