Abstract
In the field of mechanism design, the compliant mechanisms have attracted more and more attention for the unique advantage including no need for assembling, no need for lubrication, no backlash and friction as well as easy fabrication than conventional rigid mechanisms. The periodically corrugated flexure beam units can provide a larger turn angle under the same force, so it is well suited to be designed as a revolute pair. In this paper, the relationship between external force, unit deformation and end point displacement is discussed according to the stiffness matrix method. The structural stress distribution is later discussed by the finite element method (FEM). After the mechanism analysis, a novel force sensor based on optical fibers is designed to detect the mechanical properties of the flexure units. The sensing principle is based on the intensity modulation of curved fibers that the power loss is directly related to the curvature change of a curved fiber. The mechanical-optical mapping relation is established to give the working principle of the sensor. The result shows that this newly designed force sensor has high accuracy and is suitable for the proposed structure.
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This work is supported by the National Natural Science Foundation of China (Grant No. 51820105007).
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Zang, H., Zhang, X., Zhang, H. (2021). Theoretical Analysis of a Novel Force Sensor Based on Optical Fibers Used for Semicircular Flexure Beam Unit. In: Liu, XJ., Nie, Z., Yu, J., Xie, F., Song, R. (eds) Intelligent Robotics and Applications. ICIRA 2021. Lecture Notes in Computer Science(), vol 13013. Springer, Cham. https://doi.org/10.1007/978-3-030-89095-7_25
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DOI: https://doi.org/10.1007/978-3-030-89095-7_25
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