Computer-Aided Product Form Design Generation Based on the Thinking Methods from Designers$ Sketches

[[abstract]]在產品研發的過程中，概念設計階段需要繪製大量的構想草圖，草圖概念設計是設計想像力及賦予新產品生命力的發展創造過程，維繫著新產品開發的成敗關鍵。但是目前並沒有適當的電腦輔助設計系統，可協助設計師有效率地發展產品外形構想。 因此，本計畫擬以設計師慣用的水平思考與垂直思考法，運用向量化2D輪廓曲線、特徵參數、外形摻合方法、模糊理論評價與遺傳基因演算法，結合3D CAD軟體系統，以二年的時間進行「應用草圖構想思考法於電腦輔助產品外形設計衍生」之研究。第一年之研究擬以垂直思考法與水平思考法衍生產品外形樣本，並完成3D實體模型建構；第二年之研究擬建立草圖外形的自動化衍生與評價模式，並建構完整的自動化外形衍生設計介面。本計畫各年度之目標成果如下： 第一年： 1. 建立水平與垂直思考外形衍生模式。 2. 建立草圖參數化模式。 3. 建立基礎外形樣本。 4. 建立外形階層衍生組配法則與編碼模式。 5. 完成3D特徵實體建模。 第二年： 1. 建立外形摻和衍生法則。 2. 建立外形意象語彙知識庫。 3. 建立衍生外形評價運算法則。 4. 建立最適外形衍生搜尋模式。 5. 建立自動化外形衍生與意象評價程式介面。[[abstract]]In the product development process, the conceptual design phase requires a great amount of idea sketches. They involve the innovative imagination which is important to the newly developed product. It is also a key point deciding the development success. Up to the present time, no computer-aided design systems exist to support a designer developing product form concepts efficiently. Therefore, based on the lateral and vertical thinking methods frequently used by designers, a two-year project for constructing a sketch-based generative system is planned and executed using 2D vector contour curves, feature parameters, form morphing, fuzzy evaluation, genetic algorithms and the 3D CAD software system. The first year’s research will create the product form samples based upon the lateral thinking and vertical thinking methods and construct the 3D solid models. The second year’s research will model the automatic sketch-based form generation and evaluation algorithms and establish the integrated design interface for automatic form generation. The annual achievements are drawn up as follows. The first year: 1. Construct the form generation model based on the lateral thinking and vertical thinking methods. 2. Construct the parameterized model for drafting of sketches. 3. Construct the basic form samples. 4. Construct the component combination rules for the form hierarchical generation and the encoding model. 5. Construct the 3D feature solid product models. The second year: 1. Construct the form morphing generation algorithms. 2. Construct the form image database of the linguistic adjectives. 3. Construct the evaluation rules for the generated forms. 4. Construct the optimal form searching model. 5. Construct an automatic design interface for automatic form generation and image evaluation[[note]]NSC101-2221-E327-001-MY