scholarly journals Smart Wireless Power Transfer Operated by Time-Modulated Arrays via a Two-Step Procedure

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Diego Masotti ◽  
Alessandra Costanzo ◽  
Vittorio Rizzoli
Keyword(s):  
Computer Aided Design ◽  
Power Transmission ◽  
Transfer Performance ◽  
Wireless Power ◽  
Harmonic Radiation ◽  
Full Wave ◽  
Array Architecture ◽  
Step Procedure ◽  
Novel Method ◽  
Aided Design

The paper introduces a novel method for agile and precise wireless power transmission operated by a time-modulated array. The unique, almost real-time reconfiguration capability of these arrays is fully exploited by a two-step procedure: first, a two-element time-modulated subarray is used for localization of tagged sensors to be energized; the entire 16-element TMA then provides the power to the detected tags, by exploiting the fundamental and first-sideband harmonic radiation. An investigation on the best array architecture is carried out, showing the importance of the adopted nonlinear/full-wave computer-aided-design platform. Very promising simulated energy transfer performance of the entire nonlinear radiating system is demonstrated.

scholarly journals Optimizing Router Placement of Indoor Wireless Sensor Networks in Smart Buildings for IoT Applications

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6212
Author(s):  
Mohammed A. Alanezi ◽  
Houssem R. E. H. Bouchekara ◽  
Muhammad S. Javaid
Keyword(s):  
Computer Aided Design ◽  
Wireless Sensor ◽  
Optimal Placement ◽  
Smart Buildings ◽  
Smart Building ◽  
Iot Applications ◽  
Step Procedure ◽  
Optimal Network ◽  
Cad Tool ◽  
Aided Design

Internet of Things (IoT) is characterized by a system of interconnected devices capable of communicating with each other to carry out specific useful tasks. The connection between these devices is ensured by routers distributed in a network. Optimizing the placement of these routers in a distributed wireless sensor network (WSN) in a smart building is a tedious task. Computer-Aided Design (CAD) programs and software can simplify this task since they provide a robust and efficient tool. At the same time, experienced engineers from different backgrounds must play a prominent role in the abovementioned task. Therefore, specialized companies rely on both; a useful CAD tool along with the experience and the flair of a sound expert/engineer to optimally place routers in a WSN. This paper aims to develop a new approach based on the interaction between an efficient CAD tool and an experienced engineer for the optimal placement of routers in smart buildings for IoT applications. The approach follows a step-by-step procedure to weave an optimal network infrastructure, having both automatic and designer-intervention modes. Several case studies have been investigated, and the obtained results show that the developed approach produces a synthesized network with full coverage and a reduced number of routers.

Toward Effective Mechanical Design Reuse: CAD Model Retrieval Based on General and Partial Shapes

2009 ◽  
Vol 131 (12) ◽  
Author(s):  
Min Li ◽  
Y. F. Zhang ◽  
J. Y. H. Fuh ◽  
Z. M. Qiu
Keyword(s):  
Computer Aided Design ◽  
Mechanical Design ◽  
Three Dimensional ◽  
Cad Model ◽  
Model Retrieval ◽  
Cad Models ◽  
Feature Based ◽  
Novel Method ◽  
Aided Design ◽  
Model Similarity

In product design, a large proportion of three-dimensional (3D) computer-aided design (CAD) models can be reused to facilitate future product development due to their similarities in function and shape. This paper presents a novel method that incorporates modeling knowledge into CAD model similarity assessment to improve the effectiveness of reuse-oriented retrieval. First, knowledge extraction is performed on archived feature-based CAD models to construct feature dependency directed acyclic graph (FDAG). Second, based on the FDAG subgraph decomposition, two useful component partitioning approaches are developed to extract simplified essential shapes and meaningful subparts from CAD models. Third, the extracted shapes and their FDAG subgraphs are indexed. Finally, the indexed shapes that are similar to user-sketched queries are retrieved to reuse, and FDAG information of the retrieved shapes is provided as redesign suggestions. Experimental results suggest that the incorporation of modeling knowledge greatly facilitates CAD model retrieval and reuse. Algorithm evaluations also show the presented method outperforms other 3D retrieval methods.

