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This paper presents a stand-alone hybrid PV/fuel cell system using single-inductor dual-input single-output (SI-DISO) boost converter. Compared to conventional hybrid power system, the proposed system significantly reduce the number of components, the system size and the corresponding cost. A model predictive control (MPC) method has been developed to control the SI-DISO boost converter to achieve...
In this paper, we discuss in detail the propagation of electromagnetic waves through a vortex. The velocity profile of the vortex is represented by the cylindrical symmetry vortex which is nothing but the Burgers vortex in cylindrical coordinates. To obtain the equations for the electromagnetic field in a vortex in the cylindrical coordinates, we have used the Minkowski constitutive relations. To...
In the long-endurance UAVs, the conventional INS/GNSS integrated navigation system is widespread used. But with the increasing man-made interference and electromagnetic environment worsening, the GNSS system will be easily failing in location. In that case, using other aided navigation systems based on the characteristics of objects & geophysical field is necessary. However, the aided navigation...
To meet the need of high-precision navigation for HALE (high-altitude long-endurance) UAV (unmanned aerial vehicle), multi-sensor fault-tolerant autonomous navigation system was researched. For the shortcoming that the GPS signal is easily interfered by electromagnetic techniques, combining sundry integrated navigation patterns such as the INS/CNS integrated navigation, the INS/SAR (Synthetic Aperture...
The error of the inertia navigation system can be modulated critically by using the real-time SAR image through image matching and positioning. The mismatching points are inevitable in the SAR aided navigation. In the integrated navigation, the measurement outliers will affect the filter seriously. In order to eliminate the effect of the mismatching points, combining the discontinuous working characteristics...
The Technical Barriers to Trade (TBT) is an important problem faced to the export of China. Based on the number differences of TBT notifications between countries, we propose the concept and computational method of the technical barrier coefficient. By means of price-production and price-demand functions, a trade model with a developed country and an under-developing country is designed. The available...
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