As an important analysis tool in TRIZ, substance-field analysis plays a significant role in the process of problem-solving using TRIZ, but since its substance-field model can't describe the function of the system well, the TOP function model which evolves from the substance-field analysis was regarded as the foundation of TOP function analysis, and the ideal way was proposed as its solution. Substance-field analysis and TOP function analysis are utilized respectively to solve the problems in research on the centrifugal gas compressor bearing, and superiority of TOP function analysis is displayed and it may play a significant role in TRIZ analysis．

 Aiming at the analysis requirements of human-machine interface of mechanical system in dynamic environment, by adopting the method of combining human-body dynamic model and human-body vibration experiment, research on human-body vibration characteristics of human-machine system in dynamic environments was carried out and simulated. According to multi-body dynamics, a vertical vibration model with 5-DOF for a seated body was established. The curve of transfer function （the curve of frequency response function） was obtained by human body vibration experiment. Adopting system identifying method, the dynamic parameters of human body （equivalent quality, equivalent stiffness and equivalent damping） were obtained. On such basis, with the simulation analysis on human body vibration model by MATLAB/Bode, the vibration character of human segments （frequency response） was concluded. Furthermore, with human body vibration simulation by ADAMS/Vibration software system, it was verified that the results of human body vibration character of 5-DOF human model are effective. The research results are valuable to analyze human dynamic response of human-vehicle system. And they can also provide a significant reference for human-machine interface design in mechanical system and a guidance to evaluate comfort of human body dynamic response of human-machine．

 Tolerance is very important for the seamless integration of CAD and CAM. How to correctly interpret tolerance semantics is a key problem.A mathematical representation method for the straight line is given based on the variation of degree of freedom （DOF）by integrating the concepts of DOF and variation. And then, a new classification method of straight line is proposed according to its orientation with respect to the whole part. Furthermore, research on the detailed constraint mode of different types of straight lines is done and the mathematical model for dimensional tolerance of straight line is systematically deduced. With the model, the semantics of the dimensional tolerance is exactly represented and interpreted under different constraint modes．

 Reliability optimization of complex system is a typical NP-hard problem. Without taking into account the system's specific connecting form, by regarding every component as one level and the generated random data as network nodes, ant colony optimization （ACO） was successfully adopted to the mentioned optimization problem to search the optimal solution which could not be obtained by other algorithms. The simulation results indicate that ACO can find the optimal solution more quickly. Like other heuristic algorithms, ACO can also overcome the problem of computation complexity of combination optimization effectively．

In order to improve the ride comfort of the vehicle independently developed by Hunan University, by comprehensively considering the influence of damping coefficients, suspension stiffness and unsprung mass on ride comfort, by adopting ADAMS/View, the simulation analysis model of air suspension and the whole vehicle was established. Then the irregularity sample of road spectrum needed in simulation analysis was constructed and the sensitivity analysis on the parameters which influence the vehicle safety, ride quality and ride comfort was carried out, on the basis of which, optimization on air suspension parameters was conducted. By comparing the result of vehicle road experiment with that of simulation, reliability and feasibility of simulation is validated．

Permanent magnetic （PM） gear is a new type of magnetic transmission mechanism. There is no direct contact between the driving wheel and the driven wheel, and it transfers torque and power through magnetic force generated by the coupling magnetic fields. To study its transmission characteristics, analysis and calculation of the magnetic field of PM gear was carried out, and then the FEM software ANSYS was utilized to simulate its induction line and induction intensity at different torque-angles. And finally the torque angle characteristic curve of PM gear was obtained. The torque angle characteristics and mesh ratio at low speed was validated through experiments．

 Sandwich structure with aluminum foam core was applied in large-shock-energy absorption device and its design method and steps were presented. A new protecting device of free-sliding in skew mine which could absorb 2.232 MJ energy was developed. Crashing simulation analysis on this device by LS/DYNA found that aluminum foam was steamed roller layer by layer and had good performance in absorbing energy. During the shock process, instant energyabsorption velocity would increase with the aggravation of aluminum foam core deformation and the enhancement of structure strength, and the conglutination of sandwich structure was broken．

Based on Paris-Erdogan crack propagation model, the probabilistic perturbation method and Edgeworth series technique are employed to argue the reliability of a turbine disk with arbitrary distribution parameters when given the first four moment of basic random variables. The fatigue life model of turbine disk is established and the reliability of turbine disk crack propagation life is obtained. The result from the calculation model is close to the one from MonteCarlo simulation. Therefore the result is a valuable reference for reliability design of turbine disk.

