Applied Mechanics and Materials Vols. 373-375

Abstract: In hydrostatic bearing, the applied load is carried through the compensatory effect of restrictors. Different throttle methods will bring different oil film rigidity and carrying capacity. There are mainly four types restrictors such as capillary,orifice,slide valve and film feedback restrictors. The mathematical models of carrying capacity and oil film rigidity of the hydrostatic bearings throttled by the restrictors mentioned above were presented. The oil film rigidity of hydrostatic bearings throttled by different restrictors were analyzed. Reynolds equation was provided and the numerical solution model was constructed. The pressure fields show the static performances of hydrostatic bearing with different restrictors.

Abstract: The subject of boom lifting and slewing need to repeat ten hundreds times in truck crane operating reliability, resulting in lasting for dozens of days. It is difficult for the inspection officials to supervise the entire procedures, which influences the objectivity of examination. A monitoring system was developed based on virtual instrument technology. It consisted of the load lifting height detection nodes, boom slewing counter module and data collector, etc. The height was measured by two relative-distance wireless nodes which are based on CSS (Chirp Spread Spectrum, CSS) technology. The boom slewing count was achieved by logic circuit. The signal of it was input by two sensors which were distributed at 180°. The height and count were transported to data collector via wireless network. The number of cycles of boom lifting and slewing was automatically judged by client software in data collector based on the height and slewing count. Preliminary experiments were conducted. A total of 800 experiments were tried and 793 times were successfully counted. The accuracy was 99.1%. The results show that the system can meet long-term demand for reliability test effectively. It is helpful to reduce labor intensity and guarantee the authenticity of examination.

Abstract: Under the call of energy conservation and emission reduction in the whole world, the hybrid cars with its good fuel economy become the important vehicle mode. The ordinary passenger is converted into a hybrid passenger, in order to meet the power performance and fuel economy of the hybrid bus and the power control requirements, the ordinary passenger must be modified design mainly equipped with assembly parts. This article mainly design assembly parts arrangement position of the equipped later, and make the front and rear axle load difference of the hybrid passenger and the original passenger be not large, to ensure all performances of the hybrid electric passenger. Then for the whole vehicle arrangement parameters variation, respectively analyze the quality parameters.

Abstract: Electric bicycles as a new means of transportation is gradually rise. this paper introduces hydraulic drive into electric bicycle, avoiding the problems of frequent adjustment and repair, and reducing the noise. Electric hydraulic driving bicycle may be a new road to develop the electric bicycle industry. This paper combines the working principle of electro-hydraulic driving bicycle, determining the performance parameters of electro-hydraulic driving bicycle, and the parameter calculation and selection of components in the hydraulic system.

Abstract: A spatial 3-DOF translational parallel mechanism is analyzed. Its inverse kinematic model is established. The section view of the workspace of the parallel mechanism is presented via boundary search method under the defined constraints. Considering the workspace volume as the optimization object, the relationship between structural parameters and workspace volume is obtained and the structural parameters to be optimized are determined. Finally, the optimization configuration of the mechanism is obtained. The results show that the volume of the workspace increases 1.55 times as much as the original volume, which lay the foundation for the architecture design.

Abstract: The interface is constructed between the mine dump trucks performance simulation software and the genetic algorithm, aiming at the very complex relationship between the mine dump truck engine and its dynamic performance and fuel economy. The optimization of the objective function, optimization variables and constraints are designed. Genetic algorithm is used to design type 3303B mine dump trucks. The optimization of the design results are compared and analyzed on before and after and the results show that the fuel economy of the optimization of genetic algorithm is better than the original car, fuel consumption reduced 0.51 every km.

Abstract: Design capability of process chamber in IC equipment is of great significance for enhancing the core competitiveness of IC industry. The traditional design methodologies adopted by most enterprises are based on experience and the efficiency is not high. As a new intelligent design methodology, Knowledge-based Engineering (KBE) can realize automation of repeat design and complete the product design quickly to meet market demands. In this paper, the background of KBE is discussed systematically and the evolution of different phases of the technology is described. The definitions of KBE given by the relevant institutions from different perspectives are enumerated and the structure framework is shown. KBE is also compared with other design methodologies commonly used. The main technologies of KBE are introduced in detail, and the domestic and overseas application status of KBE is analyzed. In addition, the roles of this methodology in product design are summed up and the future trends are predicted. At the same time, the design demands and tasks of process chamber are confirmed according to the practice of IC equipment. Moreover, current prevalent problems in the field are pointed out, and the basic ideas and the key steps applying KBE to the rapid design of process chamber are put forward.

Abstract: The safety storage of rice or brown rice moisture content is below 14% ,hardness and brittleness is larger to low moisture content of brown rice, the crack in the manufacturing process of milling rice and broken rice rate is higher, milling processing energy consumption to increase, and the rice surface roughness is low .In this paper, using mathematical simulation method based on the theory of the humidifying, thin layer of humidifying dynamics model is established, and brown rice humidification conditioning properties are studied. Results show that the unit heat consumption is reduced with the increase of air temperature,humidifying rate increases, the bread machine temperature linearly increases; With the increase of wind speed, unit heat consumption increases, humidifying rate increased.

Abstract: Combined with the actual situation of sanitation vehicle at home and abroad, the text analyzes development trend of hybrid electric sanitation vehicle, selected assembly-driven structure of parallel electric sanitation vehicle power systems,designed two different programs of power systems, and this program plays an important role in improving the dynamic and economy of sanitation vehicle.

Abstract: In this paper, the application of Scene Simulation technology to walkthrough is introduced in detail, and two key links of system implement with the scene simulation technology are analyzed, which are the construction of three-dimensional model and the implement of the walkthrough drive engine. MultiGen and OpenGVS are selected to be the walkthrough system development platform. The whole system realization from the construction of three-dimensional model to implement of the walkthrough drive engine is discussed particularly.