Mechanical advantage is traditionally defined for single-input and single-output rigid-body mechanisms. A generalized approach for identifying single-output mechanical advantage for a multiple-input compliant mechanism, such as many origami-based mechanisms, would prove useful in predicting complex mechanism behavior. While origami-based mechanisms are capable of offering unique solutions to engineering problems, the design process of such mechanisms is complicated by the interaction of motion and forces. This paper presents a model of the mechanical advantage for multi-input compliant mechanisms and explores how modifying the parameters of a model affects their behavior. The model is used to predict the force-deflection behavior of an origami-based mechanism (Oriceps) and is verified with experimental data from magnetic actuation of the mechanism.
Increased interest in origami-based mechanisms has resulted in designers looking to them for solutions to engineering problems. Of particular interest is the ability to develop self-folding mechanisms that perform a pre-determined function in the presence of an applied field, requiring models that predict the mechanism’s force-deflection behavior and actuation input needs. In order to assist in the design of such mechanisms, this paper presents a model of the mechanical advantage for origami-based forceps (Oriceps) and explores how modifying the parameters of the model affects their behavior. The model is used to predict the force output of Oriceps actuated in an applied magnetic field. The predictions of the model are validated through experimental data.
As interest in origami-inspired mechanisms continues to grow, there is an increasing need to better understand the fundamental types of motion possible in origami models and how to effectively actuate them. This paper addresses this need with an in-depth study of action origami models and their motion. Approximately 140 action origami models were folded and analyzed. Groupings of action origami models are proposed based on observed fundamental motions from this study. Eleven different motions are outlined and defined with the associated actuation forces that drive them. Considerations for effective placement of actuation forces and back-drivability of each defined motion are included in the discussion.
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