Applied Mechanics and Materials Vols. 201-202

Abstract: A new controlling system of fully automatic flat machine based on embedded technology is introduced in the paper. The computer is replaced by a 32 bits micro-processor and its expansions in the system, it downloads data that has been handled by the pattern preparing system, then sends the data to corresponding address of chips, in this way knitting is implemented. As an important part of the controlling system, the pattern preparing system provides programming interface to the users, and handles the work information in the users’ file. Work information is saved in the computer which is used as the server. Functions of every block, structure of software and data structure adopt of the pattern preparing system are described in detail.

Abstract: The dynamic characteristics of light-weighted structure are more important due to its flexible property. In this paper, the experiment of modal analysis for Motorman-HP20 robot is carried out. The method of one location for response and multi-locations for excitation are applied in the experiment. The orthogonal polynomials curve fitting method is used for modal parameters identification. The first six order modal parameters are obtained. The results show that the structure of L-shape arm may be re-designed due to the modal shapes due to severe vibration of L-shape arm in modal frequencies of some prior orders and the poor base frequency.

Abstract: In order to solve the problem about the tension detection of the multi-hoisting wire rope, this paper designs dynamic tension detection system of the multi-hoisting wire rope. The system can real-time detect the tension of rope, alarm to overload, imbalance and other security hazards during the operation, and guarantee the safe operation of the elevator. This paper designs a tension sensor for the hoist wire rope. The sensor uses the strain gauge as the measurement principle and the spoke as the flexible structure. It has the advantages of large measuring range, small size, anti-interference etc. At the same time, this paper adopts configuration software as detection system software. The software system includes the show of the rope tension and its force diagram, the simulation of hoisting state, and the alarm function to security hazards etc. It realizes online detection of the tension.

Abstract: The base frame of the truck-mounted crane was taken for an example, the collaborative simulation process based on the Pro/E and ANSYS Workbench software was put forward. Firstly, the collaborative scheme based on Pro/E and ANSYS Workbench was made; secondly, the model parametric extraction and the two-way transmission path of parameters between Pro/E and ANSYS Workbench were studied. The interface technology of model’s data was discussed; thirdly, the key technology of the implementation of analytic model was discussed. With the ANSYS Workbench, customization development technology of the collaborative simulation process was studied. Based on the method of customized script components, the support platform of customizing simulation of the base frame was built, which includes part’s simulation menu customized by XML language; simulation procedure controlled by Jscript language; interactive interface and input interface of model parameters and load parameters realized by HTML language. Thus, the parametric modeling and analysis of truck-mounted crane’s key parts were implemented automatically. The customization of collaborative simulation process provides important reference for the customization development of product parts.

Abstract: Flexible Flexible hinge is a typical flexible element in compliant mechanisms. Hooke hinge is a combination of the two revolute whose axis through the same point. It allows the two components have relative rotation of two degrees of freedom along the perpendicular axis. The distributed multi-reeds and large-deflection flexible Hooke hinge with the curve reed as the basic unit is analysed by finite element simulation, and is optimized in Multi-objective. The Hooke hinge after optimization lines with the basic rotation characteristics of Hooke hinge. It can provide the larger two-dimensional rotating schedule.It’s unilateral rotation angle can up to ±11.9 °, and the center drift and input coupling of rotation is small. So this flexible Hooke hinge is a new type of large deformation flexible Hook hinge which have excellent performance.

Abstract: Walking is an effective way of locomotion for the robot system; especially for the Hexapod robots, walking offers a better robustness for its redundancy of limbs. In order to enhance the adaptability of walking on unstructured terrain, a hexapod robot leg structure with the sensing ability has been developed. This structure is equipped with the 3-D force sensor at the tibia and the torque sensors at the first and second joint. The compliance control has been adopted to control the force of the foot end, and by combining with the real-time parameter estimation algorithm, the shape and stiffness can be updated to make the robot adapt to the mutative terrain better. Thus, the self-adaptively active compliance control for the hexapod robot leg has been realized, and the effectiveness of the controller has been verified through virtual simulation.

Abstract: Adopting the sliding average value method, curve model method in the analytic approach of the array of time, we have established a time series model of the analysis and forecasting model and given an application at Xiashan Reservoir dams which can monitor the safety of the dams. In this paper we firstly have introduced the relevant technical theory of the time series, including the methods, concepts, principles,and so on. Then we have created a time series forecasting model, and finally we apply the model to Xiashan Reservoir Dams. We have predicted the data of the coming year at the same time through historical monitoring data of the past three years.And we have verified the accuracy of prediction model and adjusted the related parameters.

Abstract: Underlying on the technologies of internet, network database and GIS, this paper presents the total solution of the development of the real-time monitoring and forecasting system model of urban air quality, which fulfils the requirements to low energy consumption and quick response and provides reference for similar project research.The paper systematically describes the system target,background of the development,running environment choice of the software, process of the development etc.Then it analyses function modules of the system.At last it gives the structures and implementation methods of the system’s database and the system security solution.This system not only can generate the state analysis reports and the early warning, but also can visualize the data analysing of the air quality by GIS.

Abstract: Injection molding is a major manufacturing method for the fabrication of plastic parts for multi-industrial aspects. The mold design technology experienced the development process of manual draft, 2D CAD design to 3D CAD design. In this paper, the main functions of EMX are introduced firstly. Then the design procedures are presented for molding parts by adopting Mold Cavity functional mould in Pro/E software and the mold base by using EMX software. At last, a mold for the mouse bottom cover is designed using the given method. The result shows that integrated 3D design of mold has significant advantages on reducing labor intensity, improving design efficiency and quality.

Abstract: In order to recognize the integrity of workpiece surface texture, this paper introduces the method of mended texture spectrum based on workpiece surface texture. The workpiece surface texture images can be described based on analyzing the influence of cutting parameters on the surface texture. The experimental results indicate that the cutting parameters have a great effect on the integrity of workpiece surface texture. In other words, the effect of cutting speed is evident, that of feed speed, depth of cut to a less extent. In addition, the integrity of texture changes greatly in short time with the increase of cutting parameters.