Research On Ontology-Based Cross-Domain Virtual Prototyping Technology

The development process of complex mechatronics products involves many domains and disciplines, and the prominent approach is Cross-Domain Virtual Prototyping, of which the two key problems, crossing-domain and automatic modeling technology, are left on ground. Basing on knowledge engineering and Ontology, this paper focuses on cross-domain design method and unified modeling technology, while adopting the component technology.Firstly, an ontology-based design-method is proposed for cross-domain products. By analyzing the requirements of cross-domain virtual prototyping for design-automation, we believe that cross-domain design-automation could be well realized basing on Ontology, and propose an ontology-based cross-domain design method. Then, we discuss the ontology-based cross-domain integration technology, cross-domain component technology and component-based multi-loop cross-domain design process model.Secondly, an ontology-modeling language is developed. We have a sight into the existing product-modeling language and ontology-modeling language, propose an ontology-based cross-domain product meta-modeling method, and present the detail formal syntax of our cross-domain virtual prototyping ontology-modeling language.Thirdly, an ontology-based evolvable virtual prototyping model is put forward to deal with dynamically evolving design process, cross-domain products inner structure and its interaction with environment. The Evolvable Virtual Prototyping, coming from hierarchical composition of Evolvable Integrated Components and Evolvable Component-Connection, presents unified digital mockup for cross-domain product design process, which well supports evolving design process. Evolvable virtual prototyping component model is described using virtual prototyping ontology-modeling language, thus builds a strong basis for Evolving Virtual Prototyping component storing, retrieving, reusing, design automation.Then, this paper explores cross-domain behavior modeling and simulation technology, and resolves multiple rigid-body system dynamics modeling in cross-domain integrated simulation environment. To support simulation-based cross-domain design validation and optimization, an expended Generalized Kirchhoff Network model is proposed, thus resolves multiple rigid-body system dynamics modeling problem. Then we use VHDL-AMS to describe the multiple rigid-body system dynamics model, and realize the automatic integration of multiple rigid-body system dynamics model equations. This enable the multiple rigid-body system well integrate into cross-domain synthetic simulation environment.Finally, Ontology-based cross-domain design process and management is expplored . In this section, we present an ontology-based approach for cross-domain design process meta-modeling method, and discuss description, organization and the execution control algorithm of design mission. By combining the case-based reasoning and heuristic reasoning, and introducing numerical calculation mechanism, data retrieval mechanism, and etc., the numerical attributes computing and retrieval function during reasoning is implemented.