Array antenna vibration deformation prediction method and device based on main modal method and strain
An array antenna and prediction method technology, applied in the antenna field, can solve problems such as difficult to reflect antenna deformation, and achieve the effect of improving reconstruction accuracy
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Embodiment 1
[0137] Such as figure 1 , an array antenna vibration deformation prediction method based on principal mode method and strain, including the following steps:
[0138] S1. The number of mode shapes is estimated by the effective mass method, including:
[0139] S11. Obtain the differential equation of the multi-degree-of-freedom system under the action of ground motion, as follows:
[0140]
[0141] Among them, M represents mass, C represents damping, K represents stiffness, I represents moment of inertia, represents the acceleration, represents velocity, x represents displacement, Actual ground motion acceleration.
[0142] Formula (1) is actually a coupled equation system, the displacement x of formula (1) is taken as displacement vector x, and then according to x j ={φ} i q i Perform principal coordinate transformation, where {φ} j is the displacement coordinate transformation matrix of the jth mode, q j is the displacement of the jth order modal particle relati...
Embodiment 2
[0244] Prediction equipment for array antenna vibration deformation prediction method based on principal mode method and strain, including;
[0245] An estimation module for estimating the number of mode shapes by the effective mass method; also includes;
[0246] Obtain the differential equation of the multi-degree-of-freedom system under the action of ground motion, as follows:
[0247]
[0248] Among them, M represents mass, C represents damping, K represents stiffness, I represents moment of inertia, represents the acceleration, represents velocity, x represents displacement, Actual ground motion acceleration.
[0249] Formula (1) is actually a coupled equation system, the displacement x of formula (1) is taken as displacement vector x, and then according to x j ={φ} i q i Perform principal coordinate transformation, where {φ} j is the displacement coordinate transformation matrix of the jth mode, q j is the displacement of the jth order modal particle relati...
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