Applied Mechanics and Materials Vols. 48-49

Abstract: Pixel binning is a very important mechanism in CCD (Charge Coupled Device) image capture system. At the cost of resolution degradation, the readout speed and SNR (signal-to-noise ratio) are improved. A 3×2 pixel binning technique is reported in this paper and the driving timing sequences are presented. Compared to normal 2×2 pixel binning, this technique keeps a relative better SNR ,but in the same readout speed.

Abstract: A simulation-based modular planning and scheduling system developed for semiconductor fabrication facilities (SFFs) is discussed. Firstly, the general structure model (GSM) for SFFs, composed of a configurable definition layer, a physical layer, a process information layer and a planning and scheduling layer, is proposed. Secondly, a data-based dynamic simulation modeling method is given. Thirdly, a simulation-based modular planning and scheduling system (SMPSS) for SFFs, including model modules, release control modules, scheduling modules and rescheduling modules, is designed and developed. Finally, a case study is used to demonstrate the effectiveness of

Abstract: Electronic ballast with self-oscillating driving topology for electrodeless lamp operating in 2.65MHz has been restricted by high switching losses because of the very complicated control. To promote the efficiency of the electronic ballast, we present a new independent easier controllable driving scheme in this paper. The IC features of ADuM1234 and the duty circle control method to achieve ZVS operation are also presented. It is shown that the 2.65MHz, 75W electronic ballast has a 91.1% inverting efficiency.

Abstract: According to EMC Standard,fulfilling one Test-Item generally includes below process: select and configure the parameters of instrument,form and execute the Test-Flow, therefore the main task of EMC is to configure instrument and form the Test-Item. In this paper the authors present a new method using configuration file to describe EMC Test-Item to improve the expansibility and maintainability of EMC test software. Multi-layered software architecture is designed according to EMC test operating sequence, and COM component technology is used to design the core module of each layer to guarantee plug&play for the new program-controlled instruments. Because of using the form of configuration file to describe Test-Item, the new Test-Item will be produced through Test-Engine calling Test-Item Configuration Generator. The Virtual Instrument Software Architecture is used to design and realize the frame of EMC software, and the Visual C++ software platform is used to realize the above design method. Application using configuration file make EMC software has the features of easy to use, easy update and expandability.

Abstract: Unmanned surface vehicle (USV) system has been one of main research directions in mobile robotics because it can be used in many situations. However, high performance path following control, especially straight line tracking control, has been one of the difficult problems in autonomous control of USV system. In this paper, we propose a new straight line path following control algorithm by combining yaw angle feedback and back-stepping technique and show its closed loop stability. The most absorbing advantage of the proposed controller is that it not only reserve the good performance of back-stepping controller but also bring much faster convergent rate, which is very important in real applications. The simulation results with respect to a training ship model have shown the feasibility and validity of the proposed method.

Abstract: designed a equipment for testing the strength of seats and head restraints, the equipment can testing the seats and head restraints with the standard of GB 11550-1995 5.2. The equipment was composed of one upper cylinder elevating system, a beam elevating system, two load cylinders and a hydraulic station. In addition to designed the principle of the hydraulic system.

Abstract: As for the separated air conditioner in the public is not facilitate for unified management and often causes a waste of energy, so we put forward a kind of centralized control system, which is suitable for small and medium-sized public places, to manage many separated air conditioner together. Through the development of the software VC++ and the communication with the internal 51-series microcomputer CPU of the air conditioner in many different rooms by using the bus RS485, we could realize the controlling of the turning on or off of the conditioner as well as the temperature and strength of the wind of the air conditioner centrally. The system is characterized for its highly safety performance and its ease to use.

Abstract: This paper aims at designing a visibility forecasting system on freeways based on the Internet of Things. Physical processes of fog formation on freeways are explored by the related real data and circulation background fields, and then some characteristics are presented through the forecasting model. The paper introduces the Zigbee protocol into the hardware design of the system, in which the epigenous machines can analyze the received data dynamically.

Abstract: Expounds characteristics of the frame structure and function of a hydraulic walk caterpillar vehicles. A frame structure is designed to suit for a caterpillar running system with hydraulic pump- motor circuit. While to design such a frame, there must be a tradeoff between mechanical property and its mass. Based on establishing the geometric model of the frame, the finite element method is used to analyse the distribution of stress and strain of the frame in its working condition. Furthermore, aim to reduce the mass of the frame, a programme is designed and applied to find the best tradeoff point between requirment and mass. The programme is developed using APDL(ANSYS Parametric Design Language). The simulated example showed that the propose method in this paper can be applied to optimize the frame of caterpillar vehicles.

Abstract: A fuzzy neural network based on-line turn fault detection approach for induction motors is proposed in this paper. B-spline membership fuzzy neural network is employed to detect turn fault and a genetic algorithm with an efficient search strategy is developed to optimize network parameters. Based on it, Experiments are carried out on a special rewound laboratory induction motor, the results show fuzzy neural network based diagnosis model determines the shorted turns exactly, and is more effective than the parameters estimation method under the condition of detecting a slowly developing turn fault.