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After generating reference trajectory in the process of reentry guidance for reusable launch vehicle, if the designed bank angle curve is too close to the constraint boundary, there is a great possibility for the obtained reference trajectory to exceed the reentry corridor boundary. This paper proposed a margin searching method, to reduce the likelihood of generating a reference trajectory which exceeds...
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...
This paper presents the operational analysis and performance comparison of various current-type Z-source inverters. With an X-shaped LC impedance network added, all current-type Z-source inverters can perform current buck-boost operation with expected output performance except of the case where modulation index is tuned to be lower than the physical boundary between linear modulation and distorted...
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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