Advanced Materials Research Vols. 490-495

Abstract: Based on the rock mechanics test systems and the monitoring test of the acoustic emission (AE), the damage –fractured process for the double fractured rock is studied in order to gain the characteristics of deformation and damage evolution for the double fractured rock under the uniaxial compression. The damage evolution threshold value and the damage interpretation about the full stress-stain curve are given and the influence of initial damage on rock strength is analyzed. The results provide experimental foundation for engineering application.

Abstract: Three means to realize function approach such as the interpolation approach, fitting approach as well as the neural network approach are discussed based on Matlab to meet the demand of data processing in engineering application. Based on basic principle of introduction, realization methods to non-linear are researched using interpolation function and fitting function in Matlab with example. It mainly studies the RBF neural networks and the training method. RBF neural network to proximate nonlinear function is designed and the desired effect is achieved through the training and simulation of network. As is shown from the simulation results, RBF network has strong nonlinear processing and approximating features, and RBF network model has the characteristics of high precision, fast learning speed for the prediction.

Abstract: The central air-conditioning control system is a nonlinear, large inertia, delay system, controller the performance, relates directly to the control effect, energy loss and comfort level. This paper analyzes the working principle and characteristics of the air-conditioning system, and needle air-conditioning control deficiencies, with a prediction neural network control technology, established the neural network predictive controller model. Through the combination of sensor and controller predict, the simulation results show that the neural network predictive control has the characteristic of high speed and high control accuracy, and a strong ability to adapt and so on.

Abstract: This paper first introduces fuzzy comprehensive evaluation method to mine machinery. We evaluate the mine elevator braking system's reliability comprehensively from the perspective of the system. Application of the engineering calculation method can prove the reliability of the whole braking system systemically and completely. The precise data of real-time reliability could supply scientific and reliable information directly to hoist staff. The introduction of the method makes up the blank of analysis for elevator braking system safety and reliability, and provides a new thinking for performance evaluation of mining machinery.

Abstract: This paper uses the full wave method to study the fast wave current drive (FWCD) problem for Ion cyclotron resonance frequency (ICRF). It exists in such plasma bodies as circumferential Tokamak. The research has considered finite Larmor radius effect (FLR) and flattened dispersion. It found the physical model for full wave calculation-full wave method. Through the numerical solution of full wave method, the distribution of electric field strength can be obtained, which is stimulated and produced when fast wave stays in plasma body.

Abstract: The method of distance measurement based on binocular stereo vision is presented in this paper. The model of camera imaging is established and the process of camera calibration is described. Interior and external parameters of two cameras are calculated by HALCON. The system of visual measurement is fabricated. The parallax measurement of the image pairs is accomplished. The simulation experiments of distance measurement have been done and the calculated results can be in accordance with the actual distance.

Abstract: The current model of the lightning process is established and simulated in this article, and aiming at the disadvantage that the hardware filtering de-noising method adopted in the general lightning measurement system can not effectively separate signals and noises in same one frequency channel, this article uses the wavelet transform to replace the usual hardware filtering method in the lightning measurement system in order to overcome the disadvantage, and simulate this method. The result shows that this method is feasible and effective, with certain theoretical and practical values.

Abstract: At present, video monitoring equipments on highways in china are mostly used in a fixed position of the main roads, and the wired mode is generally used to transmit data. The purpose to improve the monitoring areas can be achieved by increasing the monitoring equipments and other means, but the cost of these methods are too high and the data transmission is limited by area, greatly restricting the large-scale application of those traffic monitoring equipments. In this paper, in order to achieve the function of road traffic information mobile monitoring, it completed the modification design of road traffic information mobile monitoring vehicle by use of CAD/CAE computer-aided designing tools. In this process, Jinbei SY6480 minibus was selected as the modification object, and the new re-layout in the car was implemented, and the lifting mechanism and vehicle wind-resistant design on the information collection equipment were especially included. Finally the three-dimensional modeling and finite element analysis were advanced by use of Pro/E and ANSYS software, ensuring the rationality of design. The vehicle designed by this paper can ensure that the information collection equipment achieve the intelligent monitoring function safely, stably and quickly.

Abstract: CPS has five functions of computation, communication, precise control, remote collaboration and autonomy, so there are broad prospects to do research on applying CPS to the warehouse management and control integration system. At present, it has considerable difficulties to design low-cost, real-time networking, predictable and strong robustness embedded systems for mature hardware technologies. The existing computer software technologies do not support to generate predictable and high reliable computing system. The application and development of CPS still need to study and solve many foundational scientific problems. On the basis of analyzing technological characteristic and technological potentiality of CPS, this paper provided a method which described the feedback working mechanism of the basic function of CPS unit, provided a common system architecture of the warehouse management and control integration system according to the characteristic of warehouse management, analyzed its working mechanism in detail, envisaged the application prospect of present research project

Abstract: RCS is an important indicator to evaluate the performance of an unmanned aircraft. It is often costly to measure the dynamic RCS of a large-electric-size unmanned aircraft. To solve the problem, a scale formula for RCS measurement is deducted from the Maxwell Equations. With the formula, the RCS of a large-electric-size unmanned aircraft can be calculated based on the RCS of a scale model. Furthermore, the method of calculation the dynamic RCS of an unmanned aircraft based on its static RCS and its flight paths is brought forward.