Applied Mechanics and Materials Vols. 130-134

Abstract: In this paper, we present yet another design of the variable-bandwidth digital down-converter (VB-DDC). The shaping filter in the DDC architecture is substitute with a method which is implemented with fully pipelined computing structure of systolic decomposition for distributed arithmetic (DA) based FIR filer. The systolic structure of the FIR filter involves significantly less memory and complexity compared with the existing ones. The effectiveness of the design is validated by the proposed FPGA implementation results.

Abstract: Mitsubishi FX2n series PLC's CPU module comes with high-speed pulse output channels. Using these channels, you can achieve position control of stepper motor. This article describes the use of high-speed pulse output instruction on the stepper motor control to achieve the design points. Contents include: key issues of PLC equipment selection, use of pulse command, and the stepper motor selection and setting.

Abstract: By using the advanced quantum theory of mesoscopic circuits, a mesoscopic quartz piezoelectric crystal equivalent circuit is quantized. The energy spectrum and wave functions of the system are obtained with perturbative method and the current quantum fluctuation are calculated as an application. The detail characters of energy spectrum and wave functions in the system would be helpful to the design of integrate circuit.

Abstract: Based on the bubble dynamics, the generation and separation of bubble plays a leading role in the heat transfer of boiling condition. Before the bubble separation, micro liquid layer below bubbles is evaporated to dryness and heat transfer deterioration is the ultimate cause of boiling crisis, proposed a critical heat flux mechanism in the conditions of low velocity and narrow channel. A critical heat flux mechanism model is established. By calculation, in the low mass flow range the mechanism model has a high precision to predict CHF in a larger pressure and export dry degree ranges. Using the model the relationship of parameters is studied.

Abstract: The main result of this study is to propose a liquid-cooling system for high power LED heat dissipation treatment. By using thermal dissipation mechanism and based on ANSYS CFX numerical analysis of change the parameters of cold plat. We will get the optimal heat dissipation structure. The experimental results show that the Taguchi method of thermal mechanisms in this study of the four control factors affecting the order: k value of thermal compound > fan power > liquid type > pump flow rate, and to identify the best combination of factor levels. When the heat source is 90 W, the best factor of the experimental cooling system thermal resistance is 0.563K/W. Nomenclature

Abstract: This paper focuses on the parameterized computing system on structure of lift scaffolding attached to the wall. Taking full advantage of the relevance between finite element analysis and computer programming, VB software as an input interface of the parameterized, and ANSYS finite element software to do the background analysis, the parametric program of APDL is automatically packaged and called when VB is used to do the second development on the ANSYS software. The structural parameterized design system of lift scaffolding attached to the wall is developed in this paper so that the calculation workload of body frame could be reduced. The details of the parameterized design system and related technologies are given in the paper.

Abstract: Currently one of the most important, time-consuming and costly phases of PDP production is the inspection process. The lighting inspection machines play a very important role in this process. The inspection and test system of the lighting inspection machine whether good or not decides the inspection effectiveness. This paper mainly describes the function and design method of every important part of the lighting inspection machine’s inspection and test system.

Abstract: --In the paper we have chosen to create a universal remote control on the Android smartphone. The concept of a universal remote has helped in solving the problem of having different remote controls for different things around the house. Our project will serve to extend the “All in One” capability of a smart phone to include universal remote functionality. This project will use code learning technology as opposed to code entering to ensure that every button is functional when using the smartphone remote control.

Abstract: An analysis on the nonlinear dynamics of a cantilever functionally graded materials (FGM) cylindrical shell subjected to the transversal excitation is presented in thermal environment.Material properties are assumed to be temperature-dependent. Based on the Reddy’s first-order shell theory,the nonlinear governing equations of motion for the FGM cylindrical shell are derived using the Hamilton’s principle. The Galerkin’s method is utilized to discretize the governing partial equations to a two-degree-of-freedom nonlinear system including the quadratic and cubic nonlinear terms under combined external excitations. It is our desirable to choose a suitable mode function to satisfy the first two modes of transverse nonlinear oscillations and the boundary conditions for the cantilever FGM cylindrical shell. Numerical method is used to find that in the case of non-internal resonance the transverse amplitude are decreased by increasing the volume fraction index N.

Abstract: A switched controller is designed for the Boost DC /DC converter. The proposed switched controller takes advantage of both min-projection-controller (MPC) and integral modulated pulse-width controller (IMPWC), in which the MPC deals with the transient process and the IMPWC is in charge of the steady state. Smooth switching is ensured by resetting the integral value of IMPWC according to the static average model and steady output voltage. Simulation results proved the control effect of the switched controller.