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During the electromagnetic launching process, the supporting insulators suffer from the complicated environments. Under the action of strong pulse stress, high temperature, arc and other factors, it will directly lead to insulation failure and performance degradation in electromagnetic launcher system. Therefore, it is necessary to study the characteristics of insulators under high temperature condition...
In this paper, studying the problem of hypersonic ballistic missile attacking large moving target on the sea and considering the motion characteristic of the target, we focus on the passive tracking subject of height-measurable missile. In terminal guidance of hypersonic ballistic missile, measurement noise of LOS (line-of-sight) angle which is provided by infrared seeker is large due to aerodynamic...
The structure of aircraft's airfoil is elastic and flexible. When the aircraft flies at a certain speed in the flow field, the couple-interaction of airfoil's elastic deformation and aerodynamic force will cause its self-excited vibration with amplitude increase, and this phenomenon is called airfoil's flutter. Such sharply divergent structural aeroelastic vibrations may threaten the flight safety...
This paper presents a load impedance estimation and iterative-learning control for a three-phase four-wire inverter. The topology of a three-phase four wire inverter is adopted to uninterruptible power supply (UPS) applications, which can supply unbalanced load, linear load and rectified load. The proposed load impedance estimation scheme employs an RLC equivalent circuit concept to determine the...
Based on the simple hinge crack model, the dynamic equation of a rotor containing transverse crack and initial deflection is modelled in dimensionless form, which can be applied to the vibration analysis of cracked rotor with different parameters at stationary, transient and nonlinear state. By analytical solution, the frequency components of the cracked rotor with initial deflection are compared...
In this paper, detailed analysis is given on the design of metastable-hardened and soft-error tolerant flip-flops while maintaining the basic characteristics of low-power and high-performance. We also propose two new flip-flop designs: pre-discharge soft-error tolerant flip-flop (PDFF-SE) and sense-amplifier transmission-gate soft-error tolerant flip-flop (SATG-SE). Following our main design approach,...
Because of the complementarity of process planning and scheduling and the multi objectives requirement from the real-world production, the research of this paper focuses on the multi-objective collaborative process planning and scheduling problem. In this paper, a game theory based genetic algorithm has been proposed to solve this problem. The game theory is used to deal with the multi objectives...
TCP-friendly rate control(TFRC) is an equation-based congestion control mechanism that competes fairly with TCP but has a much lower throughput variation, which makes it a better choice for streaming over the Internet. It is known that in a mobile network environment, after a handover TFRC can overshoot or under utilize the new link if the conditions there differ from those of the old link. There...
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