45results about How to "Reduce the difficulty of engineering realization" patented technology

The invention provides an electromagnetic levitation structure for a maglev train. The electromagnetic levitation structure includes a plurality of superconducting levitation frames and a plurality of normal conduction levitation frames arranged at intervals at the bottom of the car body of the maglev train, wherein: the superconducting levitation frame includes The superconducting magnet, the low-temperature Dewar and the first support structure are used to provide the suspension suction force between the magnetic levitation train body and the suspension track; the normal conduction suspension frame includes the normal conduction magnet, the iron core and the second support structure, which are used for The suspension air gap between the car body of the magnetic levitation train and the suspension track is adjusted. In the hybrid electromagnetic levitation structure of superconductivity and normal conduction proposed by the electromagnetic levitation structure used for maglev trains provided by the present invention, the superconducting magnet provides the main magnetic field for suspension, and the constant conduction magnet provides the magnetic field for adjusting the air gap, which has a large levitation air gap Moreover, the advantage of low suspension loss can reduce the requirements for smoothness of the track, which is conducive to line construction and line cost reduction, and is also conducive to the static floating of the maglev train and the simplification of the electromagnet cooling system.

The invention provides a reflecting surface antenna double-beam forming design method. Through creatively introducing a double-beam covering area shape characteristic analyzing step in a designing process, a targeted initial beam acquiring manner and a corresponding antenna structure configuration strategy are made. Based on searching of a reflection plane scattered field focusing point under planar wave excitation according to a conjugate field matching theory, a rotation rule in long axis direction of a longitudinal movement beam of feed sources at two sides of a focusing point is utilized, and wave beam covering matching design is performed. Through feed source position adjustment, axial torsion of the whole reflection surface antenna system is performed, thereby improving beam covering matching property of double beams and performance of a restraining area, and furthermore improving gain of a double-beam coverage area after optimization. According to the reflecting surface antenna double-beam forming design method, according to a wave beam shape characteristic relationship, antenna layout and the like, and design principles such as a wave beam shape is adjusted according to the feed source position. A design order, a parameter selecting principle and technical details in double-beam design are described, and gain improvement of the double-beam coverage area is realized.

The invention provides a method of identifying a fully-polarized active false target based on a frequency diversity system. According to the technical scheme, the method comprises the following steps: after signals received by a channel H and a channel V of radar are synchronously sampled, 2M sub pulse echo signals are separated through digital variable-frequency filtering; then, 2M channels of data are output after matched filtering; and non-coherent integration and target detection are performed, the polarization characteristics of each detection result are extracted, and whether a target is true or false is identified. Based on a frequency diversity system, a radar target and the interference of a fully-polarized active false target can be effectively distinguished and identified by emitting multi-frequency signals and making use of the important characteristic that the polarization scattering property of a radar target is sensitive to the excitation frequency.

The invention relates to a spatial solar power station for energy distribution collection conversion and beam centralized control emission in the field of space technology. The solar power station comprises a plurality of independent and identical energy collection conversion devices and a beam centralized control emission device which are all placed on a spacecraft platform. The energy collectionconversion devices are evenly distributed on a circle centered on the beam centralized control emission device, are fixed in relative positions to form a co-located satellite group. The solar power station having a large overall size is converted into multiple groups of identical devices which collect and convert spatial solar power in a distributed manner, are independent of each other, and do not affect each other. Each individual device is small in size and light in weight. The spatial solar power station is not required to be assembled and spliced in orbit, thereby reducing the requirements for carrying and greatly reducing the difficulty in engineering realization.