Patent ID: 11962395
Assignee: CHINA STARWIN SCIENCE & TECHNOLOGY CO., LTD
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. The whole-airspace satellite search device based on the phased array antenna according to claim 12, wherein in the whole-airspace satellite search method based on the phased array antenna, the step of calculating, based on the attitude data of the array surface of the phased array antenna in the attitude reference frame of the inertial navigation device, a pointing angle of an aiming beam, comprises the following sub-steps:
converting the attitude data of the array surface of the phased array antenna in the attitude reference frame of the inertial navigation device into attitude data in a north-east-down (NED) frame according to the following rotation matrixes:, C
       x
      
      ⁢
      
       (
       α
       )
      
     
     =
     
      [
      
       
        
         1
        
        
         0
        
        
         0
        
       
       
        
         0
        
        
         
          cos
          ⁢
          α
         
        
        
         
          sin
          ⁢
          α
         
        
       
       
        
         0
        
        
         
          
           -
           sin
          
          ⁢
          α
         
        
        
         
          cos
          ⁢
          α
         
        
       
      
      ]
     
    
   
  
  
   
    
     
      
       C
       y
      
      ⁢
      
       (
       β
       )
      
     
     =
     
      [
      
       
        
         
          cos
          ⁢
          β
         
        
        
         0
        
        
         
          
           -
           sin
          
          ⁢
          β
         
        
       
       
        
         0
        
        
         1
        
        
         0
        
       
       
        
         
          sin
          ⁢
          β
         
        
        
         0
        
        
         
          cos
          ⁢
          β
         
        
       
      
      ]
     
    
   
  
  
   
    
     
      
       C
       z
      
      ⁢
      
       (
       γ
       )
      
     
     =
     
      [
      
       
        
         
          cos
          ⁢
          γ
         
        
        
         
          sin
          ⁢
          γ
         
        
        
         0
        
       
       
        
         
          
           -
           sin
          
          ⁢
          γ
         
        
        
         
          cos
          ⁢
          γ
         
        
        
         0
        
       
       
        
         0
        
        
         0
        
        
         1
        
       
      
      ], x(α)(γ)s around an x-axis, a y-axis, and a z-axis, respectively;
acquiring, based on the attitude data of the array surface of the phased array antenna in the NED frame, an attitude vector of the array surface of the phased array antenna in the NED frame;
acquiring, by a satellite locator, a current position of the array surface of the phased array antenna; and acquiring, based on the current position of the array surface of the phased array antenna, a first coordinate vector a of the array surface of the phased array antenna in a geocentric coordinate system;
acquiring, by a satellite communications on a move (SOTM) modem,
a current position of a target satellite; and acquiring, based on the current position of the target satellite, a second coordinate vector {right arrow over (b)} of the target satellite in the geocentric coordinate system;
calculating, based on the first coordinate vector a and the second coordinate vector {right arrow over (b)}, a target vector {right arrow over (c)}={right arrow over (b)}−{right arrow over (a)};
performing, based on the attitude vector of the array surface of the phased array antenna in the NED frame, a coordinate transformation on the target vector {right arrow over (c)} to acquire a pitch angle error value Δβ and a yaw angle error value Δγ to be adjusted by the phased array antenna; and
performing, based on the pitch angle error value Δβ and the yaw angle error value Δγ, an error reduction control on a pitch motor and an azimuth motor, respectively; and updating to acquire the pointing angle of the aiming beam.