Advanced Materials Research Vols. 562-564

Abstract: This paper proposes a low bandgap reference voltage circuit with low temperature coefficient and independent of suply voltage for applications to power management IC. This proposed circuit is design and implemented using the TSMC 0.35μm CMOS 2P4M process. Based on simulated and measured results , the chip size is 20.6000.680mm with power dissipation about 3.3mW, and the operation temperature range form 0Cto 100C with temperature coefficient about 9.29/ppmC. The chip suply voltage can from 2.9V to 3.3V with PSRR about 44.2 dB, and its output reference voltage can stable at 0.65V.

Abstract: This paper indicates the influence on the operation of the strop ropeway under the action of headwind, and establishes a curve equation of strop ropeway with wind load in accordance with static balance theory. It makes a dynamic analysis on bi-cable tackle under the action of headwind load, and determines the acceleration of the tackle under wind load. Meanwhile, it analyzes the whole course of the bi-cable strop ropeway, the influence of the wind load on the running speed and result of the strop tackle under the headwind. The paper summarizes the calculation process for the speed of bi-cable strop tackles under different conditions and finally tested and verified it through illustration.

Abstract: In this article, through the in-depth analysis of handling techniques of scrap material in a cigarette factory and working trait of automatic guided vehicle (AGV), and considering the capacitated of AGV transportation, a new scheduling policy is proposed for its transit of the scrap in one manufacture unit, a capacitated GA model is also proposed to solve AGV scheduling problems. Based on self-learning and the improved GA, and considering the compromising solutions for the capacitated of AGV, the real-time scheduling policy of AGV is provided. The rule of encoding, selecting, crossover selection and variation probability is studied. The results of the simulation calculation and application in the cigarette factory have been effectively improved, and the example proves that the research is feasible and effective.

Abstract: In the inverter control system, two-phase modulated space vector pulse width modulation (SVPWM) algorithm has the advantages of minimum switch loss and higher utilization of direct current (DC) bus voltage. Non-dead-time control strategy can eliminate the problems of the dead time effects. But the traditional non-dead-time control strategy heavily depends on the current zero-crossing detection, which may cause the output voltage distortion or even a short circuit. Based on the analysis of the reason for the distortion, a new optimized non-dead-time control method is proposed. Two methods for the detection of the overlapping area are enumerated. The conclusions are confirmed by the simulation results with MATLAB/ SIMULINK.

Abstract: The modern design methods lead to the objectivisation of the process of thinking, which is important for the new system development. The aim of objectivisation and decomposition of the design is obvious: it should enable a new approach in the problem solving and thinking of the designer, enriches the large quantity of new information, facts and ideas, which are important for the system designing. The first part of this paper gives a brief presentation of mobile elevating work platform structure response to the wind excitation in possible resonant states. The second part is dedicated to the dynamic analysis of the mega container crane structure subjected to the moving load.

Abstract: A game model is proposed to discuss the possible coalition structures of hydropower stations. The stable coalition structures in different contexts of electricity markets are derived on basic of numerical simulation using the raw data of three hydropower stations on the middle and lower reaches of some river in China's south-western region as a case. The coalitional stability is analyzed by a dynamic cooperation game approach using the conception of LCS and EPCS. The total purchase power fees of the grid in three coalition structures are calculated and compared to analyze the effects of coalition structures on the social benefit.

Abstract: The article indroduced the system of ore mixing of sintering based on data mining. Appled the method of cluster to the saved history data of the sintering process to classfy the history data into three category. Every new sample should be put into the Corresponding cluster by the distance of Eucliden, at the meantime, find the nearest proportioning ore case, and the quality index of the new sample is same with the nearest case. The method is more useful and easy.

Abstract: Large collapse of underground house of a hydroelectric power station happened while excavation of the top arch. The volume of collapse was up to 5000m3. With consideration of the field geological conditions and practical construction, by strength reduction finite element method (FEM) and discrete element method (DEM), the process of collapse is simulated, which is compared with the field monitoring data. The mechanism of instability failure is analyzed. Some conclusions are obtained. Firstly, the development of fractured weak zone β80, faults, joints and fissures above the top arch are the basic factors to induce this collapse. Secondly, abrupt blasting without supporting is the direct factor. So collapse of underground house can be avoided by reinforcement and supporting on the geological weak zone in time.

Abstract: KDF4 filter rod maker is the newest and latest unit model in the field of filter rod maker, this article introduces and analyses the electrical control system of the KDF4 filter rod maker, then proposed a set of design project and applied it to the filter rod maker, which enhance the accuracy and reliability of the rod maker and improve the operating efficiency of the machine.

Abstract: This paper proposed the reliability method of cyber-physical systems(CPS) based on events polling and interrupt control, discussed the reliability problem of CPS. According to the characteristic of polling principle and the CPS events model, proposed the polling principle of the CPS based on events. combined the method of the interrupt control, according to the spatio-temporal attributes of different events, set the different interrupt priority to solve the reliability problem of the CPS event model.