Advanced Materials Research Vols. 989-994

Abstract: The influence of tooth profile parameters on the strength safety coefficient can provides the basis for the design of high strength herringbone planetary train system. Through calculation of the three strength safety coefficients (contact strength, bending strength, bonding strength), curves of the relationships between the tooth shape parameters (addendum coefficient, tip clearance coefficient, spiral angle) and the strength safety coefficients have been obtained and the impact of tooth shape parameters on the three strength safety coefficients have been analyzed. The research results show that the bigger addendum coefficient can be selected for the design of high strength herringbone planetary train system. In order to satisfy bending strength, no-undercut and lubrication condition the smaller tip clearance coefficient should be taken. The strength safety coefficients are bigger with the increase of spiral angle, so a bigger spiral angle may be appropriately chosen.

Abstract: Hydraulic support is widely used under the mine while the pressure is the most important factors of its safety.In view of the defects about present pressure monitor of mining hydraulic support ,designing a mining hydraulic support pressure monitoring system based on LabVIEW.This article mainly introducing the overall structure of the system, hydraulic system principle, the LabVIEW program, data communication and interface design.Using LabVIEW collection and storage support’s real-time pressure information. On the basis of the single chip microcomputer and the LabVIEW for data processing and display, improving the real-time control of hydraulic support.

Abstract: Laser induced fluorescence (LIF) detection technique is one of the most sensitive detection method in micro total analytical systems (μTAS) as its good monochromaticity, strong collimation and high optical density. It is widely used in biochemical analysis systems and the detection limit could reach 10^-9-10^-12 mol/L. Due to the important role in μTAS, different optical structure arrangements of LIF detection techniques were continuously developed. We reviewed the recent progress of the optical structure arrangement and the applications of the LIF detection techniques.

Abstract: The detection of carbon with the contents ranging from 0. 000 5 % to 0.010%, and of sulfur with the contents ranging from 0.000 2% to 0.010%, has become an inevitable requirement for steelmaking process control. Due to the extreme low carbon and sulfur contents, using infrared carbon sulfur technical analysis has lower peak value than the background value of the instrument, and it is difficult to control the best analysis conditions of obtained valid signal; in addition, the small errors brought by crucible blank, sample weight, and uniformity of the samples may have great impact on the detection results. To solve this technical problem, this study gives up the single point calibration applied by infrared absorption method, but uses linear calibration method to detect ultra low carbon and sulfur contents in steel, which effectively meets the demand of manufacturers on the development of high-value-added products, and provides reliable data for production.

Abstract: The paper summarizes the research progress of analytical method of sulfur element in iron-base alloys as of 2012. Major analytical methods for sulfur element in iron-base alloys include infrared absorption, photoelectric direct reading spectrometry, inductively coupled plasma atomic emission spectrometry, ion chromatography method, mass-spectrography, and electrochemical method. The paper also predicts the future trend of the analytical methods for sulfur element in iron-base alloys.

Abstract: The positioning accuracy and work efficiency of flexible manipulator is seriously affected by its vibration. Therefore, vibration control of single joint flexible manipulator is studied by using an improved PPF algorithm based on LabVIEW and piezoelectric technology. Firstly, the improved PPF algorithm principle is introduced. Then, the experiment process is discussed in detail. Experimental result shows that the improved PPF algorithm can effectively control the first two modal vibration of flexible manipulator. The control effect is close to 14 dB and improved nearly 4.5 dB compared with PPF algorithm.

Abstract: With the rapid development of economy, the consumption of energy increasing year by year, the conventional energy is facing increasingly draining.The wind and light power supply system controller in the mobile base stations is a kind of power supply management system,used the wind and light, which have the biggest and the most development potential renewable energy and new energy technology at present.That especially suitable for mobile communication base station,and remote sensing, remote control base station power supply and operation environment. The controller can reduce run maintenance cost, improving the quality of communication and system management level,and the efficiency of the whole.

Abstract: According to system dynamics and in-tree structure, we choose National Transport & Logistics Public Information Platform (LOGINK) as a research object. Then, considering new service concept, new customer interface and new delivery system, its dynamic mechanism of service innovation is studied. Finally, we establish the corresponding dynamic relationship model and deduce dynamic relationship equation.

Abstract: When the kinetic energy projectile into concrete target movement, angle of attack can affect the penetration process of ballistic performance, resulting deflection effect, thus affecting the penetration depth. For the analysis of kinetic energy projectile penetrating the lateral movement of the target deflection model, using the finite element simulation software for lateral movement of the target missile penetrates the process of numerical simulation. The results showed that: rigid lateral movement of the target missile and projectile kinetic energy projectile velocity has some deflection effect. Playing the role of the kinetic energy of the lateral movement of the target, the missile body yaw angular velocity increases and then decreases after the first, but not so obvious kinetic energy projectile yaw.

Abstract: The differential scanning calorimetry is a thermal analysis. Under program controlled temperature, measure and input to the relationship between the the sample and the reference’s power difference and temperature. The curve which the differential scanning calorimetry recorded called DSC curve. DSC curve in the sample’s rate of endothermic or exothermic as ordinate and in temperature or time as abscissa, which can determine a variety of thermodynamic and dynamics parameters, such as specific heat capacity, the reaction heat, thermal changes, phase diagram, reaction rate, rate of crystallization, polymer crystallinity, purity of a sample,etc. The method has a wide temperature range-175 ~ 725 °C, high resolution, less samples . This topic utilizes differential scanning calorimetry and had a pyrolysis experimental analysis for urban sludge. Due to the rapid development of technology and analyzer’s constant improvement, and computer technology’s speedy development, DSC plays an increasing role in the sludge treatment field.