A decision-support method for multi-parameter editing of parametric CAD models |
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| Affiliation: | 1. School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China;2. State Key Laboratory of Water Resourcesand Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;1. Department of Mechanical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan;2. Advanced Institute of Manufacturing with High-tech Innovations (AIM-HI), National Chung Cheng University, Chiayi 62102, Taiwan;3. Department of Intelligent Robotics, National Pingtung University, Pingtung 90004, Taiwan;1. Academy of Arts & Design, Tsinghua University, Beijing 100085, China;2. School of Politics and Law, Zhejiang Sci-tech University, Hangzhou 310018, China;3. Design Department, Politecnico di Milano, Milan 20158, Italy;1. Instituto Universitario de Investigación en Tecnología Centrada en el Ser Humano, Universitat Politècnica de València, Valencia, Spain;2. Dpto. de Ingeniería Mecánica y Construcción, Universitat Jaume I, Castellón, Spain;3. School of Engineering Technology, Purdue University, West Lafayette, IN, USA |
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| Abstract: | Parametric modeling is a computer-aided design (CAD) paradigm where a design can be created by defining geometric constraints with parameters. In design change as well as design optimization, the design is often edited by modifying the values of relevant parameters. Without guidance on allowable parameter ranges that can guarantee the intrinsic solvability of the geometric constraint system, the user could assign improper values to the model’s parameters, which would further lead to a failure in model updating. However, current commercial CAD systems provide little support on such guidance. Existing methods, though able to compute allowable ranges for individual parameters, face difficulties in handling multi-parameter situations. To solve this problem, a systematic method is proposed, supporting decision-making in multi-parameter model editing by computing allowable parameter ranges. In the method, a set of variable parameters from the geometric constraint system are first selected by the user; these variable parameters are to be sequentially edited within several editing operations. Before each editing operation, 1D allowable ranges of the variable parameters are computed. By editing parameter values within the provided ranges, the solvability of the geometric constraint system can be guaranteed. The effectiveness and efficiency of the proposed approach is verified by several experimental results. |
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| Keywords: | Computer-aided design Parametric modeling Geometric constraint solving Parameter ranges computation Multi-parameter editing |
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