A method to determine design contradiction based on TRIZ evolution theory and TOC prerequisite tree is proposed. Product evolution object is identified according to TRIZ evolution pattern and TOC prerequisite tree is employed to determine design obstacles. A contradiction determining flow and template based on obstacle analysis is established to determine design contradiction. Then by using TRIZ separating principle and contradiction matrix, design contradiction issolved. The above process is demonstrated by an engineering example.

In the economical circumstance of buying-market, product design must meets the needs of customer, product innovation must promotes customer satisfaction, so the system of product innovation based on customer satisfaction is very important in product design. On the ground of customer satisfaction investigation, the article has provides three dig methods which are the mini customer satisfaction, the fuzzy simulated based on genetic algorithm and the clustering methodof extension based on customer satisfaction, those methods focused on differentaspects respectively to dig the innovative points, then synthesize the dig methods of product innovation by using fuzzy calculation inference, after getting the innovative points of product, special knowledge and skills are needed which redesigns the product, one computational example of dig methods on product innovativepoints has been provided. Using the system of product innovation based on customer satisfaction is given, the innovative product design can meets the needs of customer.

Acquisition principle framework of design requirement function and model of customer knowledge space are established facing to customer requirement function in concept design. By taking the five basic function sets, namely motion, power, control, connection and synthesis, as construction units and the customer requirement function matrix including them as expression form in function domain, space transformation and calculation principle and their judging rules are set up. In transformation process, the 3D space and transformation calculation are transformed into 2D plane and corresponding transformation calculation, whichrealizes the transformation from customer requirement function to design requirement function simultaneously with the realization of transformation from customer knowledge space to designer knowledge space and then obtains design requirement function including each basic function set space. An illustration running through the whole paper is utilized to demonstrate the feasibility of this theory and method and finally corresponding conclusion and the content of further research are provided.

The concept of multi-cell manufacturing system is proposed from the viewpoint of layout design, and thus all layout problems of various manufacting systems can be converted into layout design problem of multi-cell manufacting system, which includes two aspects—machine layout and cell layout. For the former aspect, a solution strategy combining optimization modeling with virtual reality technique is presented; for the later aspect, an integrated layout design methodology is proposed, which includes an integrated layout model and a hybrid solution algorithm.

Customized product of ETO (engineering-to-order) is hard to program and realize to automation due to the complex structure of its product family, bigdifference between product structures, involvement of personal experience and inspiration during design process, and a large amount of interaction between human and machine. Artificial neural network can simulate the structure of human brain and intelligent behavior, and have the ability of parallel processing, redundancy, self-organization, self-adaptation and association, which accords with the features of configuration design. Through analysis of ETO customized product requirements, a BP artificial neural network with some structure and function isestablished and trained. The trained network contains rules and experiences of ETO configuration design. Illustrations have demonstrated its feasibility.

CNC machine tool is an important manufacture equipment. To improve its design level and capability, it is necessary to import new technology and design method in design and development of CNC machine tool. To apply virtual prototype, a new engineering design theory and method, in design and development of CNC machine tool, specific implementation process of CNC machine tool virtual prototype based on the concept of virtual prototype is proposed. Analysis and compare on the features of the distributing software platform to implement this process and UG integrated environment are carried out. Taking development of a new type of CNC milling machine as an example, research on construction and simulation process of CNC machine tool virtual prototype in UG integrated environment is conducted. Then, research on numerical model, assembly, motion simulation, structure analysis and manufacture simulation of CNC machine tool virtual prototype arecarried out and corresponding illustrations are provided. The research indicates that construction of CNC machine tool virtual prototype and comprehensive simulation on it can effectively completed by adopting the function modules of UG and total optimization of designed machine tool can be achieved. This research provides a feasible advanced method for design and development of CNC machine tool.

The solid model of a commercial vehicle's driving axle house was established with Pro/Engineer Wildfire 2.0. According to FEM theory, the finite element model of this axle house is set up and its stress analysis is performed by FEA software MSC.Nastran. Based on the result of stress analysis, by adopting effective fatigue lifespan prediction method, lifecycle analysis of axle house is conducted by MSC.Fatigue, a professional fatigue analysis system and then fatiguelifespan distribution of the whole axle house body and the lifespan value of most dangerous points are obtained. By comparing the failure position and fatiguelife of the axle house in the rig test, the results show that the prediction result is the same as the one obtained from experiments. Then, the fracture surface of specimenswhich brought on fatigue invalidation in rig test is investigated with scanningelectron microscopy (SEM). Finally, on the basis of the results got from simulation calculation and rig test, the modified design of axle house is presented.

Structural design of this new type of marine pneumatic digital valve is close-loop mechanism. Therefore, it is impossible to increase its stability,speediness and precision simultaneously. The effect of changing model structure parameters and working parameters of valve mechanism on the aforementioned performances is nonlinear and non-dully. Hence, to enhance the comprehensive performance of this digital valve, further analysis and research on its characteristicsmust be taken. The simulation result can guide engineering practice and providereferences for similar research projects.

