Advanced Materials Research Vol. 909

Abstract: Since HXD₃/HXD_3C electric locomotive is put into use, the potential transformer cracks frequently. This paper summarizes several main reasons why HXD₃/HXD_3C electric locomotive potential transformer crack, and also proposes targeted solutions to promote the potential transformer reliability.

Abstract: Based on the study of GSM/GPRS, the research works from special practicality and provides a set of automobiles GPS terminal system. This paper mainly introduces the design of software and hardware. The paper analyzes the correspondence of terminal system and the control center and gives the correspondence rules. It also introduces two display modes, LCD and Graph Matrix Display. The solution for new kind of automobiles terminal system based GPS is provided.

Abstract: Aiming at the problem on complex structure and lack of effective training methods of the transmission developed a set of transmission interactive virtual maintenance training system. Used the software of Solidworks and 3D MAX to build a virtual prototype of the transmission, and then making simplification and rendering, by converting the coordinate system and the viewpoint to achieve the construction of virtual assembly environment. By controlling the node and the demolition path in EON, the virtual interactive simulation is achieved. Through collision the detection and path settings, the virtual interactive roaming is achieved. Determined the scoring rules, scoring criteria, assessment standards and other key technologies, achieved four functions of demonstration, learning, training and assessment. It has a great practical significance to improve the training effect, effectively solved the high cost of training, teaching efficiency and other issues.

Abstract: Parametric loudspeaker systems have been widely used for projecting highly directional audible sound to a specified area. However, the demodulated signal from parametric loudspeaker suffers from high distortion since the nonlinear interaction among primary waves also generate harmonics. In order to reduce distortion, signal acquisition and digital signal processing techniques can be applied at the receiver. In this paper, a parametric loudspeaker and receiver system is designed to reduce distortion using median filtering and mean filtering at the receiver. Compared to conventional systems, the demodulated signal using proposed techniques exhibits lower distortion.

Abstract: In order to handle dynamic and complex manufacturing environment, a novel coordination and control approachis proposed and applied to manufacturing control system in this paper. Using an implicit coordination approach, a novel coordination approach ,which is inspired by the hormone regulatory principle, can find efficient routing paths among the manufacturing resources automatically. With using the proposed implicit coordination approach, the manufacturing control system could reduce the amount of the control communication, and raise the sensitivity of the controller in the shop floor control system. Finally, a simulation experiment, using the proposed approach, is test. And the result confirms that the novel implicit coordination approach has excellent control performance in a static environment and good adaptability to disturbances in shop floor.

Abstract: This paper aims to using multistage inventory control theory to optimize traditional inventory control method, meanwhile, the spare parts supply of engineering ships are guaranteed and keep the cost in the lowest level. Moreover, in accordance with all kinds of construction task types to ensure the spare parts supply to satisfy engineering ships demand, and reduce the situation of shutdown unattended which is resulted by spare parts supply not in time.

Abstract: Automatic leveling system used in railway rescue crane has characteristics such as time variance, nonlinearity and strong interference, which bring a variety of difficulties in control process into existence. This paper introduces the working principle and mathematical model of automatic leveling system used in railway rescue crane. A fuzzy PID controller based on fuzzy logic control algorithm and conventional PID algorithm is designed, MATLAB simulation results show that the effectiveness of the proposed fuzzy PID controller, and the fuzzy PID control strategy has better effect on the automatic leveling system used in railway rescue crane.

Abstract: For the requirements and problems in remote monitoring and control system of electrical haulage shearer, this paper research the key technologies of shearers remote monitoring and control system, such as position and attitude testing, control strategy decision, communication real-time and reliability of network. Position and attitude testing method based SINS (Strap down Inertial Navigation System) was designed to measure position, attitude angle, speed and drum height of shearer together. The shearer control strategy based on work mode was proposed to control shearer working in optimal status. Finally, the network control model of shearer was established in order to analyze the time delay that effects on shearer control system.

Abstract: In the paper we considered a hybrid method of dynamograms wavelet analysis, applied for oil-production equipment work mode identification. Neural network architecture for sucker-rod deep-well pump units malfunctions detection is proposed. The architecture of intellectual data recognition system applied for pump installation control is presented.

Abstract: An upstream transmission scheme of asymmetric clipping optical orthogonal frequency division multiplexing (ACO-OFDM) based WDMA-PON is proposed. Performance of 10Gbit/s/ONU upstream ACO-OFDM signal is analyzed. The scheme is high capacity and power efficient.