Applied Mechanics and Materials Vols. 157-158

Abstract: In this paper, an intelligent controller of PM DC Motor drive is designed using particle swarm optimization (PSO) method for tuning the optimal proportional-integral-derivative (PID) controller parameters. The proposed approach has superior feature, including easy implementation, stable convergence characteristics and very good computational performances efficiency.To show the validity of the PID-PSO controller, a DC motor position control case is considered and some simulation results are shown. The DC Motor Scheduling PID-PSO controller is modeled in MATLAB environment.. It can be easily seen from the simulation results that the proposed method will have better performance than those presented in other studies.

Abstract: The pressure field of the clearance oil film of the hydrostatic bearing in varies velocities was simulated based on Finite Volume Method (FVM) by the software of Computational Fluid Dynamics. In this article, a conclusion could be drawn that the viscosity has great influences on the pressure in the heavy hydrostatic bearing and it cannot be neglected especially in high rotating speed. The results of numerical calculations provide internal flow status inside the bearing, which would help the design of the oil cavity structure of the bearing in engineering practice.

Abstract: This design can shorten the mixer tank’s designing cycle, and reduce production cost. Through the research of logarithm spiral curve, a related calculation equation is derived, and by using the approximate calculation method of numerical simulation, every spiral leaf busbar’s spiral Angle is achived. Using Pro/E curve and surface of the software design functions, calculating according to the design, the spiral leaf 3 d modeling and design of the tanks are completed. The experiment shows this tanks completely meet the demands, discharging residual rate index is up to the national standard.

Abstract: Optimization analysis of transmission system simulation models and discussion on the optimal matching of transmission equipments are carried out based on the existing tridimensional rail power driven container terminal transmission system network. Two-dimensional animation display of the transmission system is realized through multiple simulations utilizing simulation software. The simulation analysis indicates the average operating efficiency of the equipments such as quay crane and gantry crane have reached 82 percent. The simulation results have some valuable reference for the actual production and the realization of the tridimensional transmission system.

Abstract: In this paper, an electromagnetic design method for a novel DC Lorentz Motor for micromanipulation is described. To optimize permanent magnet (PM) array and minimize the magnetic field coupling among PMs, the distribution of magnetic field and the fluctuation of Lorentz force are obtained by the 3D finite-element method (FEM). Through the electromagnetic analysis, an optimized distribution and shape of PMs are found. Finally, the optimized DC Lorentz motor is manufactured. These simulation results are verified by those of the experiment results, which presents the finite element model and simulation results are reasonable.

Abstract: In the OPC Unified Architecture specification, Discovery is the important part which contains the solution for finding OPC UA Servers in enterprise system. Finding target is considered as the first step of communication. Even though OPC UA Servers (UA Servers) provide extensive functionalities and data, it is largely ineffective if the UA Servers cannot be discovered for later use. This paper aims at leveraging OPC Discovery concept, has been being developed by OPC Foundation, by using WS-Discovery to overcome main challenges: (i) Discovery process is still static and need improving, (ii) embedded OPC UA devices become more and more popular, discovery mechanism need extending for them, and (iii) discovery process is being tied in one domain, it needs extending for cross-domain case as well.

Abstract: After Iodide modification using KI solution on the surface of nitrile rubber, the treatment effect on the friction properties of nitrile rubber are explored. Experiments using different concentrations KI solution, soaking the samples for different time, the friction properties of the samples are tested under different load and lubrication. The results showed that, under different conditions, the surface of iodide modified nitrile rubber is dense and smooth, with the increase of KI concentration and soaking time, the degree of iodide modification is deeper, and the friction properties of NBR is also significantly improved.

Abstract: The method and technique of the 3D model transformation for 2D engineering drawing using NX7.5 was studied. The key points of GC china toolkits, method of master model and pattern were introduced. The GC china toolkits produced convenient way to custom drawing standard to match China standard through some simple operation. The method of master model realized the relativity between 3D model and 2D drawing. The pattern was an effective method to add drawing frame and title bar to sheets. In the end, the process of 2D engineering graphics creation was expatiated. The practice case proves that the drawing efficiency is improved greatly by NX7.5 application.

Abstract: Based on the theory of roughness during cylinder grinding and the theory of fuzzy-neural network, a surface roughness intelligent prediction model is developed in this paper. The feed, speed, and the vibration data are the inputs for the model. An accelerometer is used to gather the vibration signal in real time. The model is used in the grinding experiment, and verifies the feasibility of the proposed model.

Abstract: A novel design of a temperature test chamber in multi-parameter combined environmental test was introduced, in which thermoelectric coolers were adopted to achieve both high and low temperature. Multiple distributed actuators and temperature sensors were used for improving the evenness of the temperature field. A well performed cooling system for waste heat dissipating was designed based on air-cooled radiator and circulating water flow. A temperature control system based on PC and MCU with wireless communication modules was designed. The thermoelectric cooler was driving by H-bridge circuit, whose power was controlled by PWM signal. PID algorithm was applied and average temperature was adopted to be the controlled variable. Measurement and control software on the PC and MCU was analyzed and its flow diagram was given. Influenced by centrifugal acceleration, unevenness of the temperature field would increase. A fan was mounted at the bottom of the chamber to improve the evenness of the temperature field. The experiment results show that the temperature environment with other combined environment is realized in the test chamber based on the above technology.