It is challenging to measure, analyze, and control the deformation and space attitude of antennas in narrow radomes through geometric measurement to ensure the accuracy of phased array radar application. In this manuscript, a method for rapid measurement of antennas by adopting the combination of photogrammetry system, laser tracker and total station was proposed. The photogrammetric method was used with a homemade auxiliary tool to measure and calculate the antenna's deformation under different temperatures and pitch angles. Mapping relations between the instrumental coordinate systems of photogrammetry system, laser tracker and total station were established through common points, including target balls and reflectors. Coordinates of mark points on antenna surface were converted from photogrammetric coordinate system to laser tracker's and total station's coordinate system. Thus, antenna's pitch angles relative to the local horizontal plane and deflection angles relative to the north of the engineering coordinate system were calculated. Planar fitting, coordinate transformation and space attitude calculation were all carried out in the Spatial Analyzer (SA) software. The photogrammetric method detected the antenna's gravitational deformation sensitively, the maximum Root Mean Square Residual (RMSR) of the reference length was 54 µm, and that of the mark points was 59 µm, which was stably in line with its nominal accuracy. Deviations caused by coordinate transformation had no significant effect on the calculation of antenna's spatial attitude, for the maximum deviation between the converted and measured coordinates in laser tracker's coordinate system was 0.139 mm, and that in total station's coordinate system was 1.037 mm, both of which were within reasonable limits of the derived theoretical maximum deviations between different instruments. As a result, the maximum deviation between the calculated value and servo system's nominal value of antenna's pitch angle was 59.4 , and that of antenna's deflection angle was 91.87 . This method's efficiency was greatly improved by about ten times compared with traditional methods through statistics and estimates.
In the recent years, the wind energy building is rapidly developed world wide as a new kind of building style, for its low price and it’s friendly to environment. The wind energy building a combination of wind power and buildings, it could turn wind power into electric energy, which also could relieve the energy scarcity problem to some extent. The wind driven generator and high-rise building structure were integrated, and ANSYS was used to complete the analysis of the behaviors of structures with and without wind generator, under EI-Centro earthquake wave and Taft earthquake wave. By comparing the results of those two models, the feasibility of the wind energy and building integration was verified.
More and more attention has been paid on the development and utilization of new energy sources, as the global energy crisis escalated. Combined with the concept of wind energy generation and High-raise steel structure, a new type of building structure is proposed integrating high-rise steel structure with vertical axis wind turbines. Static analysis under equivalent wind load of seven different wind pressures were carried out on two models, one with wind turbines and the other one without. The feasibility of this new structure was verified preliminarily by comparing analysis results.
The utilization of new energy sources, like wind power, has become more and more popular as the global energy crisis escalated. Preliminary mechanical analysis was done to verify the feasibility of a new type of building structure, integrated high-rise steel structure with vertical axis wind turbines. Time history analysis under the action of EI-Centro earthquake wave and Wenchuan earthquake wave were carried out on the model with wind turbines and the other one without. The seismic behavior of this new structure was analyzed.
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