Applied Mechanics and Materials Vols. 121-126

Abstract: 3D scanning probe is a kind of measuring instrument that is an indispensable part of Gear Measuring Center. It’s used for obtaining micro-displacement in three directions through the deformation of the three mutually vertical parallel springs. The accuracy of the probe system has critical influence on Gear Measuring Center. Because of the limitation of the structure of parallel spring, the installation errors of the probe and the influence of environmental factors, the parallel springs in three directions are not always strictly vertical, the interference and coupling among X,Y,Z directions exist. This problem is very difficult to be solved by adjusting the mechanical structure of 3D scanning probe system. However, the accuracy of probe system can be improved by adopting software-compensation through calibration. In the paper, the calibration matrix of the probe system is generated by fitting the points sampled on the standard ball with the method of the least square. The points are sampled through controlling the probe to touch standard ball in several given directions. The experimental results show that the measurement errors caused by the coupling among the three perpendicular directions can be effectively decreased by the coefficient matrix mentioned above. The method of calibration is practical and effective for improving the measurement accuracy of 3D scanning probe.

Abstract: Based on 3D design software and taking the design of automobile driver seat for instance, this paper studies the secondary development technology and writes general program of historytree. It forms image database through parts historytree query, re-construct tree-view control by data, and updates parts.

Abstract: It is of importance to analyze relations between Hawkins' T2H statistic and process variables mean and variance. The formula of T2H statistic mean is derived, and its variation law with process variable mean and variance is investigated. Simulation data indicates that the variation law of T2H is similar to SPE. Changing of process variable mean and variance can both enlarge T2H, while process noise can make the statistic oscillating.

Abstract: By comparing and analyzing various orders coefficient curves of fractional order, this article studies the influence of order to the extraction of signal memory information, and then extends the result to image processing, as well as analyzes the influence of fractional order differential order to texture information extraction, then gives the order scope of texture information extraction.

Abstract: The flow differential equation for Magneto-rheological (MR) fluids in annular channels of MR fluid shock absorber is set up and several rational simplifications are made. Analytical shear stress profiles of MR fluids through annular channels are obtained via solution of the flow differential equation. An analytical study on MR fluid shock absorber is present employing shear stress profiles. Both boundary conditions and compatible conditions are established. Both flow velocity profiles and total volumetric flow rate are developed by integration by parts and numerical integration. The prediction method for damping force of MR fluid shock absorber is developed via simultaneous equations. The analytical study on MR fluid shock absorber is validated by means of reformative Herschel–Bulkley constitutive model, in which flow velocity profiles and flow regions boundary radii are drawed. A MR fluid shock absorber, which is designed and fabricated in Chongqing University, is tested by electro-hydraulic servo vibrator in National Center for Test and Supervision of Coach Quality. The experimental results reveal that the methodology is able to predict damping force of MR fluid shock absorber via shear rate profiles and experimental damping forces are in good agreement with analytical those.

Abstract: with the deepening of opening up, overseas capital operation has become an inevitable choice for Chinese enterprises, and also an important way to gain new development opportunities. In the process of overseas capital operations, the Chinese enterprises should carefully select the corresponding operation modes according to their own characteristics, pay great attention to the choice of foreign partners and target assets, and adhere to the principle of diversified regional distribution.

Abstract: This paper presents a practical method for engineering test on the base of mechanical eccentricity principle, and a new vibration test equipment for testing the quality of pavement is designed. A sensor was installed on the exciting bar for measuring the exciting force and frequency which generated by the equipment. The mechanical performance could be detected according to the deformation of object. The equipment has the merits such as small volume, light weight and compact conformation. It can be used not only in laboratorybut also in field and has great practical value.

Abstract: Functional design is an important method for problem-solving and high-level innovation, and function innovation is the front end of functional design. Sustainable function innovation is a practical and innovative way to solve the issue of sustainability. Based on the concept of front-end prevention, functional design and sustainable design are integrated. The key enabling technologies for sustainable function innovation (function evolution, function combination and function failure) are studied, and then systematic functional design process is built from function innovation angle. Integrated systematic functional design, the innovative process model for sustainable innovation is introduced. A innovative design example of continuous source for CdTe deposition on a glass sheet substrate demonstrates the proposed model and theory is feasible

Abstract: Aiming at questions of accurate detection of experimental installation’s angle is difficulty like rotating platform, which designs the angle inspection control system adopting incremental photoelectric encoder and PLC. Using gear mechanism and magnified angle pulse of electrical fourfold frequency circuit, switching in biphasic high-speed interfaces of PLC and being displayed on panel calculated by PLC, or achieving to correct the output pulse of motor driving with setting angle value. With experiments testing, the system of inspection and control has advantages of simple construction and angle inspected accuracy of 0.0225°, which satisfying the demands of angle accurate inspection and control of experimental installation.

Abstract: In order to improve the automatic level of teaching management in experiment and training base, a teaching management system is designed and implemented. The teaching process such as checking on work attendance, logging on school reports and equipments’ management can be carried automatically. The efficiency and the management level can be increased, and the resource sharing can be realized. to meet this demand. The use of numerical control experiment and training management system will improve the level of teaching and management of our training base.