Advanced Materials Research Vols. 308-310

Abstract: On the basis of studying the principle of centrifugal dewatering technology applied to refined cotton, the paper analyzes the key technologies of screen plugging and pushing resistance concerning problems of cotton fiber blocking screen stencil and impracticality of pushing when refined cotton is tested on P-60 centrifuge, in combination with refined cotton’s properties. Besides, measures of improvement are proposed as to the design of the centrifuge’s main components’ structures, which lays a good foundation for further development of refined cotton centrifuge.

Abstract: Form innovation is a particular field in innovative theory and design methodology. In order to develop creative thinking and obtain innovative product form, it has been put forward in this paper that an effective and systematic design approach based on the features of form design. According to this method, form innovation is subdivided into innovation in functional attribute and visual style. Therefore, product innovative design can be implemented smoothly and efficiently by combining the effective innovative tools and the creative thinking. A case study, chair innovative design for fast-food shops, has been conducted to demonstrate the effectiveness of the approach proposed in this paper which will stimulate and systematize the creative thinking.

Abstract: This paper presents a new method of product module partition based on the fuzzy clustering analysis. This method demonstrates the relevant definitions and calculation methods of the initial partition, min-max partition, submodule relevancy and module aggregation etc., and establishes the incidence matrix to respectively carry out the initial partition for the products and calculation of min-max partition according to various incidence relations between parts and components. Taking the submodule as computing unit in each module set, this paper carries out the fuzzy cluster analysis to obtain the module partition results of the products, and finally demonstrates the rationality and effectiveness of this method by taking the example of the working units of the wheel loaders.

Abstract: A free form surface reconstruction method based on least square support vector regression is presented. Firstly in order to eliminate noise points, some sample points are chosen from the measured data to construct LS-SVM model. Thus a LS-SVM model to approximate the measured points is obtained. And the distribution probability of the approximation error is figured out. In result, the noise points are eliminated when their error probability is less than the specified threshold value. Then the boundary points are extracted. Lastly the surface model is reconstructed by use of the measured points from which noise points have been eliminated. The results indicate that the reconstruction precision can satisfy the demands of engineering application.

Abstract: Piezoelectric actuator was widely used in precision machinery as driving element used for their small size, high frequency, large resolution displacement and so on. A new micro-displacement amplifier driven by PZT is designed in this paper. The concrete machine parameters are studied out by finite element analysis. And the prototype is trial-manufactured. Experiential results show that the new mechanism has good displacement amplification performance and dynamic characteristics.

Abstract: Engineering design is an innovative process that relies heavily upon associations to past experience and similar designs. Design rationale (DR) explains why an artifact is designed the way it is. An explicit representation of DR can bring many benefits to understand, modify, or reuse a design. This paper argues that because the design is a cognitive activity continuously iterative and evolving, the conventional argument-based representation of DR has some inherent limitations. An intent-driven representation model is created to capture and formalize the evolving DR. The DR elements and their interactive relationships are defined. Furthermore, two methods to reconstruct the DR model, namely the structure-based clustering and the context-based extraction, are explored to reduce the complexity of the model and to support effective DR traceability for the reuse purpose. Finally, a graphical DR modeling system is developed. And the future research is discussed.

Abstract: According to the effective of the displacement of crane boom to rated capacity, establishing a mechanical model with a prototype. After calculation and analysis, take drastic measures to ensure the rated lifting capacity. And the measures are worth popularizing.

Abstract: Usability testing is an important usability practice to evaluate a product by testing it on users. In this paper, the essentiality and particularity of mobile phone usability testing are analyzed, and the limitation of applying the traditional usability testing method to the mobile phone usability testing is explained. On this basis, an effective usability testing method specialized for mobile phone is pointed out, it gives solutions to two problems in mobile phone testing, i.e. testing in the real environment and real-time monitoring users’ all reaction such as operation, expression and etc.

Abstract: To improve the design process efficiency, this paper proposes the principle and methodology that design process gene controls the characteristics of design process under the framework of design process reuse and optimization based on design process gene. First, the concept of design process gene is proposed and analyzed, as well as its three categories i.e., the operator gene, the structural gene and the regulator gene. Second, the trigger mechanism that design objectives and constraints trigger the operator gene is constructed. Third, the expression principle of structural gene is analyzed with the example of design management gene. Last, the regulation mode that the regulator gene regulates the expression of the structural gene is established and it is illustrated by taking the design process management gene as an example.

Abstract: Based on the multi-body dynamics theory and visualization technology, a planetary gear train system is studied in RecurDyn. The multi-body dynamics model of the 2K-H planetary gear train system is built to do the visual analysis on dynamic characteristic of the planetary gear system severally in the ideal steady-state condition and the random-load condition, than the real-time dynamic contact stress and some other meaningful results of the key components are gained. Compared the related simulation results with that of the theoretical analysis, it is known that two kinds of results are consistent and the simulation analysis on the planetary gear train system is correct and accuracy. From the research above, the new idea and analytical tool are provided for the traditional, static, "redundancy" design method of the gear system, and also the effective technical mean is provided in conceptual design of complex mechanical products to predict the performance, then to reduce the "birth defects" in design stage and also an effective and efficient technical means for engineering applications is offered for optimal design and developing new product on gear train system.