A shape optimization library for the design of microwave components

2013 ◽  
Vol 6 (1) ◽  
pp. 31-37
Author(s):  
Najib Mahdi ◽  
Stephane Bila ◽  
Serge Verdeyme ◽  
Michel Aubourg ◽  
Khaled Khoder ◽  
...  
Keyword(s):  
Shape Optimization ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Optimization Techniques ◽  
Dual Mode ◽  
3D Objects ◽  
Full Wave ◽  
Microwave Components ◽  
Unloaded Quality Factor ◽  
Aided Design

This paper outlines an original shape optimization library backed by a three dimensional (3D) full-wave electromagnetic (EM) simulator, combining several efficient structural optimization techniques and suitable for viable computer-aided design (CAD) of complex microwave components. The microwave components are modeled by finite element method (FEM) and their dimensions and shape are optimized using four techniques: design of experiments (DOE), level-set method (LS), topology gradient (TG) method, and genetic algorithm (GA). The various methods allow determining the optimal geometry, shape or topology of 2D or 3D objects within the microwave device, by minimizing iteratively a cost function related to the desired specifications. Typical demonstration illustrates the versatility of the proposed library based on the design of a dual mode dielectric resonator filter in order to improve its unloaded quality factor by keeping the same frequency isolation, their accuracy and efficiency are verified by the available measured results.

Computer Aided Design of Split Power Hydrostatic Transmission Systems

1984 ◽  
Vol 198 (1) ◽  
pp. 61-69 ◽  
Author(s):  
R E Dorey ◽  
N D Vaughan
Keyword(s):  
Computer Aided Design ◽  
Power Transmission ◽  
Full Potential ◽  
Unified Approach ◽  
Transmission Systems ◽  
Hydrostatic Transmission ◽  
Design Alternatives ◽  
Ideal Approach ◽  
Military Tanks ◽  
Aided Design

Split power hydrostatic transmission systems have been proposed in applications ranging from machine tool drives to military tanks. So far only quite simple arrangements have been considered and the full potential of the transmission remains to be exploited. This paper investigates the design of the split power transmission for a vehicle drive and shows how the transmission characteristics can be matched to the particular requirements of the vehicle duty. The number of design alternatives makes a computer investigation an ideal approach to assess the most appropriate solution in a given application. To enable computer programs describing behaviour of complex transmissions to be easily constructed and altered requires a unified approach to the modelling procedure. The paper describes how such an approach can be used for the evaluation of transmission performance and emphasizes the importance of the computer model in determining the efficiency and fuel economy of the vehicle transmission system.

scholarly journals A Comparative Study on Current- and Voltage-Optimized Circuit Scheme for Multiple-Transmitter and Single-Receiver WPT System

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jin Zhang ◽  
Weiao Xu ◽  
Dong Chen ◽  
Chen Zhang
Keyword(s):  
Comparative Study ◽  
Power Transmission ◽  
Input Power ◽  
Structural System ◽  
Wireless Power ◽  
Full Wave ◽  
Source Voltage ◽  
Constant Source ◽  
Single Receiver ◽  
A Current

As an important structural system for effectively improving power delivered to the load (PDL) and power transmission range, multiple-transmitter (TX) and single-receiver (RX) wireless power transfer (WPT) system is gaining more and more attention in both academic circles and the industrial fields. Based on the Lagrange multiplier method, this paper first provides a current- and voltage-optimized circuit scheme to maximize the PDL of the multiple-TX WPT system. Then, for a determined WPT system, the current-optimized circuit scheme is proposed to maximize the PDL effectively with constant source voltages and feeding currents for TXs. While voltage-optimized circuit scheme can effectively adjust the source voltages and feeding currents and maintain the same level of input power and PDL as a current-optimized solution. Through comparative study, the voltage-optimized solution shows its advantages in adjustable source voltage and feeding current without any degradation of PDL. Finally, the theoretical analysis results are confirmed by the results of full-wave electromagnetic simulation.

Dynamic Simulation of the Assembly Process of Spindle Box of Machine Tool

2010 ◽  
Vol 455 ◽  
pp. 503-506
Author(s):  
X.M. Li ◽  
Y.F. Tong ◽  
An Feng Hui
Keyword(s):  
Machine Tool ◽  
Dynamic Simulation ◽  
Computer Aided Design ◽  
Engineering Students ◽  
Power Transmission ◽  
Simulation Software ◽  
Assembly Process ◽  
Transmission Process ◽  
Parts Library ◽  
Aided Design

Based on the analyzed transmission process of spindle head and combined with the analyzed assembly process of spindle box, it determined the relationships of transmission and assembly between the various components of the spindle head. Firstly, using software of computer-aided design (UG6), it established a 3D parts library of spindle box of machine tool. Secondly, we had been developed dynamic simulation and power transmission simulation software of the assembly process of the spindle box of machine tool. It could realistically reproduce the disassembly process and the power transmission process of spindle box of machine tool when running the software. The software not only could be used for the old products to analysis and improvement, but also could be used for development of new products, and to some extent, the prototype could be replaced by it. The software was one of the essential tools for both the training of related employees and teaching of mechanical engineering students.

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