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Towards an ontology for generative design of mechanical assemblies

机译：面向机械装配生成设计的本体

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摘要

In software-based generative design, a user specifies goals expressed as objectives and constraints to a software application and the application returns a set of feasible and/or optimal design solutions. For problems involving discrete design variables, such as in configuration design, searching the design space is often computationally intractable. Therefore, in the context of the configuration design of mechanical assemblies, we are investigating the use of ontologies to model and reason about designs while providing the ability to more efficiently prune infeasible designs. In this paper, we present an ontology to specify connection, parthood, and shapes in mechanical assemblies, so that the constraints of feasible configurations can be logically expressed and used during generative design. The ontology extends the Ground Mereotopology (MT) of Casati and Varzi to a multi-dimensional mereotopology and combines it with a qualitative shape ontology based on the Hilbert's axiomatic theory of geometry. Relationships between equi-dimensional individuals are captured by MT, while individuals with different dimensions are mereotopologically independent and are related by incidence relations. The proposed ontology is a module in the larger effort to develop an overarching PhysicalWorld Ontology. We demonstrate the application of the proposed ontology in specifying properties of suspension systems and mechanical joints.
机译：在基于软件的生成设计中，用户指定表示为软件应用程序的目标和约束的目标，并且该应用程序返回一组可行和/或最佳的设计解决方案。对于涉及离散设计变量的问题，例如在配置设计中，搜索设计空间通常在计算上是棘手的。因此，在机械组件的配置设计的背景下，我们正在研究使用本体对设计进行建模和推理，同时提供更有效地修剪不可行的设计的能力。在本文中，我们提出一种本体来指定机械装配中的连接，局部性和形状，以便可以在生成设计期间逻辑地表达和使用可行配置的约束。本体论将Casati和Varzi的地面人体拓扑学（MT）扩展到多维的层状拓扑学，并将其与基于希尔伯特公理学的几何理论的定性形状本体论相结合。等维数个体之间的关系由MT捕获，而不同维数的个体在拓扑学上是独立的，并且通过发生率关联。拟议的本体是开发总体物理世界本体的更大努力的模块。我们演示了所提出的本体在指定悬挂系统和机械接头特性方面的应用。

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