Study On The Deformation Of Antenna Array In Wing And Its Compensation

In recent years,high-altitude long-endurance unmanned airborne has attracted extensive attention.Its light and large wingspan is easily deformed by its own load and external factors during flight.As the carrier of antenna array,the deformation of wing causes the distortion of antenna array pattern.Therefore,it is an important subject to study the deformation analysis and compensation of antenna array in wing.Due to the problem of non-smooth transition of wing model with deformation curve and the resource limitation of deformation model calculation with multi-scale and electrically large size,it is impossible to simulate the change of antenna array pattern when wing flutter.Therefore,it is necessary to establish an accurate wing deformation model,calculate its pattern precisely,study the variation rule of the pattern,and then optimize the deformation pattern.Aiming at the problem of accurate establishment and accurate calculation of wing deformation model,In the paper,the deformation analysis of antenna array in wing is studied based on the high-order method of moments(HO-Mo M)and the parallel computing technology of high-performance computer cluster of Xi Dian university.Firstly,the wing model is processed by using the fine line and bilinear surface structure modeling principle of HO-Mo M and mesh generation technique.Then,the wing deformation model of different degrees is established by referring to the real-time deformation curve.Finally,the variation rule of the wing deformation pattern is calculated and analyzed.In addition,aiming at the problem of offset angle compensation of wing deformation pattern,the improved particle swarm optimization(PSO)algorithm is taked as the theoretical basis,the optimal solution of feeding parameters is obtained and then the deformation pattern is compensated by setting the optimization objective and crowning it with appropriate inertia weight.On the basis of accurately establishing the deformation model of the antenna array and wing,taking the broadband microstrip Yagi antenna as the unit antenna of the wing antenna array,the pattern change of the antenna array is analyzed in detail by taking the 20% upward deformation of the antenna array as an example.The conclusion shows that the lobe width of H-plane of the antenna array is narrowed,the energy of the whole plane is reduced,the E-plane pattern is basically unchanged,and maximum gain of xoz-plane pattern deviates from the +z axis 13 degree.Secondly,the influence rule of antenna array deformation patterns to different degrees is studied.The results of H-plane pattern and E-plane pattern are the same as that of 20% upward deformation of antenna array.Then,the influence rule of wing deformation patterns to different degrees is studied by the same method.The conclusion shows that the patterns of H plane and E plane are almost unchanged,and the angle that maximum gain of the xoz-plane pattern offset +z axis increases with the increase of the deformational degree.Finally,an example of 20% upward deformation of wing is given to compensate the angle of offset +z axis 14 degree.In the paper,the wing is taken as the research object of deformation,from accurately establishing deformation model to studying the deformation influence rule of antenna array in wing,and then to the research on compensation of deformation pattern offset angle,which provides theoretical support for practical engineering applications.