scholarly journals Design of Shaped Beam Planar Arrays of Waveguide Longitudinal Slots

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Giovanni Andrea Casula ◽  
Giuseppe Mazzarella ◽  
Giorgio Montisci
Keyword(s):  
Design Procedure ◽  
Pencil Beam ◽  
Shaped Beam ◽  
Planar Arrays ◽  
Slot Arrays ◽  
Synthesis Procedure ◽  
Set Up ◽  
Aperture Distribution ◽  
Longitudinal Slot ◽  
Effective Design

The Elliott’s procedure for the design of a pencil beam waveguide longitudinal slot array has been generalized to encompass the design of shaped beam planar slot arrays. An extended set of design equations, taking into account in an operative way the feeding part of the array, has been devised. From this set of equations, a general and effective design procedure has been set up, shedding light on the constraints posed by a complex aperture distribution. The results of the proposed synthesis procedure have been validated through comparison with a commercial FEM software.

scholarly journals Design of Multilayer Dielectric Cover to Enhance Gain and Efficiency of Slot Arrays

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Giorgio Montisci ◽  
Zusheng Jin ◽  
Mingchao Li ◽  
Hu Yang ◽  
Giovanni Andrea Casula ◽  
...  
Keyword(s):  
Free Space ◽  
Production Cost ◽  
Synthesis Method ◽  
Design Procedure ◽  
Optimal Choice ◽  
Slot Arrays ◽  
Consequent Reduction ◽  
Effective Design ◽  
Array Gain ◽  
Multilayer Dielectric

An effective design procedure, based on the Elliot synthesis method, is proposed to investigate the properties of waveguide slot arrays with multilayer dielectric cover. Then, the features of the designed arrays are analyzed by means of a FEM commercial software, namely, Ansys HFSS 13. We show how a proper choice of the dielectric cover configuration allows increasing the array gain and aperture efficiency, while taking advantage of the properties of the radome structure, in terms of insulation, protection, and pressurization of the radiating waveguides. Therefore, a significant outcome of the optimal choice of the multilayer dielectric cover is the reduction of the number of slots with respect to an array radiating into free space with the same gain and efficiency, with a consequent reduction of the production cost.

An effective design procedure for A-Sandwich radome

2010 ◽  
Author(s):  
Kyung-Won Lee ◽  
Yeong-Chul Chung ◽  
Ic-Pyo Hong ◽  
Jong-Gwan Yook
Keyword(s):  
Design Procedure ◽  
Effective Design

An Automated Procedure for Intelligent Mechanism Selection and Dimensional Synthesis

1988 ◽  
Vol 110 (2) ◽  
pp. 130-137 ◽  
Author(s):  
A. H. Soni ◽  
Mohammad H. F. Dado ◽  
Yicheng Weng
Keyword(s):  
Complete System ◽  
Design Procedure ◽  
User Interaction ◽  
Automated Synthesis ◽  
Selection System ◽  
Dimensional Synthesis ◽  
Rule Based ◽  
Rule Based System ◽  
Configuration Selection ◽  
Synthesis Procedure

This paper describes the fundamentals for the development of the intelligent selection system for the mechanism configuration and the development of an automated dimensional synthesis procedure. The selection system is a rule-based system. Using an interactive dialogue with a designer; the system converges to an appropriate mechanism configuration satisfying a prescribed synthesis requirements including type of synthesis problems, number of precision positions, and number of independent inputs. The user has an option to inquire the selection system to give reasons for the mechanism configuration selection. The automated synthesis procedure uses the data supplied by the selection system to generate the design equations. A powerful numerical algorithm solves the design equations giving all possible solutions without the need of supplying initial guesses. The complete system provides a valuable tool that performs a comprehensive design procedure with minimal user interaction and background knowledge in mechanism design.

An intelligent fixture with a dynamic clamping scheme

2000 ◽  
Vol 214 (3) ◽  
pp. 183-196 ◽  
Author(s):  
A Y C Nee ◽  
A Senthil Kumar ◽  
Z J Tao
Keyword(s):  
Quality Assurance ◽  
Control Strategy ◽  
Sensory Feedback ◽  
Design Procedure ◽  
Integrated Approach ◽  
Fixture Design ◽  
On Line ◽  
Thin Walled ◽  
Set Up ◽  
Dynamic Clamps

Both proper fixture design and optimum fixturing execution are crucial to workpiece quality assurance in manufacturing. This paper deals with an integrated approach to fixturing problems and, in particular, a ‘live’ fixture with sensory feedback and on-line fixturing control strategy to perform an optimal fixturing operation. The framework of an integrated fixture design procedure is first presented. The functions and structure of an intelligent fixture are proposed. The prototype intelligent fixture with dynamic clamps capable of delivering accurate but varying clamping intensity is developed. This novel set-up has been proven to be effective for workpiece quality improvement and productivity enhancement through machining experiments on thin-walled workpieces.

scholarly journals Vibrational Analysis of Quarter Car Vehicle Dynamic System Subjected to Harmonic Excitation by Road Surface

2012 ◽  
pp. 46-49
Author(s):  
S. H. Sawant ◽  
Mrunalinee V. Belwalkar ◽  
Manorama A. Kamble ◽  
Pushpa B. Khot ◽  
Dipali D. Patil
Keyword(s):  
Dynamic Performance ◽  
Vibrational Analysis ◽  
Design Procedure ◽  
Harmonic Excitation ◽  
Performance Study ◽  
Front Suspension ◽  
Road Profile ◽  
Quarter Car ◽  
Set Up ◽  
Input Motion

A front suspension of Hyundai Elantra 1992 model is assigned as quarter car model and is considered for the performance study. Modeling the dynamic performance of an automobile car system represents a complex task and forms an important step in its design procedure. In this paper the stationary response of quarter car vehicle model moving with a constant velocity over a rough road is considered for the performance study. For this a simplified model and experimental set up is developed. The deterministic impulses due to road profile are given by an eccentric cam which gives input motion to front suspension acting as a follower of the cam. The displacements obtained by FFT analyzer at upper mount of shock absorber were compared with the analytical and MATLAB results.

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