eprintid: 10073138 rev_number: 18 eprint_status: archive userid: 608 dir: disk0/10/07/31/38 datestamp: 2019-05-03 15:55:10 lastmod: 2022-01-13 23:36:00 status_changed: 2019-05-03 15:55:10 type: article metadata_visibility: show creators_name: Roussel, R creators_name: Cani, M-P creators_name: Leon, J-C creators_name: Mitra, NJ title: Exploratory design of mechanical devices with motion constraints ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F48 keywords: Science & Technology, Technology, Computer Science, Software Engineering, Computer Science, Computational design, Design space, Constrained exploration, Drawing machines, Mechanical motion, Fabrication note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Mechanical devices are ubiquitous in our daily lives, and the motion they are able to transmit is often a critical part of their function. While digital fabrication devices facilitate their realization, motion-driven mechanism design remains a challenging task. We take drawing machines as a case study in exploratory design. Devices such as the Spirograph can generate intricate patterns from an assembly of simple mechanical elements. Trying to control and customize these patterns, however, is particularly hard, especially when the number of parts increases. We propose a novel constrained exploration method that enables a user to easily explore feasible drawings by directly indicating pattern preferences at different levels of control. The user starts by selecting a target pattern with the help of construction lines and rough sketching, and then fine-tunes it by prescribing geometric features of interest directly on the drawing. The designed pattern can then be directly realized with an easy-to-fabricate drawing machine. The key technical challenge is to facilitate the exploration of the high dimensional configuration space of such fabricable machines. To this end, we propose a novel method that dynamically reparameterizes the local configuration space and allows the user to move continuously between pattern variations, while preserving user-specified feature constraints. We tested our framework on several examples, conducted a user study, and fabricated a sample of the designed examples. date: 2018-08-01 date_type: published publisher: PERGAMON-ELSEVIER SCIENCE LTD official_url: https://doi.org/10.1016/j.cag.2018.05.023 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green article_type_text: Article verified: verified_manual elements_id: 1565813 doi: 10.1016/j.cag.2018.05.023 lyricists_name: Mitra, Niloy lyricists_name: Roussel, Robin lyricists_id: NMITR19 lyricists_id: RBMRO98 actors_name: Roussel, Robin actors_id: RBMRO98 actors_role: owner full_text_status: public publication: Computers & Graphics volume: 74 pagerange: 244-256 pages: 13 issn: 1873-7684 citation: Roussel, R; Cani, M-P; Leon, J-C; Mitra, NJ; (2018) Exploratory design of mechanical devices with motion constraints. Computers & Graphics , 74 pp. 244-256. 10.1016/j.cag.2018.05.023 <https://doi.org/10.1016/j.cag.2018.05.023>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10073138/1/authorVersion.pdf