No abstract

No abstract

A new Symmetric Solar Fed Inverter (SSFI) proposed with a reduced number of components compared to the classical, modified, conventional type of Multilevel Inverter (MLI). The objective of this architecture is to design fifteen-level SSFI, this circuit uses a single switch with minimizing harmonics, and Modulation Index (MI) values. Power Quality (PQ) is developed by using the optimization algorithms like as Particle Swarm Optimization (PSO), Genetic algorithm (GA), Modified Firefly Algorithm (MFA). It’s determined to generate the gating pulse and finding optimum firing angle values calculate as per the input of MPP intelligent controller schemes. The proposed circuit is solar fed inverter used for optimization techniques governed by switching controller approach delivers a major task. The comparison is made for different optimization algorithm has significantly reduced the harmonic content by varying the modulation index and switching angle values. SSFI generates low distortion output uses through without any additional filter component through utilizing MATLAB Simulink software (2020a). The SSFI circuit assist Xilinx Spartan 3-AN Filed Program Gate Array (FPGA) tuned by optimization techniques are presented for the effectiveness of the proposed model.

The present work focuses on the discrete dislocation dynamics simulations performed for analyzing various dislocation reactions in copper single crystals during uniaxial tensile deformation. The dislocation dynamics simulations were carried out with initial random distribution of Frank–Read sources. The crystals were subjected to tensile loading along [1 0 0], [1 1 1], [1 1 2] and [2 1 3] crystallographic axes. The hardening behavior of a metal single crystal is controlled, to a large extent, by dislocation interactions leading to junction formation and cross-slip. The interactions occurring between the dislocations, formation of junctions, occurrence of cross-slip, their contribution to hardening and softening, and dislocation density evolution were analyzed. Also, analysis was carried out to identify the number of occurrences of different reactions as a function of crystallographic orientations of loading axes. The strength due to self-hardening and latent-hardening dislocation reactions on the deformation of crystal was then analyzed. We have attempted to analyze the hardening and softening caused by various reactions including cross-slip. The self and latent hardening coefficients do not appear to depend on the crystallographic orientation of loading axes and are generally in agreement with the previous studies.

Compressive strength of composites is an important engineering requirement. Experimental determination of compressive strength of composites is very much time consuming and error prone. At present, there are some micromechanical models available in the literature to predict the compressive strength of unidirectional composites. But these models require fiber and resin mechanical properties as input. Resin mechanical properties can be obtained experimentally. But there are no standard test techniques for the evaluation of mechanical properties of fibers. In this study, an analytical method is presented for the evaluation of elastic properties of transversely isotropic fibers. Starting with experimentally obtained compressive strengths of typical unidirectional composites and inverse micromechanical models, elastic properties of the transversely isotropic fiber are obtained. This approach gives current elastic properties of the fibers, and not the virgin properties. Further, starting with the current fiber and resin elastic properties, compressive strength of unidirectional composite is determined using micromechanical models for different fiber volume fractions.