Analogy-based design (ABD) is a kind of method to apply design knowledge from other field into the target field and can enhance innovation efficiency effectively. From the respect of source knowledge, ABD was divided into three types that was based on man-made system, based on bionic system and based on rules. This paper focused on the second type and provided a formal method to describe biological and technical function based on general attribute and general operations. Two general characteristic sets of attribute and operation respectively were summarized, a computational method to measure the similar degree and a process to transform biological prototype into technical system were proposed. Lastly a new product called physical cooler, which was an instrument for measuring and cooling infant temperature, was taken as an example to further demonstrate the former method.

Product innovation includes three stages, fuzzy-front end, new product development and commercialization. The generation of innovative idea is a key step in the fuzzy-front end stage. In order to provide technical support for enterprises to develop products of new-market disruptive innovation (NDI), a process model of generating NDI ideas for fuzzy-front end was proposed according to the creating of new customers and their needs, and it transformed the passive design state into an active state. From the perspective of design-driven innovation, a method of classifying and analyzing the TRIZ resources in super system was provided, and the characteristics of the super-system resources were extracted and transformed, so as that a group of hypothetical customers or a certain hypothetical environment was created and three modes of generating NDI ideas were provided, and then the process model of generating innovative ideas was established. Finally, the generation of NDI ideas of automatic teller machine verified the efficiency of this approach.

Aiming at problems that there were many factors that had influence on the allocation and some of which were hard to analyze quantitatively in process of warship armaments reliability allocation, a method was proposed based on analytic hierarchy process (AHP), fuzzy comprehensive evaluation and interval analysis. This method employed fuzzy comprehensive evaluation to establish reliability allocation model of system, and designed a flow chart of reliability allocation; eight influence factors were considered, and relative quantitative methods were analyzed, and hierarchical model of reliability allocation was established by AHP. Fuzzy information was expressed by interval number instead of single value, and reliability data of similar products and expert estimation were applied to determine judgment matrix and weight of each influence factor, which achieved the combination of qualitative analysis and quantitative analysis. In all, the method had solved the uncertainty in process of reliability allocation for warship armaments. Finally, the application of this method in a warship power system indicated that the method was feasible and effective for the reliability allocation of warship armaments with good operation, and had a good practical significance in engineering.

A gripper and thrust hydraulic system was proposed based on the Hard Rock Tunnel Boring Machine (TBM) test rig to overcome the problem of high impact in the gripper system and pressure oscillation in the thrust system. Models of hydraulic system in AMESim were established. Pressure response of thrust system under random load was analyzed. The response of gripper system was compared under different diameters of orifice and back pressure values. The results indicated that the thrust system had accurate pressure control, and when the orifice diameter decreased from 3 to 1 mm the output force of piston rod in gripper system did not changed, the system shock mitigated, and the response time increased. Also, with the increasing of back pressure, output force reduced, speed of gripper stabilized and had little influence on pressure response. A system with low impact, stable speed and short response time was obtained when the orifice diameter was 1.5 mm and back pressure value was 7 MPa. The designed hydraulic system can damp the impact, obtain stable speed and shorten response time in gripper system, and realize accurate control of pressure in thrust system.

Taking the driving control system of oil boom uncoil and rewound for the ship carrying oil spill recovery machine as the research object, aiming at the problem of synchronous control of dual-motor speed synchronization, the electric-hydraulic proportional valve controlled motor speed synchronous scheme of master-slave based on PLC was proposed. The mathematical model of speed synchronous control system was established and the MATLAB/Simulink software was also used to analyze the stability, the output speed and the speed synchronization error. The PID unit had been introduced into this system for improving the stability and reducing the speed synchronization error. The simulation results showed that the stable performance was improved significantly, the motor output speed stability and the synchronization performance had satisfied design effect after the PID unit being introduced into the system. The synchronous control strategy of master-slave based on PLC is feasible when the demand of synchronous precision is not high.

