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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/74667

    Title: 多目標技術的限制基因演算法於電熱式微致動器最佳化
    Other Titles: Multiobjective technique in constraints handling GA for electro-thermal microactuator optimization
    Authors: 蘇育德;Su, Yu-De
    Contributors: 淡江大學機械與機電工程學系碩士班
    Keywords: 多目標技術;基因演算法;電熱式微致動器;結構最佳化;Multiobjective technique;Genetic Algorithm;Electro-thermal microactuator;Structural optimization
    Date: 2011
    Issue Date: 2011-12-28 19:15:00 (UTC+8)
    Abstract: 本文以基因病變的程度模擬限制條件的違反量,將總違反量轉換為第二個設計目標。將原目標函數做為第一個設計目標,使用多目標策略的非支配排序法,同時最小化這兩個目標,求得柏拉圖解(Pareto);此時的限制條件將會收斂至零,只保留原目標函數的值。本文將敘述此方法的過程及最佳化程序,並以數值例題及結構設計問題來驗證此方法的效率性及收斂性,並與文獻結果進行比較。
    The quantity of violation in constraints is simulated to the concept of gene pathological change in biological system. The violation of all constraints is transformed to an artificially second design objective required to be minimized simultaneously. Consequently, the original objective integrated with such artificial objective to construct a two-objective in design optimization problem. A unique Pareto point can be sequentially obtained in which the value of second objective will converge to zero. This thesis presents the complete numerical algorithm and process in dealing with such a genetic revolution based optimization method. Some illustrative problems are solved and compared with that in published papers.
    Another topic in this thesis is the development for the optimization of electro-thermal microactuator and the application using constrained GA presented in this thesis. The design objective is the maximization of the deflection on a working point that corporate with a upper temperature limitation. Four models of electro-thermal microactuator are explored. The first category contains three models of single hot arm: constant length model, constant width model, and variable length/width model. The fourth model is double hot-arm model. The structural material volume, design deflection, and temperature influence are primary study items. Each model has its own feature that can be applied on particular situation. The optimum operating voltage can be obtained during the proposed solution process. In general, double hot-arm model results in the largest expected displacement; however, it requires a larger amount material than other model.
    Appears in Collections:[Graduate Institute & Department of Mechanical and Electro-Mechanical Engineering] Thesis

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