Applied Mechanics and Materials Vols. 190-191

Abstract: To deal with the problem of target identification caused by the achieved reliability of multi sensors and the feature measurement uncertainty of the target, this paper proposes a new identification algorithm based on Modified Interval Dempster-Shafer Theory (MIDST), which models sensor’s reliability as scalar value and identification outputs of each sensor as interval values, and then combines the actual interval outputs through interval evidence combination rules. At last, one simulation is presented to demonstrate the identification capability of the MIDST algorithm.

Abstract: Magnetic bearing is a new type bearing used in many fields. An appropriate controller can greatly improve its dynamic performance. With the development of software and hardware of computer, many new platforms appear suitable for studying of controller of magnetic bearing. Typical software platforms include universal operation systems, such as Dos, Windows, and some special operation systems, such as RTLinux. Some applications, such as Matlab/Simulink, can also be applied. And typical hardware platforms cover PC, DSP and some special embedded computers. The design mode of the controller also advances from code design to model design. Many new development plans of magnetic bearing controller based on these platforms and design mode have many advantages over old platforms. For designers, the development plans based on theses new platforms are good choices for bringing about a stable, short development period, low cost controller.

Abstract: In this paper, a new controller of the pitch angle of the wind turbine is designed based on improved cooperative co-evolutionary algorithm(ICCEA). The ICCEA is based on general co-evolution model, and can choose evolutionary algorithm for its subpopulations independently, and regulate the probabilities of individuals production to promote the speed of evolutionary according to the characteristic of control system by introducing distribution function. The simulation results demonstrate that the proposed controller can efficiently and steady control the output power of the wind power generation system. Compared with the traditional PID controller, the controller has better control performance.

Abstract: In order to make up the deficiencies in the goaf coal spontaneous combustion monitoring of mine safety monitoring system. Provide the most direct and effective data for the early identification and prediction of the goaf coal spontaneous combustion fire. The NRF905 Radio frequency (RF) communication technology had been adopted to design the goaf coal spontaneous combustion monitoring system, which accompany by SCM, sensors, Clock circuit and CAN bus communication technology. The paper given the overall design of the system, and key technologies of system had been made research and implementation. Experimental tests showed that the device layout simple, networking fast, the effective data of each node position could have been made real-time collection.

Abstract: In order to realize the application of the underground wireless monitoring network, in view of the characteristics of the underground wireless monitoring, a kind of multi jump wireless routing protocol based address priority and star-bus topology is designed in this paper. After the analysis of the mine wireless transmission process model and data broadcast problem, considering the technologies of direction control, second localization, the anti-interference, network survival period and so, a method of adding the protocol address and the uplink and downlink flag is proproesd to solve these probles above. Simulation results show that, this protocol can be successfully completed the wireless datatransmission in the underground laneway environment.

Abstract: It is presented a model of uncertain time-delay switched fuzzy systems, which each subsystem of switched system is an uncertain time-delay fuzzy system. The robust reliable control problem is studied by multi-Lyapunov functions. When the actuators are serious failure – the residual part of actuators can not make original system stability, using switching technique depend on the states of observers, robust fuzzy reliable controller is built to ensure the relevant closed-loop system is asymptotic stability. The results for example are used to illustrate the feasibility and the effectiveness of the method.

Abstract: The mining boundary ultra-layer & cross-border of some small coal mines in the profit-driven results in a many of safety accidents, waste of resources and environmental damage while the state can not achieve the full uninterrupted supervision because of the backward monitoring tools and equipment. In this situation the real-time monitoring system for underground mining activities is designed based on explosion source location technology. Small and medium-sized coal mines tunnel by blasting operations. The P waves are picked up by acceleration vibration sensors buried underground that are identified and dealt by using wavelet transform. The bursting point is located by the Geiger algorithm and displayed in the mine’s electronic map. The monitor system has good stability, small positioning error by field-proven.

Abstract: This article designs a kind of automatic adjustment of the press control values based on PLC including the design of function, composition, principle and software. It not only analyses and studies the structure and the principle of the automatic adjustment, but also presents the selection of PLC, I/O assignmen and program design.

Abstract: This paper proposes the design with GSM network, ARM chip S3C2410, as the Cybernetics Core of the whole remote household monitoring system, and Linux operating system as a whole system, and give the hardware and software design of Intelligence household in remote monitoring system.

Abstract: This paper designed a photoelectric detection system based on C8051F350 , which can be used in the grating spectrometer system. Aiming at traditional detecing methods, this paper puts forward a multi sensor data fusion technology which can fuse detecting data from multi photomultipliers. It has very strong practicability that detection data can be transmit to the computer through the serial port to draw curve of spectrum.