In order to find out the dynamic characteristic of mine hydraulic hoisting machines' luffing mechanism then to provide a reference for a control and mechanism design of the luffing crane machine, a new type hydraulic mine luffing hoisting machine was studied. Based on the system computation of the luffing crane mechanism on certain working condition, dynamic simulation analysis of luffing mechanism was carried out with ADAMS and equivalent element method. The results showed that angular velocity of lifting arm was stable in initial process of hoisting process, but with the increasing of luffing hydraulic cylinders' drive force, the jump value would suddenly change at some point, and affect the lifting stability. According to this problem, the MATLAB curve fitting function was used to calculate the driving function, then the uniform amplitude driving correction function was developed, through which the start time of angular velocity jumping was delayed and the value reduced as well. At the same time, dangerous working condition was gained through dynamic simulation analysis of luffing cylinder driving force, through which the optimization design of hoisting machine could be more targeted. The method of study can provide a reference for design and optimization of mine hydraulic luffing crane machine.

Considering the travel inconvenience that the elderly or disabled persons were facing, a multifunctional walking assistant robot for both stair climbing and plaint moving was putting forward, which adopted the foot and wheel patterned structure. The kinematic model was established by R. Morales method, with which the trajectories of robot’s center of mass and joint angles during the ascending process were calculated. The dynamic model was established by means of Roberson-Wittenburg method, and the driving torque of each joint was calculated by taking inverse kinematics solutions into the dynamic model. A virtual prototype was developed in ADAMS for kinematic and dynamic simulations. To validate the feasibility of the design and the correctness of the theoretical inference, the simulation results of the trajectory of robot’s center of mass and the joint driving torques were compared to the results of MATLAB.

To develop theoretical instructions for vibration suppression design of damped plates, a topology optimization method for the plates was presented. Firstly, a dynamic equation for a plate was proposed and a FEM solution to the equation was given, so that the plate's modal ratio model could be derived. Then, oriented to maximizing multiple modes' damping ratios, and aimed to make use of damping materials as less as possible and to remain the plate's modal frequency basically unchanged as well, a topology optimization model was built for the plate. Moreover, the modal damping ratio sensitivity was derived, and evolutionary method was employed to solve the optimization model, which used weighted mean of modal ratio sensitivity to determine the elements' deletion, so as to avoid checkerboard layout of damping materials in optimization. Finally, a program was accomplished for optimization, so that simulations could be executed on a quadrilateral plate, which validated the optimization method proposed well. Simulations show that a damping plate can obtain better vibration suppression effects, as long as the damping materials distribution on the plate can make multi-mode damping ratio maximize.

In order to study the effect of variable winding velocity caused by the zigzag-shaped groove drum on lifting system dynamics, the dynamic model of lifting system with the excitation of variable winding velocity was established. With a lifting system of 40 t container crane as the research object, motion trace equation of the zigzag-shaped groove drum was deducted for ideal winding process to simulate the winding velocity, and analyzed the dynamics of lifting system during acceleration, constant speed, deceleration and stop stage. The displacement response of lifting system and time history of wire rope tension was obtained, and dynamic load coefficient under different phase positions of helix part and amplitudes of variation were calculated. The results showed that drum winding velocity of variation cannot be ignored. The changing trend of wire rope tension was the same with the displacement of the end part at crane's boom, and the high frequency part of tension resulted from the variation of winding velocity. As the phase position of helix part and amplitudes of velocity variation increased, not only the fluctuation amplitude of wire rope tension increased, but also the dynamic load coefficients at different stage became bigger. And the stage that had the max dynamic load coefficient changed from acceleration stage to constant speed stage. The research results lay a foundation for dynamic performance optimizing and reliability design of lifting system of container crane.

Considering the working principle of hydraulic-walking  advanced support equipment, and advanced support during the transition phase in the falling process of actual work, in order to reduce the disturbance when forepoling equipment falling on roof, based on volume average release rule, the relationship between displacement of proportional throttle and time of frame descending process was studied, so as to determine the suitable spool displacement control curve of advanced supported frame descending process. In order to verify the performance of the control methods, it was compared with the straight line, exponential and logarithm curve control methods, and made theoretical analysis and experimental study on its effect. Analysis and experimental results showed that, the control method which was based on volume average release rule could effectively and smoothly unload the support force during the advanced supported frame descending process, achieve the best control effect during the same period of decending, with minimal impact on the roof disturbance, compared with other control methods. This control method provided the theoretical basis for advanced supporting equipments' development and its control strategy research.

