Applied Mechanics and Materials Vols. 536-537

Abstract: In various kinds of natural disasters, earthquake is one of the most serious threats to the lifeline engineering systems. In the earthquake, except of the structure was destroyed, the function of the lifeline engineering systems was often subject to serious damages or totally loss, even caused fire or blood, or gave away poisonous gas and other series of major secondary disasters. To strengthen the function of the lifeline engineering and avoid or reduce the occurrence of secondary disasters, a demonstrated system of earthquake emergency auto-handling applied in water supply was built. The system was composed by the ED-1 type ground motion sensor module unit, the Panasonic FP-X C30R type PLC unit, The Kunlun Tongtai TPC7062K type unified touch screen unit and the multifunction water tower testing unit. The STA/LTA method and spectral intensity method were applied to deal with the distant earthquake and the near earthquake separately. Through theory and experiment analysis, the earthquake emergency auto-handling system could accurately measures the seismic records and performs the earthquake emergency auto-handling rapidly.

Abstract: According to the characteristics of non-linear, time-varying and large time delay in the control of grate cooler, a multi-mode intelligent control method is proposed in the paper.The multi-mode intelligent controller is builded up by variable integral PID control, fuzzy control, Bang-Bang control and expert control. This control method through a multi-mode intelligent control rules automatically identifies different modal and chooses a corresponding control algorithm to correct variable integral PID control.Industrial applications show that the control system has good robustness, achieved good control effect.

Abstract: This dual-ducted SUAV is a nonlinear and strong coupling of multiple-input and multiple-output system, and particularly between the pitch and roll channels channel coupling is strong, in order to implement effective control, it must be decoupled. The traditional methods are difficult to achieve effective control of the strong coupling of multivariable systems. For the SUAV model of nonlinear coupling characteristics, based on the establishment of the UAV attitude model, this paper designed an attitude ADRC decoupling controller. The simulation showed this ADRC decoupling controller had strong robustness and immunity, and solved the channels coupling between the pitch and roll.

Abstract: This paper studies an automatic control device applied to goose feather ironing. It is a hybrid control system which incorporates sequential control, electric-drive control and temperature control. The device centers on PLC and takes advantage of the Y-axis and Z-axis servo drives to obtain an optimal control path. The fuzzy control technique used in temperature loop can restrain the temperature disturbance effectively. By using the human-machine exchange interface technology based on touch-screen, the device realizes user interface and system monitoring capabilities. Compared with the traditional machine, the new device can improve the production efficiency and quality significantly.

Abstract: The work focuses on synchronization of time-delay chaos systems. A theoretical analysis for time-delayed system is provided. By using the Lyapunov-Krasovskii approach, a synchronization condition is obtained. Finally, conditions are used for synchronization of time-delay chaos systems, and simulations verify the validity of obtained result.

Abstract: According to the demands of electric equipment monitoring and control, a design of on-off control system for electric equipment based on WiFi is presented. The system introduces WiFi wireless communication technology into the communication network construction, which realizes the rapid wireless data transmission, simplifies the network organizing method and saves the network building cost. The WiFi on-off control device and the host computer program based on C# are designed. The WiFi on-off control device has the functions of on-off control of electric equipment and WiFi communication. The host computer program realizes the functions of system login, electric equipment terminal configuration, electric equipment on-off state display and control. The system test and analysis results show that the designed system can realize the remote wireless control of multiple electric equipments and the operation effect is good.

Abstract: this paper introduces a kind of virtual experiment bench for electronic controlled engine. The experiment bench based on a super electronic controlled engine gets rid of mechanical system, but reserves electrical components. The experiment bench has the characteristics, such as simple structure, safety, environmental protection and economical efficiency. Part of the sensor signals can be simulated through a variable resistance, and the working processes of some actuators are shown by light bulbs, so that the whole bench is easy to operate, and the working process is visual and direct. The bench panel is equipped with inspection terminals for easy measuring and teaching; several systems are combined onto one experimental platform, which can improve the comprehensive analysis ability of students. The bench can also be developed, designed and produced in the form of project by students under the guidance of teachers, thus to promote the scientific and technological innovation ability of students.

Abstract: This paper describes the frequency electrostatic dust-phase power design, triggered by SCR phase control method to achieve closed-loop control of three-phase AC voltage regulator of the main circuit, designed three fold spark for spark control tracking control algorithm. Electrostatic precipitator and main circuit power supply is simulated, and the main circuit parameters were calculated, the results show that the system can be better used in industrial environments dust.

Abstract: The output feedback control problem is addressed for a class of switched fuzzy Systems. Using multiple Lyapunov function method and switching law, the relevant closed-loop system is asymptotically stable, with the switching law designed to implement the global asymptotic stability. The sufficient conditions to ensure the output feedback asymptotically stable output feedback control of closed-loop system are studied. The sufficient condition is transformed into Linear Matrix Inequality (LMI) problem which are more solvable. Finally, a numerical simulation example is employed to illustrate the effectiveness and the convergence of the design methodologies.

Abstract: The repetitive control theory is a theory of control system design, the purpose is to design a controller , which can make the system steady-state error be zero under tracking arbitrary periodicity reference signal, the repetitive control theory has been widely applied in tracking control system with periodic reference signals.