Analog Simulation of a Bilinear Hysteretic System Undergoing Random Vibration

1969 ◽  
Vol 91 (4) ◽  
pp. 1051-1056
Author(s):  
R. N. Brown
Keyword(s):  
Computer Simulation ◽  
Probability Distribution ◽  
Random Vibration ◽  
Analog Computer ◽  
Equivalent Linearization ◽  
Level Crossing ◽  
Analog Simulation ◽  
Physical Behavior ◽  
Hysteretic System ◽  
Level Crossing Rate

An analog computer simulation is used to substantiate an equivalent linearization analysis of a bilinear hysteretic system undergoing random vibration. An interpretation of the physical behavior of the system is presented. Quantities useful in failure prediction—the average level crossing rate and the probability distribution of the displacement—are also measured, and it is shown that the hysteretic system can have a longer life than a linear system based on a low level approximation.

Level crossing rate of Nakagami-m fading signal: Field trials and validation

2000 ◽  
Vol 36 (4) ◽  
pp. 355 ◽  
Author(s):  
M.D. Yacoub ◽  
M.V. Barbin ◽  
M.S. de Castro ◽  
J.E. Vargas B.
Keyword(s):  
Field Trials ◽  
Level Crossing ◽  
Level Crossing Rate ◽  
Signal Field

RESTRICTED SOLID-ON-SOLID MODEL: FROM LOCAL MORPHOLOGY TO CORRELATION FUNCTIONS AND SCALING EXPONENTS

2004 ◽  
Vol 18 (06) ◽  
pp. 827-840
Author(s):  
CHIH-CHUN CHIEN ◽  
NING-NING PANG ◽  
WEN-JER TZENG
Keyword(s):  
Computer Simulation ◽  
Probability Distribution ◽  
Correlation Functions ◽  
Master Equations ◽  
Interfacial Phenomena ◽  
Solid Model ◽  
Direct Simulation ◽  
Kpz Equation ◽  
Scaling Exponents ◽  
New Approach

We study the restricted solid-on-solid (RSOS) model by grouping consecutive sites into local configurations and obtain the master equations of the probability distribution of these local configurations in closed forms. The obtained solutions to these equations fit very well with those from direct computer simulation of the RSOS model. To demonstrate the effectiveness of this new approach for studying interfacial phenomena, we then calculate the correlation functions and even scaling exponents based on this obtained probability distribution of local configurations. The results are also consistent very well with those obtained from the KPZ equation or direct simulation of the RSOS model.

Dynamic Response of Surface-Moored Vertical Barrier to Wave Action by Analog and Digital Simulation

1974 ◽  
Vol 96 (1) ◽  
pp. 335-342
Author(s):  
J. R. Fowler ◽  
E. I. Bailey
Keyword(s):  
Theoretical Model ◽  
Digital Simulation ◽  
Nonlinear Problems ◽  
Analog Computer ◽  
Two Dimensional ◽  
Test Program ◽  
Analog Simulation ◽  
Vertical Barrier ◽  
Amplitude Data ◽  
Lab Test

The two-dimensional dynamics of an oil containment barrier, which was designed to have very low tensile loads due to current and waves, were simulated with a theoretical model. The model was solved on both analog and digital computers, and a lab test program conducted to verify the model. For nonlinear problems such as this, for which “exact” solutions do not exist, the analog computer has many advantages, principally rapid parameter studies and convenient plotting output, plus giving the engineer a real time “feel” for the problem. The problem treated here was especially well-suited to analog simulation. Charts and graphs present maximum force and amplitude data, and experimental verification of the solution was obtained from wave tank studies.

Fade Statistic Analysis of SC in Distributed Antenna System

2013 ◽  
Vol 336-338 ◽  
pp. 1708-1712
Author(s):  
Lei Li ◽  
Xiao Dong Wang
Keyword(s):  
Antenna System ◽  
Multiple Antenna ◽  
Level Crossing ◽  
Distributed Antenna System ◽  
Level Crossing Rate ◽  
Composite Fading ◽  
Distributed Antenna ◽  
Diversity Gains ◽  
Antenna Systems ◽  
Average Fade Duration

Exact and closed form expressions for the average level crossing rate (LCR) and average fade duration (AFD) of the output signal envelope of selection diversity system are derived, assuming each branch is subject to independent but nonidentical composite fading in distributed antenna systems (DAS). Numerical results validate the derived expressions. It shows that DAS promise significant diversity gains over collocated multiple antenna system.

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