Control-orientated large antenna modeling method
A modeling method and antenna technology, applied in adaptive control, general control system, control/adjustment system, etc., can solve the problems of not considering the antenna structure pointing deviation, large workload, and reducing the accuracy of error compensation.
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[0067] The used model of the present invention has: 1) the antenna finite element model that establishs in the finite element analysis software (ANSYS).
[0068] Modeling principle:
[0069] (1) Principle of preliminary parameter extraction:
[0070] First, according to the existing finite element modeling method, the finite element model is established based on the position of the reflecting surface under the structural working condition, and a certain frequency F is used as the constraint condition. In general, attention is paid to the low frequency characteristics of the structure, so F is taken as 100Hz, and the application The finite element software analyzes the mode shapes of each order within F, assuming that there are n orders in total, and each order is coded as S1, S2...Sn, and n is selected d degrees of freedom, n d The value is generally greater than 2 times the order. According to the vibration theory, extract the mode shapes of each order to form the mode matr...
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