Investigation of the Influence of Structural and Adjusting Parameters of a Quadruple-Orifices Electrohydraulic Amplifier on the Static Characteristics of Rocket Pack Steering Actuator

2019 ◽  
pp. 32-40
Author(s):  
O.B. Belonogov
Keyword(s):  
Static Analysis ◽  
Dimensionless Parameter ◽  
Slope Angle ◽  
Static Stability ◽  
Gain Factor ◽  
Gear Pump ◽  
Static Characteristics ◽  
Rectangular Shape ◽  
Output Characteristics ◽  
Speed Characteristic

The article considered the results of researches of influence of constructional and adjusting parameters of the quadruple-orifices electrohydraulic amplifier on static characteristics of the steering actuator of the rocket pack. The studies are carried out using static analysis methods, including methods for calculating the static characteristics of an autonomous single-stage steering actuator with a quadruple-orifices electrohydraulic amplifier with negative overlapping of throttling windows of rectangular shape by spool plungers. As a result of research it is shown that the steering actuator does not have static stability. It is shown that the slope of the speed characteristic of the steering actuator is exerted by the dimensionless parameter of the local thickness of the incoming liner wall (the driven axis of the three-gear pump). Consequently, with the help of the variation of this parameter, it is possible to adjust the slope angle of the speed characteristic of the steering actuator, i.e., its gain factor. The design solutions of the steering actuator are proposed, which allow improving their output characteristics and facilitating adjustment.

scholarly journals Modeling and Simulation of Special Shaped SOI Materials for the Nanodevices Implementation

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Cristian Ravariu ◽  
Florin Babarada
Keyword(s):  
Film Thickness ◽  
Modeling And Simulation ◽  
Electronic Devices ◽  
Main Stage ◽  
Static Characteristics ◽  
Rectangular Shape ◽  
Fixed Charges ◽  
Industrial Chain ◽  
Output Characteristics ◽  
Vacuum Cavity

In the industrial chain of the nanomaterials for electronic devices, a main stage is represented by the wafer characterization. This paper is starting from a standard SOI wafer with 200 nm film thickness and is proposing two directions for the SOI materials miniaturization, indexing the static characteristics by simulation. The first SOI nanomaterial is a sub-10 nm Si-film with a rectangular shape. The influence of the buried interface fixed charges has to be approached by the distribution theory. The second proposal studies the influence of the vacuum cavity in a “U” shaped SOI nanofilm. In all cases, with rectangular or “U” shape film, the simulations reveal transfer characteristics with a maximum and output characteristics with a minimum for sub-10 nm thickness of the SOI film.

Analysis on Static Characteristics of Flipping Horizontal Machining Center

2014 ◽  
Vol 716-717 ◽  
pp. 577-581
Author(s):  
Rui Shao ◽  
Ding Wen Yu ◽  
Ping Fa Feng ◽  
Hui Shu Jia
Keyword(s):  
Static Analysis ◽  
Ball Screw ◽  
Electronic Document ◽  
Static Characteristics ◽  
Machining Performance ◽  
Machining Center ◽  
Interface Modeling

The worktable and the mainframe of the flipping horizontal machining center can be separated. The performance of the mainframe largely determines the machining performance of the whole machine. The deformation of mainframe under the application of certain forces demonstrates its static characteristics, which helps to find the vulnerable points for improvements. This paper mainly discusses the modeling of ball screw interfaces by taking into account the interface modeling. Static analysis is made by using Workbench to provide guidance for structural improvements.This electronic document is a “live” template and already defines the components of your paper [title, text, heads, etc.] in its style sheet.

The Static Analysis of the Parallel Bars of the Crankshaft of a Mini Air Compressor on ANSYS

2013 ◽  
Vol 397-400 ◽  
pp. 344-354
Author(s):  
Yao Bing Wei ◽  
Zhen Zhen Qu
Keyword(s):  
Static Analysis ◽  
Mechanical Model ◽  
Working Condition ◽  
Stress And Strain ◽  
Reciprocating Compressor ◽  
Static Characteristics ◽  
Connecting Rod ◽  
Air Compressor

Mechanical model of crankshaft and connecting rod mechanism of reciprocating compressor was built. Then the order of stress was obtained every ten degrees while crankshaft turning. The larger stress of crankshaft initial turnings was utilized to calculate the whole model and the unreliable region and destructive working condition then was determined. The situation was simulated with ANALYS and the static characteristics, i.e. stress and strain, of the crankshaft was also obtained. The simulated results testify the analysis and the results of the paper have great value for reference when designing crankshafts.

Application of the Nanocrystalline Alloy in Lubrication Oil Pressure-Measuring for Auto Engines

2013 ◽  
Vol 661 ◽  
pp. 7-10 ◽  
Author(s):  
Yan Ping Shi ◽  
Shu Hua Fan
Keyword(s):  
High Temperatures ◽  
Pressure Sensor ◽  
Simple Structure ◽  
Nanocrystalline Alloy ◽  
Measuring Method ◽  
Static Characteristics ◽  
Output Frequency ◽  
Lubrication Oil ◽  
Output Characteristics ◽  
Excitation Circuit

A novel measuring method based on Fe-based nanocrystalline alloy was studied to achieve accurate measurement of the lubrication oil pressure of auto engines. A magnetoelastic inductance pressure sensor was designed. Its operating principle, structure, output characteristics, and major parameters were discussed. The static characteristics of the sensor as well as its temperature, excitation circuit intensity, and influence on output frequency were analyzed through an experiment. Results show that the sensor is stable and reliable at high temperatures, and it has a simple structure. It can efficiently measure the lubrication oil pressure of auto engines.

