Advanced Materials Research Vols. 538-541

Abstract: Using the second development tooling of NX/KF, joining the KBE system and back-propagation neural network (BPNN) algorithm, it can access the volume, weight, feature number and input the related parameters (contacting relationship number and total penalty value), predict the feasible assembly sequence, reduce assembly working time and production cost.

Abstract: In view of the problem of long period and low precision that generated by traditional prostate biopsy surgery at present, a special and miniature cartesian type robot for prostate biopsy was designed based on TRIZ theory, especially based on contradictory matrix and material-field analysis principle of TRIZ, therefore three-dimensional model of cartesian type robot of prostate biopsy was built, key components of the robot were designed by calculation .In conclusion the result indicates that the TRIZ theory can be applied to structural design of medical robot, and it also can solve the technical contradiction in design.

Abstract: This paper discusses about how to optimize design of an aerostatic bearing. In order to achieve the objective, there are four necessary qualifications: high load capacity, high stiffness, low flow rate and uniformly pressure distribution, those make an aerostatic bearing optimized. The finite difference method is employed to obtain the numerical solution of the pressure distribution between the surface of aerostatic bearing and worktable. The performance is determined by the pressure distribution of aerostatic bearing. Furthermore, this study proposed an integrated optimal approach that is HTGA/Gray. Comparing with many kinds of optimal theories finds out the most suitable parameters of an aerostatic bearing. Finally, the experimental results for the load capacities and flow rates clearly indicate that the proposed aerostatic bearing can enhance ability effectively.

Abstract: Abstract: Based on analyzing the influences of build direction on stair-stepping effect, supporting structure, efficiency, and deformation, etc., analytical hierarchical process (AHP) is introduced to make decision for build direction in layered manufacturing. The applications to optimizing the build direction of a computer mouse during prototyping show that the proposed method increases the rationality during decision making and improves quality and efficiency for the prototyping part.

Abstract: The design and adhibition of a new fashioned portable pneumatic cutting sampling machine used in the sap of the mine which use the compressed air as the source of power is introduced in this article and the problem of inefficient and large labour intensity which exist for a long time in the cutting sampling in the sap of the mine is solved in this article.

Abstract: After building the system structure model of materiel system reliability simulation based on Adaptive Agent, it emphasizes devising thinking on Adaptive Agent, which apperceives or responds change of system and environment and adjusts automatically failure generating algorithm, and provides devising thinking and reference on other Adaptive Agent in the frame, not only to simulate component action in the complex environment , then to mission environment-oriented reliability analysis for materiel system, establishes a better operational and current reference technology model.

Abstract: The very high accelerating gradient of the Compact LInear Collider (CLIC) design requires radio frequency (RF) structures, which operate in a performance range well beyond that found in any existing accelerator. Specifically, power generating structures (PETS), waveguide components and accelerating structures (AS) are being developed, and they have to work with an unprecedented combination of frequency (12 GHz), peak power (100 MW), pulse length (about 300 ns) and accelerating gradient (100 MV/m). Each accelerating structure contains about 30 copper disks, which form the accelerating cavity. The requirements of different technical systems, such as vacuum, cooling and alignment, have to be considered during the engineering design of a fully featured AS. This paper describes the engineering design method and fabrication of the fully featured AS for the CLIC study at CERN.

Abstract: Reverse processing parts has many ways, the use of edge detector and CNC machine tools on the part of data measurement, using Bluetooth technology to transfer data, using curve fitting method for data processing is a very practical method of reverse.

Abstract: The enemies pay much attention to the opponent significant bridge in modern war and future war. A number of long-span arch bridges are damaged by blast loading. According to the damage condition and damage assessment of long-span arch bridge subjected to blast loading, a variety of methods suitable for rush repair in wartime are summarized, the rationalization proposals of enhancing anti-blast ability of long-span arch bridge are proposed. The research work is meaningful for the rush repair of long-span arch bridge.

Abstract: Portable powered human exoskeleton is directed at providing necessary support and help for loaded legged locomotion. The kernel of whole mechanical construction of the exoskeleton is lower extremities. The lower extremities consist of exoskeleton thigh, exoskeleton shank, hydraulic cylinder and corresponding joints. In order to find the optimal combination of design parameters of lower extremities, an improved particle swarm optimization algorithm based on simulated annealing is proposed. To improve global and local search ability of the proposed approach, the inertia weight is varied over time, and jumping probability of simulated annealing is adopted in updating the position vector of particles. Experimental results show that the improved algorithm can obtain the optimal design solutions stably and effectively with less iteration compared to the standard particle swarm optimization and simulated annealing.