Advanced Materials Research Vols. 631-632

Abstract: The large-displacement motion simulator which composed by Cartesian coordinate movement Desk and Three-axis turntable was designed in this paper. This Motion simulator can move the working spaces to any position of the space by any posture, which solved the disadvantages of the STEWART platform, the smaller spatial displacement and limited space corner. Kinematic analysis of the large-displacement motion simulator was discussed in this article, and theoretical modeling of the large-displacement motion simulator was presented by KANE equations. This has the theoretical significance for the research of the technology of space motion simulation and docking.

Abstract: This paper considers the robust stability criteria of uncertain system with time-varying delay. Firstly, by exploiting a new Lyapunov function that optimizes the segment of time delay and using the convexity property and free-weight method of the Linear Matrix Inequality, delay-dependent stability condition can be obtained for the asymptotical stability of the nominal system. Secondly, basing on the obtained condition, the corresponding linear matrix inequality can be obtained for the uncertain system. Finally, an example is given to demostrate the effectiveness and the merit of the proposed method.

Abstract: This paper investigates the stability problem for Lurie control system with multiple delays. The system with multiple time-delays is transformed, then the delay divided into several segments, a novel Lyapunov functional is introduced and some new delay-dependent stability criteria are derived by employed integral-equality technique. It is theoretically proved that the obtained criteria are less conservative than some existing ones. An example is given to illustrate the effectiveness of the proposed results.

Abstract: The output electrical characteristics of a simple thermoelectric module consisting of two thermoelements are discussed theoretically. And the output power, area-specific power and weight-specific power are formulated as the function of the length and cross-section area of the thermoelements, load electrical resistance and the coolant heat-transfer coefficient. A preliminary analysis and geometric optimization are then undertaken to reveal the dependences of the power characteristics of the thermoelectric module.

Abstract: Four novel ideas are proposed in this paper to integrate an active RFID tag with thermal convection angular accelerometer on an engineering plastic substrate, thus the device is a wireless sensor. The first innovative idea is that this device is without any movable parts, so it is very reliable. The second new idea is that it is made on an engineering plastic substrate, such as polyimide, the thermal conductivity is much lower than silicon, so it can save more power and very useful for mobile operation. The third new idea is that the xenon gas is applied in the chamber for heat convection instead of CO₂ used in the traditional thermal convection accelerometer. Carbon dioxide can produce oxidation effect to the heater and thermal sensors, while the inert gas xenon will not. The fourth new idea is the most powerful one to integrate with an active RFID tag on the same substrate, thus it is very useful for mobile operation, and is very easy for usage and fabrication. If one considers sensitivity as the first priority, then choose the floating structure (233°C/(rad/s²)). On the other hand, if the response speed is the requirement, then the non-floating structure is better (70μs).

Abstract: This thesis is based on the battery theories and the technologies of battery charging. On the design of fast charging and energy-saving system of battery, it combines the features of pulsed charge and the rapid interrupt charge methods, and simplifies the circuit structure of the power supply, which reduces the loss of energy and enhances the efficiency of power conversion. It also uses capacitors for storing the energy of the pulsed discharge, and then charging back to the battery, so as to achieve both the aims of fast charging and energy saving.

Abstract: The integration, integrated device integration solution is an important part of the Intelligent Power Distribution Park, perfect, versatile intelligent components platform made the equipment intelligent become possible. The paper presents the design of a general distribution equipment intelligent component platform, presents the intelligent component module structure and configuration program. And equipped with real-time operating system for intelligent units work together for the management, and can satisfy the requirements of the intelligent power distribution equipment. Finally, carried out the Verify of GOOSE protection trip delay for real-time to the Intelligent Component Platform, the results meet IEC61850 standard requirements, providing a reference for the follow-up research and development of power distribution equipment intelligent components.

Abstract: Function synchronization is an important type of chaos synchronization because of enhancing the security of communication. In order to obtain the better conformances of function synchronization, a method of the fractional-order chaotic system is presented, which based on the stability theory of the fractional order system. This method need construct a parameter matrix and a coupled matrix using fractional-order chaotic drive system at first, and then the chaotic response system is set up with these matrixes. The synchronization error function between drive system and response system is satisfied with the asymptotic stability. Function synchronization of the fractional-order Rikitake chaotic system is selected as a typical example. Numerical simulation results demonstrate the validity of the presented method. This method not only has better synchronization conformances, but also can be applied in the chaotic secure communications.

Abstract: Hyper-chaotic synchronization can be applied in vast areas of physics and engineering science, and especially in secure communication. A hyper-chaotic synchronization method based on inverse-system theory is studied. The reversibility and relative degree of the synchronization error function are determined through Lie derivation calculation. A close-loop controller is obtained by synthesizing and designing a pseudo-linear feedback system, which used for estimating output variable synchronization error. Hype-chaotic synchronization of a four dimensional oscillatory system is selected as typical example and the simulation results demonstrate the validity of the method. The research results provide a useful reference for realizing hyper-chaotic synchronization.

Abstract: In after-sales services of Heavy-duty automobile industry, a major problem is analyzed, and the after services collaborated management integrated platform based on ASP mode is put forward. The system structural and functional model of this platform is also introduced. Supported by web service technology, the framework of ASP mode is established, and the integration of produce process information and after-sales services process information is realized. The answer pace and quality of after-sales services is greatly improved.