Acceleration Factor

description10 papers

group7 followers

lightbulbAbout this topic

Acceleration Factor refers to a quantitative measure used in various fields, particularly in reliability engineering and life testing, to express the ratio of the rate of failure or degradation of a system under accelerated conditions to that under normal conditions, facilitating the estimation of product lifespan and performance.

lightbulbAbout this topic

Acceleration factors for reliability analysis of electronic assemblies

by Enrico Galbiati

2019, EMPC PISA 2019

There are several models for the calculation of the acceleration factor for the electronic assemblies subjected to stress tests. A correct reliability assessment requires an accurate analysis of these models and the evaluation of their... more

Tu (often indicated with “To,”) and Trer have lifferent meanings depending on the component type: hey are the junction temperatures for integrated circuits and semiconductor components, the average -ase temperatures for capacitors and resistors, and the winding temperatures for inductors. As an example, we can analyse the equation for acceleration factor of the temperature, mr, which where all ms and my, are all the applicable 7 in the stress conditions and in the use conditions, respectively.

descriptionView Paper arrow_downwardDownload

Power Perturbation Method for Power Flow Analysis

by Co. SEP

This paper proposes an improved load flow method based on perturbation theory which is simple, efficient and reliable. The performance of the proposed method has been tested on well-conditioned IEEE 5-bus, 14-bus, 30 bus and also tested... more

Figure 1: Basic schematic diagram of a typical bus system. Equations and subsequent Mathematical model for the said problem can be enumerated as follows: Keywords: Acceleration Factor; Gauss-Seidel (G-S) Method; Power Perturbation (P-P) Method; Specified Real & Reactive > ower.

The Gauss-Seidel method [12]-[14] is an iterative process which starts by assigning estimated values to the unknown bus voltages. Using the estimated bus voltages and the specified real and imaginary power values, a new value for each bus voltage is calculated at the end of each iteration. The process is repeated until the difference between each bus voltage and its corresponding value in two successive iterations is less than a predefined tolerance value. Expanding Eqns. 8 & 9 by Taylor's series results to

Very often, a mathematical problem cannot be solved exactly or, if the exact solution is available, it exhibits such an intricate dependency in the parameters that it is hard to use as such. Perturbation theory gives a systematic answer to this question. The proposed methodology can be outlined by the flowchart as shown in Figure 2

Figure 3.Comparison of G-S & P-P Method (Iterations for different IEEE bus systems)

Figure 4 Comparison of G-S & P-P Method (Convergence time in seconds for different IEEE bus systems) - The same is shown in the Figure 4 in a graphical form which reveals that time required for Power Perturbation method is smaller than the conventional G-S method. Tablel.Comparison of Computation Time in Second

descriptionView Paper arrow_downwardDownload