Advanced Materials Research Vols. 989-994

Abstract: In the research and development of the precise closed-loop control system in large hydraulic press, the touch screen and PLC are frequently applied to design, debug and test for the system. Though a better closed-loop control characteristic can be acquired after repeated testing by this way, the comprehensive state data of hydraulic press are unable to get, which leads to a long research cycle and also restricts the maintenance and upgrade with the equipment in the later period. In order to obtain the whole state information of hydraulic press easily and effectively, a monitor system of precise closed-loop control in large hydraulic press is designed. Based on reasonable cooperation of sensors and high-speed data-acquisition card, high-speed and precise signal acquisition is realized. In addition, data-acquisition software program is designed base on LabVIEW, it can achieve the functions of collecting, storing, displaying and analyzing data. Through the real measuring and analyzing on a certain large ceramic hydraulic press, the status of key parameters can be acquired effectively during the whole pressing process. So the monitoring system supplies the significant data basis to the precise closed-loop control, accelerates the design and development of high characteristic precise closed-loop control and also strongly supports to the maintenance and upgrade with the equipments in the later period.

Abstract: Further excavation is extraordinary significant to the sustainable development of mine. For the rock slope, three-dimensional geostress in the deep mining area are presented complex and high, which were caused by previous excavation. Also, it is important to obtain the accurate geostress in mining area, which is the necessary precondition for determining the remaining ore mining scheme and the slope stability. In this paper, based on the in-situ geostress monitoring date, a 3D numerical model alongside the physical dimensions was built in finite element software FLAC3D, to accept the constitutive parameter and monitoring data, to predict the 3D stress and displacement distributions and detail failure information, to estimate stability of mining area.

Abstract: In this paper, a new analysis model to assess the structure seismic capability is established, using improved capacity spectrum method. The model can solve the problem of many unknown and big computation workload in the process of conventional Pushover analysis. Conventional Pushover is very complex when use in the analysis of structure dynamic problem and nonlinear problem, the new model can solve these problem.

Abstract: The high voltage transmission lines exposed for a long time are often broken down, thus, The manipulator arm of robot in the hot line was designed, The design is reasonable through kinematical analysis. First, make sure of the connecting rod coordinates and the connecting rod's D-H parameters. Matlab was used to draw 3D model of manipulator. Use functions in the Robotics Toolbox to solve kinematics analysis.

Abstract: According to the signal processing unit in aerospace measurement and control system between the flow of water features, this paper proposes a software suitable for aerospace measurement and control system of driving mechanism. This paper first introduces the basic structure of aerospace measurement and control system software, having studied the static and dynamic data stream driving mechanism on the basis of detailed discusses the design and implementation process of this kind of driving mechanism of data stream. It adopts the method of message control, according to the dynamic data flow driven mechanism, realize the process of the signal processing unit and each signal processing unit between the data flow between the internal thread. Compared the same sort of dynamic data stream driving mechanism, the drive mechanism possesses the advantages of flexibility and easy to implement.

Abstract: In the paper, the connecting rod production line in one workshop is taken as the research object. The workshop layout is designed by SLP algorithm. The specific work includes dividing the operating units, quantifying logistics relations and non-logistics relations, determining the importance of proportion and the integrated relationship of activities that based on the actual situation of the workshop, and then getting the plan finally. The Witness simulation is applied to simulate the theoretical analysis results and imitate the production logistics situation of the factory. Finally, the optimization scheme is determined by the comparison of several schemes in the aspects of logistics and the number of back flow.

Abstract: This paper presents an implementation of voltage measuring system in a battery manage system, which is based on micro-controller AT90CAN32 and LTC6802 integrated circuit chips. The design for hardware and software is mentioned in the first, and then an experiment platform is set up for the function test. The test is successful and the result shows that the implementation is valuable and practicable.

Abstract: Sulige gas field had been developed for a long term, but the yield is hard to keep a high value. How to improve the daily production is a key problem. In the past, we usually fracture horizontal well in single section. In this paper, we talk about horizontal well fracturing in multistage. And meanwhile, introduce some low damage fracturing fluids. Finally, fracturing evaluation shows horizontal well multistage fracturing can improve the yield effectively. This experience can be popularized in similar gas field.

Abstract: TA mathematical model describing heat and mass transfer performance of packed-type parallel flow dehumidifier was set up. The numerical solution of differential equations was derived. Taking the heat and mass transfer coefficients obtained by experiments as the input parameters of the model, the impact of solution inlet parameters on outlet parameter of air was described. The simulation results indicated that the mathematical model could be used to predict the performance of liquid dehumidification. The results showed that the mathematical model can be of great value in the design and improvement of dehumidifier.

Abstract: This paper deals with the design and theoretical analysis on a novel vertical lift machine which can vertically lift above 700 kg load up to 3.2 meters above the floor and located the load with high accuracy of position and orientation. Firstly the design model based on the installment demands of line-replaceable units (LRUs) is constructed. Then theoretical analysis including the number of degree of freedom of the lift machine, the inverse kinematic, the control principle, the lift platform pose error and the precise pose control method are conducted in the article. The validity of the design model and the effectiveness of the precise pose control system are confirmed by experiments using a prototype lift machine.