Advanced Materials Research Vol. 648

Abstract: The vehicle taillights control circuit with mechanical properties is composed of a clock pulse circuit, a switch control circuit, three hexadecimal circuit, decoding and display drive circuit, taillight display. The circuit is simulated with Multisim. The simulation results show that vehicle taillight display can make pedestrians and other vehicles understand clearly the occurrence of the vehicle’s dynamic change, thus which can prevent the occurrence of traffic accidents effectively.

Abstract: In the network security monitoring system, it is important to trace information source timely and accurately, which is an important way to investigate and collect evidence. But because of public network’s IP limited resources, LAN hosts usually share the public network’s IP resources by NAT way, and conceal internal network structure, which make the network security monitoring system unable to locate the real effective sensitive information source in LAN. Based on the study of WINPCAP network sniffing technology and the ARP deception protocol in exchange network environment, a network security monitoring system with mechanical properties suitable for LAN environment is designed and realized, which locate information source accurately through filtering and matching the sensitive information transmitting in LAN by setting the capture factors as key words of document, web site shared by FTP, QQ number etc.

Abstract: According to the underwater ballistic characteristics of unpowered anti-submarine weapon, double plane guidance of self-correcting ahead angle and tracing method was adopted. This paper established homing model, guidance, control model and the motion model of unpowered antisubmarine weapon. In typical combat situations, it carried out simulation about underwater guidance and control trajectory. Projectile motion properties were analyzed and it verified effectiveness of the guidance and control methods, it provided a basis for underwater trajectory planning, guidance and control method.

Abstract: This paper deals with the distributed model predictive control problem in multi-agent systems under fixed interaction topologies. we propose a distributed model predictive control schemes with guaranteed closed-loop stability. In this distributed structure, the problem is decomposed into a set of distributed optimal control problems. Simulation results show that the proposed scheme is effective under fixed interaction topologies among subsystems.

Abstract: Flight control system; multiple criteria decision making; multiple objective decision making; multiple attribute decision making; neural network; mean impact value index. Abstract. It is complex and difficult to tune the parameters of the flight controller. To solve such problem, a multiple objective decision making (MODM) method by using the reference model which is built based on the criteria, is proposed. In order to resolve defects of the multiple attribute decision making (MADM) that the arbitrary of the subjective attribute weights and ignoring the objective message of the objective attribute weights, a subjective attribute weights based on the BP neural network by using the MIV (mean impact value) index is proposed. Finally, a combining method based on the TOPSIS is used to give the final attribute weights. The simulation results show that the method could obtain a set of trade-off solutions which satisfy the requirements of the MODM and could tune the controller effectively.

Abstract: In order to improve learning efficiency and save energy, the author has studied electronic resource system for autonomous leaning with its electronic materials and energy saving system. During the study course, some electronic materials had been investigated and some users had been made real survey to get the real condition and simulation condition. Therefore, some controlling measures had been put forward and some electronic materials had been scientifically studied. The author hopes that the study will help to improve learning efficiency and saving energy.

Abstract: In order to improve control performance of the electric vehicles independent motor driven wheel steering , using the Ackerman angle relation to design electronic differential system of electric vehicles based on DSP2407 . This control strategy considering various pavement condition and slip rate, will be able to realize the electric vehicles in the complex road conditions, and have fast response requirements. Electronic differential controller of electric vehicles based on DSP2407 can deal with between speed of body and Angle of the nonlinear relationship effectively, when steering operation, is about to drive wheel with input different torque, realized the good adaptive differential, and has advantages of good real-time performance and strong robustness etc.

Abstract: Aiming at moving track control of mobile robot, this paper studied the practical implementation of linear control algorithm in moving track control of robot, expounded and proved its feasibility and analyzed stability constraint condition of the algorithm, and then analyzed effects of control parameters on moving track through simulation. Finally, the paper applies the algorithm on actual control of robot, and designed gyroscope and photo-electricity encoder-based control system of mobile robot for green house application.

Abstract: Distribution Static Synchronous Compensator (DSTATCOM) to the public through the connection point into the reactive power can adjust the voltage of public access point, so as to meet the voltage quality. First of all papers DSTATCOM system in accordance with the instantaneous power balance theory derived DSTATCOM voltage used to control the direct voltage control strategy. In the control strategy without current detection circuit with traditional cascade control, compared with the control is simple, the advantages of fast response. And voltage control strategy for the direct control of the controller by the system parameters impact the performance of larger defects, a direct voltage DSTATCOM fuzzy PI control strategy, so that the instantaneous power balance in accordance with the direct voltage control has better control performance.

Abstract: This paper presents a direct current-controlled static reactive power compensator (DSTATCOM) for voltage quality improvement of low-medium distribution network. The main circuit of the DSTATCOM uses VSI-SPWM structure-based voltage source inverter (VSI), and both operation of reference current and control of compensation current are realized in synchronous reference frames. The function of DSTATCOM to mitigate voltage sag and flicker, two common voltage quality problems, is discussed in detail in this paper. According to the forming way of reactive reference current, operation mode of DSTACOM are classified into current control mode and voltage control mode. And under the two operation modes the function of DSTATCOM to mitigate voltage sag and flicker under different control modes is simulated with MATLAB. The simulation results show that the current control mode is suitable for mitigating voltage flicker, while the voltage control mode for voltage sag.