To improve the capacity of domestic enterprises in technology absorption, assimilation and recreation, a re-creative design method based on function ontology was proposed. By using the knowledge library of function ontology, the structure-to-function mapping was conducted through function matching and function combination. After comprehensively understanding and abstracting the original function model, the functional synonyms and antonyms were analyzed by functional generalization and specification and function variation was achieved by the obtained substitute function. And through the improvement and replacement of the original function, an upgraded function model was obtained and the re-creative design of products was implemented by seeking a new function realization method in the function realization method library. A case study is given to illustrate the proposed re-creative design method．

By taking designing environmentfriendly products as the objective, a new method of product ECO-design was proposed, which mapped ECO-design strategies (SEDs) to environmental assessments (EA). The way how to apply this method to the process of the initiation of product design concept was presented and by taking a manual capping machine as an instance, the advantages of this method in specific product design was demonstrated. By adopting the matrix of EA, the SEDs were better classified and refined. And according to importance degree of every SED on different products, special guidance design could be achieved．

According to the requirement of top-down design, the transformation method from the function model to assembly model based on mapping was proposed. Through the information instantiation and rules expression, the feasibility of the mapping technique was guaranteed. Through establishing the different instance libraries and Mapping tables, transformation of the model information could be realized well. Through mapping the functional units to the assembly units, the functional constraints were mapped to the assembly connected feature and assembly relations, which realized the top-down transfer of design constraints and the integration of functional design & structural design. The assembly sequence was interactively processed using binary tree to model, and the structure integrity of assembly models and its assemblability were insured. Feasibility of this method was verified through the developed prototype system.

Aiming at the 1^st -order dynamic process with the disturbance of ARIMA(0,1,1), the effect of abnormal causes is analyzed and an economic design model integrating SPC (statistical process control) and EPC (engineering process control) based on quality feature constraints was established. This method can minimize the cost of the whole production process in the perspective of economy, and meantime take into account the special requirements of product quality features. The research results can provide some theoretical basis for the design of variance EWMA control chart

In order to reduce the mismatch between the persons cultivated in industrial design major in colleges and the persons actually required by the society, the KJ method was used to cluster ability demand into 9 clusters and cluster the courses into 6 modules. The weight of ability demand (WAD) was calculated by analytical hierarchy process (AHP) and it was input to the house of quality (HoQ) together with satisfactory degree of talent demand (STD). When the course modules were designed, the information in the HoQ acted as a basis and the objective STD was determined according to the information from the college itself and its opponents. On the basis of this, the objective planning model was established and the objective values of every course module were calculated. And finally the course system of industrial design major was obtained to guarantee that the cultivated persons could fulfill the social demands.

Based on the idea of mechanical optimization design, through the analysis on the front-overing-shell stamping mould, models meeting the requirements were built. The Dynaform software was used for CAE analysis. Because CAE was introduced, press deformation was developed from the original analysis on strain and stress to simulation and analysis of process by finite element method and so on. Finally, press process optimization design was implemented.

Rubber-steel Top Mounts were used as a flexible joint between the shocker and the bodywork in Macpherson strut to improve ridecomfort performance, and the analysis test of the vertical dynamic characteristics was carried out to analyze their influence on the dynamic characteristics of suspensions by mount. The dynamic test based on their actual installation and their working condition was performed on the MTS 810 material testing system. The dynamic test frequencies were between 1 and 12 Hz because the major range of the vehicle working frequency is 1-12 Hz. The mathematic model according to the dynamic experiment results was established based on the bilinear restoring hysteretic force. The hysteretic force was the sum of linear rigidity force, the third order rigidity force, linear damping force and bilinear restoring force, and the parameters of the mathematic model were identified one by one to improve the accuracy of the small parameters. Comparing with the test data, the difference between the test result curve and the curve obtained from the simulation is very little, which indicates that the proposed method is suitable for engineering working especially with the mount whose damping force is relatively small. The proposed method provides a good foundation to analyze the influence to the suspension vertical characteristics．

Through research on involute spiral bevel gear and starting from the tooth profile meshing law, an accurate modeling method irrelevant to machining method for involute spiral bevel gear was proposed. Based on the above theory, an OpenGL-based special modeling software for involute spiral bevel gear was developed, which integrated geometry design, dynamic simulation and mechanism calculation together. Through convenient parameter input, the 3D solid modeling of involute spiral bevel gears was generated automatically. During the modeling process, spherical involute was established directly by equations to guarantee the accuracy of tooth profiles, which provided accurate model for consequent finite element mechanism calculation of involute spiral bevel gears．

According to structure and working principle of single axis air bearing table and through analyzing the friction torque and power of the core component of single axis air bearing table—externally pressurized gas bearing, the friction torque and power of single axis air bearing table were obtained. Based on this, low velocity free rotation regularity of the single axis air bearing table were derived under the condition of ignoring external air damp, that was the angular velocity and speed of single axis air bearing table each was a single exponential function which decayed with time. By using Matlab curve fitting toolbox curve fitting of discrete data which is collected by experiment is carried out and the result shows that fitting curve completely conforms to the regularity of low velocity free rotation of single axis air bearing table．Therefore the regularity is a valuable reference for reliability design of single axis air bearing table.

