Based on the entropy concept in information theory, by describing the current state of products through its module set, a method of representing complexity and uncertainty in product design through adaptable information entropy function was proposed. And then a new calculation formula for product adaptability based on adaptable information entropy was presented. Finally, two methods for calculating the adaptability respectively based on structure configuration graph and function structure graph was proposed. Research through illustrations indicates that this method performs well in operability and practicability and can be used in the practice of product design and development.

Taking into account the emotional demands of consumers is an important developing trend of product innovation design. Based on the investigation of related literatures, the concept of emotional design was presented. The primary research theories, including Kansei engineering and threelevel theory,emotion measurement and parameter conversion methods were emphatically reviewed. Meantime,the main research field of emotional research was divided into three parts: product model,function and culture, and the three parts were discussed. Finally, aiming at the development situation of innovation design and its relevant technology, the limits and future development trend of emotional design were outlined．

To plan product disassembly sequence efficiently, all feasible disassembly operations and subassemblies were firstly obtained by sub-assembly generation algorithms, and the disassembly operations was described by And/Or Graph (AOG). After simplifying the AOG, a Disassembly AOG (DAOG) which expressed all feasible disassembly sequences was constructed. To plan disassembly sequence based on DAOG, an extended-weight was brought forward to solve the uncertain weight problem of direct edges in the DAOG, and the formula of calculating extended-weight was also proposed. Finally, by cases study, the efficiency of DAOG for disassembly sequence expression and the feasibility and validity of DAOG for disassembly sequence planning were validated. The results show that the DAOG is an efficient method for disassembly sequence planning.

The complex system structure and multiple operation modes of complex equipment lead to the hardness to accurately calculate mean time to repair (MTTR) using conventional maintainability prediction model. After analyzing the characteristics of the complex equipment maintainability, a maintainability prediction model was presented, which took into account the disassembling order and the system failure modes. And then the multi-layer CPN model was established, and the MTTR was obtained by simulations. In the proposed CPN model, the control variables were defined, and the adaptability of the CPN model was guaranteed by parameterizing the input quantities. Finally, a case was simulated to demonstrate its feasibility．

Aiming at the problem that the large number of variables in design and manufacture of the oblique five-hinge joint-double toggle clamping unit of cup makers, hardness in its assembling, wide range of the variation of its functional objective value, the necessity and feasibility of its robust design was analyzed. An optimization model was established according to the analytical robust design theory, and the system variables were optimized to decrease the variation of the system objective value. Finally, the sensitivity matrix was calculated to indicate the relationship between sensitivity and every design system variable. The research results reveal that the critical angle, oblique angle and the size of forward-wrist pin, and backward-wrist pin are the most crucial to determine the quality of the system. It provides an objective basis on how to improve systems’ accuracy selectively, which can be employed in engineering practice.

In order to realize the control of exoskeleton, the distribution of the plantar pressure when people are in normal gait is required, due to which a durable and reliable exoskeleton foot is developed. By analyzing the existing ergometer-insole systems, a more reliable optimized scheme of putting three sensors on the proper positions was presented to measure the gait pressure accurately. The results of experiments show that the measurement of the plantar pressure in different gaits is more rapid and more accurate when wearing the boot and the tracking ability of the exoskeleton system is enhanced greatly. The conclusion can be used as a reference to guide the design and improved control of exoskeleton robots．

It is of profound significance to recycle automobile waste heat to heat automobiles and defrost their windshields. The exhaust heat exchanger is the most important part of water-exhaust heating systems. Aiming at their special operating requirements, a new kind of water-jacket tube type heat exchanger was proposed. Research on the heating performance of this type heat exchanger was carried out by numerical simulations and contrast experiments. The result shows that the proposed heat exchanger has a high heat exchange efficiency, and it can completely fulfill the demand of bus heating and defrosting in winter. However, it has a great effect on the exhaust back pressure under high working conditions, so it is necessary to add an exhaust by-pass control system．