The scheme evaluation of mountain railway location design has the characteristic that it has many qualitative indexes. The traditional evaluation methods have not fully taken the uncertainty characteristics of qualitative indexes into account, and it also lacks of appropriate evaluation methods when qualitative indicators and quantitative indicators cross with each other. Firstly, the advantages of the cloud model in describing uncertain information were used to improve the traditional AHP. Combined with deviation method, the subjective weight and objective weight of index were calculated respectively. Through a new weighted fusion mode, the combination weight was formed. Then, according to the principle of uncertain reasoning of cloud model, an effective quantification of qualitative indexes was achieved by using the cloud generator based on the evaluation about qualitative index made by experts using linguistic variables. Finally, the projection method was introduced to select the optimal scheme. Therefore, a new model of comprehensive scheme evaluation which contained both quantitative and qualitative indexes was proposed, and an example of local alignment scheme comparison was used to illustrate its feasibility and practicability. It provides a new idea and method for the scheme evaluation of railway location design in mountains.

In existing gear longitudinal vibration system, the amplitudes of gear and horn are small at the connection site, so the output amplitude of gear is small and cannot meet the requirement of gear ultrasonic machining. Based on non-resonant design theory and whole resonant design theory, a new gear longitudinal vibration system, which consisted of a coupling vibration unit of gear and cylinder rod, a half-wavelength cone horn and a transducer, was designed. The amplitudes of gear and horn were large at the connection site of this new system, and the output amplitude of gear was increased as well. When the parameters of cone horn were certain, the diameters of gear and cylinder rod made no influence on the output amplitude of gear. However, the smaller the diameter of the small-end cone horn was, the larger the output amplitude of gear was. The feasibility and effectiveness of this new design method was verified by finite element analysis and resonant vibration experiment. A new design method for gear vibration system is provided which has important significance to the engineering application of gear ultrasonic machining.

There are problems of that the roof fall accidents of full-mechanized excavation head-on roadway take place frequently and the tunneling efficiency is low, supporting force of stepping-type advanced supporting equipment is instability and may damage roof during the transition process. In order to meet the requirements of stability, efficient and reliability for supporting the head-on roof, also to achieve the purpose of stepping-type advanced supporting equipment in the transition process to form an effective support, the electro-hydraulic proportional control technology was used and control scheme of supporting force of main and auxiliary cylinder groups was designed. Using spool displacement of the direction valve to control supporting force of cylinder groups, according to the components and principles of the system, the mathematical model and simulation model of control system was established. AMESim software was used for system simulation study, the control curve about spool displacement of proportional valve and supporting force with time were obtained. Simulation results showed that different control effects on different spool control curve were obviously different. The control curve based on volume increment was confirm to the requirements of the actual working conditions. In the meantime, the design of control system was reasonable by comparing the simulation data and the experimental results.

An analytical method for the out-of-plane buckling of the crane jib with auxiliary bracing was proposed. The analytical expression of the out-of-plane buckling characteristic equation was obtained by establishing the bending deflection differential equation of jib. The boundary conditions and deformation compatibility equations were introduced to obtain undetermined constants. The calculated results agreed well with that from ANSYS. The degeneration forms of the characteristic equation were explored to the single rod's frame and the double rods' frame. The buckling loads of the jib with auxiliary bracing, the jibs with single rod and with double rods were compared. The result showed that the buckling load of the jib with auxiliary bracing was between the single rod's frame and the double rods' frame, and the necessity of the auxiliary bracing was discussed.

Wave spring is one of the most important parts in the motor for vibration reduction. Perfect wave spring can substantially reduce the vibration of the normal running motor which extends the life of the motor. In order to design the wave spring which met the specifications from customer, finite element analysis method was used to simulate the wave spring pressure process. The characteristic of load-deflection curve was studied and three obvious inflection points were found. The relationship between these three inflection points and the stress diagram and theoretical formula of corresponding compressed wave spring was studied to find out the reason of why inflection points appeared in the load-deflection curve and modified the geometry parameters of wave spring according to the differences between the load-deflection curve and customer's specifications. Finite element analysis would be carried out again according to the new model until the load-deflection curve fitted the customer's specifications. At last, the load-deflection curve of the last model was compared with curve generated by test to identify the reliability of finite element analysis method in the design of wave spring. The experimental results matched very well with the finite element analysis load-deflection curve which proved the effectiveness of the finite element analysis method in the design of wave spring.