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Mechanical response of a cellular sandwich core material, balsa wood, is investigated over its entire density spectrum from 55 to 380 kg/m3. Specimens were compression loaded along the grain direction in both quasi-static and dynamic strain rates from 10−3 to 103 s−1. Results show that while the initial failure stress is very sensitive to the rate of loading, plateau (crushing) stress remains unaffected...
STATCOM controlled power system shows highly non-linear characteristics. In such a structure, linear controllers are easy to apply but difficult to tune. Fine tuning of controller parameters is necessary to meet transient performance requirements. In this paper, control system parameters of a STATCOM which is constructed from two six-pulse voltage source based converters are optimized by Simplex algorithm...
This paper investigates the behaviour of the time-averaged electron density and electron energy for neutral gas pressures between 0.5 Pa and 10 Pa, and for different radii between 5 cm and 20 cm of the neutral loop (NL). The particle-in-cell (PIC) simulation results of radially and axially resolved profiles are presented. The influence of the reactor geometry and gas pressure on the homogeneity and...
Several circuit architectures have been proposed to overcome logic faults due to the high defect densities that are expected to be encountered in the first generations of nanoelectronic systems. How feed-forward artificial neural networks can possibly be exploited for the purpose of conceiving highly reliable Boolean gates is the topic of this paper. Computer simulations show that feed-forward artificial...
Modeling of the coupling between the mechanical and thermal fields is extremely important in the computational analysis of dynamic deformation processes. Fundamental physical quantity that governs this coupling is the fraction of plastic work converted into heat, i.e., beta factor. The present study describes an experimental procedure in which classical split-Hopkinson pressure bar (SHPB) technique...
In this paper, the peak-to-average power ratio (PAPR) problem for orthogonal frequency division multiplexing (OFDM) is investigated. The variations in the nature of the problem along with the utilization of water-filling technique are observed and the corresponding cumulative distribution function for PAPR is determined. In addition to OFDM analysis, another analysis is carried out for the comparison...
Rapid advance in additive manufacturing techniques promises that, in the near future, the fabrication of functional cellular structures will be achieved with desired cellular microstructures tailored to specific application in mind. In this perspective, it is essential to develop a detailed understanding of the relationship between mechanical response and cellular microstructure. The present study...
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