scholarly journals Frequency Response Optimization of Saw Filter using Canonical Genetic Algorithm

2011 ◽  
Vol 26 (6) ◽  
pp. 45-49
Author(s):  
Prachi Chaudhary ◽  
Ms. Priyanka ◽  
Manoj Duhan
Keyword(s):  
Genetic Algorithm ◽  
Frequency Response ◽  
Response Optimization

Study on Benchmark Structure Damage Identification Base on Frequency Response Function and Genetic Algorithm

2010 ◽  
Vol 163-167 ◽  
pp. 2765-2769 ◽  
Author(s):  
Wan Jie Zou ◽  
Zhen Luo ◽  
Guo En Zhou
Keyword(s):  
Genetic Algorithm ◽  
Frequency Response ◽  
Response Function ◽  
Frequency Response Function ◽  
Damage Identification ◽  
Fitness Function ◽  
Floating Point ◽  
Combined Method ◽  
Structure Damage ◽  
Floating Point Number

A combined method for the Benchmark structure damage identification base on the frequency response function(FRF) and genetic algorithm(GA) is presented. The reducing factors of element stiffness are used as the optimization variables, and the cross signature assurance criterion (CSAC) of the test FRF and the analysis FRF is used to constructing the optimization object function and the fitness function of the GA. To avoid the weakness of binary encoding, the floating point number encoding is used in the GA. At last, the Benchmark structure established by IASC-ASCE SHM group is caculated by the proposed method, the results show that even if the serious testing noise is considered, the patterns of damage of the Benchmark structure can be identified well. The effectiveness of the presented method is verified.

Optimal Shape/Topological Design of Plate/Shell Like Structures Subjected to Periodic Excitations

1998 ◽  
Vol 14 (1) ◽  
pp. 41-48
Author(s):  
Hsien-Chie Cheng ◽  
Kuo-Ning Chiang
Keyword(s):  
Frequency Response ◽  
Optimization Problems ◽  
Mathematical Formulation ◽  
Excitation Frequency ◽  
Three Dimensional ◽  
Optimal Shape ◽  
Periodic Excitation ◽  
Topological Design ◽  
Fixed Design ◽  
Response Optimization

ABSTRACTThis paper deals with the optimal shape/topological design of plate/shell like structures subjected to a harmonic, periodic excitation using an improved Homogenization Based Optimization Algorithm (HBOA), proposed by Cheng et al., [7]. The major goal of this work is to improve or control the frequency response of structures via the optimal distribution of a given amount of material in a fixed design space. Based upon the improved HBOA, two types of frequency response optimization problems are extensively explored: (1) structures subjected to a periodic excitation with a single excitation frequency, (2) structures subjected to a periodic excitation with excitation frequencies in a frequency domain. To this end, the basic mathematical formulation and a solution method are proposed as well as two numerical examples of obtaining the optimum layout of three-dimensional plate/shell structures. An interesting result is reported from the current optimization problems in comparison with static optimization problems.

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