Method of Escaping from Structural Instability and its Technological Development for Smart, Deployable Truss Structures that can Function like Muscles

本研究项目研究了如何以稳定的方式控制结构而没有任何不稳定的行为，分析了结构的非线性行为，并分析了一种有效的方法来构建可展开结构，承受大变形。通常，为了提高存储空间的效率并允许较大的结构被折叠，这种结构需要配备有多重折叠系统。当结构的形式发生变化时，一个非常重要的问题是如何控制它可能出现的结构失稳。一个非常困难的领域是控制系统的非线性行为，例如变形，当临界载荷施加到结构上并且结构系统失去平衡时变得更加复杂，因为一些构件似乎处于不稳定状态。通过观察生物系统并参考自然现象来研究这些问题，本研究的方法是尝试创建理想的可展开和折叠结构的机制。为了发明折叠结构的装置或机构，我们考虑将研究与多折叠微结构（MFM）的折叠实验进行比较，如果我们能够开发折叠分析，例如在增加载荷的参数下的运动运动学运动的扩展或折叠分析，则从工程角度来看是非常有用的。因此，我使用了日本和海外著名研究人员在机械、计算、材料和动力学等领域的技术知识。我的目的是收集有关日本和海外可展开结构研究论文的实验数据和信息。虽然在国际航空航天工程的开发和技术领域存在困难，但我已经创造了新的可展开结构，并为它们申请了专利，以便从积极的研究中发现系统的机制。

This research project has investigated how to control a structure in a stable way without any unstable behaviour, analysed a structure's nonlinear behaviour, and analysed an efficient way to build deployable structures that undergo large deformation. In general, to improve the efficiency of storage space and allow larger structures to be folded, such structures need to be equipped with a multiple folding system. When the form of the structure changes, a very important issue is how to control any structural instability it may display. A very difficult area is controlling the system's nonlinear behaviour, such as deformations, which become more complex when a critical load is applied to the structure and the structural system loses its balance as some of the members appear to be in an unstable state. Studying these problems by looking at biological systems and referring to natural phenomena, the approach of this research was to try to create mechanisms for ideal deployable and folding structures. To invent some device or mechanism for folding structures, we have considered comparing the research with the folding experiment of Multi-Folding Microstructures (MFM), and it would be very useful from an engineering viewpoint if we could develop a folding analysis, such as an analysis of expansion or folding with kinematic motion under a parameter of increasing load. Therefore, I have used the technical knowledge of famous researchers in fields such as mechanics, computing, materials and dynamics both in Japan and overseas. My aim was to gather information from experimental data and information regarding research papers of deployable structures in Japan and overseas. Although there were difficulties in the field of development and technology for international aerospace engineering, I have created new deployable structures and I have applied for a patent for them, in order to discover the system's mechanism from this active study.