scholarly journals Static Analysis of the Tubular Electromagnetic Linear Actuator with Permanents Magnets

2018 ◽  
Vol 213 (2) ◽  
pp. 83-95 ◽  
Author(s):  
Krzysztof Just ◽  
Paweł Piskur
Keyword(s):  
Finite Element Method ◽  
Static Analysis ◽  
Preliminary Analysis ◽  
Magnetic Circuit ◽  
Electromagnetic Actuator ◽  
Linear Actuator ◽  
Static Characteristics ◽  
Soft Ferromagnetic ◽  
Ferro Magnetic ◽  
Electromagnetic Linear Actuator

Abstract In this paper a results of a static analysis of the tubular linear electromagnetic actuator is presented. The linear actuator consist of two parts: a cylindrical unmovable coils surrounded by a soft ferromagnetic case, and a runner made from sequence of permanent magnet with a soft ferro-magnetic gasket. In the first part of the paper the analytical method was performed for preliminary analysis. In the second part of the paper the more detailed analysis was depicted with using finite element method (FEM). The magnetic circuit shape and impact of selected dimensions on static characteristics is presented. Then the axial and radial electromagnetic force as a function of the runner dimensions were analysed.

On the Static Stability Analysis of Viscoelastic Perfect Columns

1985 ◽  
Vol 9 (3) ◽  
pp. 157-164
Author(s):  
W. Szyszkowski ◽  
P.G. Glockner
Keyword(s):  
Stability Analysis ◽  
Static Analysis ◽  
Element Model ◽  
Static Stability ◽  
Model Material ◽  
Zero Eigenvalue ◽  
Equilibrium Configurations ◽  
Static Approach ◽  
Elastic Column ◽  
New Interpretation

In this article the direct static equilibrium approach for stability analysis is used to study the behaviour of a perfect column made of a linear three-element model material and subjected to a concentric load. The study confirms that such a traditional static analysis admits only one non-zero eigenvalue, namely the load a the instant of application, referred to as the Euler load, PE, for the corresponding elastic column. A new interpretation of adjacent equilibrium configurations for viscoelastic structures is introduced which permits an ‘exact’ static analysis of the problem. The results from this analysis agree, in part, with those obtained from a general dynamic stability analysts. They help to clear up some misinterpretations resulting from the application of the static approach and show that time, being inherently an asymmetric parameter, generates effects typical of asymmetric influences and decreases the critical load of the structure.

scholarly journals Static and Dynamic Analysis of a Pump Impeller with a Balancing Device Part I: Static Analysis

2014 ◽  
Vol 19 (3) ◽  
pp. 609-619
Author(s):  
C. Kundera ◽  
V.A. Martsinkovsky
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Performance Parameters ◽  
Static Characteristics ◽  
Pump Impeller ◽  
Static And Dynamic Analysis ◽  
Numerical Example ◽  
Basic Performance ◽  
Simplifying Assumptions ◽  
Impeller Geometry

Abstract This part of the work presents the design and static analysis of an impeller for a single-stage pump. The impeller is directly connected with a balancing device. The impeller needs to have a properly designed system of longitudinal and lateral clearances on both sides. With the simplifying assumptions concerning the flow and distribution of pressure in the longitudinal and lateral clearances, the static analysis involved deriving relationships between the impeller geometry and the basic performance parameters of the pump. A numerical example was used to show the calculation procedure of static characteristics for the predetermined parameters

FEA and Contrast Test of Slender Shaft Turning

2014 ◽  
Vol 889-890 ◽  
pp. 140-143
Author(s):  
Tie Ling Wang ◽  
Zhao Xia Xi
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Natural Frequency ◽  
Static Analysis ◽  
Cutting Forces ◽  
Cutting Parameters ◽  
Technological Scheme ◽  
Static Characteristics ◽  
Turning Process ◽  
Shaft Deformation

Aanalyzed the finite element static characteristics of the slender shaft deformation under the influence of cutting forces with different clamping ways in turning process by Pro/ENGINEER and Pro/MECHANICA software . Also analyzed the influence of clamping ways on the natural frequency of the slender shaft modal characteristics. The result indicates that the static analysis can be applied to the prediction of processing deformation with different clamping ways, the modal analysis can be applied to the calculation of the slender shaft natural frequency with different clamping ways. Can get a basic for reducing machining deformation and vibration, selecting cutting parameters, drawing up technological scheme reasonably.

An Efficient Procedure of Static Analysis of Long Ocean Mining Pipe

1984 ◽  
Vol 106 (3) ◽  
pp. 329-335 ◽  
Author(s):  
V. S. Tikhonov ◽  
A. S. Fisher ◽  
V. K. Zubarev
Keyword(s):  
Differential Equations ◽  
Static Analysis ◽  
Asymptotic Theory ◽  
Asymptotic Methods ◽  
Singularly Perturbed ◽  
Static Characteristics ◽  
Motion Modeling ◽  
Efficient Procedure ◽  
Method Of Solution ◽  
Ocean Mining

The paper develops an efficiency numerical algorithm for calculation of static characteristics of a long ocean mining pipe hanging from the ship. The algorithm is based on an asymptotic theory of ordinary differential equations, namely, on Tupchiev’s method of solution of singularly perturbed boundary-value problems. The developed algorithm is shown to be fairly universal, providing fast and highly accurate computation. Prospects of asymptotic methods for long ocean pipe motion modeling are noted. Examples are given of a pipe static analysis confirming an efficiency of the developed procedure.

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