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柔性铰链在微机电领域得到了日益广泛的应用。该文提出了一种新型柔性铰链:单边直圆椭圆混合型柔性铰链,以卡氏第二定理为理论基础,推导了单边直圆椭圆混合柔性铰链的柔度计算式。采用所得计算式对一组实例进行柔度计算,同时对其进行有限元分析,通过对比分析,验证了计算式的正确性。借助于推得的计算式,分析了单边直圆椭圆混合柔性铰链的各结构参数对其柔度的影响。通过与双边直圆椭圆混合柔性铰链对比分析,得出了单边直圆椭圆混合柔性铰链的转动能力、对载荷的敏感性均优于双边直圆椭圆混合柔性铰链,综上所述,单边混合柔性铰链的提出为柔性铰链在结构紧凑、大位移场合的工程应用提供了新的思路。
Flexible hinge in the field of micro-electromechanical has been increasingly widely used. In this paper, a new type of flexible hinge is proposed, which is a single-sided, round-oval hybrid flexible hinge. Based on the second theorem of Cartesian equation, the formula for calculating the flexibility of a single-sided straight circular elliptical hybrid flexible hinge is derived. The calculated formulas are used to calculate the flexibility of a set of examples and the finite element analysis is carried out. The correctness of the formulas is verified through comparative analysis. With the help of the deduced formula, the influence of various structural parameters of the unilateral straight circular oval hybrid flexible hinge on its flexibility is analyzed. Through the comparison and analysis of the flexible hinges with the biaxial and round oval hybrid, the rotational capability of the single-sided straight and elliptical hybrid flexible hinges is obtained, which is more sensitive to the load than the flexible bimetallic flexible hinges. To sum up, The proposal of hybrid flexible hinges provides a new idea for engineering applications of flexible hinges in the fields of compact structure and large displacement.