Papers by Keyword: Complex Product

Abstract: To solve the problem of difficult process data management caused by the unstable process in complex products assembly, by introducing the workflow technology, a method of multi-dimensional assembly process data management based on workflow was proposed. The evolution model of assembly process information was established from the perspectives of granularity, cycle and version. On this basis, the assembly process information organization model based on workflow was put forward. The detailed description of the management method of process data’s evolution in the perspectives of granularity and cycle was presented. The feasibility of proposed method was proved by actual engineering applications.

Abstract: To solve the problems of unstable process, frequent change and difficult management in assembly process of complex products, by introducing the workflow technology, the reverse process flow was defined based on analysis of assembly process execution and feedback process. The information model of process feedback was presented and a workflow based assembly process control and management method was proposed, and the real-time feedback of technology problems in workshops, the automatic running of reverse process as well as the assembly BOM based integrated management of process information were realized. The feasibility of proposed method was proved by actual engineering applications.

Abstract: Based on analysis the production characteristics of large-scale and complex products and the effects of materials and production capacity on production planning, this paper proposes a control model of large-scale and complex products production process based on Petri network associated with final assembly schedule (FAS). The model thinks about the requirement of materials and production capacity related to FAS, then we can trigger the relevant assembly operations if the state of resource place is able to match the weight of resource place operation. Through the application of Petri network control model, the effectiveness of production process control and decision-making and the feasibility of production planning are increased, at the same time manufacturing resources can be used effectively and well-balanced.

Abstract: The coupled tasks of complex product may lead to iterations and iterative process and it would influence the quality and schedule of the complex product development. To achieve a reasonable planning about tasks, this paper works on the information transfer between measurable tasks to calculate the dependency degree on the basis of the variability and sensitivity, then construct a fuzzy dependency structure matrix to reflect the dependency of the coupled tasks. Then utilize matrix power to identify coupled task set, and decouple the coupled tasks. At last, this paper verifies this theory with instance.

Abstract: Aiming at problems of repeated labor and low level of information sharing and integration degree in design process, an integrated design method based on MCSSMW (Multi Client Single Server Multi Workstation) work pattern for complex product is proposed. Integrated developing platform based on PDM was proposed after the detailed analysis of large-scale complex product modular decomposition mechanism and communication mechanism in distributed collaborative design. an integrated design platform for multi-user casting crane is developed, and the proposed method's validity is verified by the example.

Abstract: There are a lot of dynamic changing problems for design version in the complex product design process. We have study a dynamic version control technology for result it. Firstly, we have researched the three level version control model, including the complex product structure layer, the node version tree layer and the version structure layer. Secondly, we have researched the version control model operations, including the version structure operations and the version operations, and analyzed the implementation of the version generation function and the version mergence function. Finally, the method has been applied and verified in the development of an aircraft flight loads integrated design platform.

Abstract: For representing the coupling relationships among various correlate elements in the formation process of assembly qualities, the mapping relations between the structure domain and the quality domain was established on the basis of analyzing the hybrid structure assembly. Through classifying the quality characteristics, the quality domain was divided into two sub-sets which are quality control points set and quality attributes set. Defining the relevant elements in the model, such as vertex, arc, etc by the theory of network flow, the coupling relations among various quality control points in the formation process of assembly qualities were reflected. According to the sequence of quality control points entering into assembly environment, their corresponding hierarchy in the model were determined, which presents the timing sexual of the formation process of assembly qualities. At last, a correlation-model between quality attributes and quality control points in the assembly process of complex product based on network flow was established, which would be the theoretical basis for the dynamic tolerance optimization of quality control points. An example of an automobile active gear axle assembly was given to demonstrate the feasibility of the correlation-model.

Abstract: The research of Service science, engineering and management （SSME） is depended on knowledge resources, and related to the process of serving. The research objective of this paper is oriented on a complex product design service which with the characteristics of disciplinary fusion, integration and coordination of knowledge, and the hypothesis oriented on knowledge flow was proposed for research this special service object. The content of this hypothesis is an experiential view, that is, modern complex product design process is driven by design task, and it is a knowledge flow process, whose core is new knowledge acquisition. Based on this experiential view, this study proposed a design process control and knowledge service research frame of complex product. Moreover, to promote the understanding and realization of the hypethesis mentioned above, the modeling and control of the design process of modern complex product through the process of knowledge flow, original knowledge acquisition of disciplinary subjects supporting for the construction of knowledge resources, and the construction and formal organization of resource unit based on knowledge base were conducted in this study. The knowledge flow-oriented hypothesis, experiential view and relevant prospective research results, are supposed to provide knowledge base and theory reference for the formation of SSME relevant axiom and theorem

Abstract: Effective reuse and integration of multidiscipline model resources is a key issue and challenge in the Virtual Prototyping for Complex Products. Based on the Meta Object Facility and Component-based Modeling, This paper proposes a new component-based Meta Modeling Framework (M²F) of Complex Product Virtual Prototyping as a solution, providing the model specifications for each abstract layer (CAP model, CIM model and High-level model) in the framework. M²F enables multi-layered abstraction of those isomerism models in Complex Product Virtual Prototype and facilitates the unified modeling, reuse and integration of models. A case study about typical complex product indicates this approach not only makes the system-level modeling of virtual prototype easy, but also improves the reusability of component models. At the end of this paper, conclusion and future works are given.

Abstract: In connection with characteristics of complex product development, in order to solve problems of long product development cycle, multi-collaborative firms, difficult to control product quality in manufacturing firms, the approach of complex product lifecycle quality management technology based on the collaboration of 3D virtual product and physical product is put forward. The connotation of complex product lifecycle quality management technology based on 3D product model is analyzed. Complex product lifecycle quality management model based on 3D product model is founded also. Base on 3D virtual product model and PLM technology, key technologies on complex product lifecycle quality management are described in detail.