To improve the ability of predicting and preventing LPG tank major accidents and resisting casualties, according to occurrence and development of PLGtank accidents such as leak, dispersion and explosion due to fire, a LPG tank major accident dynamic simulation evaluation system is developed. Based on the above, design of function, module and data in this software system is carried out.Through VC and MATLAB visualized object-oriented interface technology, visualization of the change of characteristic parameters with time and distance and simulation evaluation after accidents are implemented. This system could runwithout MATLAB and can dynamically display evaluation results through graphs, and then predict the destruction situation at specific position and furthermore evaluate influence range and destruction degree. Engineering application indicates that it is feasible to apply this system in security evaluation of LPG tank major accident and this system can also be utilized in security evaluation of manufacture and reservation enterprises with danger of fire and explosion or with poisonous gas and liquidized gas.

The vertical coupling dynamic model of vehicle-track is established by means of modal analysis and by utilizing Wilson-θ numerical integral method, the random response of rails are achieved. Based on random process over-crossing theory, dynamic response reliability of rail under various over-crossing hypothesis and extremum distribution are obtained, and then it is compared with the result of numerical simulation calculation. The results indicate that for lower over-crossing limit, the calculation result of Gumbel-distribution method is theclosest to the exact value; while for high over-crossing limit, Gauss-distribution has the best effectiveness.

Based on the idea of intelligent control and configuration of nine-point controller, the concept of seven-state controller and its three stable control strategies are presented. This controller adopts different control actions according to the phase space composed by error and error change to meet the requirements. The corresponding relations between phase space and response curve of the seven different actions of this controller are analyzed and curve is studies through actions. Under the action of controller, simulation analysis on various second-order targets is carried out. The authors can draw the conclusion that seven-state controller has excellent dynamic performance and robust capability, and can reach satisfactory control result on different control targets.

A PLC control system based on PROFIBUS-DP and MPI network has been developed to overcome the shortcomings of the control system in some acrylic fiberproducing lines, which includes closed communication, frequent malfunction, inconvenient maintenance and high cost. This system drives the electromotor throughtransducer controlled by PLC. Monitoring communication network adopts MPI and field bus employs PROFIBUD-DP. After field installation and adjustment, the whole system runs stably and with high reliability, and as well it has high opennessand is convenient to monitor.

For stream autoclave, an key equipment in producing silicate production of building material industry, its corrosion is the toughest problem obsessing the whole industry. To solve this problem, the reason of generating corrosion is analyzed and several kinds of coats are designed. And then arcspray aluminum compound coat is validated to the most effective one through experiments. Moreover, the thickness range of this coat and method to enhance its fine and close are provided, which has been demonstrated in Xuzhou Aeroconcrete Plant Jiangsu, China. Finally, The authors point out that arc spray aluminum compound coatcan prevent corrosion, reduce thickness, increase its service life and save manufacture materials, and then make the service life of autoclave accord with thatof aeroconcrete assembly life.

Due to advancement in science, development of technology and enhancement of customer's awareness, product lifecycle are greatly shortened and how to help designers master customer's feeling and escalate effectiveness of product innovation in time cannot be ignored. Starting from the theory and knowledge of Kansei engineering, object product, phone fee recoder, is divided into various color components. Then, a poll system designed by color combination theory is made. According to the theory of back-propagation neural network, customer's evaluation is simulated and finally, the optimal color combination through genetic algorithm iteration is gained. The results indicate that this system can carried out successfully with the abovementioned method. A decision support system for evaluation of color combination can be established by employing the results of thisresearch to accelerate design flow. And assistant designer can perform product color design effectively and objectively.

Comparing with the currently almost exclusively used serial structures, Parallel kinematic robots are a promising alternative in all application fields. The principal advantages of parallel kinematic robot are its high structure stiffness and its ability to reach large acceleration. In parallel kinematic robot, besides active joints-driving mechanism, passive joints is indispensable. These passive joints have more translational and rotational degree of freedom in most cases. The major requirements of these joints are big mobility, high stiffness, small mass and compact structure space. The currently available joints cannot meet these requirements.

Near interfaces of solid and liquid, electric double layer has electro-viscosity effects. Theoretical study shows that this electro-viscosity will make friction coefficient increase in thin film lubrication. The purpose of this study is to verify the influence of electric double layer on aqueous lubrication in an experimental way. Experiments were done on a composite sliding block tester, with distilled water as basic lubricant. Two different methods were adopted in the experiments. One is to add external electric field on friction pair and the other is to change ionic concentration in lubricant with additive -KCL here. Both methods can make electro-viscosity change according to theoretical research. During experiments, friction coefficient and steaming potential were measured.Experimental results show that electro-viscosity has significant influence on friction coefficient when film is thin. Friction coefficient increases obviously under thin film situation when external electric field is added or ionic concentration of lubricant is changed. In addition, with the increase of concentration of KCL, friction coefficient increases quickly. Test results indicate that electro-viscosity has significant effects on aqueous lubricating performance.

The mapping relationships among the motion coordinate errors along nine single coordinate lines, the straightness error and 21 other initial error items, and the mapping relationships among the tool geometric errors related to work-piece space and initial error items are researched using laser interferometer for a three-axis machining center. Then, a nine-line measurement method and a volumetric error compensation method are put forward. Moreover, the rapid identification of initial error items and compensation of volumetric error are realized.