Advanced Materials Research Vols. 912-914

Abstract: This paper mainly adopts the finite element analysis software ANSYS to calculate and analyze the dynamic characteristic of aqueduct structure,using added mass method to deal with interaction between water and aqueduct wall, and get the natural vibration frequency and main vibration mode of U-shaped aqueduct in different water depth. The calculation result shows that water has a small effect on the vibration mode of aqueduct structure, but has a greater influence on the natural vibration frequency of aqueduct structure; natural vibration frequency of aqueduct structure decreases with the depth deepening. The research results provide the basis for the seismic design and protection of Sunjiagou aqueduct.

Abstract: The low caving coal hydraulic support can be transformed into standing shield hydraulic support which is mining full height in order to adapt to the change of mining conditions. On the basis of the analysis of the key elements of retrofit design, transformation practice of specific type of hydraulic support is carried out. The result shows that retrofit design is effective and has an important practical value .

Abstract: in view of the current situation of ship has collision with sea mountain , design and develop the sonar of ship collision avoidance system based on PLC.its main purpose is to remind the crew in front of mountains and ship automatic collision avoidance. The design is based on the minimum distance of ship and mountain, put forward the system scheme: measure the two objects distance by sonar , using this system as the control core , the information is analyzed and calculated by this system. When the distance between ship and mountains is less than the minimum safe distance.so this system will alarm crews and as deceleration avoidance .

Abstract: The rotary inertia, speed, acceleration of shafting and the friction coefficient of rubber bearings have an important influence on the calculation of shafting resistance moment, related to the selection rationality of driving motor. In order to guarantee load startup and normal operation of the shafting, by analysing shafting rotary inertia, bearing support force and friction coefficient, calculated resistance moment of the shafting, established the mathematical model of shafting equivalent resistance moment and motor rotational speed, compared the output moment of motor with shafting equivalent resistance moment, so that determined the correct motor model.

Abstract: In this paper, a HV and HF switch power supply was designed, which was controlled through a single chip microcomputer, also the MOSFET was used as the switch power tube. The PWM (pulse width modulation) technique and half-bridge inverter topology have been used to invert AC into the DC that can be adjust from 0V~25KV and the operating frequency is 35KHz, Through the simulation with the Saber software and practical use, the feasibility of the scheme and the correctness of the design have been verified.

Abstract: The design is in view of the features stenosis and short-range of inland waterways, applying photovoltaic technology of solar to the small-and-medium-sized boats, combining solar-power generation with the technology of electric propulsion of marine. It advances ship design and optimization, component design and matching, and reasonably layout solar panels on the boat and the pier, without affecting the tourism, designing a solar-powered catamaran to achieve zero emissions and the desired effect of energy saving.

Abstract: Based on the analysis of the physical channel and frame structure of TD-LTE system, considering the influence of control channel overhead and uplink-downlink configuration, two estimating methods of the TD-LTE peak throughput are analyzed, which have positive preference value for network planning.

Abstract: Recently, with the development of industrial technology, as well as the economic and environmental incentives, the Vehicle to Grid (V2G) technology was born for solving economic and environmental issues. Currently, the V2G is an active research topic among academic, governments and vehicle manufactures. Considering the great potential benefits of V2G, this paper try to give a preliminary survey on the V2G technology, and help them finding related remaining research issues.

Abstract: Biological CPG (central pattern generator) is responsible for the generation of animals' rhythmic motion such as hopping and running. In this paper, a novel feedback-based CPG control method is proposed, in which output of the CPG network is totally activated and contained by sensory feedbacks. The network responses to environment changes quickly with multi-feedbacks included, and has strong adaption to disturbance and non-flat terrain. This control method is applied to the controlling of a single-legged hopping robot to show the effectiveness of the approach. The simulation results prove that this control mechanism closely couples environment and robot motion, and dynamically stable hopping emerges from feedbacks contained in the neural networks.

Abstract: When driving at night, the driver may be troubled by the intense light shined by the vehicles coming from the opposite direction. The automobile lighting system and the windshield with polarizers have been designed to solve this problem in this paper, thus replacing the traditional non-polarized illuminating light with linearly polarized light. The experiment reveals that, for a wide range of tilt angles of the windshield, the intensity of light emitted by other automobiles that a driver can receive will be reduced by 40%--64%, while the driving visibility is little affected. Therefore, it can be concluded that the new system can effectively increase the safety factor of night driving.