کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
803454 904649 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimized five-bar linkages with non-circular gears for exact path generation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Optimized five-bar linkages with non-circular gears for exact path generation
چکیده انگلیسی

In this paper, a five-bar linkage with non-circular gears is proposed as a mechanism capable of precisely moving a coupler point along a prescribed trajectory. The first step of the proposed methodology is the inverse kinematic analysis of the linkage, whose mobility, without geared bodies, is two. Therefore, by imposing the required configuration of the coupler at any instant, the rotation of the two inputs is evaluated. A pair of non-circular gears is then synthesized on the basis of the relation between these two angular inputs, thus reducing the mobility to one. The final combined mechanism is able to exactly perform a specific task of path generation.In the design of non-circular gears, a basic requirement is that the non-circularity of the pitch curves is kept as low as possible. Such non-circularity affects both the feasibility of gear manufacture and the dynamic behaviour of the output non-circular gear. For this reason, an optimization of the five-bar linkage with non-circular gears is also proposed, by defining the objective function on the basis of proper dimensional and kinematic criteria. A penalty method is used to manage a set of constraints to which both the linkage and the gears are subjected, while a genetic algorithm is employed to search for a global optimum solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanism and Machine Theory - Volume 44, Issue 4, April 2009, Pages 751–760
نویسندگان
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