论文标题
具有不同的执行器和运动稳定的约束运动设计
Constrained motion design with distinct actuators and motion stabilization
论文作者
论文摘要
自适应结构的设计是提高建筑物可持续性的一种方法。自适应结构能够适应不同的负载和环境条件,或者通过小或大的变化来适应不断变化的要求。在后一种情况下,变形过程的力学和特性也对结构的能源效率发挥了作用。以前在作者组中开发的变分运动设计方法允许在两个给定的几何配置之间识别相对于定义的质量函数最佳的给定几何配置之间的变形路径。在初步的学术环境中,这种方法假设每种自由度都可以使用实现优化运动的任意外部驱动力。这些(节点)的力可以回收后验。目前的贡献涉及运动设计方法的扩展,即该运动将由预定义的致动力实现。这些可以是离散内部执行器元件的外部力量或规定的长度机会。作为附加约束,在运动过程中,每个中间配置的静态稳定性都被考虑在内。可以通过执行刚度矩阵的正决定因素来实现。
The design of adaptive structures is one method to improve sustainability of buildings. Adaptive structures are able to adapt to different loading and environmental conditions or to changing requirements by either small or large shape changes. In the latter case, also the mechanics and properties of the deformation process play a role for the structure's energy efficiency. The method of variational motion design, previously developed in the group of the authors, allows to identify deformation paths between two given geometrical configurations that are optimal with respect to a defined quality function. In a preliminary, academic setting this method assumes that every single degree of freedom is accessible to arbitrary external actuation forces that realize the optimized motion. These (nodal) forces can be recovered a posteriori. The present contribution deals with an extension of the method of motion design by the constraint that the motion is to be realized by a predefined set of actuation forces. These can be either external forces or prescribed length chances of discrete, internal actuator elements. As an additional constraint, static stability of each intermediate configuration during the motion is taken into account. It can be accomplished by enforcing a positive determinant of the stiffness matrix.