Liu Tinghao, Hao Guangbo
Electrical and Electronic Engineering, School of Engineering and Architecture, University College Cork, T12 K8AF Cork, Ireland.
Micromachines (Basel). 2022 Apr 19;13(5):651. doi: 10.3390/mi13050651.
A deployable structure can significantly change its geometric shape by switching lattice configurations. Using compliant mechanisms as the lattice units can prevent wear and friction among multi-part mechanisms. This work presents two distinctive deployable structures based on a programmable compliant bistable lattice. Several novel parameters are introduced into the bistable mechanism to better control the behaviour of bistable mechanisms. By adjusting the defined geometry parameters, the programmable bistable lattices can be optimized for specific targets such as a larger deformation range or higher stability. The first structure is designed to perform 1D deployable movement. This structure consists of multi-series-connected bistable lattices. In order to explore the 3D bistable characteristic, a cylindrical deployable mechanism is designed based on the curved double tensural bistable lattice. The investigation of bistable lattices mainly involves four types of bistable mechanisms. These bistable mechanisms are obtained by dividing the long segment of traditional compliant bistable mechanisms into two equal parts and setting a series of angle data to them, respectively. The experiment and FEA simulation results confirm the feasibility of the compliant deployable structures.
一种可展开结构可以通过切换晶格配置显著改变其几何形状。使用柔顺机构作为晶格单元可以防止多部件机构之间的磨损和摩擦。这项工作提出了两种基于可编程柔顺双稳态晶格的独特可展开结构。在双稳态机构中引入了几个新参数，以更好地控制双稳态机构的行为。通过调整定义的几何参数，可编程双稳态晶格可以针对特定目标进行优化，如更大的变形范围或更高的稳定性。第一种结构设计用于执行一维可展开运动。该结构由多串联的双稳态晶格组成。为了探索三维双稳态特性，基于弯曲双拉伸双稳态晶格设计了一种圆柱形可展开机构。对双稳态晶格的研究主要涉及四种类型的双稳态机构。这些双稳态机构是通过将传统柔顺双稳态机构的长段分成两个相等部分，并分别为它们设置一系列角度数据而获得的。实验和有限元分析模拟结果证实了柔顺可展开结构的可行性。
