Li Ping Zhao

Service Design for Product Lifecycle in Service Oriented Manufacturing

In order to provide value-added service for products during product lifecycle and service support for manufacturing enterprises in global range, based on the production mode of service oriented manufacturing(SOM), the development flow of service design based on product lifecycle and Six Sigma is established. In the base of each stage information of product lifecycle, the development flow is divided into service requirement analysis, service design, service machining and service maintenance four stages. According to requirements of SOM, the family of methods and development tool of service design are provided based on Six Sigma concept, a service design for product lifecycle development system framework in SOM is constructed, which is with service requirement as service object, by means of product lifecycle management (PLM) managing product data in entire product lifecycle, transforming information from service manufacturing and equipment e-maintenance into service design information. Finally, a product lifecycle oriented information model of service design is studied, by which data on product design, process and crafts, quality, cost, sale and maintenance could be contacted and feedback manufacturing and maintenance information to service design process, for laying a foundation for satisfying requirements of service oriented manufacturing.

Dynamic quality characteristics modelling based on brittleness theory in complex manufacturing processes

To comprehensively and quantitatively analyse the influencing factors of dynamic quality characteristics in complex manufacturing processes, depending on the brittleness analysis of dynamic quality characteristics based on man–machine–environment influencing factors, this paper established a man–machine–environment brittleness model of dynamic quality characteristics based on the brittleness theory of complex system. According to the brittleness relation among the brittleness factors of dynamic quality characteristics (BFDQCs) in this model, a key man–machine–environment influencing factor identification method of dynamic quality characteristics was proposed by the definition of brittle risk degree, brittle coupling degree and brittle degree among BFDQCs. Finally, a case study for applicability was presented. The result showed that the proposed method was available, and can provide guidance for the analysis of dynamic quality characteristics and support for product reliability in complex manufacturing processes.

A System Framework of Dynamic Coupled Quality Control Based on Complex Network

Due to the demands of dynamic quality control in manufacturing process, a system framework of dynamic coupled quality control (DCQC) was proposed. The framework analyzed the coupled relation between quality attributes (QAs) of product, and established the weighted coupled network (WCN) model by defining the nodes properties formalized. According to the model, the coupled mechanism was analyzed and the monitoring technique of key quality points was put forward based on brittleness analysis and autocorrelation analysis. Furthermore, the dynamic quality improving mechanism was performed to realize the real-time control. Finally, an application analysis was presented to demonstrate the rationality and validity of the method.

Processing Quality Dynamic Control Based on Quality State

Depending on the identification methods of quality state such as correlation analysis, a quality identification and control model based on quality state was established in this paper. This model included formal description methods, identification methods, and quality control strategies. Based on the product quality data correlation analysis, the model’s application procedures were put forward. It provides an effective approach to maintaining ideal quality state, to improving the stability and controllability of quality control system. It constructs an application foundation for quality dynamic control.

Inter-enterprise Multi-processes Quality Dynamic Control Method Based on Processing Network

During the course of inter-enterprise processing network quality control, for judging and analyzing the others process quality influence of the abnormal process quality, especially key process quality influence, and servicing whole the multi-processes quality control course, the inter-enterprise multi-processes quality control method based on processing network by means of inter-enterprise quality control model based on fractal network is proposed. In the method, multi-processes processing network is constructed by process mapping, the key process can be figured out based on the analysis of processing network sensitivity. To the key process, depending on multi-processes cost function based on cost influence coefficient among processes, the method can establish the comprehensive optimizing object function including cost and error propagation. Depending on the optimum solution of the object function solved by genetic algorithm, the key process can correct to regulate and distribute the control parameters to decrease accumulative error, to avoid false alarm and misstatements originated from the abnormal process. This application course of method could be applied with a multi-processes manufacturing example.

Minimum quality loss oriented reconfiguration method for inter-enterprise process quality control system

Dynamic continuous competition, which leads to the phenomena of incomplete information that exists in the process of inter-enterprise dynamic quality tracking and control, makes inter-enterprise quality control more and more complicated. In this paper, with the goal of inter-enterprise products minimum quality loss, the probability model of inter-enterprise dynamic quality tracking and control based on incomplete information is established. On the basis of different collaborative demands, reconfiguration strategy of inter-enterprise quality control system is established. Reconfiguration of inter-enterprise quality control system is divided into model reconfiguration and function reconfiguration by adopting agent theory, which lays foundation for dynamic control of enterprises process quality.

Identification Method Based on Multiple Order Correlation Analysis of Arc Surfaced Cam Motion Curve

Conventional arc surfaced cam curve fitting mostly used the least squares to realize, however, arc surfaced cam required to ensure the movement curve of the displacement, velocity and acceleration continuous smooth. Therefore, it needed multiple order correlation analysis of arc surfaced cam motion data, to get the correlation coefficient and its similar morphology category of arc surfaced cam actual movement in surface of position, velocity and acceleration, to provide a theoretical basis for further improving surface machining precision of arc surfaced cam motion.

Design Method for Modular Machine Tool Based on MC33C

To realize machine tool modular customization and configuration, the driving and mapping model of customer requirement is established in the environment of various customer requirement and mass individualized customization, which can transform processing of parts driven by customer requirement into function configuration FC, structure configuration SC and appearance configuration AC (3C) of module features. Besides, to solve the question of module manufacturability, by module compatibility analysis on dynamic, kinematic and aesthetic (MC3), a multi-dimensional configuration method for manufacturable of modular machine tool based on MC33C is proposed in this paper. Finally, A case study is given to prove effectiveness and adaptability of the proposed method, and the result shows that the various and individualized requirements are meet and design efficiency is improved.

Dynamic Model for Product Innovation Alliance Oriented to Competitive Advantage

Technology innovation alliance strategic is a basic and a trend for product innovation in SMEs (small and medium-sized enterprises). Researching on cooperative dynamic mechanism, FGEM for product innovation alliance in SMEs is built based on entropy theory. To improve the product innovation ability and comprehensive entropy management level, a standardized evaluation index and evaluation system is proposed, and a product innovation alliance dynamic evaluation method is constructed to give a new way for sustainable development of enterprises and constant innovation and upgrading of products.

The Bending Interface Model for Flexible Three-Dimensional Microstructure

For the flexible three-dimensional microstructure, the GMC single-cell method was applied to establish the mechanical model of the bending interface, and then the interface micro-element method based on composite materials was performed to work on the interfacial properties of weak interfaces and micro-mechanical behavior. As a result, a flexible interface model for the interface stress was constructed and it would be helpful to improve the bending properties of the flexible three-dimensional microstructure.