This paper analyzes principles and structures of various kinds of hydraulic systems of excavator with the help of the methods of construction design, and a new type of bypass channel control valve was designed to realize an unique hydraulic system of excavate robot, with which various kinds of hydraulic systems such as constant flow control, summation horse power control, negative control, positive control, and load sensing control systems may be achieved flexibly with simple structure and regulation. Several new types of energy saving control and intelligent control strategies of excavator have also been developed with the help of the flexible hydraulic system of the excavator robot that has been mentioned.

 Technology markets are international markets. It is described how patent data can be used to compare an enterprise' s technological level with the general international level. In addition, we discuss ways of identifying future competitors and calculating market perspectives on the basis of patent information.

 The close cooperation of mechanics, electronics, control engineering and software contains considerable chances of succsess for mechanical engineering and corresponding branches. On the one hand the cost-benefit ration of known products can grow considerably. On the other hand completely new products become possible. The following paper presents the basics of a new method specifying principle solutions of mechatronic systems in an integrated semi-formal manner according to [1]. Thus an important presupposition for the coorperation of the technical domains involved is established in the early stage“conceptional design”of the design process.

 Described are individual solutions with hallsensors, optical sensors and with sensor signals from present components and problems by residual current operated devices.

 According to structure size, working environment and using demand of certain type rocket depth bomb' s launcher, by using mechanical innovation design theory, the automatic setting device of depth bomb' s fuse is separated into power module, transmission module, execution module and safe-assisting module in terms of its function. By seeking kinematic solution of each module, the innovation design plan of the automatic setting mechanism has been synthesized.Based on the concrete design demands, the geometric parameters of the mechanism' s every section also have been determined by optimization. The sample machine, which is made according to the design plan and results mentioned above, can satisfy the design demands completely, has passed feasibility argumentation organized by Navy.

 Although PDM(product data management) technique has many advantages in engineering application, there are many difficulties when realizing them. The paper researches the strategy to implement PDM technique in the Boiler CAD Application System, which is one of the domestic CAD engineering application demonstration projects in the national Ninth Five Year period. And with the successful actualization of management sub-system in the system, we discuss its architecture, frame and organization in design proceeding so as to manage the on-line data and off-line data separated. The database structure is introduced also.

 Three kinds of variational geometric constraints (VGCs) are presented based on TTRS theory. On the basis of the assembly information in CAD, mate tree is uniquely defined. The properties of mate tree are analyzed. Mate trees are linked by cross-referenced VGC to generate loop circuit (LC). Based on mate tree, the generation scheme of loop circuit and 3D assembly tolerance chains is put forth. A simple example is analyzed to show the scheme to be effective.

 Modern manufacturing technology has some new requirements for inspection system such as high precision,automation,flexible structure,100 percent online inspection and so on. According to the new requirements,a novel inspection system was designed based on 5-DOF virtual axis machine with three legs. This paper analyzes the structure and characters of this kind of virtual axis machine and introduces its kinematics model and the numerical control system .The main parts of software design for inspection system are given. Using commercial CAM software, this paper gives the inspection planning method and submits the inspection requests through Gcode file. According to the motion control card, the program for inspection control and G-code interpretion is finished. This paper makes use of the characters of virtual axis machine, extends its use and explores a new method to adapt to the new requirements for design of new inspection system and process.

 As usual, the numerical computation of structural reanalysis is the main task in the optimal procedure of the structures. The number of structural reanalysis should be reduced to raise optimum efficiency, which is achieved by a approximate reanalysis method named“behaviour model technique”. The method makes the number of structural reanalysis to be linear with the design variables. In addition, the thickness distribution of thin plate optimization, offered in other researches, is of stepped shape, not smoothed. In this paper, the continuous thickness distribution can be obtained after optimization by use of virtual laminated element, as is more reasonable. The following classical examples will be offered to demonstrate the efficiency and practicality of the method presented.

 A finite element method for membrane structures form finding is formulated. Its validity is proved in a practical project. And some useful experiences in form finding, such as how to set the initial stress of membrane structures and how to set the Young' s modulus, are gained.

 A redundancy optimization model is given. Many optimization methods to solve optimum model and their advantages and shortages are analyzed. A genetic algorithm is put forward comparing with heuristic method, and its effectiveness is illustrated through result. The initial value of genetic algorithm was discussed also.

 The concept and feature of green design are put forward, the assessment index system based on the green design are given and discussed for engineering vehicle.

 We investigated the impact of interaction of downstream rotor blade row with upstream guided vane row, i.e., interactions of wake and potential flow field, in a single stage axial flow compressor, on vibrations of rotor blades due to the unsteady flow induced by the interaction. With the help of FEM, numerical simulations have been carried out with some correlated factors, such as the geometry of vane profile, the number of guided vanes and so on, in affecting dynamic stress distributions in the rotor blades. An approximate method was given out to compute unsteady flow forces, acting on the rotor blades for compressor designers. Finally, dynamic stress distribution diagrams were illustrated for an example case. The comparison between the computed results and the measurement qualitatively came closer. Some useful conclusions have been obtained.

“Graphical Representation of Program”is a technique of great potentiality and application. It has been under wide research internationally for the purpose of improving the readability of programs. the SI-NS diagram, is both diagram and program. It enjoys more advantages comparing with the PAD of Japan, NS of Germany and CSD of the United States, and has been validated during long term of software development and education. I hope this technique will draw the attention and recognition from the software and other relative fields at home and abroad.