Patent ID: 11897635
Assignee: SPACE ENGINEERING UNIVERSITY
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 8:
9. The method for maintaining Walker constellation formation according to claim 8, wherein the step of performing quadratic polynomial fitting on the relational expression to obtain the first-order variation rate and the variation acceleration of relative drift of each satellite within the simulation time period further comprises:
performing quadratic polynomial fitting on the relational expression to obtain a first-order variation rate k1Ω of the relative drift of the right ascension of ascending node, a variation acceleration k2Ω of the relative drift of the right ascension of ascending node, a first-order variation rate k1λ of the relative drift of the along-track angle and a variation acceleration k2λ of the relative drift of the along-track angle; and
determining, according to a fourth formula, a first-order variation rate kΩ′ generated by the initial offset amount of the right ascension of ascending node and a first-order variation rate kλ′ generated by the initial offset amount of the along-track angle, wherein the fourth formula is written as:, {
  
   
    
     
      
       
        k
        Ω
        ′
       
       =
       
        -
        
         
          
           
            k
            1
            Ω
           
           ⁢
           
            t
            
             e
             ⁢
             n
             ⁢
             d
            
           
          
          +
          
           
            0
            .
            5
           
           ⁢
           
            k
            2
            Ω
           
           ⁢
           
            t
            
             e
             ⁢
             n
             ⁢
             d
            
            2
           
          
         
         
          t
          
           e
           ⁢
           n
           ⁢
           d
          
         
        
       
      
     
    
    
     
      
       
        k
        λ
        ′
       
       =
       
        
         
          
           k
           1
           λ
          
          ⁢
          
           t
           
            e
            ⁢
            n
            ⁢
            d
           
          
         
         +
         
          
           0
           .
           5
          
          ⁢
          
           k
           2
           λ
          
          ⁢
          
           t
           
            e
            ⁢
            n
            ⁢
            d
           
           2
          
         
        
        
         t
         
          e
          ⁢
          n
          ⁢
          d
         
        
       
      
     
    
   
   .