A new design method for large cross-section ultrasonic plastic welding block horns with slots was presented and experimental validation on it was carried out. Firstly, the block horns are reasonably divided into some units, and then these units were compared with half wavelength block resonator with constant cross-section. By adopting the concept of equivalent mechanical impedance, the frequency equation of the mentioned horn element unit was obtained and meanwhile the influence of coupled vibration was taken into account. Finally, by utilizing this equation, the influence of the number of slots, their width and length on vibrating characteristics of horn were analyzed. In light of this design method, several groups of the target block horns are manufactured and the results indicate that the resonant frequency well agrees with the theoretic one.

 Research on nonlinear dynamic response of passive vibration isolator, which was excited by foundation vibration and isolated by viscoelastic material was done. Nonlinear stiffness was expressed by the cubic polynomial function of deformation and nonlinear damping was characterized by viscoelastic fractional derivative operator. Then the fractional derivative nonlinear dynamic equation of passive vibration isolator was established. The dynamic response characteristics were analyzed by harmonic balance method and the frequency response equatioin and amplitudefrequency curve were obtained, and furthermore, the influence of nonlinearity on system was analyzed. Finally, the stability and the stable interval of the periodic solution were argued by the Floquet theory. The results indicate that the proposed equation can precisely describe the dynamic characteristics of viscoelastic vibration isolator. The ignorance of nonlinearity of stiffness and damping will result in obvious error. The proposed method provides theoretic reference for design of viscoelastic isolator and the evaluation of its effect.

Substrate preheating could significantly decrease the thermal stress during LMDS processing, and thereby inhibiting the generation of cracks. However, the level of substrate preheating temperature had an important impact on the microstructures of the forming parts, and it was of great importance for the choice of substrate preheating temperature to understand the effects of substrate preheating temperature on microstructures. Through the LMDS system and substrate preheating system constructed and developed successfully by Shenyang Institute of Automation, Chinese Academy of Sciences, LMDS experiments without substrate preheating or under the preheating temperature of 200, 300, 400, 500, 600 ℃ were carried out with Ni60A separately. By using scanning electron microscopy and energy scattering spectrometer, deep research on microstructures of the shaped parts were carried out. The regularities of the effects of different substrate preheating temperature on the microstructures of those parts formed by LMDS are obtained, and they can provide the important references for optimization and choice of substrate preheating temperature．

The changing process of gas-collector pressure in coke furnace has the features of strong couple, time-variation, nonlinearity and uncertainty. The process flow and system structure of pressure control were presented and the mathematic model of the mentioned changing process was established by experimental method, which had higher model credibility than other methods. The producing process and experimental establishment could progress simultaneously and the automation of mathematic model establishment was realized. The implementation of completely decoupling algorithm, online modification of model parameters played a key role in improving regulating quality. Finally the DCS network structure to realize this process was proposed. The results indicate that this regulator has stable performance and good robustness.

 According to the calibrating requirements of force sensor on friction vehicle, a calibrating method for runway friction vehicle was proposed and the calibrating principle and method was analyzed. PC104 module was selected as the control core to complete calibrating experiments. Aiming at the nonlinearity of force sensor, the segment least square（LSQ） was adopted to fit data and the results of experiment validated its efficiency.

In order to enhance the signal to noise ratio （SNR） of fundamental ultrasonic echo signal for ultrasonic nondestructive testing （UNDT） and ultrasonic nondestructive evaluation （UNDE）, a new denoising technique for ultrasonic signal based on lifting wavelet transform multi-resolution analysis was presented. On the basis of the analysis of shortcomings and principle of classical split spectrum （SSP） algorithm, original ultrasonic echo signals were decomposed into sub-bands through the proposed technique and then the noise was eliminated according to some signal and noise separating rule, which realized the aim of enhancing SNR. The experiment results indicate that the presented technique has high stability in denoising and increases the SNR of ultrasonic target echo signals．

 Based on the analysis of the valve setting‘s restriction characteristics of shock absorbers, arithmetic model of damping characteristics at low speed was established. The restriction characteristics of orifice disc were analyzed by adopting small clearance restriction theory and then the main parameters affecting the low velocity damper characteristics were determined. By simplifying the small clearance space equal to a pinhole, one result was obtained and then it was compared to the results obtained from experiments, which demonstrated the correctness and preciseness of this method．