A new controller for parallel ship motion simulator was developed based on Active Disturbance Rejection Control (ADRC) aiming at the feature that the simulator was multivariable, strong coupling, complex in structure and hard to obtain its explicit mathematical model.Using the parametric design method, a multi-domain simulation model, integrated mechanical, hydraulic and control systems, was established by Simulink. And then the method of parameter adjustment of the controller was presented.The results of simulations show the effectiveness of the simulation model and the control system．

To provide references for optimization design of the structure of flow passage components on sanitary centrifugal pumps, the numerical simulation of inner flow and parameterization analysis on the hydraulic performance of sanitary centrifugal pumps were carried out through CFD applications. The modeling method and simulation method on internal flow simulation were introduced. The distribution characteristics of the flow velocity and pressure in the pumps were analyzed, and the hydraulic performance of pumps was predicted based on the flow simulation. The simulation results agree well with the experimental results. The calculation results of the impact of the key structure parameters on the hydraulic performance of pumps indicate that the main parameters such as axial clearance of impeller, vane width and ratio of casing and impeller size have their optimum values. The results provide valuable references for structure and performance improvement of sanitary centrifugal pumps．

Based on the oscillating movement of S-start of strikes and startles in northern pike, the motion equations for S-start were established for the developed fish-like robot. Through the calculations of the fluid thrust, the boundary layer friction and the added mass in lengthwise direction, the propulsion efficiency of S-start was analyzed. By using the multi-step simulation experiments of strikes and startles of S-start, the underwater maneuverability performance indices such as kinetic energy, input power and propulsion efficiency were obtained, which provides theoretic reference for the experimental research and optimal design of the underwater maneuvering propulsion of fish-like robots．

Human step friction means the intermittent friction between foot and floor during people's walking, which directly affects people's walking safety. Slipping or falling may occur if the friction coefficient between foot and floor is too small. In order to sufficiently master the characteristics and law of human step friction, research progress was presented in terms of measuring apparatus, influence factors, wear principle and application field. Moreover, it was suggested that more efforts should be made on the research of human step friction on the condition of moving floor. The main testers applied to human step friction included Brungraber Mark II and biomechanical force plate. The main influencing factors were materials of friction couple, floor conditions, format and height of heels, movement parameters, groove of shoe sole and so on. The dominating wear forms were abrasive wear and fatigue wear. The human step friction was mainly applied to the fields of medical recovery, sports training, decoration and shoe making． The result shows that the mechnism of step friction should be researched sufficiently because that whether a person will slip during walking is decided and the quality of human life is influenced by the character of his (or her) step friction.

An EPS serial cutting approach based on STL projection profiles was proposed to solve the problems that EPS serial cutting data was hard to acquire and data of different angle profiles interfered each other. The proposed method acquired the profiles from STL models by directly slicing the STL model with a series of planes with the same distance. Then, the acquired projection profile from the STL model was treated by calculating the union of those profiles. Finally, a CNC controlled foam cutter was used to cut a real EPS model. The algorithm for calculating the union of profiles was discussed in details and the cutting accuracy was also briefly analyzed. The instance indicates that the proposed approach is stable, precise and efficient．

The tooth facial line of spiral bevel gears is the key geometric element in design and manufacture, and meantime it is one of the crucial considerations in design of spiral bevel gear machining tool. This paper began with the basic definition of pitch lines, and by combining the machining principle of Gleason spiral bevel gears; the pitch line equation of single spiral bevel gear was deduced. The conclusion that the pairing two pitch lines of spiral bevel gear contacted continuously during transmission was quantitatively proved.  It provides a method for researching contact track and contact state of spiral bevel gears.

By analyzing the reinforced sheet parts on a certain engine, the developed dimension is determined by calculation and related software. The working parts of cavity and punch dies for bending deforming were designed by CAE, and Mastercam is used to simulate their machining. The milling cutters and the parameters should be reasonably selected to achieve the optimal cutter moving route. Finally, the 2D video of their machining process with details were obtained and meantime the assembly drawing of the mould and drawings of the parts can also gained.