Advanced Materials Research Vols. 443-444

Abstract: A adaptive fuzzy Sliding Mode Control (SMC) scheme based on Radial Basis Function Neural Network (RBFNN) for attitude tracking control of Flapping Wing Micro Aerial Vehicle (FWMAV) is proposed in this paper. A RBFNN is used to compute the equivalent control of sliding mode control, An adaptive algorithm is used for weight adaptation of the RBFNN and A Lyapunov function is selected for the design of the SMC. The simulation results of FWMAV demonstrate that the control scheme is effective.

Abstract: Abstract.Blast Furnace Gas (BFG) system of an iron and steel works was considered. The relationship of gas amount and factors about BFG generation and consumption was analyzed by grey correlationand the BP neural network prediction model of blast furnace gaswas established based on artificial neural network for forecasting thesupply and demandof BFGinthe iron and steel-making processes.The scientific forecasting of BFG generation and consumption in each process was discussed undernormal production and accidental maintenance condition. The results show that established forecasting model is high precision, small errors, and can solve effectively actual production of BFG prediction problem and decreasing BFG flare, providing theoretical basis for establishing reasonable plans in the iron and steel works.

Abstract: The Na/S battery is a kind of advanced secondary battery which with β （β）- Al2O3 as the electrolyte, its negative electrode is metal sodium and positive electrode is sulphur. It has advantages of large capacity, small size, long service life and high efficiency. The raw material of the Na/S battery is widely and the production cost is low. In addition, it’s not limited by space and easy to maintain. The Na/S battery is widely used in stable supply of renewable energy such as peak load shifting, emergency power and wind power, In terms of improving the stability of the power quality, Na/S battery is a most maturely and potentially energy-storage battery in a variety of advanced secondary battery.

Abstract: In the mixed refrigerant cycle, the key technology is the choosing of the mixed refrigerant and its optimization mixture ratio. Based on a small-scale CBM liquefaction system LNG5, which the capacity is 5 cube meters LNG per day, the numerical simulation and optimization for the LNG5 are carried out. It provides the composition of the mixed refrigerant. It analyzes the effects of mixed refrigerant components on the temperature difference of the heat exchangers and the vapor fraction of the key nodes. The analysis results show that a reasonable mixture ratio of mixed refrigerant is given, such as CH4 mole fraction being 41.8% ～ 44.3%, C2H6 mole fraction being 40.8% ～ 42.2%, C5H12 molar fraction being 14.3% ～ 16%, and N2 mole fraction being 1.5% ～ 3.3%. The results provide guidelines for the design of the small-scale CBM liquefaction device, and for the application and commissioning of CBM liquefaction plant in China.

Abstract: A novel monopole patch antenna with very simple structure to fabricate on a printed circuit board is proposed to operate from 3.05 to 11.8GHz for UWB application. Ellipse technique is used to optimize its main parameters when an improvement of its compact profile is achieved. The designed antenna has miniature total volume of 18.6mm×18mm×1mm, and quasi-omnidirectional pattern in the X-Y plane across the major bandwidth.

Abstract: In view of all sorts of questions existing in CNC machining, such as machining vibration, so proposed a new method of free-form surface NC machining path optimization based on constant scallop height. This method first discrete surface boundary into the knife touch point based on the maximum tolerance, then in accordance with the maximum allowable scallop height generates circular trajectory with the same scallop, and finally connects adjacent curve path using the diagonal to achieve a continuous cutting scallop height tool path. This method can reduce the number of tools cut in and out parts, reduce the processing vibration and tool wear, and the surface processed has the same precision. This method has simple calculation, suitable for free-form surface of CNC highspeed and precision machining.

Abstract: In order to overcome shortcomings of the traditional PID control for nuclear steam generator water level, we proposed a fuzzy PID control system by using fuzzy reasoning. By summing up the experience of skilled operators, we gave a set of fuzzy control rules, and determined some important control parameters. To verify the effectiveness of fuzzy PID control, a simulation for a steam generator in Qinshan nuclear power plant, for example, was given. Simulation results show that the method can effectively improve the control quality.

Abstract: The hydraulic lifter is mainly used in automobile testing and repairing. At present , most of hydraulic lifter adopts two cylinders structure, and the synchronization of two cylinders is realized by the connection of steel wire and chain. The problem of this lifter is under most circumstances only one cylinder is working, and another cylinder is moving positively by the pull of steel wire. To solve this problem, through adopting an unique three-gear structure which can guarantee the flow capacity to each cylinder is very even, this paper develops a good property, low cost, simple structure and easy installing synchronizer of hydraulic lifter. The hydraulic lifter installing this synchronizer can delete the original steel wire and chain. The experiment shows that the error of output flow capacity to each cylinder is very small and synchronizing precision is very high.

Abstract: For the purpse of meeting the needs of modern automobile parts and equipment test, a modular reconfigurable testing system for automobile parts and equipment was carried out. In the testing system, industrial computer as host computer performs human computer interaction, and the client computer is extended based on FPGA(Field Programmable Gate Array). FPGA excutes real-time task that can be configured according to mission requirements. The procedure of modular testing system which was designed with the Microsoft Visual C++ 6.0 is divided into human computer interaction and driver layer. The result showed that the system can be used for rapid design of auto parts and equipment testing system. The result of the present work implied that the reconfigurable testing system has good flexibility and expansibility.

Abstract: In order to be able to directly observe the interior of boiler furnace, which is of high radiation environment, a novel furnace visualization system and robot handling system for coke and slag are proposed in this paper. The developed furnace visualization and robot handling systems can find and clean fouling, slag on the boiler heating surface, improving the unit economics and safety.