Finite Element Analysis of Voice Coil Actuator Using Monolithic Mechanism
Authors: Mr. Ganesh Gulabrao Saner, Prof. A. B. Gaikwad, Prof. S .B. Jadhav
Abstract
Voice coil actuator are direct drive limited motion devices that utilize permanent magnet field and coil winding to produce a force that is proportional to the current applied to the coil. These non- mobile electromagnetic coupling devices are used in linear and rotary motion applications that require linear force or torque output and high acceleration or high frequency actuation. Generally used in loud speakers, VCA (Voice Coil Actuator) are gaining popularity in applications where tight servo control is necessity. The electromechanical conversion of VCA is based on Lorentz force principle. VCA need to be analysed to determine Power Spectral Density (PSD) plots, which are determined by Finite element analysis of VCA. Modal analysis and Random Vibration Analysis is performed to determine desired parameters.
Utilizing Ledger and Block Chain Technologies to Fight Digital Fraud and Fake Reality
Authors: A Vennela, A Jyoshna, B Radhika, M Deepika, R Mounika
Abstract
The growth of omnipresent, deep-seated fake information, misinformation, and misleading information, sometimes called false news, raises questions about the role of the Internet and social media in modern democratic countries. Digital disappointment has not just an emotional or a social cost because of its quick and extensive dissemination but may also cause major economic losses or national security threats. The block chain and other distributed ledger technologies (DLTs) ensure the origin and traceability of data by offering transparent, immutable and verifiable data tracking while establishing a secure peer-to-peer platform for data storage and exchange. This study seeks to investigate the potential of DLTs to prevent digital disappointment, describe the applications most relevant and highlight their major open issues. In addition, some guidelines for future investigators are outlined on topics which must be addressed in order to improve the resistance of today's online media to cyber attacks.
A Comparative Study on Strength characteristics of Concrete using Fly ash aggregates and Glass Fibre
Authors: Sunil Biradar, R Aparna, Ajith Kumar
Abstract
Various researches have been conducted in the area of fly ash utilization in the past. It is used as one of the most common type of cement replacement material in concrete production. But the production and utilization of manufactured aggregates with fly ash helps in achieving utilization of further more quantity of FA in the construction industries. Currently fly ash is being utilised in very large amount in construction industries as it can impart good strength and durability throughout its life time thus achieving environmental sustainability and limiting the demand for the natural resources in construction sectors also The concrete production needs aggregates as a static filler material for imparting expanded volume and stiffness to the concrete material. The crush aggregates are partially replaced with the pellets of Fly ash aggregates(FAA), This paper focuses mainly on the manufacturing process of light weight fly ash aggregates using pelletizer and also utilizing the glass fibre material as special reinforcing material in concrete to enhance the tensile properties of the concrete for the M40 grade replacing them partially. The strength characteristics of concrete such as compressive, flexural and split tensile strength determined were experimentally and conclusions were drawn.
The Directional Hierarchical AODV, DSR, DYMO Routing Protocol for Wireless Mesh Network Using Exata Simulator
Authors: Kadreshkumar V. N, Dr. G. F. Ali Ahammed, Dr. Imran Khan
Abstract
Wireless mesh networks (WMNs) can be considered as a key technology for next-generation wireless networking. However, field trials and experiments prove that the performance of WMNs still below expectations. Therefore, several challenging research issues need to be determined. The routing protocol is one of the important factors to be improved to be robust, scalable, secured and efficient. WMNs are low-cost access networks built on cooperative routing over a backbone composed of stationary wireless routers. WMNs must deal with the highly unstable wireless medium. Therefore, the design of algorithms that consider link quality to choose the best routes are enabling routing metrics and protocols to evolve. In this work, we analyze the state of the art in WMN metrics and propose taxonomy for WMN routing protocols. Performance measurements for a WMN, deployed using various routing metrics, are presented and corroborate our analysis. This paper aims to design and implement a routing protocol that improves the scalability of the WMNs. The Directional Hierarchical AODV (DH-AODV) routing protocol is proposed taking advantage of the existing fields of the control packets in the AODV in order to reduce the load on the network's bandwidth and to quickly detect route breakage. The proposed protocol is designed, implemented and evaluated using Qualnet Simulator. The Ad-hoc on-Demand Distance Vector (AODV) is selected as a benchmark. The simulation results indicate that this enhanced routing protocol can 47% reduce the end-to-end delay of data packets, improve the throughput by 11.2%, and decrease the packet loss rate 20% less than the standard AODV.
Comparative Analysis of Modified SHE - PSO PWM and LS-PWM Techniques
Authors: V. Ramu, Dr. G.N. Srinivas, Dr. P. Satish Kumar
Abstract
To address the issues of the multilevel inverters with better performance and efficiency there has been increased advancements with level shift PWM technique. The paper deals with the analysis of some such advancements like particle swarm optimization techniques and is contrasted to pulse width modulation technique in terms of total harmonic reduction, feasibility, switching pattern of PWM techniques and efficiency. Due to the conventional PWM techniques the complexity of the increased number of elements and harmonics can be reduced with the particle swarm optimization technique and can also determine the optimized switching angles in reducing the selected harmonics. The simulations of the analysis are carried out in the Matlab and the same are presented in the paper which are indeed proved to be better for PSO in contrast to conventional PWM techniques.