Advanced Materials Research Vol. 462

Abstract: In this paper, a mathematical model of the piezoelectric fluidic angular rate sensor is created. At first, starting from the Coriolis acceleration, obtain a comparison expression for the angular rate and the flow velocity. At second, according to the heat balance theory, solve a comparison expression for the thermal resistance wire current and flow velocity under the forced convection heat transfer condition. At last, obtain a comparison expression for the angular rate and the thermal resistance wire current. Thus a mathematical model of the piezoelectric fluidic angular rate sensor is created. Experiments prove that the average deviation between theoretical and experimental values is less than 10%.

Abstract: Research and analyze the multi-thread schedule methods of the adjusted pressure casting control system deeply. Present an analysis method of related slice graphs based on the code slice and a theory of code subdivision based on the slice granularity and time slice. Then strictly divide the program of control system based on the time slice and obtain the strategies of event driven schedule and time slice schedule by analyzing the casting system. Subsequently, subdivide and recombine the multi-thread program slices based on the priority of the schedule strategies in control system. The control system was applied to the TYM-1 adjusted pressure casting system and the preferable effect is acquired.

Abstract: In this paper a method of on-line adaptation to illumination is proposed for mobile robot based on omni-directional in a changing illumination environment. Illumination condition is represented by an average luminance distribution of a reference object in a time series images. Illumination change is detected by computing the KL-divergence between two different distributions. A dual-threshold strategy is used to classify the current illumination into known conditions or an unknown one. According to illumination the robot decides to switch to a corresponding color calibration or learn a new one. Experiments have been carried out on the soccer robot M-TR. Experimental results show the efficiency of the proposed method.

Abstract: Dent resistance of automobile panels becomes an important issue and quality criterion. In this paper, the dynamic dent resistance of automotive hood outer panel is analyzed by means of finite element method. The geometric model of automotive hood outer panel is firstly established by UG software. Then the finite element model of automotive hood outer panel is established in ANSYS. The dynamic dent resistance of automotive hood outer panel is analyzed by simulating the collision between a rigid ball and an automotive hood outer panel. The results show that compared with the traditional steel panel, the automotive hood outer panel made of aluminum alloy can reduce its weight by 36.3% while meeting the requirement of dynamic dent resistance. It is concluded that making automotive hood outer panel by aluminum alloy is feasible for automobile lightweight.

Abstract: The take-off control of UAV with fly wing layout is limited by its relatively lower pitch moment. This paper gained the state parameters of a few groups of taking off model by means of numerical simulation. The influence of different models on take-off distance, take-off angle of attack (AOA), take-off safe speed and c.g. location was then analyzed. Based on the analysis, a new fly wing constitution was designed and the corresponding take-off control scheme was suggested as well. Finally, the flight test results shows that this fly wing constitution can gain better take-off control characteristics.

Abstract: The study on standard driving cycles is of great significance on design and control algorithms for HEV. This article applies the theory of uniform design on the driving cycle parameters research. According to the uniform design scheme for driving cycle parameters, not only greatly reduce the number of simulation experiments, by analyzing the experiment results, but also efficiently and intuitively identify the primary and secondary factors of driving cycle experiment parameters. Through the relevant energy management algorithm, simulation proves that the driving cycle parameters research on HEV is significance to improve the fuel economy.

Abstract: Research and develop an intelligent tracing robot system based on HCS12 SCM. The system uses Freescale HCS12 series 16-bit SCM MC9SXS128 as its central control unit and apply a CCD camera to obtain road image information. After analyzing and calculating obtained road image, the system controls servo steering and adopts PID control strategy to control the speed of DC motor. The result proves this method can make intelligent tracing robot system move forward quickly and smoothly following the black line.

Abstract: On-line monitoring system of transformer oil chromatogram works in laboratory. Using the basic principles of gas chromatography (GC) of the broad spectrum, the system provides online-testing of dissolving gases from oil with a single gas chromatographic column and sensors with high sensitivity. The single-chip is used to collect the data and control transformers. The main controlling computer realizes the function of analyzing and managing the collected data, by which transformer fault can be judged.

Abstract: Kinematic accuracy is a key reason which influence workpiece's geometric error precision on traditional working process of precisely CNC（Computerized Numerical Control）P3G（polygon profile with 3 lobes） grinding machine. A systematic geometric error model has been presented for CNC P3G grinding machine， proposed multi-body system theory integrate with the structure of CNC P3G grinding machine tools, researched on the machine's space geometric errors. By means of separate geometric errors from the machine tools, build geometric mathematical error model. Then, identify 21 error parameters through method of 9 lines, analysis and calculate the total space geometric errors of the workpiece and wheel. Finally, formed a parameter-list and applied software error compensational technique ， achieved real-time control to the motions of workpiece and wheel. Experimental results shown that the geometrical error modeling technique is accurate and efficient, and the precision of CNC P3G grinding machine is highly raised 70%.

Abstract: A new developed Intelligent Auto Sampler is introduced in this paper. The configuration and features of the new product are also presented in details with the hardware structure and system controlling. A simulation analysis of the design is given out with the UG 3-D simulation software in this paper. The design proved to be stable.