Advanced Materials Research Vols. 889-890

Abstract: It has been heavy work that to find the related pictures form Internet without annotation. Therefore, the automatic image annotation was extremely important in image retrieval. The traditional method were translated image visual feature into keywords simply, but it ignored the image similarity problem between the low-level visual features and high-level semantic. That is image "gap" problem, so image annotation was very lower. This paper puts forward a classification of web based image content automatic tagging mixing technology, the first it will map visual feature of image to one or more rough images, then we will preprocess the web page text information, finally we select some keywords similarity as image annotation by using similar semantic processing module. So it realizes the image and text combining the automatic annotation and it achieve high precision of image annotation.

Abstract: The paper presents a global path planning algorithm for AGV based on shapefile vectorgrath in order to meet the requirements of future manufacturing factory for automation and intelligentialize.The algorithm could distinguish different barriers but not just recognize there is a barrier or not. and the adoption of shapefile vectorgrath makes it possible not to rasterize the map or simplify the obstacles during the global path planning period. Simulation result shows the feasibility of the algorithm.

Abstract: A control system based on ARM and motion controller for arc welding machine is studied, and in the movement process, starting point and ending point detecting function are used in order to increase applied field of the system. In addition, process control module is incorporated into the system to save teach point and specify arc welding processing parameters including the speed, the weaving frequency and the amplitude of weaving and etc.

Abstract: Based on the characteristic that the change of the space posture will be a great influence on the error in the operating end when the articulated robot is used for cutting,in the case of the robot structure and the the cutting load in the operating end certain, based on the stiffness model of the robot system ,the paper makes the deformation of the operating end of the robot as the objective function with the genetic algorithms to optimize the space position of the operational mission of the robot, finally verify it with examples.

Abstract: A robotic additive manufacturing system of GMAW constrained by electromagnetism has been developed recently. In this paper, the work principle, functions and composition of this system are introduced. A metal part to be manufactured should be constructured three-dimension CAD model firstly, then the delamination process of three-dimension model is carried out. Furthermore, the forming path planning of additive manufacturing is performed and finally the part is fabricated layer-by-layer in virtue of GMAW process. The additive manufacturing system consists of the robot system, GMAW power, a device producing magnetic field, a linear laser system monitoring precision of the forming part, a digital measuring device monitoring forming temperature,central control system and software modules that support various functions. The functions of the additive manufacturing system comprise CAD model construction of parts, discretization of three-dimension model, forming path planning and GMAW deposition forming layer-by-layer, and etc. It is indicated that the exploitation of the additive manufacturing system will provide an effective way for the manufacturing of metal parts.

Abstract: For an industrial robots with unknown parameters, on the basis of preliminary measurement and data of the Cartesian and joints coordinates which are shown on the FlexPendant, the kinematic parameters is identified by using genetic algorithms and accurate kinematics modeling of the robot is established. Experimental data could prove the validity of this method.

Abstract: A robot automatic drilling system was established according to the processes of drilling CFRP on aircraft wings. Investigations were conducted to study the key technologies of this system. First, a surface-normal adjustment technology based on laser displacement sensors was developed. Then influnce of press foot pressure on hole precision was investigated. Based on the thrust force in CFRP drilling experiment, an empirical formula was established using binary linear regression analysis, proper processing parameters (spindle speed 12000rpm, axial feed 0.02mm/r) were determined. At last, experiment on tool wear was conducted to determine the cutter life. Results show that this system can increase the efficiency and quality of drilling CFRP on aircraft wings. The surface-normal accuracy is better than 0.5°, the aperture error is less than 0.02mm, the roundness error is less than 0.005mm, the surface roughness could achieve Ra3.2 and the efficiency is 5 holes per minute.

Abstract: A new signal extracting approach is proposed to diagnose the weak response signal in the on-line motoring of robot. Taking a 3-D manipulator robot as the research object, this method combines nonlinear stochastic resonance method with chaotic oscillator to dispose the sampling signal and filter out false odd multiple frequencies. The useful signal is obtained in the strong noise. The experiment results show the application value of the method.

Abstract: In view of the existing problems in manufacturing and repairing parts of single Equipment, this paper proposes a implementation scheme for digital alteration, and introduces the composition and principle of it, to achieve optimal maintenance technical scheme, the purpose of accurate maintenance, the maintenance quality assurance, and improving production efficiency.

Abstract: Through summarizing the quadruped walking style design quadruped robot, obtained using DH method analysis of the mechanism kinematics principle, designed for the continuity of the gait, and to add the 3 d model of constraint into ADAMS to verify, through the analysis of the displacement of the center of mass, joint torque, verify the rationality of the gait planning and meet the requirements for the selected motor.