Applied Mechanics and Materials Vols. 738-739

Abstract: This paper proposes an algorithm of electric vehicle drive system when any current sensor fault. Reconstruct rough stator current by decomposing the DC current. Test whether any sensor fault by comparing the rough reconstructions and measured stator currents.Switch to the reconstructed stator current after corrected from the fault current when a stator sensor faults. Switch to the reconstructed DC current from the fault current when the DC sensor faults. Simulation result verifies the effectiveness of detecting the fault and keeping electric vehicle operation normal.

Abstract: A novel and effective technique was devised for synthesizing a pressure sensor based thermal plastic polyuthane (TPU) by covered a layer of less contineous graphene plus single wall carbon nanotubes (SWCNTs). Measured resistance versus deformation responses of the composites under compression, The resistance variation under compressive deformation dynamic range from several KPa to 0.5 MPa on the pyramid arrays shows high sensitivity. the piezoresistance repeatability under multiple compressive tests is reliable. Investigate the electromechanical response of the pressure sensor It was found that the elastomer exhibit a distinct relative of resistance versus stress in the regime of elastic deformation.

Abstract: Based on variational principle, the state-vector equation is established for driving analysis of a laminated beam with piezoelectric actuating layers. The beam are considered as a 2D line solid and the linear element is used. The influence of secondary converse piezoelectric effect (SCPE) on the displacement of the laminated beam is investigated. The state space finite element method is utilized to predict the deflection of the beam considering SCPE or not. If the influence of SCPE is eliminated, the displacement of the clamped beam increase by ∼2.7%. Furthermore, the effects with different PZT/steel thickness ratio considering SCPE are also studied.

Abstract: This paper mainly introduces the origins, basic structures and family members of carbon, the focus is a new generation of nanomaterial－graphene. In the experiment, a series of tests are taking place firstly, such as SEM, TEM, XRD, XPS, BET, Infrared spectrum, Raman spectrum and Laser particle size analysis. The results show that the graphene has excellent mechanical properties, optical performance, electrical properties and conductive properties. Especially super conducting properties of graphene. Then the basic principle of electromagnetic shielding effectiveness, test methods and condition analysis are analyzed in this paper.

Abstract: A method to optimize the structure parameters of sheds has been put forward for transmission line composite insulator. Fist of all, the unbounded domain is simulated by far field element to handle the open boundary problem of the insulator electric field model. Then, the finite element method (FEM) is employed to calculate the electrical field. The influence of sheds radius on composite insulator electric filed distribution is analyzed. The sheds radius is selected as optimization variable, and the optimization objective is to make the electric field more uniform. Moreover, the parameter analysis method is employed, and the optimal solution of the sheds radius is obtained. The optimized sheds radius make the electric field range and gradient along the insulator surface both tend to the minimum.

Abstract: Multipurpose tungsten and molybdenum disulfides with nanoscale layered structure formation are studied. Morphology and particle size distribution of initial tungsten and molybdenum nanopowders produced by electrical explosion of wire and used in metal disulfides synthesis are presented. Mechanism of metal nanopowder and elementary sulphur interaction in SHS condition with WS₂/MoS₂ nanoscale layered particles formation is considered.

Abstract: The behavior of 3d-shell electrons in ZnO-based varistors doped with semiconductor additives has been investigated. The 3d-shell electron details of the varistors can be extracted by a two-detector coincidence system of the Doppler broadening of positron annihilation radiation. It has been found that the 3d electron signal in semi-Z doped varistors is relatively high as compared with other varistors. The nonlinear coefficient of the sample decreases with the d-d interaction, and the leakage current of the specimen increases with the d-d interaction.

Abstract: A pure rutile TiO₂ coating was produced on titanium substrate by MAO processing in Al (OH)₃ colloidal solution. It is proved that Al (OH)₃ in the solution blocks the produce of anatase phase TiO₂. The rutile MAO coating has the advantage of high micro-hardness. Phase composition of the coating is analyzed by XRD in the study. Relation between rain size and micro-hardness of the coating is discussed and it is proved that the two parameters conform to the Hall-Petch relation.

Abstract: A vibration control method by using an active hybrid mount featuring piezostack actuators was indicated in this paper. The hybrid mount is composed of piezostack as an active actuator and rubber as a passive element. The hybrid mount was designed and manufactured after experimentally identifying actuating force characteristics of the piezostack and dynamic characteristics of the rubber. Then , a vibration control system with a specific mass loading is constructed, and its governing equations of motion are derived. A feedforward controller is formulated and experimentally realized, in order to actively attenuate vibration transmitted from the base. Finally, vibration control responses are evaluated.

Abstract: Liquid crystal display (LCD) is one of the most dynamic electronic products in this century. It has been recognized as a key component of media era, since it has many characteristics, such as a low operating voltage, light volume, and excellent performance of full color display, and suitable for LSI drive and the like. In order to break the limitations of LCD, improve its animation display performance as multimedia television monitor, and strongly simplify the manufacturing to ensure the competitiveness on price, we designed a LCD module with the liquid crystal cell of TD-EDA experimental system based on FPGA, and achieved the control of LCD with hardware description language VHDL in this paper. The validation results of compiled program downloaded on programmable logic devices after compiling and simulating show that the LCD we designed can run correctly and relatively perfectly.