Analyzing Method of Random Vibration Characteristic for Armature System of Hermetically Sealed Electromagnetic Relay

2007 ◽  
Author(s):  
Zhai Guofu ◽  
Chen Yinghua ◽  
Ren Wanbin
Keyword(s):  
Random Vibration ◽  
Vibration Characteristic ◽  
Electromagnetic Relay ◽  
Armature System

A Study and Review of Human Response to Prolonged Random Vibration

1966 ◽  
Vol 8 (6) ◽  
pp. 481-492 ◽  
Author(s):  
Richard J. Hornick ◽  
Norman M. Lefritz
Keyword(s):  
Spectral Density ◽  
High Speed ◽  
Random Vibration ◽  
Human Performance ◽  
Vibration Characteristic ◽  
Human Response ◽  
Human Capabilities ◽  
Power Spectral ◽  
Long Duration ◽  
Low Altitude

This article describes a study conducted to determine the effects of long duration, random vibration—characteristic of low-altitude high-speed (LAHS) flight aircraft—on human performance, physiological, biodynamic, and tolerance responses. Ten subjects experienced 0.10, 0.15, and 0.20 RMS g with a shaped power spectral density from 1 to 12 cps while engaging in LAHS control tasks. Simulation runs were of 5 hours duration, with the centermost 4 hours under dynamic conditions. Results of this experiment are related to those of other studies which had the same general objectives in order to provide a brief review and summary about what is known regarding human capabilities for LAHS flight.

Random Dynamic Fatigue Analysis of Body Structures of Coach

2011 ◽  
Vol 97-98 ◽  
pp. 765-770
Author(s):  
Zhen Qin ◽  
Wen Tao Xu
Keyword(s):  
Random Vibration ◽  
Degrees Of Freedom ◽  
Element Model ◽  
Accurate Method ◽  
Vibration Characteristic ◽  
Body Structure ◽  
Structure Strength ◽  
Design Requirements ◽  
Pseudo Excitation ◽  
The Finite Element Model

In this paper, an efficacious and accurate method for analyzing random vibration and fatigue lifespan of coaches with high degrees of freedom is developed. Based on the design requirements for structure strength and fatigue lifespan of a coach, the finite element model of its body structure was used to investigate the dynamic behavior of the coach running on a randomly uneven road. The vibration characteristic was derived using the pseudo excitation method (PEM). The fatigue lifespan is discussed by means of the Miner rule, and the fatigue resistance is also studied. The reliability of the proposed method is numerically verified.

Evaluation of flight equipment acceleration caused by random vibration loads

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 2001-1758
Author(s):  
Romualdo Ruotolo ◽  
Massimiliano Cotterchio
Keyword(s):  
Random Vibration ◽  
Vibration Loads

CARPENTER 430FR SOLENOID QUALITY

Alloy Digest ◽  
1977 ◽  
Vol 26 (3) ◽  
Keyword(s):  
Stainless Steel ◽  
Electrical Resistivity ◽  
Magnetic Circuit ◽  
Iron Alloy ◽  
Heat Treating ◽  
Solenoid Valve ◽  
Magnetic Flux Density ◽  
Magnetic Components ◽  
Electromagnetic Relay ◽  
Core Components

Abstract Carpenter 430FR Solenoid Quality stainless steel is a ferritic chromium-iron alloy developed especially for A.C. and D.C. magnetic circuit applications such as solenoid valve core components and electromagnetic relay cores. The electrical resistivity of 430FR is approximately 25% higher than other commercially available 430F stainless. Increased electrical resistivity provides better performance of magnetic components, particularly at power frequencies and high magnetic flux density. This datasheet provides information on composition, physical properties, and hardness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-337. Producer or source: Carpenter.

Improving the efficiency of cyclic devices for collecting and processing information in monitoring and vibration diagnostics systems

2017 ◽  
Vol 11 (1) ◽  
pp. 81-94 ◽  
Author(s):  
A. P. Moroz ◽  
T. S. Abbasova ◽  
M. E. Stavrovsky
Keyword(s):  
Random Vibration ◽  
Printed Circuit Boards ◽  
Monitoring Systems ◽  
Circuit Boards ◽  
Vibration Diagnostics ◽  
Printed Circuit ◽  
Impact Processes ◽  
Collection Device ◽  
Processing Information ◽  
Operation Characteristics

Identified the problem of increasing the efficiency of the collection device and the processing of information in telemetry monitoring systems and vibration diagnostics. The possibilities of CAD-programs for the calculation of vibro-impact processes and random vibration devices and printed circuit boards. A study of the frequency and random vibration study on the example of the PCB in SolidWorks environment. Abstract purpose, principle of operation, characteristics of the onboard telemetry information «Pyrite» system for measuring the parameters of aircraft, which are characterized by different phases and the duration of the flight telemetered site; It shows that the «Pyrite» equipment can be effectively used for the integrated telemetry information slowly evolving processes and rapidly changing processes of aircraft.

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