ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Analysis and optimization of two-degree of freedom LEMs flexure hinge
Received date: 2016-04-14
Revised date: 2016-05-04
Online published: 2016-05-10
Supported by
National Natural Science Foundation of China (50905075); Six Talent Peaks Project in Jiangsu Province (ZBZZ-012); Fundamental Research Funds for the Central Universities (JUSRP51316B); Open Project of State Key Laboratory of Mechanical System and Vibration of China (MSV201712); Open Project of the State Key Laboratory of Robotics and System of China (SKLRS-2016-KF-06)
In order to improve the flexibility of lamina emergent mechanisms (LEMs), a two-degree of freedom LEMs flexure hinge that can realize in-plane and out-of-plane rotation is proposed. The structure of the two-degree of freedom LEMs flexure hinge is designed combining the features of elliptical flexure hinge with LET flexure hinge. The theoretical models of the rotational equivalent stiffness along axes y and z for the two-degree of freedom LEMs flexure hinge are deduced using spring models. The correctness of the theoretical models is verified by comparing the theoretical calculation and the finite element analysis. The impact of structural parameters on two kinds of rotational stiffness is also discussed. An optimization model is then established to increase the rotation property of two-degree of freedom LEMs flexure hinge, and the structure parameters are optimized by adaptive particle swarm optimization. The results of optimization show that the rotation property is improved significantly when the rotational stiffness in the y and the z directions decreases by 83.60% and 92.73% respectively. The optimization is in line with our expectation.
LIU Kai , CAO Yi , ZHOU Rui , GE Shuyi , DING Rui . Analysis and optimization of two-degree of freedom LEMs flexure hinge[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(2) : 420317 -420326 . DOI: 10.7527/S1000-6893.2016.0142
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