Advanced Materials Research Vols. 102-104

Abstract: A new design method on showing motorcycle velocity and speed is introduced, which is controlled by P87LPC64 SCM and driven by VID66-08 CMOS chip. It consist of some module including SCM, sensor, velocity information unit, speed information unit, mileage information unit, mileage drive, double axis step-drive electromotor index show, LED show module. The system has some trait such as new exterior, low cost, hign precision, little error, direct show, micromation. Experiment result prove that the method is effective.

Abstract: Product knowledge reuse is more emphasized by discrete enterprises nowadays. But their small batches, multi-product, and high frequency new products development restricts them to reuse this. Analyze demands of knowledge reconfiguration in discrete enterprise. Propose a product feature based mathematical expression. Promote knowledge nodes of product-feature-model. Then use these models to fulfill KR process in KMS. Increase discrete enterprise’s adaptability and creativity in the nowadays rapidly changing-competitive business environment.

Abstract: In order to reduce the research and experimental cost of hand-picking machine, to make the design of manipulator more reasonable, and to provide more optimized program for the design, an agricultural picking manipulator simulation system based on intelligent design was designed. Firstly ,based on the research needs, to simplify the real picking manipulator under the premise of that the simulation accuracy reach the requirement, the model of picking manipulator had been simplified. Secondly, the finished model was put into EON Studio to build the virtual procedure, and movement properties were added to the manipulator to realize the function of motion simulation. Thirdly, the picking manipulator mathematics motion model of 4 freedoms was established, and the inverse kinematics of the picking manipulator was analyzed by MATLAB analysis tools, and the reverse solution program was written. Finally, Microsoft Visual C++ was used to complete the design of simulation platform, in order to realize the calling of various functions of the manipulator.

Abstract: The purpose of the present study is to propose a new technical method for improving the fatigue life of a panel with big grooves by setting rounded transition structure and stress relief slots in the vicinity of it. The main idea of the method is to reduce the stress concentration at the edges of rounded transition structure. To confirm the effectiveness of the method, analyses were performed by using software for two-dimensional elastic problems based on the body-force method. The calculation results show that the existence of stress relief slots effectively reduced the stress concentration at the edges of rounded transition structure. A close distance between the rounded transition structure and the stress relief groove resulted in a little influence of stress concentration at the edge of rounded transition structure. Also, a lower stress concentration was obtained by increasing the diameter and numbers of stress relief grooves. Results prove the effectiveness and certain engineering practicability of this method. The method is helpful for structure design.

Abstract: A new intelligent orthogonal optimization algorithm for robust design is proposed in order to improve accuracy and efficiency. The next searching direction and searching range of variables are determined by variance ratio after the robust optimization model is firstly calculated by design parameters on orthogonal array. New orthogonal array for further optimization is formed intelligently by analysis of variance ratio. The intelligent orthogonal optimization is performed until error value of each variable is equal to zero or is equivalent, which is the optimal robust solution. Correspondingly, the variable range corresponding to the minimum variance ratio in the orthogonal array in preceding step is the tolerance of the optimal robust solution, which means that there is no need for special tolerance design. This paper takes a cam profile as an example to perform robust design. The simulation results prove that the new intelligent algorithm for robust design has many advantages, such as less calculation time, higher speed, no exiting of prematurity of local circulation and slow convergence of global search.

Abstract: In order to eliminate thermal deformation of large-scale precise machine tools caused by ambient temperature change, self-alignment design principle and key points are proposed for a large-scale precise machine tools, Self-alignment simulation experiment, machined parts experiment and compared results for self-alignment rail grinder and other similar products are analysed, the present analysis show that self-alignment rail grinder has many advangtages of good precision, straightness stability.

Abstract: A novel orthogonal 5-DOF parallel manipulator was proposed, and the statics equations of the 5-DOF parallel manipulator were derived in closed forms based on its layout feature, then the statics transmission indices wer defined, and discussed in detail. It can provide theoretical base for the applications of the 5-DOF parallel machine tool. The novel 5-DOF parallel manipulator can be used as the precision platform in which the requirements for high stiffness, high accuracy and good technological efficiency.

Abstract: By utilizing the parallel axis theorem of moment of inertia and the graphic geometric transformation theory as well as the method of rotating and moving axis, the calculation formula of irregular objects’ centroid was derived. And on the basis of a single axis air bearing table which was used for measuring the moment of inertia of objects around a fixed axis, the complete instrument of measuring the irregular objects’ centroid was designed. The objects’ centroid and moment of inertia could be measured synchronously. Through the analysis of the influence on measuring accuracy caused by measuring factors’ errors, the method of improving the measuring accuracy of instrument was derived. The measuring instrument meets the requirement of measuring the irregular objects’ centroid precisely.

Abstract: In order to design the flow field of the NC-Electrochemical Machining (NC-ECM), a three-dimensional physical model of the flow passage is constructed based on the characteristic of the fluid flow, and three-dimensional flow field simulation is conducted with the applications of the Reynolds time-averaged Navier-Stokes equations and standard k- turbulence numerical model, velocity vectors on workpiece surface are calculated respectively based upon the three cathode outlet slots under the steady electrochemical machining condition. The present analysis show that electrolyte insufficiency appeared on workpiece surface for initial cathode flow field, and the experiment results verified the correctness of numerical simulation.

Abstract: In this paper, we discuss a novel approach to multimodal input design in Tangible User Interface (TUI). We present a prototype Bubble Journey, a game platform where users control the avatar in flash game by blowing a real handle. This computer game was combined multimodal input tool embedded sensor, which augment experience of user’s (children’s) five senses and body into game’s digital world with previous experience in daily life. Sensor embodied in multimodal input tool can convert data of sounds and movements produced by users (children) into digital signals to manipulate the virtual characters’ performance in the game.