High voltage electrostatic field is the key parameter impacting the effect of purification and sterilization of air purifiers. In order to determine the impact of the structural parameters of electrostatic field on air purifiers, the 2-demension characteristics of air purifiers was analyzed and simulated through finite difference method (FDM) in Matlab. Research on the impact of wire size, plate-to-plate distance, and wire-to-plate distance on the voltage-current characteristics was carried out. Finally, the correctness and effectiveness of the FDM was demonstrated by the experimental data, which provided valuable references for research on the sterilization principle of air purifiers and improvement of its performance.

The general law of the impact of changes in one weight or two neighboring weights on the shape of NURBS curve was summarized as well as the law of determining weights according to the shape of NURBS curve. Based on the existing research achievements, the characteristics of distorting the NUBRS curve to random directions by weights were discovered and proved. Furthermore, the calculation method of the corresponding weights or two neighboring weights according to the changes of the feature points on the revised cubic NUBRS curve was proposed too. In the situation of distorting cubic NURBS at the direction of non-controlling point, firstly, the ratio of the new curve's two neighboring weights was obtained by directly searching method, and then the weights were determined according to the weight calculation formula. Finally, examples were used to demonstrate that the proposed method agree with the reality well.

On the test platform of electric power steering systems, the control of AC servo motors was implemented by Matlab/Simulink and xPC. Based on the establishment of the lower-cost simulation system of double PC, the driving program for the PCI-1720 data card on xPC target toolboxs was developed. The experiment circuits were connected and the loading experiment of AC servo motors was carried out on the electric power steering test platform. The result shows that, the loading torque of AC servo motors under the control of xPC can change with the rotating angle, which meets the test goal of controlling the load of AC servo motors through double PC. The application range of xPC target toolbox is extended through the development of xPC driving program, and the communication between Matlab and hardware were enhanced．

Aiming at the problems that serious coupling existing in the double antennas of ground-penetrating radar may intensely impact the signal detection, a high-speed T/R switch system is developed. A series/shunt mode microstrip SPDT was made by using PIN diodes. By ADS simulation and parameter optimization, a SPDT with ultra-wide bandwidth and high isolation was achieved. The power supply and driving circuits were developed and the experiment results show that the switch system meets the requirements of ground-penetrating radars．

A strategy for synchronization control of thrust hydraulic system was proposed, which contained a PID controller for the synchronization control of the hydraulic cylinders between groups. Simulation result shows that it can meet the accuracy requirements of control in groups. The simulation analysis on the synchronization situation of the hydraulic cylinders pressure in the control area of the thrust system in the existing shield machine was carried out. And a coordinating control method for flow synchronization was presented. The simulation results show that flow synchronization can restrict the synchronization error within 3 mm. Finally the performance of pressure synchronization and flow synchronization was compared. The results showed that pressure synchronization performs well under slowlyvarying load, but for the load with sudden change, its synchronization was impacted greatly and the flow synchronization performs well under the load with sudden change but with energy loss.

The coordinate deviations between machining coordinates systems and workpiece coordinate systems can lead to a larger flank profile leakage. The online adjustment of the machining coordinates system can increase machining accuracy of scroll profiles. A novel rapid measurement system of machining error for scroll profiles was developed based on polar coordinates system and the centre point of the rotary stage can be adjusted accurately by an auto alignment table. The measurement errors of the proposed measurement system were analyzed and then removed. The machining error of the scroll profile was calculated by threedimensional particle swarm optimization. The measurement results of the new measurement system were the same as those of the CMM after compensating measurement system error and machining error. But the measurement time of the proposed measurement system was much shorter than that of the CMM. The measurement time and condition of the rapid measurement system can meet the requirement of the online measurement for scroll profiles．

The static interference method has better stability and realtime property than the traditional mechanical scanning method in laser spectrum analysis. A nonscanning spectrum analysis algorithm based on static Fourier transform spectrometer was developed, and the spectral analysis software was developed by C#. The experiment was carried out by using several kinds of lasers of 532, 660, 780, 850, 980 nm, the interference fringe was obtained by interfereing through the static Fourier spectrometer with a wedge angle of 0.1°. The interference fringes were collected by CameraLink M2CL-CCD detector and the spectrum information was gained from the proposed algorithm. Through the comparing between the spectrum data obtained from this algorithm with that from the Q8344A spectrometer on the Labview analysis platform, a similarity bigger than 95% was achieved combined with its error and sensitivity analysis．